CN107266651A - A kind of enhancing polyurethane material of heat-resisting ageing-resisting and preparation method thereof - Google Patents
A kind of enhancing polyurethane material of heat-resisting ageing-resisting and preparation method thereof Download PDFInfo
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- CN107266651A CN107266651A CN201710588913.3A CN201710588913A CN107266651A CN 107266651 A CN107266651 A CN 107266651A CN 201710588913 A CN201710588913 A CN 201710588913A CN 107266651 A CN107266651 A CN 107266651A
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Abstract
The present invention relates to macromolecule modified technical field, the enhancing polyurethane material of more particularly to a kind of heat-resisting ageing-resisting and preparation method thereof, the enhancing polyurethane material of the heat-resisting ageing-resisting is made up of the raw material containing following material：PEPA, diisocyanate, chain extender, metal salt, ultra-violet absorber, organic solvent；Fine and close, uniform polyurethane material is formed using metal ion crosslinked polyurethane, while the characteristics of there is heat-resisting, ageing-resistant and good mechanical performance.
Description
Technical field
The present invention relates to macromolecule modified technical field, the enhancing polyurethane material of more particularly to a kind of heat-resisting ageing-resisting
And preparation method thereof.
Background technology
Polyurethane (PU) is formed by diisocyanate or polyisocyanates with dihydroxy or polyol addition polymerization.Poly- ammonia
In ester large molecule in addition to carbamate, also containing groups such as ether, ester, urea, biuret, allophanates.The knot of polyurethane
Structure change is a lot, its performance can be adjusted in a wide range, the species of product is also a lot, such as foam section material products, bullet
Property fibre, Synthetic Leather, coating and adhesive etc..
In the world, the fast development of building field, auto industry, electronic equipment, new energy and environmental protection industry,
The demand of polyurethane products is greatly pulled.Building field is the important Downstream Market of polyurethane, and polyurethane material not only may be used
As New Dwelling building heat preservation, it is also possible to make the renewal and reform of old building, reached relatively even in following polyurethane market
In the case of saturation, still have in building field and greatly increase potential.In field of traffic, the application of polyurethane material is also increasingly
Many, car manufactures very focus on energy-conservation fuel-economizing now, and polyurethane products can not only mitigate the weight of automobile, and can carry
The life cycle of high automobile product.Between following 10 years, application of the polyurethane products in some other field will obtain swift and violent
Development.
But the weatherability of polyurethane is poor, yellowing easily occurs when open air is used, is cracked, has severely impacted the outward appearance of product
And mechanical property.Since polyurethane industrialization, industrial quarters is studying photooxidation and and degradation problem always.Due to polyurethane category
In thermosetting resin, its structure is very big with technique change, and used additive must be compatible with each component of resin, finally into
For a part for resin, this just adds difficulty to the weatherability for studying polyurethane, therefore less on the report of this respect.State
The interior research to this problem is in the starting stage, larger with external gap.
Chinese Polyurethane Industry layout is basically formed, mainly have at present Yangtze River Delta Area centered on Shanghai, with Yantai-
Bohai Rim centered on Zibo-Huanghua-Tianjin, the area of the Pearl River Delta centered on Guangzhou, the northwest centered on Lanzhou
Area, and the polyurethane such as the southwest centered on Chongqing, the Haixi Area centered on Quanzhou, Fujian formed
Industry Agglomeration area.
Polyurethane material is as other high polymer materials, easily by extraneous ring during processing, storage and use
The influence of border such as light, heat, water, air and oxygen, causes polymer degradation with aging so that under product discoloration, embrittlement, mechanical performance
Drop, so that losing use value.Since polyurethane industrialization, researcher is directed to weather-resistant pu material always
Research, but be due to polyurethane material structure change multiterminal, degradation process is complicated, therefore progress is slow.
Ageing-resistant environment-protecting polyurethane foam is widely used in production automobile cushion, backrest, headrest etc..It has ageing-resistant
Performance is good, environmentally friendly scentless feature, and automobile factory commercial city was in improvement environment inside car in recent years, and the control to smell and toxicity is more next
It is stricter；With automobile industry intensified competition, automobile production producer needs to purchase more durable product to improve product competition
Power, while in order to reduce environmental pollution, reducing car owner's fuel oil use cost, automobile making is also sent out towards light-weighted direction
Exhibition；Traditional combination material bin stability is poor, finished product meeting aging after using the several years, it is impossible to meet use demand.
