Curable resin and producing process therefor

Patent metadata

Field	Value
Publication number	US-10508169-B2
Application number	US-201615002658-A
Country	US
Kind code	B2
Filing date	Jan 21, 2016
Priority date	Feb 2, 2015
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

A curable resin obtained by reacting a polybasic anhydride with a reaction product of an epoxy resin with a phenol compound having an alcoholic hydroxyl group and an unsaturated monobasic acid, wherein an epoxy resin having a softening point of 93° C. or higher is used as the epoxy resin.

First claim

The invention claimed is:

1. A curable resin obtained by reacting a polybasic anhydride with a reaction product of an epoxy resin with a phenol compound having an alcoholic hydroxyl group and an unsaturated monobasic acid, wherein
a cresol novolac epoxy resin having a softening point of 94° C. or higher and 103° C. or lower is used as the epoxy resin,
wherein a hydroxyalkyl phenol or a hydroxyalkyl cresol is used as the phenol compound,
wherein an alkenyl carboxylic acid is used as the unsaturated monobasic acid,
wherein a dibasic anhydride is used as the polybasic anhydride,
wherein the curable resin has a double bond equivalent of 480 g/eq. or more and 620 g/eq. or less, and
wherein the curable resin has an acid value of 30 mgKOH/g or more and 120 mgKOH/g or less.

2. The curable resin according to claim 1 , wherein 0.15 moles or more and 0.5 moles or less of the phenol compound is reacted with 1 chemical equivalent of an epoxy group of the epoxy resin.

3. The curable resin according to claim 1 , wherein 0.5 moles or more and 0.85 moles or less of the unsaturated monobasic acid is reacted with 1 chemical equivalent of an epoxy group of the epoxy resin.

4. The curable resin according to claim 1 , wherein 0.8 moles or more and 1.1 moles or less of the phenol compound and the unsaturated monobasic acid in total is reacted with 1 chemical equivalent of an epoxy group of the epoxy resin.

5. The curable resin according to claim 1 , wherein 0.1 moles or more and 1.1 moles or less of the polybasic anhydride is reacted with 1 chemical equivalent of a hydroxyl group of the reaction product.

6. A curable resin composition comprising the curable resin according to claim 1 and a polymerization initiator.

7. A cured product obtained by curing the curable resin composition according to claim 6 .

8. A cured product obtained by curing the curable resin according to claim 1 .

9. A process for producing a curable resin comprising the steps of:
reacting a cresol novolac epoxy resin having a softening point of 94° C. or higher and 103° C. or lower with a phenol compound having an alcoholic hydroxyl group and an unsaturated monobasic acid to give a modified epoxy resin intermediate; and
reacting a polybasic anhydride with a hydroxyl group of the modified epoxy resin intermediate,
wherein a hydroxyalkyl phenol or a hydroxyalkyl cresol is used as the phenol compound,
wherein an alkenyl carboxylic acid is used as the unsaturated monobasic acid,
wherein a dibasic anhydride is used as the polybasic anhydride,
wherein the curable resin has a double bond equivalent of 480 g/eq. or more and 620 g/eq. or less, and
wherein the curable resin has an acid value of 30 mgKOH/g ore more and 120 mgKOH/g or less.

10. The process for producing the curable resin according to claim 9 , wherein 0.15 moles or more and 0.5 moles or less of the phenol compound is reacted with 1 chemical equivalent of an epoxy group of the epoxy resin.

11. The process for producing the curable resin according to claim 9 , wherein 0.5 moles or more and 0.85 moles or less of the unsaturated monobasic acid is reacted with 1 chemical equivalent of an epoxy group of the epoxy resin.

12. The process for producing the curable resin according to claim 9 , wherein 0.8 moles or more and 1.1 moles or less of the phenol compound and the unsaturated monobasic acid in total is reacted with 1 chemical equivalent of an epoxy group of the epoxy resin.

13. The process for producing the curable resin according to claim 9 , wherein 0.1 moles or more and 1.1 moles or less of the polybasic anhydride is reacted with 1 chemical equivalent of the hydroxyl group of the reaction product.

Assignees

• Nippon Catalytic Chem Ind

Inventors

• Yoshida Masatoshi
• Otsuki Nobuaki

Classifications

• C08G59/1438 Primary

  containing oxygen · CPC title

• C08G59/1494 Primary

  followed by a further chemical treatment thereof · CPC title

• C08G59/4223 Primary

  aromatic · CPC title

• C08G59/1444

  Monoalcohols · CPC title

• C08G59/1455

  Monocarboxylic acids, anhydrides, halides, or low-molecular-weight esters thereof · CPC title