CN104893537B - A kind of production technology of the aqueous polyurethane coating with high tensile force coated film - Google Patents
A kind of production technology of the aqueous polyurethane coating with high tensile force coated film Download PDFInfo
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Abstract
The invention discloses a kind of production technology of the aqueous polyurethane coating with high tensile force coated film, described production technology is with polyethers, PEPA and isocyanates as raw material, during the course of the reaction, it is gradually added hydrophilic chain extender, after being reacted to up to theoretical NCO% values, glycol dimethyl ether acetone mixed solvent or diethylene glycol dimethyl ether acetone mixed solvent are added, salt, emulsifying and chain extension is eventually passed into and is obtained product；In the product that the present invention is obtained, the position of hydrophilic radical distribution is compared with traditional handicraft, distributed more widely in strand, is not only distributed in the performed polymer end of the chain, while being also distributed in chain, further increases the hydrophilic efficiency of hydrophilic group；Construction featuress according to performed polymer strand, have selected two kinds of dicyandiamide solutions simultaneously.The dicyandiamide solution can dramatically increase the percentage elongation after aqueous polyurethane coating film forming and tensile force, and dicyandiamide solution is good with the compatibility of water-based emulsion, and stability is high.
Description
Technical field
The present invention relates to the production technology field of water paint, more particularly to a kind of water with high tensile force coated film
The production technology of property polyurethane coating.
Background technology
Polyurethane is the abbreviation of polyurethanes.It is a kind of macromolecular compound, is characterized in dividing in polymer chain
There are the carbamate groups of repetition in minor structure（-NHCOO-）.
Aqueous polyurethane system diisocyanate and dihydroxylic alcohols etc. carry out polycondensation reaction and generate the pre-polymerization that two ends are all-NCO
After body, then it is embedded in polyurethane molecular chain as chain extender with the diamidogen for being connected to hydrophilic acidic group；According to reaction original used
Material functional group number purpose is different, can make line style or three-dimensional-structure.Hydrophilic group is introduced in the performed polymer generated due to reaction,
A certain degree of hydrophilic is made it have, then into emulsifying salt, aqueous polyurethane, also referred to as polyurethane aqueous in being dispersed to water, is made
A prose style free from parallelism.With it is nontoxic, do not fire, it is not quick-fried, environmentally friendly the features such as.
Polyurethane becomes the wide macromolecular material of purposes from after inventing, and can be made into the product for coming in every shape,
It is the polymer of a kind of " tailorable " " omnipotent ".
It is domestic still generally poly- using traditional organic solvent type currently used for the finishing agent on the surfaces such as synthetic leather, textile
, used as main raw material(s), solvent borne polyurethane is poisonous, inflammable, easy containing 70% toluene, dimethylbenzene, DMF, butanone, butanol etc. for urethane
Quick-fried harmful substance, so cause the murder by poisoning to human body, the pollution, security incident and occupation disease to environment takes place frequently.
It is due to when aqueous polyurethane is synthesized, not using DMF, toluene, MEK equal solvents therefore nuisanceless, with not
Combustion, safe and environment-friendly special performance and it is nontoxic, pollution-free the advantages of, the environmental requirement without V DEG C of discharge, therefore water can be met
Property polyaminoester emulsion is increasingly taken seriously；Modernization industry developed country is using waterborne polyurethane resin replacing solvent
Polyurethane is produced.
Aqueous polyurethane emulsion is due to good combination property, being widely used in clothing, footwear industry, suitcase, family at present
Front yard articles for use and the field such as furniture, automobile and means of transportation and textile auxiliary, paper-making industry auxiliary agent, coating and binding agent.By adopting
With HDI, IPDI, H12The isocyanates such as MDI are raw material, it is possible to obtain do not turned yellow, Series of High Strength, polyethers is water-fast series, polyester
Series and bi-component and one pack system cover with paint, lacquer, colour wash, etc. agent series products so that aqueous polyurethane can meet leather, textile, furniture, print
The Production requirement of the different industries such as brush.Fine and smooth, plentiful product feel, high gloss, waterproof and permeability are given simultaneously good etc.
