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High-temperature-self-crosslinked modified waterborne polyurethane resin and preparation method thereof

A water-based polyurethane and self-crosslinking technology, applied in the field of high-temperature self-crosslinking modified water-based polyurethane resin, can solve the problems of weak adhesion and lack of tear strength, and achieve the effect of avoiding short service life

Inactive Publication Date: 2018-03-23
鹤山市河本聚脂化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the self-crosslinking modified water-based polyurethane resin of the prior art, the adhesion to the abrasive carborundum is weak, and the tear resistance is still lacking

Method used

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  • High-temperature-self-crosslinked modified waterborne polyurethane resin and preparation method thereof
  • High-temperature-self-crosslinked modified waterborne polyurethane resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 10kg toluene diisocyanate, 10kg isophorone diisocyanate, 10kg diphenylmethane diisocyanate, 10kg1,6-hexamethylene diisocyanate, 10kg xylylene diisocyanate, 10kg naphthalene-1,5-diisocyanate, 5kg Polymethylene polyphenyl isocyanate, 5kg tetramethylxylylene diisocyanate, 5kg methylcyclohexyl diisocyanate, 5kg dicyclohexylmethane diisocyanate, 20kg polycaprolactone polyol, 20kg polycarbonate polyol Alcohol, 20kg polytetrahydrofuran ether polyol, 20kg polyethylene oxide polyol, 20kg polypropylene oxide polyol, 20kg hydroxyl-terminated polybutadiene, 20kg polysiloxane polyol and 10kg polyester ether polyol at 85~ React at 95°C for 2 to 3 hours; add 5kg dimethylolpropionic acid, 5kg dimethylolbutyric acid, 5kg dimethylolvaleric acid, 5kg dimethylol octanoic acid, 1kg ethylene glycol, 1kg diethylene acetal Diol, 1kg 1,4-butanediol, 1kg 2,3-butanediol and 1kg 1,6-hexanediol, and at the same time add an appropriate amount of acetone to react at 75-85°C for 1-3 hours; then a...

Embodiment 2

[0036] Take 25kg toluene diisocyanate, 25kg isophorone diisocyanate, 20kg lactone diol, 20kg polycarbonate diol, 20kg polytetrahydrofuran ether diol, 10kg polyethylene oxide diol, 10kg polycyclic Propylene oxide diol, 10kg hydroxyl-terminated polybutadiene and 10kg polysiloxane diol react at 85-95°C for 2-3 hours; add 5kg dimethylolpropionic acid, 5kg dimethylolbutyric acid, 2kg of ethylene glycol and 2kg of diethylene glycol, and at the same time add an appropriate amount of acetone to react at 75-85°C for 1-3 hours; then add 0.05kg of Coscat83 and 0.05kg of organic bismuth 1610 and react at 65-75°C for 2-3 hours; Cool down to 35-45°C, add 10kg of amino curing agent, and add 10kg of triethylamine to neutralize; finally add 300kg of water, react the obtained product at 85-95°C for 2-3 hours, remove acetone in vacuum to obtain the water-based polyurethane resin.

Embodiment 3

[0038] Take 20kg toluene diisocyanate, 20kg isophorone diisocyanate, 20kg diphenylmethane diisocyanate, 40kg polycaprolactone polyol, 40kg polycarbonate polyol and 40kg polytetrahydrofuran ether polyol and react at 85-95°C for 2 ~3h; add 5kg dimethylolpropionic acid, 5kg dimethylolbutyric acid, 5kg dimethylolvaleric acid, 2kg ethylene glycol, 1kg diethylene glycol and 1kg1,4-butanediol, and simultaneously Add appropriate amount of acetone and react at 75-85°C for 1-3 hours; then add 0.02kg Coscat83, 0.02kg organic bismuth 1610 and 0.02kg organic bismuth 2010 and react at 65-75°C for 2-3 hours; cool down to 35-45°C and add 15kg Amino curing agent, and neutralized by adding 12kg of triethylamine; finally adding 400kg of water, the obtained product was reacted at 85-95°C for 2-3 hours, and the acetone was removed in vacuum to obtain the water-based polyurethane resin.

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Abstract

The invention discloses a high-temperature self-crosslinking modified water-based polyurethane resin and a preparation method thereof, which are prepared from the following components in parts by weight: polyisocyanate (50-80 parts), polyol (100-150 parts), A chain extender (10-20 parts), a second chain extender (3-5 parts), organic bismuth catalyst (0.05-0.1 parts), triethylamine (10-15 parts), water (300-500 parts) , amino curing agent (10-20 parts); its preparation method includes the following steps: Step 1: react polyol and polyisocyanate at 85-95 ° C for 2-3 hours; Step 2: add first chain extender and second chain extender react at 75~85℃ for 1~3h; step 3: add organic bismuth catalyst and react at 65~75℃ for 2~3h; step 4: cool down to 35~45℃, add amino curing agent, and add in triethylamine and; Step 5: adding water, the obtained product is reacted at 85-95° C. for 2-3 hours, and the acetone is removed in vacuum to obtain the water-based polyurethane resin.

Description

technical field [0001] The invention relates to the field of high molecular polymers, and specifically discloses a high-temperature self-crosslinking modified water-based polyurethane resin. Background technique [0002] With the strengthening of people's awareness of environmental protection and environmental protection regulations, the research and development of environmentally friendly water-based polyurethane has been paid more and more attention. Water-based polyurethane is a representative of excellent resins and one of the hot spots in modern water-based resin research. [0003] In order to improve the performance of waterborne polyurethane resin, the self-crosslinking method has been cited in the industry. The so-called self-crosslinking method means that after the water-based polyurethane film is formed, it can automatically undergo a chemical reaction to realize crosslinking, improve the crosslinking degree of the coating film, and improve the performance of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C08G18/34C08G18/40C08G18/42C08G18/44C08G18/48C08G18/61C08G18/65C08G18/66C08G18/69C08G18/73C08G18/75C08G18/76
CPCC08G18/4018C08G18/3206C08G18/348C08G18/4009C08G18/4277C08G18/44C08G18/4833C08G18/4854C08G18/61C08G18/6511C08G18/6541C08G18/6607C08G18/6625C08G18/698C08G18/73C08G18/755C08G18/7614C08G18/7657C08G18/7671
Inventor 刘巧黄军波
Owner 鹤山市河本聚脂化工有限公司
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