The content of the invention
In view of the shortcomings of the prior art, the present invention proposes a kind of enhancing polyurethane material of heat-resisting ageing-resisting, and it has concurrently resistance to
The characteristics of hot, ageing-resistant and good mechanical performance.
To solve the above problems, the present invention uses following technical scheme：
A kind of enhancing polyurethane material of heat-resisting ageing-resisting, is made up of the raw material containing following material：PEPA, two isocyanides
Acid esters, chain extender, metal salt, ultra-violet absorber, organic solvent.
It is preferred that, the enhancing polyurethane material of the heat-resisting ageing-resisting is made by weight by the raw material containing following material
Into：50 ~ 60 parts of PEPA, 20 ~ 60 parts of diisocyanate, 3 ~ 8 parts of chain extender, 5 ~ 20 parts of metal salt, ultra-violet absorber 3
~ 8 parts.
The present invention to elastic polyurethane by being modified so that elastic polyurethane has heat-resisting, ageing-resistant performance concurrently, this
Also there is good mechanical property outside.
Elastic polyurethane be by made from PEPA and di-isocyanate reaction, according to the difference of raw material type,
The performance of obtained elastic polyurethane is also different, and the present invention does not have special requirement to the species of elastic polyurethane, therefore to original
The species of material is also without special requirement.
The present invention does not have special limitation to the species of PEPA, as long as can be poly- with di-isocyanate reaction generation
Urethane, can be well known to the art personnel, and PEPA can be poly terephthalic acid second two as described
Alcohol, polycaprolactone diols, PEO glycol, polypropylene oxide glycol, polytetrahydrofuran diol, polyadipate ethylene glycol
Esterdiol, polyadipate-BDO esterdiol, the homopolymerization of polyhexamethylene adipate glycol or above-mentioned monomer or copolymerization two
At least one of alcohol.
The present invention does not have special limitation to the species of diisocyanate, as long as can be poly- with PEPA reaction generation
Urethane, can be well known to the art personnel, and diisocyanate is IPDI, four as described
Methylene diisocyanate, hexamethylene diisocyanate, toluene di-isocyanate(TDI), 1,5- naphthalene diisocyanates, diphenylmethyl
At least one of alkane diisocyanate or XDI.
Chain extender refers to the compound that can promote molecule chain extension, extend, and chain extender can make polyurethane reaction system rapid
Ground carries out chain extension and crosslinking, and they have the characteristic group that can be chemically reacted with reaction system, and molecular weight is low, and reaction is lived
Sprinkle, stronger response competition probability is constituted to isocyanates and polyalcohols system, they can extremely efficient adjust reaction system
Reaction speed；The crosslinking agent and consumption of different cultivars can be used, the technological parameters such as reactant viscosity growth is adjusted, is allowed to adapt to
The requirement of processing.Participate in reacting and enter in main polymer chain using chain extender, can be by some of chain extension agent molecule characteristic
Unit structure is introduced into polyurethane backbone, can influence some performances of polyurethane.It is preferred that, the chain extender is ethylene glycol, third
Glycol, BDO, diglycol, glycerine, trimethylolpropane, Isosorbide-5-Nitrae-cyclohexanediol, hydrogenated bisphenol A, α-sweet
At least one of oily allyl ether, glycidol allyl ether, cumyl peroxide, sulphur.
Ultra-violet absorber can resist damage of the ultraviolet to polyurethane matrix, and invention middle-ultraviolet lamp absorbent can be
Ultra-violet absorber known to those skilled in the art, for example can be purple for salicylate ultraviolet absorbent, benzophenone class
Ultraviolet absorbers, Benzotriazole Ultraviolet Stabilizer, group-substituted acrylonitrile ultra-violet absorber, triazine-based ultraviolet absorbent
At least one of with metal oxide-type ultra-violet absorber.In order to reduce the pollution to environment, it is preferred that do invention and use
Metal oxide, as ultra-violet absorber, can be specifically at least one of titanium dioxide and zinc oxide.
In the present invention, polyurethane is modified by metal salt, so as to improve the heat resistance of polyurethane, it is preferred that
The metal salt is at least one of molysite, magnesium salts, aluminium salt, cobalt salt, nickel salt, zinc salt, mantoquita, titanium salt.