Various features.
The aqueous polyurethane used in synthetic leather production, leather surface processing procedure, its good film-forming property are firmly bonded, and apply
Acidproof, alkaline-resisting, water-fast, cold-resistant, wear-resisting, the resistance to flexion of layer, moisture-inhibiting, breathability are strong, high resilience, made by finished product good hand feeling,
Quality is soft, comfortable, grade that is can greatly improving synthetic leather, leather.But compared with external leather finishing agent, most domestic is produced
The shortcomings of product still suffer from brightness, fastness, not high Bearable dry and wet wipe grade.
Additionally, aqueous polyurethane is widely used in textile as coating agent, finishing agent.As fabric
Coating, strong covering power good with filming performance, bonding are firmly, coating luminous, washable, wear-resisting, tall and straight, wrinkle resistant, good hand touch, anti-
The characteristics of water, raising dyeability and strong resistance to wet rubbing ability；Fabric sofetening, plentiful feel can be given, improved fabric abrasion resistance, resisted
Wrinkle property, resilience, permeability and thermostability etc..
The content of the invention
For above-mentioned problem, present invention aim at provide a kind of with high tensile force coated film, it is alternative
The aqueous, environmental protective polyurethane coating preparation technology of conventional leather, weaving face fabric surface coating.Hydrophilic radical distribution in the technique
Position compared with traditional handicraft, it is distributed more widely in strand, be not only distributed in the performed polymer end of the chain, while being also distributed in
In chain, the hydrophilic efficiency of hydrophilic group is further increased；Construction featuress according to performed polymer strand, have selected two kinds simultaneously
Dicyandiamide solution.The dicyandiamide solution can dramatically increase the percentage elongation after aqueous polyurethane coating film forming, tensile force, and solvent body
System is good with the compatibility of water-based emulsion, and emulsion intercalation method is high..
In order to achieve the above object, the technical solution used in the present invention is as follows：It is a kind of with high tensile force coated film
The production technology of aqueous polyurethane coating, described production technology were being reacted with polyether polyol and isocyanates as raw material
Cheng Zhong, is gradually added hydrophilic chain extender, after being reacted to up to theoretical NCO% values, adds glycol dimethyl ether-acetone mixing molten
Agent or diethylene glycol dimethyl ether-acetone mixed solvent, eventually pass into salt, emulsifying and chain extension and obtain product；Its detailed preparation side
Method is as follows：
1）Polymer polyatomic alcohol, hydrophilic chain extender are added into reaction bulb, after heated and stirred, isocyanates is added,
It is cooled to 70 DEG C of 25～35min of reaction；
2）After adding small molecule chain extender, 80 DEG C of 25～35min of reaction are warming up to；
3）Hydrophilic chain extender is added again, rises high reaction temperature to 85 DEG C of 25～35min of reaction；
4）After reaction system reaches theoretical NCO% values 3.94%, glycol dimethyl ether-acetone mixed solvent or two sweet is added
Diethylene glycol dimethyl ether-acetone mixed solvent, is cooled to 30～40 DEG C, is eventually adding nertralizer into salt and deionized water high-speed stirred point
Dissipate, under conditions of chain extender hydrazine hydrate, chain extension obtains product.
In course of reaction of the present invention, the mass fraction of raw material is：Polymer polyatomic alcohol：Hydrophilic chain extender：Isocyanide
Acid esters：Small molecule chain extender 70：5～7.2：30～39：3～5.1, wherein glycol dimethyl ether-acetone mixed solvent or two sweet
The ratio of diethylene glycol dimethyl ether-acetone mixed solvent is 1:1～5.
Glycol dimethyl ether-acetone mixed solvent of the present invention is preferably in a proportion of 1:1.5, described diethylene glycol
Dimethyl ether-acetone mixed solvent is preferably in a proportion of 1:1.
Isocyanates of the present invention are toluene di-isocyanate(TDI) (TDI), hexamethylene diisocyanate (HDI), benzene
One or more diisocyanate in dimethylene diisocyanate (XDI), isophorone diisocyanate (IPDI) with appoint
The combination of meaning ratio.
