JPS5922743B2 - Method for producing polycarbonate moldings with improved hue - Google Patents
Method for producing polycarbonate moldings with improved hueInfo
- Publication number
- JPS5922743B2 JPS5922743B2 JP12633075A JP12633075A JPS5922743B2 JP S5922743 B2 JPS5922743 B2 JP S5922743B2 JP 12633075 A JP12633075 A JP 12633075A JP 12633075 A JP12633075 A JP 12633075A JP S5922743 B2 JPS5922743 B2 JP S5922743B2
- Authority
- JP
- Japan
- Prior art keywords
- polycarbonate
- weight
- hue
- molding
- pellets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000004417 polycarbonate Substances 0.000 title claims description 34
- 229920000515 polycarbonate Polymers 0.000 title claims description 34
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000000465 moulding Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 claims description 21
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 12
- 239000000460 chlorine Substances 0.000 claims description 12
- 229910052801 chlorine Inorganic materials 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 8
- CAAULPUQFIIOTL-UHFFFAOYSA-L methyl phosphate(2-) Chemical compound COP([O-])([O-])=O CAAULPUQFIIOTL-UHFFFAOYSA-L 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 claims 1
- 150000002367 halogens Chemical class 0.000 claims 1
- 235000017168 chlorine Nutrition 0.000 description 12
- -1 diaryl phosphate ester Chemical class 0.000 description 12
- 239000008188 pellet Substances 0.000 description 12
- 239000000843 powder Substances 0.000 description 8
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 6
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical class C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 5
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 229930185605 Bisphenol Natural products 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- FZFAMSAMCHXGEF-UHFFFAOYSA-N chloro formate Chemical compound ClOC=O FZFAMSAMCHXGEF-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 150000003014 phosphoric acid esters Chemical class 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 150000003018 phosphorus compounds Chemical class 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- 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 compound 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 1
- VWGKEVWFBOUAND-UHFFFAOYSA-N 4,4'-thiodiphenol Chemical compound C1=CC(O)=CC=C1SC1=CC=C(O)C=C1 VWGKEVWFBOUAND-UHFFFAOYSA-N 0.000 description 1
- NZGQHKSLKRFZFL-UHFFFAOYSA-N 4-(4-hydroxyphenoxy)phenol Chemical compound C1=CC(O)=CC=C1OC1=CC=C(O)C=C1 NZGQHKSLKRFZFL-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- KKUKTXOBAWVSHC-UHFFFAOYSA-N Dimethylphosphate Chemical compound COP(O)(=O)OC KKUKTXOBAWVSHC-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- VCCBEIPGXKNHFW-UHFFFAOYSA-N biphenyl-4,4'-diol Chemical group C1=CC(O)=CC=C1C1=CC=C(O)C=C1 VCCBEIPGXKNHFW-UHFFFAOYSA-N 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000001309 chloro group Chemical class Cl* 0.000 description 1
- AOGYCOYQMAVAFD-UHFFFAOYSA-N chlorocarbonic acid Chemical class OC(Cl)=O AOGYCOYQMAVAFD-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 150000001924 cycloalkanes Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- CAAULPUQFIIOTL-UHFFFAOYSA-N methyl dihydrogen phosphate Chemical compound COP(O)(O)=O CAAULPUQFIIOTL-UHFFFAOYSA-N 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 150000003003 phosphines Chemical class 0.000 description 1
- 150000008301 phosphite esters Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000001175 rotational moulding Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Description
【発明の詳細な説明】
本発明はポリカーボネートの安定化に関し、更に詳しく
は溶融ポリカーボネートの塩素による変色を防止する方
法に関する。DETAILED DESCRIPTION OF THE INVENTION This invention relates to the stabilization of polycarbonate, and more particularly to a method for preventing chlorine-induced discoloration of molten polycarbonate.
