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A kind of water-based flexible handle coating and preparation method thereof

A flexible and hand-feeling technology, which is applied in antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of not having a delicate hand feel, being difficult to meet the soft hand feeling, and high difficulty in synthesis, so as to reduce the system The risk of gelation, good resilience, and the effect of reducing the reaction density

Active Publication Date: 2021-01-22
JIANGSU SHENGYING NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the difference in water-based synthesis process, stability and film-forming mechanism from oil-based products, existing water-based polyurethane emulsions are difficult to meet the requirements of flexible hand feeling, anti-fingerprint, and weather resistance, so traditional water-based polyurethane film does not have delicate hand feeling , generally astringent
[0004] The existing literature on water-based flexible hand-feeling coatings is limited to polycarbonate modification, silicon-fluorine modification, adding matting agents, etc., and most of them have the disadvantages of high synthesis difficulty and high cost, and the flexible hand-feel is enhanced by adjusting the microstructure of the resin. The performance of

Method used

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  • A kind of water-based flexible handle coating and preparation method thereof
  • A kind of water-based flexible handle coating and preparation method thereof
  • A kind of water-based flexible handle coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The water-based flexible handle coating of the present embodiment is prepared by using the raw materials of the following components and contents:

[0041]

[0042]

[0043] The above-mentioned water-based flexible handle coating is prepared according to the following process steps:

[0044] Component a was stirred and dehydrated at 85° C. under vacuum, and the stirring speed was 200 rpm. After the water content in component a is less than 200ppm, stop vacuuming and return to normal pressure. Keep stirring and add components b and c, keep the reaction at 85°C for 2h. Keep stirring and add component d, keep the reaction at 85°C for 2h, if the viscosity is too high, add component h. Lower the temperature to 75°C, keep stirring and add component e, keep at 75°C and continue the reaction for 2h, when the viscosity is too high, add component h. Cool to 50°C, add component f, and continue stirring for 30 minutes before discharging. Disperse the synthesized resin at ...

Embodiment 2

[0046] The water-based flexible handle coating of the present embodiment is prepared by using the raw materials of the following components and contents:

[0047] a Polytetrahydrofuran diol (Mn=3000, PDI=1.30) 150g 41.23％ b HT-100 104.2g 28.65％ c 4,4'-Dicyclohexylmethane diisocyanate 39.3g 10.80％ d Dimethylolpropionic acid 24.1g 6.63％ e Trimethylolpropane 20.1g 5.53％ f N,N'-Dimethylethanolamine 14.7g 4.04％ g Tetraethylenepentamine 11.3g 3.12％ h acetone 170g - i Deionized water 760g -

[0048] The above-mentioned water-based flexible handle coating is prepared according to the following process steps:

[0049] Component a was stirred and dehydrated at 85° C. under vacuum, and the stirring speed was 200 rpm. After the water content in component a is less than 200ppm, stop vacuuming and return to normal pressure. Keep stirring and add components b and c, keep the reaction at 85°C for 2h. Keep stirr...

Embodiment 3

[0051] The water-based flexible handle coating of the present embodiment is prepared by using the raw materials of the following components and contents:

[0052] a Polytetrahydrofuran diol (Mn=2000, PDI=1.23) 130g 35.19％ b HT-100 104.2g 28.21％ c 4,4'-Dicyclohexylmethane diisocyanate 52.4g 14.19％ d dimethylolbutyric acid 28.8g 7.80％ e Trimethylolpropane 22.1g 6.00％ f N,N'-Dimethylethanolamine 16.3g 4.42％ g pentaethylene hexamine 14.3g 4.02％ h acetone 180g - i Deionized water 770g -

[0053] The above-mentioned water-based flexible handle coating is prepared according to the following process steps:

[0054]Component a was stirred and dehydrated at 85° C. under vacuum, and the stirring speed was 200 rpm. After the water content in component a is less than 200ppm, stop vacuuming and return to normal pressure. Keep stirring and add components b and c, keep the reaction at 85°C for 2h. Keep stirring...

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Abstract

The invention relates to waterborne coating feeling soft and a preparation method of the waterborne coating. The coating comprises water and a resin component, and the resin component comprises the following components in percentages by weight: 10-20% of aliphatic diisocyanate, 15-30% of HDI dimer, 30-50% of polytetrahydrofuran diols, 6-9% of a hydrophilic chain-extending agent, 3-6% of a multifunctional chain-extending agent, 3-6% of a neutralizer and 2-6% of a rear chain-extending agent. The prepared resin has excellent mechanical properties including wear resistance, scratch resistance andthe like, the coating is a waterborne product, VOC is less than or equal to 150 g / L, and the waterborne coating feeling soft is environmentally friendly, can serve as high-resilience paint, and is used for wide fields; and in a synthetic process of the coating, a metal catalyst does not exist, flame retardancy is not required, and thus, the coating is safe.

Description

technical field [0001] The invention relates to the technical field of packaging coatings, in particular to a water-based flexible handle coating and a preparation method thereof. Background technique [0002] At present, the traditional flexible touch coatings used in the packaging industry (including soft substrates and rigid substrates) on the market are all oil-based products, and their formulations are all made of solvent-containing raw materials, and the VOC content is as high as 600-1000g / L, far exceeding the national paint The consumption tax exemption point is 420g / L. Therefore, it is of great significance to develop water-based flexible handle coatings with low VOC content in this field. [0003] Due to the difference in water-based synthesis process, stability and film-forming mechanism from oil-based products, existing water-based polyurethane emulsions are difficult to meet the requirements of flexible hand feeling, anti-fingerprint, and weather resistance, so ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D5/16C08G18/32C08G18/34C08G18/48C08G18/66C08G18/73C08G18/75C08G18/10
CPCC08G18/0823C08G18/10C08G18/3206C08G18/3228C08G18/348C08G18/4854C08G18/6692C08G18/722C08G18/73C08G18/755C08G18/758C09D5/1662C09D175/08C08G18/34C08G18/32
Inventor 董海普李斐王玉春谢允斌
Owner JIANGSU SHENGYING NEW MATERIAL
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