CN105777997A - Method for manufacturing expandable polystyrene and expandable polystyrene prepared thereby - Google Patents
Method for manufacturing expandable polystyrene and expandable polystyrene prepared thereby Download PDFInfo
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- CN105777997A CN105777997A CN201410811840.6A CN201410811840A CN105777997A CN 105777997 A CN105777997 A CN 105777997A CN 201410811840 A CN201410811840 A CN 201410811840A CN 105777997 A CN105777997 A CN 105777997A
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- Prior art keywords
- expandable polystyrene
- polystyrene
- aluminum
- microsphere
- polymerization
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- 229920006248 expandable polystyrene Polymers 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 47
- 239000004005 microsphere Substances 0.000 claims abstract description 40
- 239000003999 initiator Substances 0.000 claims abstract description 38
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 36
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000012212 insulator Substances 0.000 claims abstract description 28
- 239000004793 Polystyrene Substances 0.000 claims abstract description 25
- 229920002223 polystyrene Polymers 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 47
- 239000000725 suspension Substances 0.000 claims description 38
- 239000000203 mixture Substances 0.000 claims description 28
- 238000000465 moulding Methods 0.000 claims description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 21
- 229910002804 graphite Inorganic materials 0.000 claims description 21
- 239000010439 graphite Substances 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 21
- 239000004088 foaming agent Substances 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 13
- 239000000375 suspending agent Substances 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000000454 talc Substances 0.000 claims description 6
- 229910052623 talc Inorganic materials 0.000 claims description 6
- 235000012222 talc Nutrition 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- NJQQAQAODQCDLA-UHFFFAOYSA-N 4-methoxypentanenitrile Chemical compound COC(C)CCC#N NJQQAQAODQCDLA-UHFFFAOYSA-N 0.000 claims description 2
- DUJMVKJJUANUMQ-UHFFFAOYSA-N 4-methylpentanenitrile Chemical compound CC(C)CCC#N DUJMVKJJUANUMQ-UHFFFAOYSA-N 0.000 claims description 2
- KQNPFQTWMSNSAP-UHFFFAOYSA-N isobutyric acid Chemical compound CC(C)C(O)=O KQNPFQTWMSNSAP-UHFFFAOYSA-N 0.000 claims description 2
- LRDFRRGEGBBSRN-UHFFFAOYSA-N isobutyronitrile Chemical compound CC(C)C#N LRDFRRGEGBBSRN-UHFFFAOYSA-N 0.000 claims description 2
- OJURWUUOVGOHJZ-UHFFFAOYSA-N methyl 2-[(2-acetyloxyphenyl)methyl-[2-[(2-acetyloxyphenyl)methyl-(2-methoxy-2-oxoethyl)amino]ethyl]amino]acetate Chemical compound C=1C=CC=C(OC(C)=O)C=1CN(CC(=O)OC)CCN(CC(=O)OC)CC1=CC=CC=C1OC(C)=O OJURWUUOVGOHJZ-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000000178 monomer Substances 0.000 abstract 1
- 239000011324 bead Substances 0.000 description 31
- 239000006260 foam Substances 0.000 description 21
- 239000008187 granular material Substances 0.000 description 16
- 238000010899 nucleation Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 229920000642 polymer Polymers 0.000 description 12
- 206010000269 abscess Diseases 0.000 description 9
- 239000003063 flame retardant Substances 0.000 description 9
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 8
- 229920006327 polystyrene foam Polymers 0.000 description 7
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000004342 Benzoyl peroxide Substances 0.000 description 5
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 235000019400 benzoyl peroxide Nutrition 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 229910010272 inorganic material Inorganic materials 0.000 description 5
- 239000011147 inorganic material Substances 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- DEIGXXQKDWULML-UHFFFAOYSA-N 1,2,5,6,9,10-hexabromocyclododecane Chemical compound BrC1CCC(Br)C(Br)CCC(Br)C(Br)CCC1Br DEIGXXQKDWULML-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical class N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- 229940078499 tricalcium phosphate Drugs 0.000 description 2
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 2
- 235000019731 tricalcium phosphate Nutrition 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- FJNNYLPBIOZVIQ-UHFFFAOYSA-N 1,2,3-tribromo-4-prop-2-enoxybenzene Chemical compound BrC1=CC=C(OCC=C)C(Br)=C1Br FJNNYLPBIOZVIQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium peroxydisulfate Substances [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 1
- VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- WJTCGQSWYFHTAC-UHFFFAOYSA-N cyclooctane Chemical compound C1CCCCCCC1 WJTCGQSWYFHTAC-UHFFFAOYSA-N 0.000 description 1
- 239000004914 cyclooctane Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 1
- 125000004817 pentamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 235000019394 potassium persulphate Nutrition 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/16—Making expandable particles
- C08J9/20—Making expandable particles by suspension polymerisation in the presence of the blowing agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F12/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F12/02—Monomers containing only one unsaturated aliphatic radical
- C08F12/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F12/06—Hydrocarbons
- C08F12/08—Styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/18—Suspension polymerisation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
- C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0812—Aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
Disclosed is expandable polystyrene, which possesses excellent heat-insulating properties, and can avoid deformation caused by direct sunlight, and meanwhile maintain excellent mechanical performances of routine expandable polystyrene. Also disclosed is a method for manufacturing expandable polystyrene. The method comprises: preparing microspheres including polystyrene and aluminum; suspending the microspheres in water; and slowly and continuously adding a polystyrene monomer compound including an azo initiator for polymerization. A routine insulator including black athermanous materials can degrade when exposed to sunshine; while an expandable polystyrene protection insulator does not degrade when exposed to sunshine, thereby is suitable for a building insulator. In addition, the polymerization time for preparing expandable polystyrene is short, thereby improving production efficiency.