Polyhydric alcohol of the present invention is polyether-type and polyester polyol；Specially polyether polyol PTMG-2000 and
One or more in 10PE27 glycol, PCDL, polyadipate -1,4- butyl glycol ester diols are polynary
Alcohol is with the combination of arbitrary proportion.
Small molecule chain extender of the present invention is small molecule dihydroxylic alcohols, and specially BDO, ethylene glycol and two are sweet
Alcohol.
Hydrophilic chain extender of the present invention is dihydromethyl propionic acid (DMPA), dimethylolpropionic acid (DMBA), 1,4-
One or more chain extenders in butanediol -2- sodium sulfonates are with the combination of arbitrary proportion.
Step 1 of the present invention）With step 3）The amount ratio of middle hydrophilic chain extender is 1.6～6.2:0.7～4.2.
This invention reaction process compared with old technology, due to distribution of the hydrophilic group in performed polymer chain it is wider, coating
Filming performance it is good, and be obviously improved the tensile force of thin film so that intensity increases, pliability is improved；Simultaneously as the degree of polymerization compared with
Height, molecular weight distribution are narrower, have enhanced water resistance feature after film forming, while also meet good hand feeling, the characteristics of comfortable, hence it is evident that change
A series of performances of kind leather, weaving face fabric.Product has water-fastness ultraviolet resistance, color inhibition, Bearable dry and wet wipe, hydrolysis etc.
Feature.
With the carrying out of reaction in the present invention, when the NCO % end point values of reaction designing are close to, compared with old technology, instead
Answer viscosity to significantly increase, disclose performed polymer molecular weight and significantly raise；Subsequently into salt, deionized water dispersion, chain extension after binary amine,
Obtain the waterborne polyurethane resin of solid content 40%.After 72h, product is still creamy white homogeneous phase solution, shows the controllability of reaction
Well.New reaction process not only increases adhesive force of the polyurethane coating to base material, while and realizing with high tensile force
Waterborne polyurethane film purpose.
It is an advantage of the current invention that：In the present invention hydrophilic radical in performed polymer chain be distributed in chain in and the end of the chain, most
The hydrophilic efficiency of hydrophilic radical is improve big degree.The molecular weight of performed polymer is the method increased, performed polymer point is increased
The length of subchain, so as to enhance the tensile strength of coated film.When the reaction later stage is measured by sampling NCO content, substantially can see
Observe the viscosity increase phenomenon of reaction system.It is distributed more widely due to hydrophilic radical so that the solid content of water-based emulsion is obvious
Improve, improved to 40% by the 30% of former reaction process.
Present invention uses the solvent combination system of novelty：Glycol dimethyl ether-acetone mixed solvent（Solvent orange 2 A system）With
Diethylene glycol dimethyl ether-acetone mixed solvent（Solvent B systems）.Such solvent combination system reaction terminate add nertralizer into
Add before salt, reduce system viscosity.The water-based emulsion obtained into after salt, dispersion, rear chain extension is stable, shows A, B dicyandiamide solution
The compatibility with aqueous polyurethane emulsion is good.Selected A, B dicyandiamide solution is conducive to the stretching, extension of strand, significantly enhances
The tensile strength of coated film.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail.
Embodiment 1：50 parts of polyether polyol PTMG-2000 of addition, polyadipate -20 parts of BDO esterdiol,
1.6 parts of dimethylolpropionic acid (DMBA) after being heated to 78 DEG C, adds toluene di-isocyanate(TDI) (TDI) 31 into reaction bulb
Part, it is cooled to 70 DEG C and continues reaction 25min；Add 1,4- butanediols（BDO）（Small molecule chain extender species is variable, is shown in Table one）
After 4.3 parts, 80 DEG C are warming up to, and are incubated 25min；4.0 parts of dimethylolpropionic acid (DMBA) is subsequently added again, and improves anti-
Temperature is answered to 85 DEG C of holding 25min；NCO % values are measured by sampling, such as not up to theoretical value, then 90 DEG C is warming up to；Reach theory
After NCO % values, glycol dimethyl ether-acetone mixed solvent is added（Solvent orange 2 A system）Reaction system viscosity is reduced, and is cooled to
30-40 DEG C, 3.2 parts of nertralizer triethylamine is added, into salt 15 minutes；After adding the dispersion of deionized water high-speed stirred, after addition
Chain extender hydrazine hydrate chain extension obtains product.
