CN105153399A - Hydrolysis-resistant super-soft wet-wax-feeling dry-method surface layer resin and preparation method thereof - Google Patents
Hydrolysis-resistant super-soft wet-wax-feeling dry-method surface layer resin and preparation method thereof Download PDFInfo
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- CN105153399A CN105153399A CN201510634184.1A CN201510634184A CN105153399A CN 105153399 A CN105153399 A CN 105153399A CN 201510634184 A CN201510634184 A CN 201510634184A CN 105153399 A CN105153399 A CN 105153399A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4202—Two or more polyesters of different physical or chemical nature
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses hydrolysis-resistant super-soft wet-wax-feeling dry-method surface layer resin and a preparation method thereof. Firstly, a polyatomic alcohol compound, a chain extender and an antioxidant are added into an organic solvent, 80%-85% of isocyanate is added after the mixture is stirred uniformly and reacted for 1 h at the temperature of 60 DEG C to 85 DEG C, balance of isocyanate and organic tin or an organic bismuth catalyst are added, the mixture is reacted continuously for 2-5 h at the temperature of 75-85 DEG C after stirred uniformly, the final viscosity is controlled to be in the range of 80-120 Pa.s/25 DEG C, the solid content is 30%, a reaction terminator is added to obtain polyurethane resin after reaction. Under the condition that an oil wax agent is not used in the polyurethane resin, touch and hydrolysis resistance of soft resin wet wax are adjusted by controlling matching of simply used polyhydric alcohols and the product modulus, compared with similar products, the product defect caused by transfer of a silicone oil additive can be prevented fundamentally, and the resin has a great product value.
Description
One, technical field
The present invention relates to a kind of functional urethane resin and preparation method thereof, be specifically related to a kind of hydrolysis ultra-soft matter and wet wax sense dry method surface layer resin and preparation method thereof.
Two, background technology
In the product category of synthetic leather industry, imitate the very large portion that the synthetic leather with wet wax leather effect accounts for synthetic leather total amount, but always add various silicone oil or silicone oil performed polymer in actual production to realize the leather effect of wet wax, this causes this series products after comparatively complex environment (hot and humid) is placed, very easily there is the problem that silicone oil is separated out, be referred to as in industry to send out mist.Affect product quality, cause a lot of quality accident.In addition similar soft resin has normal decorative pattern fixed effect for meeting resin and can only adopt polyester material, so anti-hydrolytic performance is generally poor, this product for high-quality is again a huge defect undoubtedly.
Three, summary of the invention
The present invention aims to provide a kind of hydrolysis ultra-soft matter and to wet wax sense dry method surface layer resin and preparation method thereof, to promote the anti-hydrolytic performance of soft dry method surface layer resin and wet wax sense of touch.
Hydrolysis ultra-soft matter of the present invention wets wax sense dry method surface layer resin, and its raw material and proportioning are constructed as follows:
Isocyanic ester
Polyol compound
Chainextender
Oxidation inhibitor
Reaction terminating agent methyl alcohol
Organic tin or organo-bismuth class catalyzer, addition is the 0.001-0.05% of polyol amount;
Described polyol compound is polyester polyol, polyether glycol or polycarbonate polyol, and the number-average molecular weight of described polyol compound is 2000-4000;
Total hydroxyl mol ratio in described isocyanic ester in isocyano and polyol compound and chainextender is 0.9-1:1;
The mol ratio of described polyol compound and chainextender is 1:0.8-1.5.
Described isocyanic ester is 4,4 '-diphenylmethanediisocyanate.
Described polyol compound to be functionality be 2 hexanodioic acid system polyester polyol, polyether glycol or polycarbonate polyol;
Described hexanodioic acid system polyester polyol is by ethylene glycol, 1,4-butyleneglycol, Diethylene Glycol, 1, ammediol, 3-methyl isophthalic acid, one or more and hexanodioic acid in 5 pentanediols are the proportioning of 1.02-1.2:1 in molar ratio and are that catalyzer synthesizes with isopropyl titanate, and wherein catalyzer is the 0.2%-1% of acid, alcohol total mass;
Described polyether glycol is polytetrahydrofuran polyol and/or polyoxypropylene polyol;
Described polycarbonate polyol be 1,5-PD and/or 1,6-hexylene glycol and methylcarbonate copolymerization polycarbonate polyol and with polyether glycol grafting or composite product.