Description
Technical field
The present invention relates to expandable polystyrene, described expandable polystyrene has the heat-proof quality of excellence and prevents the deformation caused by direct sunlight, it is maintained with the excellent mechanical performance of the expandable polystyrene of routine and the method relating to preparing described expandable polystyrene with higher productivity ratio.
Background technology
Expandable polystyrene resin is widely used in industry-by-industry, for instance packaging material and construction material.It is continued for studying, to improve the heat-proof quality of the insulator for construction material.
Generally, to need to have low thermal conductivity excellent heat insulation to realize for insulator.In order to meet this requirement, fluorinated gas is used as foaming agent in the preparation of expandable polystyrene system resin.But, fluorinated gas is classified as the ozone layer destroying the earth, and their use is increasingly restricted.Owing to fluorinated gas discharges in time, therefore polystyrene resin can lose its heat-proof quality.For those reasons, the use of fluorinated gas gradually decreases.
In such cases, it has been proposed that many methods being intended to substitute fluorinated blowing agent, to reduce the thermal conductivity of polystyrene foam.These methods of great majority are relevant without the material negatively affecting environment with the thermal conductivity that addition can reduce foam.
Such as, Korean Patent discloses No. 2001-0071028 method disclosing the expandable polystyrene particle with high yield preparation with desired size.According to this method, make styrene polymerization under graphite granule exists, wherein add foaming agent before, during or after polymerization.Korean Patent discloses No. 2004-0073277 and proposes the expandable polystyrene bead prepared in the following manner: make styrene monomer be polymerized in the waterborne suspension containing graphite or carbon black pellet and pentane, washing polymerizate, and make the described polymerizate short time be exposed in hot-air stream, and propose the method for preparing described expandable polystyrene bead.
But, the athermanous inorganic material including graphite is not easy to add the forming process of expandable polystyrene particle.Athermanous inorganic material does not dissolve in styrene, and owing to it is relatively low with the compatibility of polymeric matrix resin, they can not fully be scattered in polymeric matrix resin.Additionally, athermanous inorganic material hinders the dispersion instability forming or making granule of granules of polystyrene by suspension polymerisation.
In the trial overcoming these shortcomings, the use of excess disperse agent causes that the particle size distribution of gained polystyrene broadens, and forms the beadlet of deformation, and forms fine grained, thus causing that productivity is at a fairly low.The use of graphite and other athermanous inorganic material particle causes that the foam structure of foam is uneven；The surface of beadlet is formed pin hole, and then causes high poisture-penetrability；And adiathermance material is easily moisture during being polymerized, and then the water content increase of final moulding article and the heat-proof quality of moulding article are reduced.
Another kind of preparation method relates to add foaming agent in the process of polystyrene and the warm coextrusion of graphite granule congruent melting.
But, this method causes the decomposition of additive such as fire retardant, and causes the heat being difficult to control to be sent by melt in this process.The pickup of foaming agent is also limited, has 20kg/m so that can not manufacture3Or less low-density moulding article.
Korea patent registration the 0801275th proposes the method preparing expandable polystyrene bead in the following manner: polystyrene is coextruded into small size together with graphite granule, and makes described extrudate be polymerized in the reactor with styrene monomer.