Table one：1 formula of embodiment is constituted
Embodiment 2：50 parts of polyether polyol PTMG-2000 of addition, 20 parts of 10PE27 glycol, Isosorbide-5-Nitrae-
3.0 parts of butanediol -2- sodium sulfonates after being heated to 78 DEG C, add hexamethylene diisocyanate (HDI) 30 into reaction bulb
Part, it is cooled to 70 DEG C and continues reaction 30min；Add 1,4- butanediols（BDO）（Small molecule chain extender species is variable, with one phase of table
Closely）After 4.3 parts, 80 DEG C are warming up to, and are incubated 30 min；4.2 parts of BDO -2- sodium sulfonates are subsequently added again, and are carried
High reaction temperature keeps 30 min to 85 DEG C；NCO % values are measured by sampling, such as not up to theoretical value, then 90 DEG C is warming up to；Reach
After theoretical NCO % values, glycol dimethyl ether-acetone mixed solvent is added（Solvent orange 2 A system）Reaction system viscosity is reduced, and is lowered the temperature
To 30-40 DEG C, 3.2 parts of nertralizer triethylamine is added, into salt 15 minutes；After adding the dispersion of deionized water high-speed stirred, add
Rear chain extender hydrazine hydrate chain extension obtains product.
Embodiment 3：Add 50 parts of polyether polyol PTMG-2000,20 parts of PCDL 980R, dihydroxy first
Base propanoic acid（DMPA）2.9 parts, into reaction bulb, after being heated to 78 DEG C, add XDI (XDI) 33
Part, it is cooled to 70 DEG C and continues reaction 35min；Add 1,4- butanediols（BDO）（Small molecule chain extender species is variable, with one phase of table
Closely）After 3 parts, 80 DEG C are warming up to, and are incubated 35min；Subsequently dihydromethyl propionic acid is added again（DMPA）2.1 parts, and improve anti-
Temperature is answered to 85 DEG C of holding 35min；NCO % values are measured by sampling, such as not up to theoretical value, then 90 DEG C is warming up to；Reach theory
After NCO % values, glycol dimethyl ether-acetone mixed solvent is added（Solvent orange 2 A system）Reaction system viscosity is reduced, and is cooled to
30-40 DEG C, 3.2 parts of nertralizer triethylamine is added, into salt 15 minutes；After adding the dispersion of deionized water high-speed stirred, after addition
Chain extender hydrazine hydrate chain extension obtains product.
Embodiment 4：Add 50 parts of polyether polyol PTMG-2000,20 parts of PCDL 980R, dihydroxy first
Base propanoic acid（DMPA）3.6 parts, into reaction bulb, after being heated to 78 DEG C, add isophorone diisocyanate (IPDI) 39
Part, it is cooled to 70 DEG C and continues reaction 32min；Add 1,4- butanediols（BDO）（Small molecule chain extender species is variable, is shown in Table two）
After 4.3 parts, 80 DEG C are warming up to, and are incubated 32min；Subsequently dihydromethyl propionic acid is added again（DMPA）1.4 parts, and improve anti-
Temperature is answered to 85 DEG C of holding 32min；NCO % values are measured by sampling, such as not up to theoretical value, then 90 DEG C is warming up to；Reach theory
After NCO % values, diethylene glycol dimethyl ether-acetone mixed solvent is added（Solvent B systems）Reaction system viscosity is reduced, and is cooled to
30-40 DEG C, 3.2 parts of nertralizer triethylamine is added, into salt 15 minutes；After adding the dispersion of deionized water high-speed stirred, after addition
Chain extender hydrazine hydrate chain extension obtains product.
