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High-glossiness and anti-scratching waterborne polyurethane and preparation method thereof

A water-based polyurethane, anti-scratch technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the imperfection of water-based polyurethane laser transfer coatings, and the unsatisfactory performance of water-based polyurethane laser transfer coatings in stripping, gloss, and high temperature resistance Requirements and other issues, to achieve the effect of low peel strength, good peel performance and high gloss

Inactive Publication Date: 2019-04-09
CHINA TOBACCO ZHEJIANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the incomplete research on waterborne polyurethane laser transfer coatings, there are still many unsatisfactory performances of waterborne polyurethane laser transfer coatings, such as the peelability, gloss, and high temperature resistance of waterborne polyurethane laser transfer coatings. Meet the requirements, these properties are closely related to the properties of the resin itself in the production of coatings

Method used

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  • High-glossiness and anti-scratching waterborne polyurethane and preparation method thereof
  • High-glossiness and anti-scratching waterborne polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Prepare materials according to the following components and ratios

[0025] 6.9KG of polyether diol with a molecular weight of 3000, 7KG of polyester diol with a molecular weight of 1000, 0.3KG of trimethylolpropane, 8.4KG of hydrogenated phenylmethane diisocyanate, and 1.4KG of dimethylol propionic acid; 1 , 4-cyclohexanedimethanol 0.5KG, N-methylpyrrolidone 1.2kg, acetone 14.5kg, triethylamine 1.1kg, water 58.4kg, isophoronediamine 0.3kg;

[0026] (2) Raw material mixing, heating and dehydration

[0027] Measure polyether diol and polyester diol, add chain extender trimethylolpropane, stir the three evenly and heat to 120°C, dehydrate under vacuum -0.06mpa for 1h, then cool down to 80°C to obtain a mixture 1;

[0028] (3) Prepolymer synthesis

[0029] Add hydrogenated phenylmethane diisocyanate to the mixture obtained in the above step (2), control the temperature at 90°C, stir and react for 2 hours, then add hydrophilic agent dimethylolpropionic acid, chain ex...

Embodiment 2

[0033] (1) Prepare materials according to the following components and ratios

[0034] 7KG of polyether diol with a molecular weight of 3000, 6.8KG of polyester diol with a molecular weight of 1000, 0.2KG of trimethylolpropane, 8.5KG of hydrogenated phenylmethane diisocyanate, and 1.5KG of dimethylol propionic acid; 1 , 4-cyclohexanedimethanol 0.4KG, N-methylpyrrolidone 1.5kg, acetone 14.6kg, triethylamine 1.2kg, water 58.1kg, isophoronediamine 0.2kg;

[0035] (2) Raw material mixing, heating and dehydration

[0036] Measure polyether diol and polyester diol, add chain extender trimethylolpropane, stir the three evenly and heat to 120°C, dehydrate under vacuum -0.06mpa for 1h, then cool down to 80°C to obtain a mixture 1;

[0037] (3) Prepolymer synthesis

[0038] Add hydrogenated phenylmethane diisocyanate to the mixture obtained in the above step (2), control the temperature at 90°C, stir and react for 2 hours, then add hydrophilic agent dimethylolpropionic acid, chain ex...

Embodiment 3

[0042] (1) Prepare materials according to the following components and ratios

[0043] Polyether diol with a molecular weight of 3000 is 7.1KG, polyester diol with a molecular weight of 1000 is 6.5KG, trimethylolpropane is 0.1KG, hydrogenated phenylmethane diisocyanate is 8.6KG, dimethylol propionic acid is 1.6KG; 0.3kg of 1,4-cyclohexanedimethanol, 1.7kg of N-methylpyrrolidone, 14.8kg of acetone, 1.3kg of triethylamine, 57.9kg of water, and 0.1kg of isophoronediamine;

[0044] (2) Raw material mixing, heating and dehydration

[0045] Measure polyether diol and polyester diol, add chain extender trimethylolpropane, stir the three evenly and heat to 120°C, dehydrate under vacuum -0.06mpa for 1h, then cool down to 80°C to obtain a mixture 1;

[0046] (3) Prepolymer synthesis

[0047] Add hydrogenated phenylmethane diisocyanate to the mixture obtained in the above step (2), control the temperature at 90°C, stir and react for 2 hours, then add hydrophilic agent dimethylolpropio...

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Abstract

The invention provides high-glossiness and anti-scratching waterborne polyurethane. The polyurethane has the properties of high glossiness, high temperature resistance, no white and easy peeling. Thepolyurethane is composed of the following components in percentage by weight: 6.9 to 7.1 percent of polyether diol, 6.5 to 7 percent of polyester diol, 0.1 to 0.3 percent of trimethylolpropane, 8.4 to8.6 percent of hydrogenated phenylmethane diisocyanate, 1.4 to 1.6 percent of dihydromethyl propionic acid, 0.3 to 0.5 percent of 1,4-cyclohexanedimethanol, 1.2 to 1.7 percent of N-methyl pyrrolidone, 14.5 to 14.8 percent of acetone, 1.1 to 1.3 percent of triethylamine, 54.9 to 58.4 percent of water and 0.1 to 0.3 percent of isophorone diamine.

Description

technical field [0001] The invention belongs to the field of water-based coatings, and relates to a high-gloss and anti-scratch water-based polyurethane and a preparation method thereof, in particular to a water-based polyurethane laser transfer coating capable of producing high gloss, easy peeling, high temperature resistance, suitable for gravure printing and offset printing Waterborne polyurethane and its preparation method. Background technique [0002] Waterborne polyurethane uses water as the dispersion medium. It has the advantages of non-toxic, non-flammable, non-polluting, energy-saving, safe and reliable, and meets the development requirements of green industry. [0003] However, due to the incomplete research on waterborne polyurethane laser transfer coatings, there are still many unsatisfactory performances of waterborne polyurethane laser transfer coatings, such as the peelability, gloss, and high temperature resistance of waterborne polyurethane laser transfer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/42C08G18/48C08G18/66C08G18/75C08G18/12C08G18/32C08G18/34C08J7/04C09D175/06C09D175/08C09D5/20C08L67/02C08L23/12
CPCC08G18/0823C08G18/12C08G18/3206C08G18/3212C08G18/3234C08G18/348C08G18/4018C08G18/42C08G18/48C08G18/6625C08G18/758C08J7/0427C08J2323/12C08J2367/02C08J2475/06C08J2475/08C09D5/20C09D175/06C09D175/08C08G18/32
Inventor 王辉杜芳琪黄芳芳汤德芳李海锋戚奇杰
Owner CHINA TOBACCO ZHEJIANG IND