According to this method, process with extrusion and aggregate combinations, thus causing that production cost raises.It is important that improve the productivity ratio of polymerization process, to reduce the production cost of expandable polystyrene bead.For this, be try to by increasing the yield of every batch increases expandable polystyrene bead in given polymerization time productivity or the polymerization time that is shortened by under predetermined yield improves the productivity ratio of expandable polystyrene bead.
These are attempted, it is necessary to increase content or the at high temperature induced polymerization of styrene monomer.But, in this case, the suspension for being polymerized becomes unstable, thus resulting in the granule of a large amount of deformation.When being intended at the temperature that suspension becomes stable acquisition high yield, it is necessary to be polymerized for a long time, thus causing low productivity ratio.
On the other hand, when being loaded by moulding the insulator of the expandable polystyrene manufacture comprising excessive graphite granule or be arranged on outdoor and be directly exposed under sunlight, graphite increases the temperature of insulator as black matrix, makes insulator softening or melted, and makes the appearance deformation of insulator.
For overcoming shortcoming easily from sunlight, it is considered to the method applying there is the athermanous inorganic material of the such as aluminum or Talcum of high heat reflectivity in insulator.
But, owing to aluminum is to have high specific gravity and polymer lacks the metal of affinity, therefore, being homogeneously dispersed in polymer plastic by aluminum has sizable difficulty.Excessive aluminum can be added effectively to stop infrared ray during being polymerized.But, in this case, the suspension containing aluminum is difficult to stably keep dispersion, and dipping aluminum is not easy to during being polymerized.This low pickling efficiency causes that cost raises.
There is excessive water in the course of the polymerization process can make the structure of abscess bigger or irregular, and described abscess is the micron-sized separate space formed in the foam.In extreme circumstances, abscess subsides, so that the physical property deterioration of the insulator as final moulding article.
As the solution of the problems referred to above, Korean Patent discloses No. 1991-0700314 and proposes and formed containing aluminized coating on the surface of polyurethane-moulded articles.
According to this patent disclosure, aluminized coating block ultraviolet, to prevent the variable color in appearance of polyurethane insulator and deformation.But, the effect of the heat-proof quality improving polyurethane-moulded articles is not yet known.Additionally, the damage of aluminized coating makes the ultraviolet blocking effect of not expectability aluminized coating during the process of polyurethane-moulded articles.
Therefore, need exploitation for the material of insulator, described material has low thermal conductivity, and even at when being exposed under direct sunlight without deformation, meet insulator, such as the requirement of water absorption rate (it is defined as in water to soak the amount of absorbed water after the scheduled time) and intensity etc simultaneously.
Also need to overcome the various methods of problem encountered (such as poor efficiency and high production cost) during with conventional thermal barrier body material.
Summary of the invention
Consider that the problems referred to above make the present invention, and it is an object of the invention to provide the expandable polystyrene of the characteristic in intensity, heat-proof quality and the stability to direct sunlight with improvement, and for preparing the improved method of described expandable polystyrene.
The present invention is provided to prepare the method for expandable polystyrene, described method includes: mixing and extrusion comprise the compositions of polystyrene and aluminum, comprises the described polystyrene of 80-99.5 weight % and the microsphere of the described aluminum of 0.5-20 weight % with preparation；Suspend in water to obtain waterborne suspension by described microsphere and suspending agent；Raise the temperature of described waterborne suspension, in the waterborne suspension of described heating, be continuously added to the styrene monomer compositions comprising azo initiator, with post polymerization；Raise the temperature of polyblend and be added thereto to foaming agent, to obtain expandable polystyrene product；With dehydration dry described expandable polystyrene product.
The present invention also provides for the expandable polystyrene prepared by described method.
The present invention also provides for the insulator by moulding the expandable polystyrene manufacture prepared by described method.
According to the present invention, the expandable polystyrene of the present invention can be used for manufacturing and has excellent heat-proof quality and meet the insulator foam in the requirement of mechanical properties simultaneously.
Conventional thermal barrier body containing black adiathermance material can be degraded when exposed to sunlight.By contrast, the expandable polystyrene protection insulator of the present invention avoids degrading when exposed to sunlight, is therefore suitable for the insulator of building.
Use azo initiator to be used in the polymerization time of the expandable polystyrene preparing the present invention as main initiators and shorten at least 25% compared with the polymerization time of the expandable polystyrene for preparing routine, thus showing the productivity ratio of the raising of the expandable polystyrene of the present invention.