ポリカーボネートの製造法は溶液法と溶融法に大別する
ことができる。溶液法においては通常ビスフェノール類
とフオスゲンを塩素化炭化水素の存在下に反応させるこ
とによつてポリカーボネートの重合が行なわれ、得られ
たポリカーボネートの塩素化炭化水素溶液は水洗工程、
固化粉末化工程を経て、必要によつては非溶剤或は貧溶
剤による処理工程を経て、最後に乾燥工程を経ることに
よつてポリカーボネートの粉末に仕上げられる。ペレッ
ト化は、この粉末ポリカーボネートを押出機で溶融し、
スレツド状に押出して、切断することによつて行なわれ
る。本発明者はこれら一連の製造工程について詳細な検
討を行なつた結果、粉末ポリカーボネートを押出機で溶
融し、スレツド状に押出し、ペレットに切断する工程に
おいて、得られるペレットの色相が、粉末ポリカーボネ
ートの塩素含有量によつて変動すること、更に詳しく説
明するならば、塩素含有量が約０．００５重量％以下の
粉末ポリカーボネートから得られたペレットが殆んど無
色であるのに対して、塩素含有量が０．００５重量％よ
り多くなるに従つて得られるペレットの色相は淡黄色か
ら茶色へと濃色化すること。そして、粉末ポリカーボネ
ート中には微量の重合反応中に生じたクロロホーメート
、及び少量の重合反応において使用した塩素化炭化水素
が常に残留しており、これらの塩素が溶融ポリカーボネ
ートの色相、ひいてはペレットの色相を悪化させている
ことをつきとめた。従つてほとんど無色のペレットを得
るためには、塩素化炭化水素およびクロロホーメートを
極力除去して、塩素含有量が、０．００５重量％以下の
粉末ポリカーボネートを製造することが必要になるが、
ポリカーボネート中に残存する微量のクロロホーメート
を完全に分解除去するためには、クロロホーメート分解
触媒による精製を要し、又残留する塩素化炭化水素を塩
素含有量が０．００５重量％以下になる迄除去するため
には塩素を含まない溶剤による抽出製精或は長時間の真
空乾燥等の工程を要するなど、経済性を無視して行う実
験においては実現可能であつても、経済性を重視する工
業的製法においては極めて実施困難な工程を必要とする
。本発明者は前記の如き実施困難な工程を使用せずに、
比較的容易に製造できる塩素含有量約０．００５〜０．
２重量％の粉末ポリカーボネートから無色のペレットを
製造する方法について鋭意検討を重ねた結果、特定のリ
ン酸エステルの添加が極めて有効であることを見出して
本発明に到達した。Polycarbonate manufacturing methods can be roughly divided into solution methods and melt methods. In the solution method, polycarbonate is usually polymerized by reacting bisphenols and phosgene in the presence of a chlorinated hydrocarbon, and the resulting chlorinated hydrocarbon solution of polycarbonate is washed with water,
After going through a solidification and powdering process, optionally a treatment process with a non-solvent or a poor solvent, and finally a drying process, it is finished into polycarbonate powder. Pelletization involves melting this powdered polycarbonate using an extruder.
This is done by extruding it into threads and cutting them. The inventor of the present invention has conducted a detailed study on a series of manufacturing processes, and has found that in the process of melting powdered polycarbonate using an extruder, extruding it into threads, and cutting it into pellets, the hue of the resulting pellets is different from that of powdered polycarbonate. To explain in more detail, pellets obtained from powdered polycarbonate with a chlorine content of about 0.005% by weight or less are almost colorless, whereas chlorine-containing pellets are almost colorless. As the amount exceeds 0.005% by weight, the hue of the pellets obtained should deepen from pale yellow to brown. Furthermore, a small amount of chloroformate generated during the polymerization reaction and a small amount of chlorinated hydrocarbon used in the polymerization reaction always remain in the powdered polycarbonate, and these chlorines affect the hue of the molten polycarbonate and, ultimately, the pellets. It was discovered that the hue was worsening. Therefore, in order to obtain almost colorless pellets, it is necessary to remove chlorinated hydrocarbons and chloroformates as much as possible to produce powder polycarbonate with a chlorine content of 0.005% by weight or less.