Table two：4 formula of embodiment is constituted
Embodiment 5：50 parts of polyether polyol PTMG-2000 of addition, 20 parts of 10PE27 glycol, Isosorbide-5-Nitrae-
6.2 parts of butanediol -2- sodium sulfonates after being heated to 78 DEG C, add 31 parts of toluene di-isocyanate(TDI) (TDI) into reaction bulb,
It is cooled to 70 DEG C and continues reaction 30min；Add 1,4- butanediols（BDO）（Small molecule chain extender species is variable, close with table two）
After 5.1 parts, 80 DEG C are warming up to, and are incubated 30min；1.0 parts of BDO -2- sodium sulfonates are subsequently added again, and improve anti-
Temperature is answered to 85 DEG C of holding 30min；NCO % values are measured by sampling, such as not up to theoretical value, then 90 DEG C is warming up to；Reach theory
After NCO % values, diethylene glycol dimethyl ether-acetone mixed solvent is added（Solvent B systems）Reaction system viscosity is reduced, and is cooled to
30-40 DEG C, 3.2 parts of nertralizer triethylamine is added, into salt 15 minutes；After adding the dispersion of deionized water high-speed stirred, after addition
Chain extender hydrazine hydrate chain extension obtains product.
Comparative example 1:Add 50 parts of polyether polyol PTMG-2000,20 parts of PCDL 980R is to anti-
In answering bottle, after being heated to 60 DEG C, 39 parts of isophorone diisocyanate (IPDI) is added, reacted 30 minutes or so；It is warming up to
70 DEG C, continue reaction 30min；Add 1,4- butanediols（BDO）（Small molecule chain extender species is variable, is shown in Table three）After 4.3 parts,
80 DEG C are warming up to, and are incubated 30min；Add dihydromethyl propionic acid（DMPA）After 5 parts are reacted 30 minutes, NCO % are measured by sampling
Value, such as not up to theoretical value, then be warming up to 90 DEG C；After reaching theoretical NCO % values, acetone is added to reduce reaction system viscosity, and
30-40 DEG C is cooled to, 3.2 parts of nertralizer triethylamine is added, into salt 15 minutes；After adding the dispersion of deionized water high-speed stirred,
Rear chain extender hydrazine hydrate chain extension is added to obtain product.
Table three：1 formula of comparative example is constituted
Comparative example 2：50 parts of polyether polyol PTMG-2000 of addition, 20 parts of PCDL 980R, two
Hydroxymethyl propionic acid（DMPA）4.3 parts, into reaction bulb, after being heated to 78 DEG C, add 31 parts of toluene di-isocyanate(TDI) (TDI),
It is cooled to 70 DEG C and continues reaction 30min；Add 1,4- butanediols（BDO）（Small molecule chain extender species is variable, close with table three）
After 4.3 parts, 80 DEG C are warming up to, and are incubated 30min；Subsequently dihydromethyl propionic acid is added again（DMPA）0.7 part, and improve anti-
Temperature is answered to 85 DEG C of holding 30min；NCO % values are measured by sampling, such as not up to theoretical value, then 90 DEG C is warming up to；Reach theory
After NCO % values, add acetone to reduce reaction system viscosity, and be cooled to 30-40 DEG C, add 3.2 parts of nertralizer triethylamine, into
Salt 15 minutes；After adding the dispersion of deionized water high-speed stirred, rear chain extender hydrazine hydrate chain extension is added to obtain product.
Performance test：Take after stable aqueous polyurethane emulsion coats mirror surface centrifugal paper, put 120 DEG C of convection ovens
Middle drying, obtains polyurethane coating thin film（The thickness of test film is 0.09 mm）；Thin film profile is cut out as dumb-bell shape after 48h
Carry out tensile strength testing（The speed of service：400 mm/min）；Alkali resistance testing experiment is carried out during thin film to be soaked in 5% alkali liquor.
1）Alkaline resistance test test result shows, the polyurethane film that present invention process is prepared 5% alkaline solution
In, after immersion 72h, without significant change；And under thin film equal conditions prepared by common process, it is swelling, turn white.