Detailed description of the invention
The present invention relates to the expandable polystyrene for manufacturing polystyrene foam, described polystyrene foam is for, in various application, being mainly insulator.Specifically, the expandable polystyrene of the present invention is prepared by the method comprised the following steps: mixing and extrusion adiathermance material (such as aluminum) and polystyrene are to prepare microsphere；The preparation waterborne suspension containing described microsphere；The styrene monomer compositions comprising azo initiator is added at low temperatures with induced polymerization in described waterborne suspension；In polyblend, at high temperature add foaming agent to obtain expandable polystyrene product；With dehydration dry described expandable polystyrene product.
The adiathermance material of such as graphite can be directly added into during styrene polymerization.But, in styrene polymerization, the frequently gathering of polystyrene bead causes the water that polystyrene contains high water content, and then causes that the heat-proof quality of moulding article is poor, or the abscess of expandable bead is unstable, and the mechanical performance of moulding article (such as intensity) deterioration.
The insulator comprising excessive black adiathermance granule (such as graphite granule) absorbs the sunlight of major part wavelength and seems blackout.Therefore, when being loaded or be arranged on outdoor and be directly exposed under sunlight by insulator, graphite increases the temperature of insulator as black matrix.The high temperature increased makes insulator softening or melted, thus causing the outward appearance of insulator can flexible risk.
In the present invention, mixing to prepare microsphere with polystyrene using the aluminum as adiathermance material, then described microsphere is used as the seed of styrene polymerization, rather than adds the adiathermance material of such as graphite during being polymerized.
Alumina particles is preferably lamellar in shape.Owing to flaky aluminum can be efficiently reflected into the sunlight penetrated, therefore, it can be reflected into the infrared light of foam, and is possible to prevent heat accumulation in the foam, to suppress the increase of foam temperature, thus protecting foam to avoid thermal deformation.
The particle diameter of aluminum is preferably in the scope of 5-200 μm, more preferably in the scope of 10-50 μm.Within the scope of this, it can be ensured that reduce dispersed in microsphere of thermal conductivity and aluminum.
If the particle diameter of aluminum is less than above-mentioned lower limit, then the effect reflecting sunlight can be ignored.On the other hand, if the particle diameter of aluminum exceedes above-mentioned higher limit, then aluminum may not be evenly dispersed in microsphere, and it may happen that abscess destroys when with post-foaming, thus deteriorating the physical property of insulator as final moulding article.
In microsphere, the content of aluminum is preferably 0.5-20 weight %.If the addition of aluminum is too small, then incident infrared light can not be reflected fully.On the other hand, if the addition of aluminum is excessive, then microsphere suspended state in waterborne suspension becomes unstable, thus extending the time for seeding polymerization, and alumina particles is continuously present in foam, thus increasing the thermal conductivity of foam.
In the present invention, it is possible to additionally use at least one adiathermance material selected from Talcum, calcium carbonate, Muscovitum and graphite together with aluminum, to realize heat-proof quality, better stability to degradation and the lower thermal conductivity that foam improves further.Preferably, the particle diameter of the adiathermance material additionally used in the scope of 0.35-300 μm, and the adiathermance material additionally used in microsphere based on its content of aluminum of 100 weight portions in the scope of 10-100 weight portion.Within the scope of these, high mechanical strength can be kept, without extending the time for seeding polymerization and sacrificing the ability of aluminum reflection sunlight.
On the other hand, the high specific gravity due to aluminum and the low-affinity to polymer, it can not be uniformly adhered to the inside of foam.
For solving this problem, it is preferred that before being mixed with polystyrene by alumina particles, it is coated with described alumina particles with fatty acid.Described fatty acid is preferably stearic acid or oleic acid.
Preferably, microsphere has uniform particle diameter, enables them to stably be suspended in water to form waterborne suspension.The particle size distribution of microsphere can in the scope of 0.3-1.5mm.
Microsphere can use single screw extrusion machine or double screw extruder to prepare.The above-mentioned size of microsphere can use imderwater cutting comminutor or water-cooled die face cutting comminutor to obtain.
Can suspending in water to prepare waterborne suspension by microsphere together with suspending agent, described waterborne suspension may be used for seeding polymerization subsequently.
Suspending agent can be any those in styrene polymerization commonly used in the art.Suspending agent can be tricalcium phosphate, but is not limited to this.
The effect of suspending agent is dispersion microsphere independently, even if the condition of seeding polymerization changes in water, for instance the addition of styrene monomer or the rising of temperature, without gathering.That is, suspending agent can be used for stably keeping the suspended state of microsphere.
Seeding polymerization can by raise waterborne suspension temperature and in heated waterborne suspension slowly and be added continuously the styrene monomer compositions comprising azo initiator and carry out.