Described chainextender is ethylene glycol, BDO, 1,6-hexylene glycol, Diethylene Glycol, 1,3-PD, 3-methyl isophthalic acid, one or more in 5 pentanediols.
Described oxidation inhibitor is four (β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester (oxidation inhibitor 1-1010) or 2,2'-methylene-bis (4-methyl-6-tert-butylphenol) (antioxidant 2246), the addition of oxidation inhibitor is 0.5 ‰-3 ‰ of raw material total mass.
The addition of reaction terminating agent methyl alcohol is the 0-0.5 ‰ of raw material total mass.
Hydrolysis ultra-soft matter of the present invention wets the preparation method of wax sense dry method surface layer resin, comprises following process:
By polyol compound, chainextender and oxidation inhibitor add in organic solvent, forming solid content is the solution of 60-65%, add the isocyanic ester of 80%-85% after stirring and react 1 hour in 60-80 DEG C, add the isocyanic ester of surplus and organic tin or organo-bismuth class catalyzer again, reaction 2-5h is continued in 75-85 DEG C after stirring, in the process of reaction, make final viscosity control at 80-120Pas/25 DEG C along with the increase of system viscosity constantly supplements organic solvent, solid content is 30%, add reaction terminating agent methyl alcohol after having reacted and namely obtain urethane resin.
Formulating of recipe and synthesis focus on not using the auxiliary agent that can bring wet wax sense to resin in whole reaction process, realize merely, there is not the hidden danger of quality such as silicone oil precipitation from polyvalent alcohol proportioning.
The water ratio of described polyol compound, isocyanic ester, chainextender is all less than 500ppm; Described organic solvent is N, N '-dimethyl formamide or butanone.
By the obtained urethane resin of above-mentioned formula by dry method separate-type paper shifting process, the leather goods made have that surface touch wets that wax sense is strong, excellent hydrolysis resistance, send out the advantages such as mist hidden danger is little.Compared with other like product, there is clear superiority, have larger marketable value.
Four, embodiment
The technique means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
In embodiment, each component is as follows respectively below:
EG is ethylene glycol;
SP-1 to be molecular weight be 3000 hexanodioic acid butyleneglycol system polyester polyol;
SP-2 to be molecular weight be 2000 polytetrahydrofuran polyol;
SP-3 to be molecular weight be 2000 1,6 hexylene glycol polycarbonate;
SP-4 to be molecular weight the be 1,5-PD of 2000, the polycarbonate polyol of 1,6-hexylene glycol and methylcarbonate copolymerization;
SP-5 to be molecular weight be 4000 1,5-PD, 1,6-hexylene glycol and the polycarbonate polyol of methylcarbonate copolymerization and the dibasic alcohol of polytetrahydrofuran polyol copolymerization;
SP-6 to be molecular weight be 3000 hexanodioic acid butyleneglycol, 3-methyl isophthalic acid, 5 pentanediol system polyester polyols;
Above-mentioned raw materials is all purchased from Hefei Anli New Material Polyurethane Co., Ltd..
I-1010 is commercially available oxidation inhibitor, entirely four [β-(3,5-di-t-butyl-4 hydroxy phenyl) propionic acid] pentaerythritol ester by name;
MDI is 4,4 '-diphenylmethanediisocyanate;
Organo-bismuth is catalysts, and wherein the feature of environmental protection of organo-bismuth is better than organotin is know altogether in industry;
DMF is solvent N, N '-dimethyl formamide, and methyl alcohol is reaction terminating agent.
Embodiment 1:
Raw material and proportioning:
First add in organic solvent DMF by SP-6,55kgEG and 3kg oxidation inhibitor I-1010 of SP-5,100kg of SP-4,110kg of SP-3,160kg of SP-2,50kg of SP-1,370kg of 250kg, forming solid content is the solution of 60-65%; The MDI adding 80%-85% after stirring in 60-80 DEG C of reaction 1 hour, then add the MDI of surplus and organo-bismuth class catalyzer (
8106, the leading chemical company of the U.S. is produced) 0.2kg, after stirring, reaction 2-5h is continued in 75-85 DEG C, in the process of reaction, make final viscosity control at 80-120Pas/25 DEG C along with the increase of system viscosity constantly supplements organic solvent, solid content is 30%, adds reaction terminating agent methyl alcohol and namely obtain urethane resin after having reacted.