2）Tensile force is carried out using universal material test machine (Mei Tesi microcomputers control CMT6104 type electronic universal testers)
Test, as a result shows the mechanical property after coating film forming prepared by present invention process.Compared with old technology formula thin film, Hou Zhe
Thin film stretching force intensity, percentage elongation and mold measure have significant change（See Figure and table）.
Wherein
The present invention is taken in batches progressively during polyethers, PEPA and isocyanates are synthesized performed polymer
Add hydrophilic chain extender（Such as DMPA etc.）Strategy, realize that hydrophilic radical is distributed in the middle of performed polymer strand and strand
The purpose at end.And by many experiments, carry out condition optimizing, obtain a kind of new reaction method；The experimental technique can be effectively real
The now control to polyreaction, due to adopting the New Policy for being dividedly in some parts hydrophilic chain extender so that hydrophilic group in performed polymer chain
That what is rolled into a ball is distributed more widely, while also effectively increasing performed polymer chain length, improves the molecular weight of performed polymer.Experimental result test data
（See polyurethane film tensile strength testing figure）Show, the coating film stretching maximum, force for being dividedly in some parts aqueouss chain extender strategy is taken than former
Reaction process is significantly improved.Simultaneously because hydrophilic radical is distributed more widely so that the solid content of water-based emulsion is significantly improved, by
The 30% of former reaction process is improved to 40%.
Take be dividedly in some parts hydrophilic chain extender it is tactful while, according to the construction featuress of performed polymer chain, in reaction
When later stage adds solvent to reduce reaction system viscosity, two kinds of novel dicyandiamide solutions, respectively glycol dimethyl ether-the third are added
Ketone mixed solvent（Solvent orange 2 A system）With diethylene glycol dimethyl ether-acetone mixed solvent（Solvent B systems）.Experimental data shows film forming
Afterwards, the stretching maximum, force of film is significantly increased.Reason is the space conformation that this two kinds of dicyandiamide solutions can significantly change strand.Here
In dicyandiamide solution, performed polymer molecular backbone turns to the increase of straight chain conformations trend by coil conformation, and strand spacing diminishes, intermolecular
Active force strengthens, so as to increase tensile strength.In film forming procedure, with the volatilization of moisture, this kind of change becomes apparent from, from
And stretching maximum, force is significantly increased.
Performance comparison test：In the case where other reaction conditions are constant, by changing hydrophilic in step 1 and step 3
Chain extender amount ratio carries out contrast test, and other experiment conditions of wherein comparative example 3,5 are identical with embodiment 4, right
More identical with embodiment 5 than the experiment condition of embodiment 4,6, the result of the test for obtaining is as shown in the table：
In upper table, the test data of experiment of comparative example 3,4 shows, glycol dimethyl ether-acetone mixed solvent（Solvent orange 2 A
System）With diethylene glycol dimethyl ether-acetone mixed solvent（Solvent B systems）The tensile strength of film can be increased, stretching maximum, force shows
Write and improve；Meanwhile, in step 1 and step 3, the amount ratio of hydrophilic chain extender exceeds 1.6～6.2:0.7～4.2 scope
Afterwards, the performance of the final products for obtaining is decreased obviously, and the elongation at break of itself and stretching maximum, force occur to glide,
Have impact on the range of application of final products.
It should be noted that it is above-mentioned be only presently preferred embodiments of the present invention, not for limit the present invention protection model
Enclose, on the basis of above-described embodiment, done equivalents belong to protection scope of the present invention.
Claims (7)
1. a kind of production technology of the aqueous polyurethane coating with high tensile force coated film, it is characterised in that described life
Production. art during the course of the reaction, is gradually added hydrophilic chain extender with polyethers, PEPA and isocyanates as raw material, when
It is reacted to up to after theoretical NCO% values, adds glycol dimethyl ether-acetone mixed solvent or diethylene glycol dimethyl ether-acetone mixing molten
Agent, eventually passes into salt, emulsifying and chain extension and obtains product；Its detailed preparation method is as follows：
1）Polymer polyatomic alcohol, hydrophilic chain extender are added into reaction bulb, after heated and stirred, isocyanates, cooling is added
To 70 DEG C of 25～35min of reaction；
2）After adding small molecule chain extender, 80 DEG C of 25～35min of reaction are warming up to；
3）Hydrophilic chain extender is added again, rises high reaction temperature to 85 DEG C of 25～35min of reaction；
4）After reaction system reaches theoretical NCO% values, add glycol dimethyl ether-acetone mixed solvent or diethylene glycol dimethyl ether-
Acetone mixed solvent, is cooled to 30～40 DEG C, is eventually adding nertralizer and disperses into salt and deionized water high-speed stirred, in chain extender
Under conditions of hydrazine hydrate, chain extension obtains product；
Step 1）With step 3）The amount ratio of middle hydrophilic chain extender is 1.6～6.2:0.7～4.2.