During seeding polymerization, styrene monomer is immersed in microsphere, grows granules of polystyrene in described microsphere.
General peroxide initiator, for instance benzoyl peroxide (BPO) may be used for styrene polymerization.But, in this case, the free radical of initiator is adsorbed to the black matrix of such as graphite or white carbon black.The absorption of this free radical makes it difficult to carry out seeding polymerization at low temperatures and extend polymerization time, thus causing that productivity ratio is relatively low.Solution as these problems, it may be considered that raise reaction temperature.But, high temperature can cause the suspension of instability, as a result of which it is, abnormal granule can be obtained or polymer can solidify in bulk in the reactor.
In the present invention, azo initiator has 10 hr half-life temperature of 30 DEG C to 80 DEG C.Azo initiator and styrene monomer slowly together and are added continuously in waterborne suspension.Styrene monomer penetrates in microsphere, even and if azo initiator make also can realize the rapid polymerization of styrene monomer under about 70 DEG C to the low temperature of 80 DEG C.By adding azo initiator, the particle diameter of gained polystyrene is controlled, and suspended state also remains stable for, thus solving the problems referred to above of the general initiator for styrene polymerization.
It addition, above-mentioned rapid polymerization makes it possible to increase the addition of styrene monomer, it is therefore contemplated that cost can be reduced and improves productivity ratio.
Azo initiator is preferably chosen from 2, double; two (isopropylformic acid .) dimethyl ester of 2 '-azo, 2,2 '-azo double; two-2,4-methyl pentane nitrile, 2,2 '-azo double; two (isopropyl cyanide), 2,2 '-azo double; two (4-methoxyl-valeronitrile), and their mixture.
Azo initiator is preferably 0.01-0.5 weight portion based on the consumption that makes of 100 weight parts of styrene monomer added.
If the addition of azo initiator is less than 0.01 weight portion, then the time required for seeding polymerization is longer.On the other hand, if the addition of azo initiator is more than 0.5 weight portion, then seeding polymerization happens very fast, as a result of which it is, obtain undesired low-molecular weight polymer, thus causing that mechanical strength deteriorates.
Seeding polymerization preferably carries out by this way: the styrene monomer compositions comprising azo initiator slowly and was added continuously in waterborne suspension through 2-3 hour, and makes the polystyrene reactant of itself and microsphere.
If being added in 2 hours of styrene monomer compositions completes, then polyreaction occurs competitively, and therefore, the molecular weight reduction of final polystyrene, thus causing that mechanical performance is poor.On the other hand, if the interpolation of styrene monomer compositions did not complete in 3 hours, then polymerization time adversely extends.
When seeding polymerization temperature is lower than 70 DEG C, polystyrene can not fully soften, so that be difficult to be introduced by foaming agent in polystyrene and to make it difficult to granule spherical in shape.On the other hand, seeding polymerization temperature is undesirable more than 80 DEG C economically.
Dispersant can be added during seeding polymerization.The effect of dispersant is to prevent polymer aggregational.
In the present invention, the process that preparation comprises the styrene monomer compositions being dissolved in azo initiator therein can add at least one initiator further.Additional initiator can be selected from high-temperature initiator, for instance peroxidized t-butyl perbenzoate, and water soluble persulfates initiator, for instance potassium peroxydisulfate, Ammonium persulfate. and sodium peroxydisulfate.
Azo initiator is added in waterborne suspension, with promptly polymerizing styrene monomer.As a result of which it is, obtain substantial amounts of low-molecular weight polymer, thus realizing the improvement of expandability, but the heavy polymer of acquisition relatively small amount, thus causing the loss of mechanical strength.
Add water soluble persulfates initiator further, to increase the molecular weight of polymerizate continuously.The effect of persulfate initiator is to increase the ratio of heavy polymer, and makes the proportional balancing method of itself and low-molecular weight polymer such that it is able to the high expandable polymer that processing machinery intensity does not deteriorate.
Persulfate initiator is based in scope preferably in 0-30 weight portion of the addition of the azo initiator of 100 weight portions.Within the scope of this, final polystyrene height can be sent out, and is maintained with its mechanical strength.
After polymerization terminates, at 100 DEG C to 130 DEG C, impregnate foaming agent 3-6 hour, contain the expandable polystyrene particle of aluminum with preparation.
Foaming agent can be any commonly employed in preparing those of expandable polystyrene.Foaming agent is preferably C4-C6Aliphatic hydrocarbon.Most preferably, foaming agent is selected from pentane, isopentane, Pentamethylene. and their mixture.