Embodiment 2:
Raw material and proportioning:
First add in organic solvent DMF by SP-6,55kgEG and 3kg oxidation inhibitor I-1010 of SP-5,210kg of SP-4,70kg of SP-3,100kg of SP-2,150kg of SP-1,270kg of 150kg, forming solid content is the solution of 60-65%; The MDI adding 80%-85% after stirring in 60-80 DEG C of reaction 1 hour, then add the MDI of surplus and organo-bismuth class catalyzer (
8106, the leading chemical company of the U.S. is produced) 0.2kg, after stirring, reaction 2-5h is continued in 75-85 DEG C, in the process of reaction, make final viscosity control at 80-120Pas/25 DEG C along with the increase of system viscosity constantly supplements organic solvent, solid content is 30%, adds reaction terminating agent methyl alcohol and namely obtain urethane resin after having reacted.
Comparative example 1:
Of the present inventionly having that surface touch wets that wax sense is strong to verify, excellent hydrolysis resistance, sending out the little advantage of mist hidden danger, the wax sense dry method that wet by the hydrolysis resistance soft prepared surface layer resin, makes synthetic leather by existing method, and concrete process hides is filled a prescription as follows:
ST-30A100kg
DMF70kg
Mill base is appropriate
Urethane resin prepared by the embodiment of the present invention 1 and embodiment 2 is prepared into polyurethane wet slurry according to comparative example, draws a design according to synthetic leather industry ordinary method, hydrolysis test, sense of touch evaluation and an anti-mist performance test.Sample preparation and testing method refer to synthetic leather technology, and Qu Jianbo etc. write, Chemical Industry Press (2010.3), and the slip-stick artist that the evaluation of feel, sense of touch asks long campaigns synthetic leather to be produced judges, the results are shown in following table 1.
Table 1
As can be seen from Table 1, urethane resin of the present invention surmounts ordinary resin completely at anti-hydrolytic performance, sense of touch, feel, anti-mist aspect of performance of sending out.
After testing, the Synthetic Leather made with the formula of above-mentioned enforcement, has good physicals and outstanding sense of touch, feel.Relative to common synthetic leather, there is clear superiority.
In claims of this specification sheets and the application, so-called system, refers to whole reaction system, is exactly the total amount of all substances.What describe in above-mentioned embodiment and specification sheets just illustrates principle of the present invention, and the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and jljl thereof.
Claims (5)
1. hydrolysis ultra-soft matter wets a wax sense dry method surface layer resin, it is characterized in that raw material and proportioning are constructed as follows:
Isocyanic ester
Polyol compound
Chainextender
Oxidation inhibitor
Reaction terminating agent methyl alcohol
Organic tin or organo-bismuth class catalyzer, addition is the 0.001-0.05% of polyol amount;
Described polyol compound is polyester polyol, polyether glycol or polycarbonate polyol, and the number-average molecular weight of described polyol compound is 2000-4000;
Total hydroxyl mol ratio in described isocyanic ester in isocyano and polyol compound and chainextender is 0.9-1:1;
The mol ratio of described polyol compound and chainextender is 1:0.8-1.5;
Described isocyanic ester is 4,4 '-diphenylmethanediisocyanate.
2. hydrolysis ultra-soft matter according to claim 1 wets wax sense dry method surface layer resin, it is characterized in that:
Described polyol compound to be functionality be 2 hexanodioic acid system polyester polyol, polyether glycol or polycarbonate polyol;
Described chainextender is ethylene glycol, BDO, 1,6-hexylene glycol, Diethylene Glycol, 1,3-PD, 3-methyl isophthalic acid, one or more in 5 pentanediols;
Described oxidation inhibitor is oxidation inhibitor 1-1010 or antioxidant 2246, and the addition of oxidation inhibitor is 0.5 ‰-3 ‰ of raw material total mass.