Organic solvent can improve the uniformity of material mixing, and the present invention does not have special want to the species of organic solvent
Ask, can be well known to the art personnel as long as can play a part of and dissolve ultra-violet absorber, example
Such as, the organic solvent is acetone, DMF, 1-METHYLPYRROLIDONE, DMA, dimethyl
Acetamide, dichloromethane, triethyl phosphate, acetone, chloroform, toluene, ethanol, acetic acid, ethyl acetate, formic acid, chloroform, four
At least one of hydrogen furans and dimethyl sulfoxide (DMSO).
It is preferred that, also containing at least one of crosslinking agent, surfactant and catalyst in raw material.
The surfactant can be preferably nonionic surfactant, be specifically as follows polypyrrole alkanone, polyoxy second
Alkene-poiyoxypropylene copolymer, OPEO, NPE, high-carbon fatty alcohol polyoxyethylene ether, fat
Sour polyoxyethylene ester, polyoxyethylene amine, polyoxyethylate amide, the ethylene oxide adduct of polypropylene glycol, sorbitan ester, sugarcane
At least one of sugar ester or alkylolamides.
The catalyst is amines catalyst, is specifically as follows triethylene diamine, dimethylaminoethyl ether, dimorpholine diethyl
Base ether, N, N- dimethyl cyclohexyl amines, N-ethylmorpholine, N-methyldicyclohexylamine, pentamethyl-diethylenetriamine, triethylamine and two
One or both of methylethanolamine is a variety of, preferably triethylene diamine, dimethylaminoethyl ether and N,N-Dibenzylamine
At least one of.
A kind of preparation method of the enhancing polyurethane material of heat-resisting ageing-resisting, comprises the following steps：
The preparation of polyaminoester emulsion：After PEPA and diisocyanate are mixed in proportion, chain extender, crosslinking are added
Agent and surfactant, reaction obtain polyaminoester emulsion；
The preparation of thermal polyurethane：After metal salt is fully dissolved in water, it is well mixed, is then transferred to anti-with polyaminoester emulsion
Answer in kettle, 2 ~ 10h is reacted at 100 ~ 200 DEG C, thermal polyurethane elastomer is obtained；
The preparation of the enhancing polyurethane material of heat-resisting ageing-resisting：Thermal polyurethane elastomer is mixed with ultra-violet absorber
Granulation, obtains the enhancing polyurethane material of heat-resisting ageing-resisting.
It is preferred that, the concentration of the metal salt is 0.05 ~ 0.2mol/L.
The method of heretofore described granulation can be that well known to one of ordinary skill in the art, for example, can be：By each group
Divide in raw material input super mixer and carry out mixed at high speed；Then mixed material is delivered in screw extruder, carried out at extrusion
Reason.
Compared with prior art, the characteristics of it is protruded and excellent effect are：
Water as solvent is used only in preparation process of the present invention, it is environmental protection, pollution-free；With the present invention by metal ion to poly- ammonia
Ester is modified, and due to metal ion crosslinked polyurethane, improves heat resistance and anti-flammability；Due to the poly- ammonia of metal ion crosslinked
Ester, does not use other fire retardants, reduces the injury to matrix physical property.Using the polyurethane prepared by the inventive method
Material is fine and close, uniform, while the characteristics of having heat-resisting, ageing-resistant and good mechanical performance.Equipment needed for of the invention and operation letter
It is single, it is easy to mass produce.
Embodiment
Below by way of embodiment, the present invention is described in further detail, but this should not be interpreted as to the present invention
Scope be only limitted to following example.In the case where not departing from above method thought of the present invention, according to ordinary skill
Various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
A kind of enhancing polyurethane material of heat-resisting ageing-resisting, is made up of the raw material containing following material：Terephthalate
50 parts, 20 parts of IPDI, 3 parts of cumyl peroxide, 6 parts of ferric nitrate, salicylate ultraviolet absorb
3 parts of agent, 0.6 part of polyoxyethylene carboxylate, 100 parts of 1-METHYLPYRROLIDONE.
