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Large-molecular weight polyurethane acrylic ester and synthesizing method thereof

A urethane acrylate and high molecular weight technology, applied in the field of high molecular weight urethane acrylate and its synthesis, can solve the problems of easy occurrence of pinholes, pitting, poor heat resistance and the like on the surface of light-cured coating

Inactive Publication Date: 2008-05-07
GUANGDONG BOSSIN NOVEL MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Urethane acrylate materials based on polyether backbones are usually difficult to withstand the high vacuum and high temperature environment of vacuum coating due to their poor heat resistance, and the surface of light-cured coatings is prone to defects such as pinholes and pitting

Method used

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  • Large-molecular weight polyurethane acrylic ester and synthesizing method thereof
  • Large-molecular weight polyurethane acrylic ester and synthesizing method thereof
  • Large-molecular weight polyurethane acrylic ester and synthesizing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 222.3 grams of IPDI in the 1000ml four-necked reaction flask, add 750.0 grams of PEGA (molecular weight is 1000 units, Unipol-210, United Carbon Company) that has been vacuum heated to remove water in the addition funnel, add 0.3 grams of dibutyl dilaurate Acid tin as catalyst, add 0.06 gram monochlorophosphate, mix with polyester diol, further remove residual water. Stir the isocyanate, feed polyester diol, heat slowly, control the temperature at 50-60°C, and wait for polyester diol to be added, stir and react at 80°C for 3 hours. 58.0 g of HEA monomer was added (0.2 g of p-methoxyphenol was added as a polymerization inhibitor), the temperature was raised to 80-90° C., and the reaction was stirred for 5 hours. Infrared spectrum detection reaction system NCO group reaction is complete. Viscosity 19700cps / 60℃, number average molecular weight 18400.

Embodiment 2

[0033] Follow the description of Example 1, but change PEGA to PBGA (molecular weight is 1000 units, Unipol-410, United Carbide Corporation), and the dosage is 750 grams. Resin viscosity is 21100cps / 60℃, molecular weight is 19100.

Embodiment 3

[0035] Follow the description of Example 1, but change PEGA to PHGA (molecular weight is 1000 units, Fomrez 66-112, Uniroyal Uniroyal Co., Ltd.), and the dosage is 750 grams. Resin viscosity is 23600cps / 60℃, molecular weight is 20300.

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PUM

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Abstract

The invention discloses macromolecule weight urethane acrylate, which is formed by reaction on the basis of aliphatic polyester diatomic alcohol with the molecular weight of 500 to 8000, aliphatic diisocyanate and hydroxy acrylic acid monomer; wherein, polyesterglycol comprises ring-shaped resin, and the mechanical property and hydrolysis resistance property of light curing film are improved. The molecular weight of synthetic resin is 10000 to 50000 units, and acrylic ester double keys on the two ends of molecule chain enable the resin to produce high-efficiency free radical aggregation linkage under the effect of photoinitiators through the radiation of ultraviolet light. The aggregation linkage product of the finished film has good flexility and adhesive force, extremely low light curing contraction percentage, higher tensile strength and breaking elongation with hydrolysis resistance property improved. The invention can be used as the main ingredient or assistant matieral of light curing paint, light curing printing ink and light curing adhesive.

Description

technical field [0001] The present invention relates to a class of high molecular weight polyurethane acrylate and its synthesis method, specifically, a class of polyurethane acrylate based on a certain molecular weight aliphatic polyester diol, which is irradiated by ultraviolet light under the coexistence of a photoinitiator , free radical polymerization can occur rapidly, thereby cross-linking and curing. The resin is mainly used for the preparation of light-cured coatings, light-cured inks, and light-cured adhesives. It is suitable for light-cured coatings on plastics and metals. It can provide cured films with extremely low curing shrinkage, excellent adhesion and flexibility, and high Hydrolysis resistance. It is a kind of photocurable resin with good market prospect and superior comprehensive performance. Background technique [0002] Urethane acrylate is a kind of resin based on the basic structure of polyurethane but functionalized by acrylate. It is usually in a ...

Claims

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Application Information

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IPC IPC(8): C08G18/42C08G18/30
Inventor 杨建文庞来兴
Owner GUANGDONG BOSSIN NOVEL MATERIALS TECH CO LTD
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