The expandable polystyrene of the present invention can comprise one or more additives further.Additive adds in the process prepare expandable polystyrene.
The expandable polystyrene of the present invention can comprise nucleator, the size of abscess of expandable bead and uniformity during to control to foam.
The effect of nucleator is mechanical performance and the heat-proof quality of improving polystyrene foam.If the abscess of polystyrene foam is of a size of 300 μm or bigger, then the thermal conductivity of polystyrene foam can increase due to the gaseous exchange in abscess, and can deteriorate by molding the intensity of the moulding article of described expandable polystyrene bead manufacture.By adding nucleator, the size of abscess can be adjusted to less than 300 μm.
Nucleator can be selected from polyethylene, calcium carbonate, Talcum, clay, silicon dioxide, citric acid, sodium bicarbonate and their mixture.In microsphere, the content of nucleator is preferably 0.05-3.00 weight %.
The expandable polystyrene of the present invention can comprise fire retardant to give foam anti-flammability.
Fire retardant can be selected from brominated flame retardant, for instance HBCD, tetrabromo cyclooctane, ethylene tetrabromide butylcyclohexane and tribromo phenyl allyl ether；General chlorinated flame retardants and general phosphorus flame retardant.In microsphere, the content of fire retardant is preferably 0.1-5.0 weight %.
Aluminum can mixed with polystyrene, suspended in water by microsphere or add in the step of polymerizing styrene monomer by nucleator, fire retardant and one or more optional other additives.
Expandable polystyrene can be foamed by any suitable method known in the art.The existence of alumina particles makes the foam of expandable polystyrene can reflect infrared light to prevent foam from degrading, and reduces the thermal conductivity of foam to realize the characteristic of the improvement of insulator.
Will with reference to the following example, including comparative example and test example, the present invention will be described in more detail.
There is provided these embodiments to be for illustration purposes only, be not intended to limit the present invention.It will become apparent to those of skill in the art that when without departing substantially from the spirit and scope of the present invention, it is understood that there may be various replacements and equivalent.
<embodiment 1>
By 100kg polystyrene (G1160, HyundaiEP, Korea), 10kg aluminum (lamellar) paste (1100MA, TOYOAluminumK.K, Japan) it is fed at 220 DEG C in the double screw extruder of operation as the mixture of the HBCD (Albemarle company, U.S.A.) of fire retardant with 2kg and melts.Molten mixture is extruded and used imderwater cutting granulator granulation to obtain microsphere, and its particle size distribution is in the scope of 0.8-1.2mm.
At room temperature, in 100 liters of reactors, 15kg microsphere and 0.15kg are added in 10kg pure water as the tricalcium phosphate (Doobon, Korea) of suspending agent, to obtain waterborne suspension.
0.04kg is dissolved in 20kg styrene monomer as the peroxidized t-butyl perbenzoate (TBPB) of high-temperature initiator and 0.3kg as the HBCD of fire retardant as the azobis isobutyronitrile of low temperature initiators, 0.04kg, to prepare styrene monomer compositions.After the temperature of waterborne suspension is increased to 80 DEG C, styrene monomer compositions was continuously added in waterborne suspension through 2 hours.Mixture is stood 1 hour.
The entrance of reactor was closed after terminating by polymerization, and introduced the 2.45kg pentane (SK, Korea) as foaming agent in polyblend through 30 minutes.Gained mixture is heated to 125 DEG C, keeps 3 hours, and be cooled to 40 DEG C, it is thus achieved that granule.After drying, with general coating agent coated particle, to prepare expandable polystyrene bead.
<embodiment 2>
Expandable polystyrene bead is prepared in the same manner as in example 1, except it is possible to additionally incorporate 2kg graphite and 8kg Talcum to obtain microsphere in aluminum (lamellar) paste.
<embodiment 3>
Expandable polystyrene bead is prepared in the same manner as in example 1, except it is possible to additionally incorporate the 20g PE-wax (Honeywell) as nucleator to obtain microsphere.
<embodiment 4>
Expandable polystyrene bead is prepared in the same manner as in example 1, except the temperature of waterborne suspension is increased to 70 DEG C, is polymerized at such a temperature.
<embodiment 5>
Expandable polystyrene bead is prepared in the same manner as in example 1, except changing the amount of azobis isobutyronitrile into 0.08kg.
<embodiment 6>
Expandable polystyrene bead is prepared in the same manner as in example 1, except before styrene monomer compositions is added in waterborne suspension, 0.4kg is added in waterborne suspension as the hydrogen peroxide of free radical adsorbent, to prevent styrene monomer compositions from invading the pre-polymerization in microsphere in leaching.