The preparation method of the enhancing polyurethane material of the heat-resisting ageing-resisting, comprises the following steps：
The preparation of polyaminoester emulsion：50 parts of terephthalate is well mixed for 20 parts with IPDI
Afterwards, 0.6 part of 3 parts of cumyl peroxide, crosslinking agent and polyoxyethylene carboxylate are added, reaction obtains polyaminoester emulsion；
The preparation of thermal polyurethane：By ferric nitrate, 6 parts are fully dissolved to concentration for 0.05mol/L in water, with polyaminoester emulsion
It is well mixed, then it is transferred in reactor, 2h is reacted at 100 DEG C, obtains thermal polyurethane elastomer；
The preparation of the enhancing polyurethane material of heat-resisting ageing-resisting：Thermal polyurethane elastomer and salicylate ultraviolet are absorbed
3 parts of progress mixing granulations of agent, obtain the enhancing polyurethane material of heat-resisting ageing-resisting.
Embodiment 2
A kind of enhancing polyurethane material of heat-resisting ageing-resisting, is made up of the raw material containing following material：PEO glycol 52
Part, 30 parts of tetramethylene diisocyanate, 4 parts of propane diols, 7 parts of magnesium chloride, 4 parts of benzophenone class ultra-violet absorber, dimethylamino
2.1 parts of ethylether, 0.5 part of polyoxyethylate amide, 100 parts of water.
A kind of preparation method of the enhancing polyurethane material of heat-resisting ageing-resisting, comprises the following steps：
The preparation of polyaminoester emulsion：After 30 parts of 52 parts of PEO glycol and tetramethylene diisocyanate are well mixed,
Add 4 parts of propane diols, 2.1 parts of dimethylaminoethyl ether, 0.5 part of polyoxyethylate amide, crosslinking agent and polyoxyethylate amide 0.5
Part, reaction obtains polyaminoester emulsion；
The preparation of thermal polyurethane：By magnesium chloride, 7 parts are fully dissolved to concentration for 0.08mol/L in water, with polyaminoester emulsion
It is well mixed, then it is transferred in reactor, 4h is reacted at 120 DEG C, obtains thermal polyurethane elastomer；
The preparation of the enhancing polyurethane material of heat-resisting ageing-resisting：By thermal polyurethane elastomer and benzophenone class ultra-violet absorber 4
Part carries out mixing granulation, obtains the enhancing polyurethane material of heat-resisting ageing-resisting.
Embodiment 3
A kind of enhancing polyurethane material of heat-resisting ageing-resisting, is made up of the raw material containing following material：Polypropylene oxide glycol 54
Part, 40 parts of hexamethylene diisocyanate, 5 parts of 4- cyclohexanediols, 10 parts of aluminum sulfate, water Benzotriazole Ultraviolet Stabilizer 5
Part, 0.2 part of polypyrrole alkanone, 1.1 parts of N,N-Dibenzylamine, 100 parts of dimethyl acetamide.
The preparation method of the enhancing polyurethane material of the heat-resisting ageing-resisting, comprises the following steps：
The preparation of polyaminoester emulsion：After 54 parts of polypropylene oxide glycol, 40 parts of hexamethylene diisocyanate are well mixed, plus
Enter 0.2 part of 5 parts of Isosorbide-5-Nitrae-cyclohexanediol, 1.1 parts of N,N-Dibenzylamine, crosslinking agent and polypyrrole alkanone, reaction obtains polyurethane
Emulsion；
The preparation of thermal polyurethane：By aluminum sulfate, 10 parts are fully dissolved to concentration for 0.1mol/L in water, with polyaminoester emulsion
It is well mixed, then it is transferred in reactor, 4h is reacted at 150 DEG C, obtains thermal polyurethane elastomer；
The preparation of the enhancing polyurethane material of heat-resisting ageing-resisting：By thermal polyurethane elastomer and benzotriazole ultraviolet radiation absorption
5 parts of progress mixing granulations of agent, obtain the enhancing polyurethane material of heat-resisting ageing-resisting.
Embodiment 4
A kind of enhancing polyurethane material of heat-resisting ageing-resisting, is made up of the raw material containing following material：Polytetrahydrofuran diol 55
Part, 45 parts of toluene di-isocyanate(TDI), hydrogenated bisphenol A, 6 parts of α-allylin, 12 parts of cobalt nitrate, 6 parts of titanium dioxide, two
0.5 part of quinoline Anaesthetie Ether, 0.3 part of N-methyldicyclohexylamine, 0.5 part of sorbitan ester, 100 parts of N,N-dimethylformamide.
