Polyurethane acrylate curable paint synthesizing method

A polyurethane acrylate and curing coating technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of color difference, harsh synthesis conditions, and many by-products, and achieve excellent wear resistance, simple method and low cost. Effect

Inactive Publication Date: 2015-04-22
CHONGQING XUXING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Urethane acrylate is generally produced by the reaction of diisocyanate, diol, and hydroxyethyl acrylate, and the synthesis conditions are harsh. In the actual production process, due to factors such as the selection of reaction temperature, improper reaction monomer ratio, and unreasonable control of process conditions, Generally, incomplete reaction, many by-products, poor hue, unreasonable molecular weight and molecular weight distribution are prone to occur in the synthesis of prepolymers, which will affect the performance of the prepared UV-curable coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] A method for synthesizing polyurethane acrylate cured coating, is characterized in that, comprises the steps:

[0023] The polyoxypropylene triol is subjected to decompression and vacuum treatment;

[0024] Add pretreated toluene diisocyanate and 1,6-hexanediol diacrylate into the three-necked bottle according to the formula, stir and mix evenly;

[0025] The polyoxypropylene triol is added in batches to the three-neck flask for reaction, and the content of isocyanate is determined by the di-n-butylamine method after the reaction;

[0026] Add p-hydroxyanisole and catalyst hydroxyethyl methacrylate into a three-necked flask for reaction, cool to room temperature, and discharge to obtain a polyurethane acrylate oligomer;

[0027] Weigh the urethane acrylate oligomer, reactive diluent monomer, coupling agent and other additives in the formula, put them into a beaker in turn, stir and disperse evenly, add a photoinitiator and stir evenly under the condition of avoiding li...

Embodiment 1

[0029] The polyoxypropylene triol is subjected to decompression and vacuum treatment at 100°C; add pretreated toluene diisocyanate and 1,6-hexanediol diacrylate in a three-necked flask at a volume ratio of 1:1, and heat at 60°C Stir and mix evenly under the condition of an oil bath; add polyoxypropylene triol into the three-necked flask in batches within 1 hour, raise the temperature to 60°C and react for 0.5 hour, after the reaction, use the di-n-butylamine method to measure the content of isocyanate; weigh Put the urethane acrylate oligomer, reactive diluting monomer, coupling agent and other additives in the formula quantity into the beaker in turn, stir for 5 minutes to disperse evenly, add a photoinitiator and stir for 5 minutes under the condition of avoiding light, and obtain urethane acrylic acid curing coating.

Embodiment 2

[0031] The polyoxypropylene triol is subjected to decompression and vacuum treatment at 110°C; add pretreated toluene diisocyanate and 1,6-hexanediol diacrylate in a three-neck flask at a volume ratio of 1:2, and heat at 65°C Stir and mix evenly under the condition of an oil bath; add polyoxypropylene triol to the three-neck flask in batches within 1.2 hours, raise the temperature to 65°C and react for 0.8 hours, after the reaction, use the di-n-butylamine method to measure the content of isocyanate; weigh Take the urethane acrylate oligomer, reactive diluent monomer, coupling agent and other additives in the formula, put them into a beaker in turn, stir for 8 minutes to disperse evenly, add a photoinitiator and stir for 6 minutes under the condition of avoiding light, and obtain urethane acrylic acid Cured paint.

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PUM

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Abstract

The invention relates to a synthesizing method of a polyurethane acrylate curable paint. The method comprises the following steps: polyoxypropylenetriol is subjected to a reduced-pressure vacuum treatment; pretreated toluene diisocyanate and 1,6-hexanediol diacrylate are added into a three-necked flask according to a formula, and are well mixed by stirring; polyoxypropylenetriol is added into the three-necked flask in batches and is subjected to a reaction; isocyano content is determined with a di-n-butylamine method after the reaction; hydroxyethyl methacrylate contaning p-hydroxyanisole and a catalyst is added into the three-necked flask and is subjected to a reaction; the product is cooled to room temperature and is discharged, such that a polyurethane acrylate oligomer is obtained; the polyurethane acrylate oligomer, an active diluting monomer, and auxiliary agents such as a coupling agent with amounts according to the formula are weighed and sequentially added into a flask; the mixture is well dispersed by stirring; a photoinitiator is added under a situation protected from light, and the mixture is well mixed, such that the polyurethane acrylate curable paint is obtained. The method provided by the invention is simple, and has low cost. The synthesized polyurethane acrylate curable paint has good adhesion, low-temperature resistance, and excellent wear resistance.

Description

technical field [0001] The invention relates to a synthesis technology of organic curing coatings, in particular to a synthesis method of polyurethane acrylate curing coatings. Background technique [0002] Polyurethane acrylate (PUA) is an important oligomer for the preparation of UV-curable coatings. The molecular structure of PUA oligomers has ether bonds and urethane bonds, and various hydrogen bonds can be formed between molecular chains. At the same time, there are flexible segments in the molecular chains. ,, so urethane acrylate has good adhesion to the substrate, has excellent low temperature resistance and abrasion resistance, and is widely used in UV curing coating systems. [0003] Urethane acrylate is generally produced by the reaction of diisocyanate, diol, and hydroxyethyl acrylate, and the synthesis conditions are harsh. In the actual production process, due to factors such as the selection of reaction temperature, improper reaction monomer ratio, and unreaso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/12C08G18/76C08G18/67C08G18/48
CPCC09D175/14C08G18/4829C08G18/4845C08G18/673C08G18/7614
Inventor 周祖渝
Owner CHONGQING XUXING CHEM
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