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Synthesis method of organosilicon-modified aqueous polyurethane acrylate

A technology of urethane acrylate and synthesis method, applied in the field of organosilicon-modified water-based urethane acrylate, can solve problems such as low strength, and achieve the effects of high hardness, strong yellowing resistance, and easy operation and control

Active Publication Date: 2012-11-21
东莞市贝特利新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyurethane prepared by aliphatic diisocyanate has the performance of anti-yellowing, but the polyurethane prepared by aliphatic cyanate has the disadvantage of low strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]Under nitrogen atmosphere, in a dry three-neck round bottom flask, add hexamethylene diisocyanate, polyether diol, and two-terminal hydroxybutyl polydimethylsiloxane, the molecular ratio of which is 2.5:1:1, and heat to 70 ℃ reflux, and measure the NCO content every 1 hour until it no longer changes. Cool down to 50°C, add dimethylolpropionic acid, heat up to 65°C and reflux until the dimethylolpropionic acid particles disappear. Add 0.2% dibutyl tin laurate and 0.1% cerium acetate mixture, hydroquinone, dropwise add hydroxyethyl acrylate, continue heating to 75°C and reflux, measure the NCO content every 1 hour until the NCO content disappears. Cool down to room temperature, add triethylamine under stirring, neutralize to about pH=6.5, slowly add a certain amount of deionized water dropwise under vigorous stirring, and finally obtain silicone-modified water-based polyurethane acrylate.

Embodiment 2

[0047] Under nitrogen atmosphere, in a dry three-neck round bottom flask, add 4,4'-diisocyanate dicyclohexylmethane, polyether diol, two-terminal hydroxybutyl polydimethylsiloxane, the molecular ratio is 2.5 : 1: 1, heat to 80°C and reflux, measure the NCO content every 1 hour until there is no change. Cool down to 50°C, add dimethylolpropionic acid, heat up to 65°C and reflux until the dimethylolpropionic acid particles disappear. Add a mixture of 0.1% dibutyltin laurate and 0.2% cerium acetate, hydroquinone, dropwise add hydroxyethyl acrylate, continue heating to 75°C and reflux, measure the NCO content every 1 hour until the NCO content disappears. Cool down to room temperature, add triethylamine under stirring, neutralize to about pH=6.5, slowly add a certain amount of deionized water dropwise under vigorous stirring, and finally obtain silicone-modified water-based polyurethane acrylate.

Embodiment 3

[0049] Under nitrogen atmosphere, in a dry three-neck round bottom flask, add 4,4'-diisocyanate dicyclohexylmethane, polyether diol, two-terminal hydroxybutyl polydimethylsiloxane, the molecular ratio is 2.5 : 1: 1, heat to 70°C and reflux, measure the NCO content every 1 hour until it does not change. Cool down to 50°C, add dimethylolpropionic acid, heat up to 65°C and reflux until the dimethylolpropionic acid particles disappear. Add 0.3% dibutyl tin laurate, 0.2% yttrium acetate, and hydroquinone, dropwise add hydroxyethyl methacrylate, continue heating to 80°C and reflux, and measure the NCO content every 1 hour until the NCO content disappears. Cool down to room temperature, add triethylamine under stirring, neutralize to about pH=6.5, slowly add a certain amount of deionized water dropwise under vigorous stirring, and finally obtain silicone-modified water-based polyurethane acrylate.

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Abstract

The invention provides a synthesis method of organosilicon-modified aqueous polyurethane acrylate, which takes different aliphatic diisocyanates, alcoholic hydroxyl-terminated polysiloxane and acrylic acid monomer as main raw materials, and utilizes a stepwise synthesis method. The stepwise synthesis method comprises the following steps of: synthesizing organosilicon-modified polyurethane, introducing a hydrophilic group, and introducing the acrylic acid monomer, wherein a mixed solution of dibutyl tin laurate and organic carboxylic acid rare earth is taken as a catalyst for reflowing at the certain temperature so as to optimize the reaction condition; therefore, the invention provides a synthesis method of photo-cured aqueous polyurethane acrylate with great performances of yellowing resistance, high hardness and the like. The invention has the characteristics of high yield, easy operation and control and the like.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and specifically provides a method of obtaining silicone-modified water-based polyurethane acrylic acid by using different aliphatic diisocyanates, alcohol hydroxyl-terminated polysiloxanes, and acrylic monomers as main raw materials through a step-by-step synthesis method. ester method. Background technique [0002] The traditional oil-based polyurethane acrylate curing system has deficiencies in environmental protection, human health, process operation and film performance control, especially the diluent monomer is irritating to human skin and eyes, and has a bad smell and is relatively expensive. The water-based photocurable polyurethane acrylate inherits and develops the advantages of the traditional curing system. Compared with the oily polyurethane acrylate curing system, it has the advantages of low cost, low viscosity, non-toxic and non-irritating, etc. Chemicals, low temperature resist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/67C08G18/66C08G18/61C08G18/48C08G18/24C08G18/22
Inventor 曾建伟唐世英殷永彪汤胜山
Owner 东莞市贝特利新材料有限公司
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