A kind of preparation method of the enhancing polyurethane material of heat-resisting ageing-resisting, comprises the following steps：
The preparation of polyaminoester emulsion：After 45 parts of 55 parts of polytetrahydrofuran diol and toluene di-isocyanate(TDI) are well mixed, add
Hydrogenated bisphenol A, 6 parts of α-allylin, 0.5 part of N,N-Dibenzylamine, 0.3 part of N-methyldicyclohexylamine, crosslinking agent and
0.5 part of sorbitan ester, reaction obtains polyaminoester emulsion；
The preparation of thermal polyurethane：By cobalt nitrate, 12 parts are fully dissolved to concentration for 0.15mol/L in water, with polyaminoester emulsion
It is well mixed, then it is transferred in reactor, 9h is reacted at 170 DEG C, obtains thermal polyurethane elastomer；
The preparation of the enhancing polyurethane material of heat-resisting ageing-resisting：By thermal polyurethane elastomer and titanium dioxide, 6 parts are mixed
Granulation, obtains the enhancing polyurethane material of heat-resisting ageing-resisting.
Embodiment 5
A kind of enhancing polyurethane material of heat-resisting ageing-resisting, is made up of the raw material containing following material：Terephthalate
50 parts, 20 parts of IPDI, 3 parts of cumyl peroxide, 6 parts of ferric nitrate, salicylate ultraviolet absorb
3 parts of agent, 0.2 part of pentamethyl-diethylenetriamine, 0.1 part of triethylene diamine, 0.2 part of high-carbon fatty alcohol polyoxyethylene ether, N- methyl
100 parts of pyrrolidones.
A kind of preparation method of the enhancing polyurethane material of heat-resisting ageing-resisting, comprises the following steps：
The preparation of polyaminoester emulsion：58 parts of polyethylene glycol adipate glycol is well mixed for 50 parts with 1,5- naphthalene diisocyanates
Afterwards, 8 parts of glycidol allyl ether, 0.2 part of pentamethyl-diethylenetriamine, 0.1 part of triethylene diamine, crosslinking agent and high-carbon are added
0.2 part of AEO, reaction obtains polyaminoester emulsion；
The preparation of thermal polyurethane：By copper sulphate, 15 parts are fully dissolved to concentration for 0.2mol/L in water, with polyaminoester emulsion
It is well mixed, then it is transferred in reactor, 7h is reacted at 130 DEG C, obtains thermal polyurethane elastomer；
The preparation of the enhancing polyurethane material of heat-resisting ageing-resisting：By thermal polyurethane elastomer and zinc oxide, 8 parts are mixed
Granulation, obtains the enhancing polyurethane material of heat-resisting ageing-resisting.
Performance test：
According to the limited oxygen index of ASTMD2863-00 method test sample.
Fire resistance is tested：Test is according to ISO5600-1:2002 standards carry out, sample standard size be 100 × 100 ×
3mm3。
Smoke suppressing is tested：Test is carried out according to ISO5659-2 standards, and sample standard size is 75 × 75 × 2.5mm3。
Mechanics Performance Testing：Test is carried out according to ISO8256-2004 standards, and rate of extension is 300mmmin-1。
The performance parameter of each sample in embodiment 1 ~ 5
Claims (9)
1. the enhancing polyurethane material of a kind of heat-resisting ageing-resisting, it is characterised in that be made up of the raw material containing following material：Polyester
Polyalcohol, diisocyanate, chain extender, metal salt, ultra-violet absorber, organic solvent；The metal salt be molysite, magnesium salts,
At least one of aluminium salt, cobalt salt, nickel salt, zinc salt, mantoquita, titanium salt.
2. the enhancing polyurethane material of heat-resisting ageing-resisting according to claim 1, it is characterised in that by containing following material
Raw material be made by weight：50 ~ 60 parts of PEPA, 20 ~ 60 parts of diisocyanate, 3 ~ 8 parts of chain extender, metal salt 5 ~ 20
Part, 3 ~ 8 parts of ultra-violet absorber, 100 parts of organic solvent.
3. the enhancing polyurethane material of heat-resisting ageing-resisting according to claim 1, it is characterised in that the PEPA
For polyethylene terephthalate, polycaprolactone diols, PEO glycol, polypropylene oxide glycol, PolyTHF
Glycol, polyethylene glycol adipate glycol, polyadipate-BDO esterdiol, polyhexamethylene adipate glycol or on
State at least one of homopolymerization or copolymer glycols of monomer；The diisocyanate is IPDI, four methylenes
Group diisocyanate, hexamethylene diisocyanate, toluene di-isocyanate(TDI), 1,5- naphthalene diisocyanates, diphenyl methane two
At least one of isocyanates or XDI.