2. there is the production technology of the aqueous polyurethane coating of high tensile force coated film, its feature as claimed in claim 1
It is that the mass fraction of raw material is in described course of reaction：Polymer polyatomic alcohol：Hydrophilic chain extender：Isocyanates：Little point
Sub- chain extender 70：5～7.2：30～39：3～5.1, wherein glycol dimethyl ether-acetone mixed solvent or diethylene glycol dimethyl ether-
The ratio of acetone mixed solvent is 1:1～5.
3. there is the production technology of the aqueous polyurethane coating of high tensile force coated film, its feature as claimed in claim 2
It is that described glycol dimethyl ether-acetone mixed solvent is preferably in a proportion of 1:1.5, described diethylene glycol dimethyl ether-the third
Ketone mixed solvent is preferably in a proportion of 1:1.
4. there is the production technology of the aqueous polyurethane coating of high tensile force coated film, its feature as claimed in claim 1
It is that described isocyanates are toluene di-isocyanate(TDI) (TDI), hexamethylene diisocyanate (HDI), phenylenedimethylidyne two
One or more diisocyanate in isocyanates (XDI), isophorone diisocyanate (IPDI) are with the group of arbitrary proportion
Close.
5. there is the production technology of the aqueous polyurethane coating of high tensile force coated film, its feature as claimed in claim 1
It is that described polyhydric alcohol is polyether-type and polyester polyol；Specially polyether polyol PTMG-2000 and polyadipate second
One or more polyhydric alcohol in glycol esterdiol, PCDL, polyadipate -1,4- butyl glycol ester diols are arbitrarily comparing
The combination of example.
6. there is the production technology of the aqueous polyurethane coating of high tensile force coated film, its feature as claimed in claim 1
It is that described small molecule chain extender is small molecule dihydroxylic alcohols, specially BDO, ethylene glycol, diethylene glycol.
7. there is the production technology of the aqueous polyurethane coating of high tensile force coated film, its feature as claimed in claim 1
It is that described hydrophilic chain extender is dihydromethyl propionic acid (DMPA), dimethylolpropionic acid (DMBA), BDO -2-
One or more chain extenders in sodium sulfonate are with the combination of arbitrary proportion.
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| CN110016281B (en) * | 2019-04-16 | 2021-04-23 | 浙江新诺高分子材料有限公司 | Preparation method and production equipment of high-tensile-force waterborne polyurethane coating |
| WO2022011580A1 (en) * | 2020-07-15 | 2022-01-20 | Dow Global Technologies Llc | Polyester polyol-polyether polyol blend having higher stability and comparibility, and polyurethane material prepared therefrom |
| CN111909367B (en) * | 2020-08-14 | 2022-10-28 | 元利化学集团股份有限公司 | Preparation method of hydrophilic polycarbonate dihydric alcohol |
| CN114381191A (en) * | 2022-01-17 | 2022-04-22 | 江苏第二师范学院 | Hydroxyl silicone oil modified waterborne polyurethane coating with high tensile strength and high water resistance coating film |
| CN115536806B (en) * | 2022-09-28 | 2024-02-09 | 江苏第二师范学院 | Production process of aqueous polyurethane emulsion of ultrahigh-elongation coating film |
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| CN102775578A (en) * | 2012-08-15 | 2012-11-14 | 中国海洋石油总公司 | Cation-nonionic mixed aqueous polyurethane emulsion and preparation method thereof |
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