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Alkali soluble photosensitive modified polyacrylic acid prepolymer and preparation method thereof

A polyacrylic acid, alkali-soluble technology, used in applications, inks, household appliances, etc., can solve the problems of difficult control of the reaction process, easy delamination, and high viscosity, and achieve a simple and controllable reaction process, excellent effect, and strong weather resistance. Effect

Inactive Publication Date: 2012-03-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it mainly has the following disadvantages: high viscosity, high brittleness, high hardness, and poor adhesion to the substrate, resulting in defects in the etched circuit pattern, and poor dispersion with additives, and easy delamination, which limits Its application in the production of fine wire
Moreover, there are many restrictions on the conditions of the free radical copolymerization reaction, the reaction process is not easy to control, and many side reactions are easy to occur, resulting in a high viscosity of the prepolymer, which affects the photocuring rate and alkali solubility of the prepolymer

Method used

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  • Alkali soluble photosensitive modified polyacrylic acid prepolymer and preparation method thereof
  • Alkali soluble photosensitive modified polyacrylic acid prepolymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In a 250mL four-neck flask equipped with a stirrer, a condenser, and a thermometer, add 50g of polyacrylic acid with a number average molecular weight of 2016 and a degree of polymerization of 28, and 0.05g of a polymerization inhibitor 1,4-hydroquinone, and then pass nitrogen. Under protection, stir and heat up to 90°C. Then slowly add a mixture of 74g glycidyl methacrylate, 0.074g polymerization inhibitor 1,4-hydroquinone, and 2.2g catalyst triphenylphosphine dropwise through the dropping funnel, control the dropping speed, and keep about 1h to complete the dropping .

[0027] Then the temperature was raised to 100° C. to continue the reaction for 2 hours, and then the acid value of the system was measured. When the acid value is stable, stop heating, cool down and discharge the material, wash with distilled water at 40-50°C to remove residual polyacrylic acid in the product, take three times the volume of distilled water for each washing, and after washing three tim...

Embodiment 2

[0029] In a 250mL four-neck flask equipped with a stirrer, a condenser, and a thermometer, add 100g of polyacrylic acid with a number average molecular weight of 4824 and a degree of polymerization of 67, and 0.25g of a polymerization inhibitor p-hydroxyanisole, and under the protection of nitrogen, The temperature was raised to 80°C with stirring. Then slowly add a mixture of 80g allyl glycidyl ether, 0.2g polymerization inhibitor p-hydroxyanisole, and 0.4g catalyst N,N-dimethylbenzylamine dropwise through the dropping funnel, control the dropping speed, and keep dropping for about 1h. Finished adding.

[0030] Then the temperature was raised to 110° C. to continue the reaction for 3 hours, and then the acid value of the system was measured. When the acid value is stable, stop heating, cool down and discharge, wash with distilled water at 40-50°C to remove polyacrylic acid remaining in the product, take three times the volume of distilled water for each washing, wash 5 times...

Embodiment 3

[0032] In a 250mL four-neck flask equipped with a stirrer, a condenser, and a thermometer, add 100g of polyacrylic acid with a number average molecular weight of 3024 and a degree of polymerization of 42, and 0.2g of a polymerization inhibitor p-hydroxyanisole, and under the protection of nitrogen, The temperature was raised to 85°C with stirring. Then slowly add a mixture of 45g of glycidyl acrylate, 0.09g of polymerization inhibitor p-hydroxyanisole, and 0.84g of catalyst N,N-dimethylaniline dropwise through the dropping funnel, control the drop rate, and keep about 1h to complete the dropwise addition.

[0033] After the temperature was raised to 115° C. to continue the reaction for 2 hours, the acid value of the system was measured. When the acid value is stable, stop heating, cool down and discharge, wash with distilled water at 40-50°C to remove residual polyacrylic acid in the product, take three times the volume of distilled water for each washing, wash 4 times, separa...

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Abstract

The invention relates to an alkali soluble photosensitive modified polyacrylic acid prepolymer and a preparation method thereof. The alkali soluble photosensitive modified polyacrylic acid prepolymer is characterized by being prepared by performing part of ring-opening esterification reaction on a carboxy group of polyacrylic acid and substitutive epoxy ethane containing unsaturated carbon-carbondouble bonds. The alkali soluble photosensitive modified polyacrylic acid prepolymer is synthetised by a one-step method, is simple and controllable to operate, has good dispersity and low viscosity,and has an excellent effect when being used as a main ingredient of alkali soluble ink or a reactive diluent. No heteroatoms exist in a main chain of the alkali soluble photosensitive modified polyacrylic acid prepolymer. The alkali soluble photosensitive modified polyacrylic acid prepolymer has strong ultraviolet resistance and strong weather resistance.

Description

technical field [0001] The invention relates to an alkali-soluble photosensitive prepolymer and a preparation method thereof, belonging to the technical field of fine chemicals. Background technique [0002] In recent years, alkali-soluble photosensitive resin is a kind of photosensitive resin that has been developed rapidly. A variety of photo-imaging curing materials have been developed by taking advantage of its alkali solubility, such as liquid photosensitive solder resist, liquid photosensitive resist, etc., and have been widely used in the production of electronics and printing industries. [0003] In addition to the photosensitive group, the alkali-soluble photosensitive resin usually has some groups soluble in alkaline aqueous solution such as carboxyl group, amide group, sulfonic acid group and so on. There are three main methods for preparing alkali-soluble photosensitive prepolymers: 1. Using acrylic monomers, acid anhydrides or isocyanate compounds to modify var...

Claims

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Application Information

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IPC IPC(8): C08F20/06C08F8/14C09D11/10C09D11/101C09D11/102C09D11/107
Inventor 沈春晖孟泉尹凤银高山俊
Owner WUHAN UNIV OF TECH
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