4. the enhancing polyurethane material of heat-resisting ageing-resisting according to claim 1, it is characterised in that the chain extender is second
Glycol, propane diols, BDO, diglycol, glycerine, trimethylolpropane, Isosorbide-5-Nitrae-cyclohexanediol, A Hydrogenated Bisphenol A
At least one of A, α-allylin, glycidol allyl ether, cumyl peroxide, sulphur.
5. the enhancing polyurethane material of heat-resisting ageing-resisting according to claim 1, it is characterised in that the ultraviolet radiation absorption
Agent is salicylate ultraviolet absorbent, benzophenone class ultra-violet absorber, Benzotriazole Ultraviolet Stabilizer, substitution propylene
At least one of nitrile ultra-violet absorber, triazine-based ultraviolet absorbent, metal oxide-type ultra-violet absorber.
6. the enhancing polyurethane material of heat-resisting ageing-resisting according to claim 1, it is characterised in that the organic solvent is
Acetone, N,N-dimethylformamide, 1-METHYLPYRROLIDONE, DMAC N,N' dimethyl acetamide, dimethyl acetamide, dichloromethane,
Triethyl phosphate, acetone, chloroform, toluene, ethanol, acetic acid, ethyl acetate, formic acid, chloroform, tetrahydrofuran and dimethyl are sub-
At least one of sulfone.
7. the enhancing polyurethane material of heat-resisting ageing-resisting according to claim 1, it is characterised in that also containing friendship in raw material
Join at least one of agent, surfactant and catalyst.
8. a kind of preparation method of the enhancing polyurethane material of heat-resisting ageing-resisting as described in claim 1 ~ 7 any one, its
It is characterised by, comprises the following steps：
The preparation of polyaminoester emulsion：After PEPA and diisocyanate are mixed in proportion, chain extender, crosslinking are added
Agent and surfactant, reaction obtain polyaminoester emulsion；
The preparation of thermal polyurethane：After metal salt is fully dissolved in water, it is well mixed, is then transferred to anti-with polyaminoester emulsion
Answer in kettle, 2 ~ 10h is reacted at 100 ~ 200 DEG C, thermal polyurethane elastomer is obtained；
The preparation of the enhancing polyurethane material of heat-resisting ageing-resisting：Thermal polyurethane elastomer is mixed with ultra-violet absorber
Granulation, obtains the enhancing polyurethane material of heat-resisting ageing-resisting.
9. the preparation method of the enhancing polyurethane material of heat-resisting ageing-resisting according to claim 8, it is characterised in that described
The concentration of metal salt is 0.05 ~ 0.2mol/L.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940739A (en) * | 2022-06-08 | 2022-08-26 | 万华化学集团股份有限公司 | High-heat-resistance and easy-to-dissolve TPU and preparation method thereof |
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| CN101486890A (en) * | 2008-04-30 | 2009-07-22 | 上海工程技术大学 | Anstatic agent and antistatic urethane elastomer material thereof |
| CN103119078A (en) * | 2010-03-11 | 2013-05-22 | 米尔萨尼产品公司 | High conductive, soft urethane rollers |
| CN106750145A (en) * | 2016-12-16 | 2017-05-31 | 四川大学 | Review one's lessons by oneself polyurethane material of redoubling force-responsive and preparation method thereof |
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2017
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101486890A (en) * | 2008-04-30 | 2009-07-22 | 上海工程技术大学 | Anstatic agent and antistatic urethane elastomer material thereof |
| CN103119078A (en) * | 2010-03-11 | 2013-05-22 | 米尔萨尼产品公司 | High conductive, soft urethane rollers |
| CN106750145A (en) * | 2016-12-16 | 2017-05-31 | 四川大学 | Review one's lessons by oneself polyurethane material of redoubling force-responsive and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940739A (en) * | 2022-06-08 | 2022-08-26 | 万华化学集团股份有限公司 | High-heat-resistance and easy-to-dissolve TPU and preparation method thereof |
| CN114940739B (en) * | 2022-06-08 | 2023-07-11 | 万华化学集团股份有限公司 | High-heat-resistance and easily-soluble TPU and preparation method thereof |
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