In order to completely decompose and remove trace amounts of chloroformate remaining in polycarbonate, purification using a chloroformate decomposition catalyst is required, and the remaining chlorinated hydrocarbons must be reduced to a chlorine content of 0.005% by weight or less. In order to completely remove chlorine, extraction and purification using a chlorine-free solvent or long-term vacuum drying are necessary, and even if it is possible to do so in experiments conducted without considering economic efficiency, The industrial manufacturing method that is emphasized requires a process that is extremely difficult to implement. The present inventor has achieved the following without using the difficult steps described above.
The chlorine content is approximately 0.005 to 0.00, which can be produced relatively easily.
As a result of extensive research into a method for producing colorless pellets from 2% by weight powdered polycarbonate, the present invention was achieved by discovering that the addition of a specific phosphoric acid ester is extremely effective.
すなわち本発明は塩素０．００５〜０．２重量％を含む
ポリカーボネート１００重量部当り０．０５〜０．１重
量部のメチルリン酸エステルを添加混合して、熔融成形
することを特徴とする改善された色相を有するポリカー
ボネート成形物の製造方法である。従来ポリカーボネー
トの色相改良の目的に対しては、亜リン酸エステル類、
ホスフイン類等の還元性を有する３価のリン化合物が主
として使用されており、還元性を有しない５価のリン化
合物であるリン酸エステルにおいては、水分による分子
量低下防止（英国特許第１，０１９，６７４号明細書参
照）ジアリール燐酸エステルまたはモノアリール燐酸エ
ステルによる着色ポリカーボネートの劣化防止（特公昭
４７年第１３５３８号公報参照）ポリカーボネート中の
芳香族の水素原子を一部ハロゲン原子で置換した難燃化
ポリカーボネートに対して０．１〜５重量％という多量
の使用例（特開昭５０年第５１１５４号公報参照）を除
けば、少量の塩素による色相変化を防止する目的で使用
することは知られていない。That is, the present invention is an improved method characterized by adding and mixing 0.05 to 0.1 parts by weight of methyl phosphoric acid ester per 100 parts by weight of polycarbonate containing 0.005 to 0.2% by weight of chlorine, and melt-molding the mixture. This is a method for producing a polycarbonate molded article having a different hue. Conventionally, for the purpose of improving the hue of polycarbonate, phosphite esters,
Trivalent phosphorus compounds with reducing properties such as phosphines are mainly used, and phosphoric acid esters, which are pentavalent phosphorus compounds without reducing properties, are used to prevent molecular weight reduction due to moisture (British Patent No. 1,019 , No. 674 specification) Prevention of deterioration of colored polycarbonate using diaryl phosphate ester or monoaryl phosphate ester (see Japanese Patent Publication No. 13538 of 1972) Flame retardant in which aromatic hydrogen atoms in polycarbonate are partially replaced with halogen atoms Except for examples of its use in large amounts of 0.1 to 5% by weight based on chlorinated polycarbonate (see Japanese Patent Laid-Open No. 51154 of 1970), it is not known that it is used for the purpose of preventing hue changes caused by small amounts of chlorine. Not yet.
しかも前記の例に於ては、メチルリン酸エステルは熱分
解時にオレフインを出しえないことか、低沸点である等
の理由によつて実質的に効果を奏されないとされていた
ものである。本発明で使用されるポリカーボネートは酸
受容体と塩素化炭化水素の存在下に２価フエノールとホ
スゲンを反応させる溶液法で製造される。Moreover, in the above-mentioned examples, methyl phosphate ester was considered to be substantially ineffective due to its inability to release olefins during thermal decomposition or its low boiling point. The polycarbonate used in the present invention is produced by a solution method in which dihydric phenol and phosgene are reacted in the presence of an acid acceptor and a chlorinated hydrocarbon.
