Alkali-soluble resin, alkali-soluble resin composition and method for producing same

Patent metadata

Field	Value
Publication number	US-2025270365-A1
Application number	US-202318850429-A
Country	US
Kind code	A1
Filing date	Mar 20, 2023
Priority date	Mar 25, 2022
Publication date	Aug 28, 2025
Grant date	—

Abstract

The present invention aims to provide an alkali-soluble resin and an alkali-soluble resin composition capable of providing a cured product having excellent heat discoloration resistance and a high refractive index, and to provide a production method capable of efficiently producing these. The present invention relates to an alkali-soluble resin having a structure represented by the following formula (1), the alkali-soluble resin containing an ammonium salt compound in an amount of 0.06% by mass or less relative to 100% by mass of the alkali-soluble resin,
the formula (1) being as follows:

wherein R 1 , R 2 , and R 3 are the same as or different from each other and each represent a hydrogen atom or a C1-C6 hydrocarbon group; R 4 represents a direct bond or a divalent organic group; R 5 , R 6 , R 7 , and R 8 are the same as or different from each other and each represent a hydrogen atom or Y, with at least one of R 5 to R 3 being Y, where Y is a group represented by the following formula (2); R 9 and R 10 are the same as or different from each other and each represent a substituent; W represents a divalent organic group; X represents a direct bond or a divalent organic group; l represents the number of R 9 and is an integer of 0 to 4; m represents the number of R 10 and is an integer of 0 to 4; when multiple R 9 s are present, they are the same as or different from each other, and when multiple R 10 s are present, they are the same as or different from each other; and n is an integer of 1 or more,
the formula (2) being as follows:

wherein R 11 represents a divalent organic group optionally containing a substituent.

First claim

1 . An alkali-soluble resin having a structure represented by the following formula (1),
the alkali-soluble resin comprising an ammonium salt compound in an amount of 0.06% by mass or less relative to 100% by mass of the alkali-soluble resin, the formula (1) being as follows:

wherein R 1 , R 2 , and R 3 are the same as or different from each other and each represent a hydrogen atom or a C1-C6 hydrocarbon group; R 4 represents a direct bond or a divalent organic group; R 5 , R 6 , R 7 , and R 8 are the same as or different from each other and each represent a hydrogen atom or Y, with at least one of R 5 to R 3 being Y, where Y is a group represented by the following formula (2); R 9 and R 10 are the same as or different from each other and each represent a substituent; W represents a divalent organic group; X represents a direct bond or a divalent organic group; 1 represents the number of R 9 and is an integer of 0 to 4; m represents the number of R 10 and is an integer of 0 to 4; when multiple R 9 s are present, they are the same as or different from each other, and when multiple R 10 s are present, they are the same as or different from each other; and n is an integer of 1 or more,
the formula (2) being as follows:

wherein R 11 represents a divalent organic group optionally containing a substituent.

2 . An alkali-soluble resin composition comprising:
the alkali-soluble resin according to claim 1 ; and an acid group-containing epoxy (meth)acrylate.

3 . A method for producing an alkali-soluble resin, the method comprising:
a step (a-1) of reacting a bisphenol compound with a bifunctional epoxy compound having a Gardner color scale based on JIS K 0071-2 of less than 12 and a melting point of 90° C. or higher; a step (a-2) of reacting a reaction product obtained in the step (a-1) with an unsaturated monobasic acid; and a step (a-3) of reacting a reaction product obtained in the step (a-2) with a polybasic acid anhydride, wherein the alkali-soluble resin obtained by the production method comprises an ammonium salt compound in an amount of 0.06% by mass or less relative to 100% by mass of the alkali-soluble resin.

4 . A method for producing an alkali-soluble resin composition, the method comprising:
a step (b-1) of reacting a bisphenol compound with a bifunctional epoxy compound having a Gardner color scale based on JIS K 0071-2 of less than 12 and a melting point of 90° C. or higher; a step (b-2) of adding an epoxy resin to a reaction product obtained in the step (b-1); a step (b-3) of reacting a mixture obtained in the step (b-2) with an unsaturated monobasic acid; and a step (b-4) of reacting a reaction mixture obtained in the step (b-3) with a polybasic acid anhydride, wherein the alkali-soluble resin composition obtained by the production method comprises an ammonium salt compound in an amount of 0.06% by mass or less relative to 100% by mass of the alkali-soluble resin.

5 . The method for producing an alkali-soluble resin composition according to claim 4 ,
wherein the epoxy resin is an aromatic epoxy resin.

6 . The method for producing an alkali-soluble resin composition according to claim 5 ,
wherein the aromatic epoxy resin is a bisphenol A epoxy resin.

Assignees

• Nippon Catalytic Chem Ind

Inventors

• Terada Takuma
• Otsuki Nobuaki
• Kimura Junya

Classifications

• G03F7/0047

  characterised by additives for obtaining a metallic or ceramic pattern, e.g. by firing · CPC title

• G03F7/027

  Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds (G03F7/075 takes precedence) · CPC title

• C08F290/064

  Polymers containing more than one epoxy group per molecule · CPC title

• C08G59/1466 Primary

  Acrylic or methacrylic acids · CPC title

• C08G59/066 Primary

  with chain extension or advancing agents · CPC title