3. hydrolysis ultra-soft matter according to claim 2 wets wax sense dry method surface layer resin, it is characterized in that:
Described hexanodioic acid system polyester polyol is by ethylene glycol, 1,4-butyleneglycol, Diethylene Glycol, 1, ammediol, 3-methyl isophthalic acid, one or more and hexanodioic acid in 5 pentanediols are the proportioning of 1.02-1.2:1 in molar ratio and are that catalyzer synthesizes with isopropyl titanate, and wherein catalyzer is the 0.2%-1% of acid, alcohol total mass;
Described polyether glycol is polytetrahydrofuran polyol and/or polyoxypropylene polyol;
Described polycarbonate polyol be 1,5-PD and/or 1,6-hexylene glycol and methylcarbonate copolymerization polycarbonate polyol and with polyether glycol grafting or composite product.
4. hydrolysis ultra-soft matter according to claim 1 wets a preparation method for wax sense dry method surface layer resin, it is characterized in that comprising the steps:
By polyol compound, chainextender and oxidation inhibitor add in organic solvent, forming solid content is the solution of 60-65%, add the isocyanic ester of 80%-85% after stirring and react 1 hour in 60-80 DEG C, add the isocyanic ester of surplus and organic tin or organo-bismuth class catalyzer again, reaction 2-5h is continued in 75-85 DEG C after stirring, in the process of reaction, make final viscosity control at 80-120Pas/25 DEG C along with the increase of system viscosity constantly supplements organic solvent, solid content is 30%, add reaction terminating agent methyl alcohol after having reacted and namely obtain urethane resin.
5. preparation method according to claim 4, is characterized in that:
The water ratio of described polyol compound, isocyanic ester, chainextender is all less than 500ppm; Described organic solvent is N, N '-dimethyl formamide or butanone.
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Cited By (6)
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| CN106397728A (en) * | 2016-08-31 | 2017-02-15 | 合肥安利聚氨酯新材料有限公司 | Environment-friendly low-VOC two-component polyurethane resin for totally-dry-bonding bonding layer of synthetic leather and preparation method thereof |
| CN108707220A (en) * | 2018-06-15 | 2018-10-26 | 合肥安利聚氨酯新材料有限公司 | A kind of leather pigment compatibility improvement dry method face layer polyurethane resin and preparation method |
| CN109575213A (en) * | 2018-12-07 | 2019-04-05 | 福建华普树脂有限公司 | A kind of dry method foaming polyurethane resin and preparation method thereof |
| CN114144446A (en) * | 2019-08-07 | 2022-03-04 | 三井化学株式会社 | Polyurethane resin composition and molded article |
| CN114316771A (en) * | 2021-12-29 | 2022-04-12 | 雅涂科技(张家港)有限公司 | Two-component polyurethane coating and preparation method and application thereof |
| CN114805725A (en) * | 2022-03-26 | 2022-07-29 | 浙江禾欣科技有限公司 | TPU resin with good processing performance and preparation method thereof |
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| CN106397728A (en) * | 2016-08-31 | 2017-02-15 | 合肥安利聚氨酯新材料有限公司 | Environment-friendly low-VOC two-component polyurethane resin for totally-dry-bonding bonding layer of synthetic leather and preparation method thereof |
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| CN109575213A (en) * | 2018-12-07 | 2019-04-05 | 福建华普树脂有限公司 | A kind of dry method foaming polyurethane resin and preparation method thereof |
| CN109575213B (en) * | 2018-12-07 | 2021-04-16 | 福建华普树脂有限公司 | Dry-process foaming polyurethane resin and preparation method thereof |
| CN114144446A (en) * | 2019-08-07 | 2022-03-04 | 三井化学株式会社 | Polyurethane resin composition and molded article |
| CN114144446B (en) * | 2019-08-07 | 2023-08-15 | 三井化学株式会社 | Polyurethane resin composition and molded article |
| CN114316771A (en) * | 2021-12-29 | 2022-04-12 | 雅涂科技(张家港)有限公司 | Two-component polyurethane coating and preparation method and application thereof |
| CN114805725A (en) * | 2022-03-26 | 2022-07-29 | 浙江禾欣科技有限公司 | TPU resin with good processing performance and preparation method thereof |
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