２価フエノール化合物としてはビスフエノール類が好ま
しく、特に２，２−ビス（４−ヒドロキシフニニル）プ
ロパン（以下ビスフエノールＡと記す）が好ましい。As the divalent phenol compound, bisphenols are preferable, and 2,2-bis(4-hydroxyfynyl)propane (hereinafter referred to as bisphenol A) is particularly preferable.
またビスフエノールＡの一部又は全部を他の２価フエノ
ール化合物で置換してもよい。ビスフエノール以外の２
価フエノール化合物は、例えばハイドロキノン、４，４
′−ジヒドロキシジフエニル、ビス（４−ヒドロキシフ
エニル）アルカン、ビス（４−ヒドロキシフエニル）シ
クロアルカン、ビス（４−ヒドロキシフエニル）スルフ
イド、ビス（４−ヒドロキシフエニル）スルホン、ビス
（４−ヒドロキシフエニル）スルホキシド、ビス（４−
ヒドロキシフエニル）エーテルの如き化合物である。こ
れら２価フエノールのホモポリマー又は２種以上のコポ
リマーあるいはこれらのブレンド物であつてもよい。重
合反応の際に用いられる塩素化炭化水素とはメチレンク
ロライド、エチレンクロライドの如き脂肪族系の塩素化
物である。Further, part or all of bisphenol A may be replaced with another divalent phenol compound. 2 other than bisphenols
Examples of phenolic compounds include hydroquinone, 4,4
'-dihydroxydiphenyl, bis(4-hydroxyphenyl)alkane, bis(4-hydroxyphenyl)cycloalkane, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)sulfone, bis(4-hydroxyphenyl)sulfone -hydroxyphenyl) sulfoxide, bis(4-
hydroxyphenyl) ether. It may be a homopolymer or a copolymer of two or more of these dihydric phenols, or a blend thereof. The chlorinated hydrocarbon used in the polymerization reaction is an aliphatic chlorinated product such as methylene chloride and ethylene chloride.
本発明に用いられるメチルリン酸エステルは普通にはメ
チノールとリン化合物との反応によつて得られる化合物
である。The methyl phosphate ester used in the present invention is usually a compound obtained by the reaction of methyleneol and a phosphorus compound.
即ちリン酸トリメチル、リン酸ジメチル、リン酸モノメ
チルであるがこれらの一種または２種以上の混合物を使
用してもよい。特に好ましくはリン酸トリメチルである
。その添加混合量はポリカーボネート１００重量部当り
、０．００５〜０．１重量部であるが特に好ましくは０
．００５〜０．０３重量部である。０．００５重量部未
満の添加混合では安定剤としての効果を発現しない。That is, trimethyl phosphate, dimethyl phosphate, and monomethyl phosphate may be used alone, or a mixture of two or more thereof may be used. Particularly preferred is trimethyl phosphate. The amount added is 0.005 to 0.1 part by weight per 100 parts by weight of polycarbonate, but preferably 0.005 to 0.1 part by weight.
．． 0.005 to 0.03 parts by weight. If less than 0.005 parts by weight is added and mixed, the effect as a stabilizer will not be exhibited.
また０．１重量部以上添加混合しても良いが、安定剤と
しての効果は飽和するのでその必要はない。ポリカーボ
ネート樹脂にメチルリン酸エステルを混合するには通常
行なわれる方法が用いられる。Further, 0.1 part by weight or more may be added and mixed, but this is not necessary since the effect as a stabilizer is saturated. A commonly used method is used to mix the methyl phosphate ester with the polycarbonate resin.