<embodiment 7>
Expandable polystyrene bead is prepared in the same manner as in example 1, except the entrance of closed reactor under stress and introduce styrene monomer compositions in reactor, to promote that compositions is impregnated in microsphere.
<comparative example 1>
Expandable polystyrene bead is prepared in the same manner as in example 1, replaces aluminum (lamellar) paste to obtain microsphere except with 6kg graphite.
<comparative example 2>
Expandable polystyrene bead is prepared in the same manner as in example 1, except with benzoyl peroxide (BPO, Hansol) as initiator.
<comparative example 3>
Expandable polystyrene bead is prepared in the same manner as in example 1, replace azobis isobutyronitrile as initiator to prepare styrene monomer compositions except with benzoyl peroxide, 5kg styrene monomer compositions is added in waterborne suspension and stands 1 hour, the entrance of reactor is closed, and the remainder of styrene monomer compositions is introduced continuously in reactor, temperature was risen slowly to 125 DEG C through 4 hours from 85 DEG C simultaneously.
<comparative example 4>
Expandable polystyrene bead is prepared in the same manner as in example 1, replaces aluminum (lamellar) paste to obtain microsphere except with the PE-wax (Honeywell) as nucleator.
<comparative example 5>
Expandable polystyrene bead is prepared in the same manner as in example 1, except the temperature of waterborne suspension is increased to 60 DEG C, is polymerized at such a temperature.
<test example 1>
In embodiment 1-7 and comparative example 1-5, to the state of waterborne suspension, complete polyreaction required for time and the state of final polymer beads evaluated.The state of each waterborne suspension is by whether visualization granule is evaluated in the form stablizing spheroid in the aqueous phase of suspension system.When granule not individualism but when flocking together, granule is judged to instability.Result is shown in Table 1.
Table 1
Result from table 1 is it can be seen that use azo initiator (azobis isobutyronitrile) improve the stability of suspension and shorten polymerization time in embodiment 1, thus improve productivity ratio.Additionally, spheroidal particle shows that quality does not deteriorate.
Even if these results are because azo initiator also increases rate of polymerization at low temperatures at short notice, owing to its half-life is shorter.High polymerisation conversion immediate stability suspended state, thus increasing productivity ratio.
But, when seeding polymerization temperature too low (comparative example 5), final product is not spherical but deformation.
<test example 2>
By the expandable polystyrene bead of embodiment 1-7 and comparative example 1-5 steam pre-foaming 30 seconds.The beadlet of prefoam is at room temperature stood 24 hours, and use moulding press molding to manufacture the moulding article with similar proportion.Measure the density of moulding article, thermal conductivity, water absorption rate and bending strength, and result is shown in Table 2.
Each moulding article is cut into the test specimen of 100mm × 100mm × 20mm size, and the place under being exposed to direct sunlight stores 15 days.Hereafter, the stability of direct sunlight is evaluated by moulding article.Result is shown in Table 2.
According to KSM3808:2011 determination of test method thermal conductivity, water absorption rate and bending strength.Evaluate the stability to direct sunlight in the following manner: placed in the sun at 35 DEG C by each moulding article, moulding article is exposed 8 hours under direct sunlight, and whether the apparent condition of visualization moulding article and moulding article deform.
Table 2
It can be seen from the results in table 2 add aluminum or graphite as adiathermance material embodiment 1-3 and comparative example 1 and the moulding article of the expandable polystyrene bead of preparation in 3 after measured with do not add heat-barrier material in comparative example 4, compared with the moulding article of the expandable polystyrene bead of preparation, there is relatively low thermal conductivity.These are it is shown that no matter how expandable polystyrene bead is prepared, and the existence of athermanous heat-barrier material all can be effectively reduced the thermal conductivity of moulding article.
But, although the expandable polystyrene bead of preparation in comparative example 1 wherein introducing excessive graphite is effectively improved the thermal conductivity of moulding article, but the foam of expandable polystyrene bead is degraded when being exposed under direct sunlight and melted, because add the temperature of foam as the graphite of black body absorption sunlight.
The moulding article wherein adding the expandable polystyrene bead that the confirmed ratio of moulding article of the expandable polystyrene bead prepared in example 2 of a small amount of graphite and Talcum is prepared in embodiment 1 has much lower thermal conductivity, guarantees when being exposed under direct sunlight better to dropping stability of solution simultaneously.