精製ポリカーボネートドーブに添加混合した後溶剤を除
去する方法、好ましくはポリカーボネート粉末に直接添
加混合する方法、あるいは高濃度にメチルリン酸エステ
ルを添加混合したいわゆるマスターを製造し、これを他
のポリマーボネート粉末に添加混合する方法が掲げられ
る。またメチルリン酸エステルを添加混合する際にポリ
カーボネートの改質の目的で添加する添加剤例えば着色
剤、難燃剤、可塑剤、充填剤、（例えば炭酸カルシウム
、硅藻土、カオリン、カーボンブラツク、ガラスフアイ
バ一など）を添加することもできる。A method of adding and mixing to purified polycarbonate dove and then removing the solvent, preferably a method of directly adding and mixing to polycarbonate powder, or a method of producing a so-called master in which methyl phosphate ester is added and mixed at a high concentration, and this is mixed with other polymer carbonate powders. A method of adding and mixing is mentioned. Additives added for the purpose of modifying polycarbonate when adding and mixing methyl phosphate ester, such as colorants, flame retardants, plasticizers, fillers, (such as calcium carbonate, diatomaceous earth, kaolin, carbon black, glass fiber), etc. 1, etc.) may also be added.
また、ポリカーボネート・に対して例えばポリエチレン
、ポリプロピレン、ポリスチレン、ポリメチルメタアク
リレート、ＡＳ樹脂、ＡＳＢ樹脂、各種合成ゴム、ポリ
エステル、ポリアミド、ポリフエニレンオキサイド等の
他の樹脂を混合してもよい。これらの混合物は射出成形
、押出成形、圧縮成形、吹込成形、回転成形等の溶融成
形法によつて種々の形に成形される。Further, other resins such as polyethylene, polypropylene, polystyrene, polymethyl methacrylate, AS resin, ASB resin, various synthetic rubbers, polyester, polyamide, and polyphenylene oxide may be mixed with the polycarbonate. These mixtures are molded into various shapes by melt molding methods such as injection molding, extrusion molding, compression molding, blow molding, and rotational molding.
ペレツトも未発明方法の成形物の一形態である。本発明
方法により製造された成形品は優れた色相を有しており
、着色品もまた鮮明な色相を有し、本発明方法によつて
製造されたペレツトから成形された製品もまた優美な外
観を有するものである。以下に実施例を挙げて本発明方
法を詳述する。Pellets are also a form of molding of the uninvented process. The molded products produced by the method of the present invention have excellent hues, the colored products also have vivid hues, and the products molded from the pellets produced by the method of the present invention also have an elegant appearance. It has the following. The method of the present invention will be explained in detail with reference to Examples below.
実施例１〜３、比較例１０．０３％の塩素を含有するポ
リカーボネート粉末（商品名、Ｌ−１２５０Ｐ、帝人化
成製）にリン酸トリメチルを第１表記載の割合で添加し
、スーパーミキサーで充分に混合した後、３０ｍｕφ押
出機を使用して２６０℃でスレツドを押出し、カツタ一
で切断してペレツト化した。Examples 1 to 3, Comparative Example 1 Trimethyl phosphate was added to polycarbonate powder containing 0.03% chlorine (trade name: L-1250P, manufactured by Teijin Chemicals) in the proportions shown in Table 1, and the mixture was thoroughly mixed with a super mixer. After mixing, threads were extruded at 260° C. using a 30 muφ extruder and cut into pellets using a cutter.
得られたペレツトの色相をカラーマシン社製色差計で測
定した結果を第１表に示した。比較のためにリン酸トリ
メチルを添加しないほかは、実施例と同様にして得た結
果も、第１表に示した。参考例 １
実施例１〜３で使用したと同じポリカーボネート粉末を
１１０℃、３０１ｔｍＨｇの真空乾燥器で７２時間乾燥
したところ、塩素含有量は０．００１％になつた。The hue of the pellets obtained was measured using a color difference meter manufactured by Color Machine Co., Ltd. The results are shown in Table 1. For comparison, the results obtained in the same manner as in the example except that trimethyl phosphate was not added are also shown in Table 1. Reference Example 1 When the same polycarbonate powder used in Examples 1 to 3 was dried in a vacuum dryer at 110° C. and 301 tmHg for 72 hours, the chlorine content became 0.001%.