From the discussion above it is clear that the method for the present invention includes the polystyrene microsphere making to comprise aluminum polymerization under azo initiator exists.The method according to the invention, owing to stability of suspension good at low temperatures and high rate of polymerization overcome the limitation of typical polymerization and extrusion method simultaneously, for instance poor efficiency and high production cost, it is contemplated that productivity ratio can improve 20-25%.
The expandable polystyrene of the present invention can be used for manufacturing foam, and described bubble goes out the mechanical performance suitable with normal polystyrene foam and has the heat-proof quality of improvement due to its low thermal conductivity.Conventional thermal barrier body containing black adiathermance material has the shortcoming degraded when exposed to sunlight.The expandable polystyrene of the present invention is prevented from this shortcoming, thus is suitable for the insulator of building.
Claims (9)
1. the method for preparing expandable polystyrene, described method includes:
Mixing and extrusion comprise the compositions of polystyrene and aluminum, comprise the polystyrene of 80-99.5 weight % and the microsphere of the aluminum of 0.5-20 weight % with preparation；
Suspend in water to obtain waterborne suspension by described microsphere and suspending agent；
Raise the temperature of described waterborne suspension, in warmed-up waterborne suspension, be continuously added to the styrene monomer compositions comprising azo initiator, with post polymerization；
Raise the temperature of polyblend and be added thereto to foaming agent, to obtain expandable polystyrene product；With
Dehydration dry described expandable polystyrene product.
2. method according to claim 1, wherein said aluminum be shaped as lamellar, and its particle diameter is 5-200 μm.
3. method according to claim 1, wherein, in the step preparing described microsphere, being additionally added at least one adiathermance material selected from Talcum, calcium carbonate, Muscovitum and graphite, its addition makes adiathermance material described in described microsphere based on the content of aluminum described in 100 weight portions in the scope of 10-100 weight portion.
4. method according to claim 1, wherein said azo initiator is selected from 2, double; two (isopropylformic acid .) dimethyl ester of 2 '-azo, 2,2 '-azo double; two-2,4-methyl pentane nitrile, 2,2 '-azo double; two (isopropyl cyanide), 2,2 '-azo double; two (4-methoxyl-valeronitrile) and their mixture.
5. method according to claim 1, wherein said azo initiator is 0.01-0.5 weight portion based on the consumption of the described styrene monomer of 100 weight portions.
6. method according to claim 1, is wherein increased to the temperature of described waterborne suspension 70 DEG C to 80 DEG C, carries out described polymerization at such a temperature.
7. method according to claim 1, is wherein continuously added to described styrene monomer compositions in described waterborne suspension through 2-3 hour.
8. the expandable polystyrene that prepared by the method according to any one of claim 1 to 7.
9. an insulator, its expandable polystyrene prepared by moulding method according to any one of claim 1 to 7 and manufacture.
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| CN1553929A (en) * | 2001-09-12 | 2004-12-08 | 日立化成工业株式会社 | Expandable particles of reclaimed styrene resin, expanded beads, and molded foam |
| CN101942171A (en) * | 2010-10-14 | 2011-01-12 | 河南工业大学 | Method for preparing high-performance polyolefine nano composite material by using reaction filling method |
| CN102675544A (en) * | 2012-04-17 | 2012-09-19 | 宁波燎原电器集团股份有限公司 | Bulk molding compound and preparation method thereof |
| KR101419457B1 (en) * | 2012-08-24 | 2014-07-14 | 현대이피 주식회사 | method for manufacturing expandable styrene polymer containing aluminium particles, and expandable styrene polymer produced thereby |
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| KR20090039877A (en) * | 2007-10-19 | 2009-04-23 | 권혁재 | Method for producing expandable styrene polymers |
| KR101099027B1 (en) * | 2008-12-19 | 2011-12-26 | 금호석유화학 주식회사 | Method for producing expandable polystyrene beads which have excellent flammable capability |
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|---|---|---|---|---|
| CN1553929A (en) * | 2001-09-12 | 2004-12-08 | 日立化成工业株式会社 | Expandable particles of reclaimed styrene resin, expanded beads, and molded foam |
| CN101942171A (en) * | 2010-10-14 | 2011-01-12 | 河南工业大学 | Method for preparing high-performance polyolefine nano composite material by using reaction filling method |
| CN102675544A (en) * | 2012-04-17 | 2012-09-19 | 宁波燎原电器集团股份有限公司 | Bulk molding compound and preparation method thereof |
| KR101419457B1 (en) * | 2012-08-24 | 2014-07-14 | 현대이피 주식회사 | method for manufacturing expandable styrene polymer containing aluminium particles, and expandable styrene polymer produced thereby |
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