これを実施例１〜３と同様にしてペレツト化し、色相を
測定してＬ６４．５、ａ−１．３ｂ３．２の値を得た。
実施例４、比較例２
実施例１〜３で使用したと同じポリカーボネート粉末１
００重量部当りリン酸トリメチルを０．０２部の割合で
添加した混合物を３００℃で射出成形して厚さ２ｍＩの
見本板を作り、そのｂ値を測定した。This was pelletized in the same manner as in Examples 1 to 3, and the hue was measured to obtain values of L64.5, a-1.3b3.2.
Example 4, Comparative Example 2 Same polycarbonate powder 1 as used in Examples 1 to 3
A sample plate having a thickness of 2 mI was prepared by injection molding a mixture to which trimethyl phosphate was added at a ratio of 0.02 part per 00 parts by weight at 300°C, and its b value was measured.
また比較のために、リン酸トリメチルを添加せずに成形
して得た見本板のｂ値も測定した。それらの結果を第２
表に示した。実施例５，６、比較例５〜９
実施例１で使用したと同じポリカーボネート粉末１００
重量部当り第３表に示すリン酸エステルを同表記載の割
合で添加し、スーパーミキサーで充分混合後、実施例４
と同様に成形して見本板を作り、そのｂ値及び平均分子
量を測定した。For comparison, the b value of a sample plate obtained by molding without adding trimethyl phosphate was also measured. those results as a second
Shown in the table. Examples 5 and 6, Comparative Examples 5 to 9 Same polycarbonate powder 100 as used in Example 1
The phosphoric acid esters shown in Table 3 per part by weight were added in the proportions shown in the table, and after thorough mixing with a super mixer, Example 4 was prepared.
A sample plate was made by molding in the same manner as above, and its b value and average molecular weight were measured.
Claims (1)
ゲンを含有しないポリカーボネート１００重量部当り、
０．００５〜０．１重量部のメチルリン酸エステル添加
混合して溶融成形することを特徴とする改善された色相
を有するポリカーボネート成形物の製造方法。1 per 100 parts by weight of polycarbonate containing 0.005 to 0.2% by weight of chlorine and containing no nuclear substituted halogen,
A method for producing a polycarbonate molded article having an improved hue, the method comprising adding and mixing 0.005 to 0.1 part by weight of methyl phosphoric acid ester and melt-molding the product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12633075A JPS5922743B2 (en) | 1975-10-22 | 1975-10-22 | Method for producing polycarbonate moldings with improved hue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12633075A JPS5922743B2 (en) | 1975-10-22 | 1975-10-22 | Method for producing polycarbonate moldings with improved hue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5250348A JPS5250348A (en) | 1977-04-22 |
| JPS5922743B2 true JPS5922743B2 (en) | 1984-05-29 |
Family
ID=14932506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12633075A Expired JPS5922743B2 (en) | 1975-10-22 | 1975-10-22 | Method for producing polycarbonate moldings with improved hue |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5922743B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0188842U (en) * | 1987-12-03 | 1989-06-12 | ||
| US5973101A (en) * | 1997-09-30 | 1999-10-26 | General Electric Company | Aromatic polycarbonate resin composition |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6081245A (en) * | 1983-10-13 | 1985-05-09 | Idemitsu Petrochem Co Ltd | Polycarbonate resin composition |
| JPS61287954A (en) * | 1985-06-14 | 1986-12-18 | Teijin Chem Ltd | Polycarbonate resin composition |
-
1975
- 1975-10-22 JP JP12633075A patent/JPS5922743B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0188842U (en) * | 1987-12-03 | 1989-06-12 | ||
| US5973101A (en) * | 1997-09-30 | 1999-10-26 | General Electric Company | Aromatic polycarbonate resin composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5250348A (en) | 1977-04-22 |
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