Imide silicone resin and production process therefor
A novel imide silicone resin is provided that on heat treatment is capable of easily forming a cured resin coating with excellent solvent resistance, humidity resistance and durability, as well as a production process therefor. The imide silicone resin has a structure of the formula (1) shown below, which is the addition reaction product of an organopolysiloxane with two silicon-bonded hydrogen atoms, and an imide compound with two olefin-based carbon-carbon double bonds
1. An imide silicone resin with a structure represented by a general formula (1) shown below:
wherein, each A is a bivalent organic group, each B represents, independently, a trivalent group selected from groups having the formulas shown below, in which two single bonds protruding in a substantially identical direction are bonded to an imide ring to form a ring structure and the third single bond is bonded to Y, Y is a bivalent group represented by formula (2) shown below, and n is an integer from 2 to 100:
wherein in each formula, X represents a hydrogen atom or a methyl group,
wherein, R 1 represents, independently, a monovalent organic group, and m is an integer from 0 to 100.
2. The imide silicone resin according to claim 1 , with a structure represented by formula (3) shown below:
wherein R 1 , A, m, and n are as defined above.
3. The imide silicone resin according to claim 1 , wherein said n is an integer from 3 to 70.
4. The imide silicone resin according to claim 1 , wherein said m is an integer from 0 to 60.
5. The imide silicone resin according to claim 1 , wherein each A is represented by the formula:
wherein, R 2 represents an unsubstituted or substituted monovalent hydrocarbon group of 1 to 10 carbon atoms, and k is an integer from 1–20.
6. The imide silicone resin according to claim 5 , wherein said R 2 represents an unsubstituted or substituted monovalent hydrocarbon group of 1 to 6 carbon atoms.
7. The imide silicone resin according to claim 5 , wherein said k is an integer from 1 to 10.
8. The imide silicone resin according to claim 1 , wherein said R 1 represents an unsubstituted or substituted monovalent hydrocarbon group of 1 to 12 carbon atoms.
9. The imide silicone resin according to claim 1 , wherein said R 1 represents an unsubstituted or substituted monovalent hydrocarbon group of 1 to 8 atoms.
10. A production process for the imide silicone resin according to claim 1 , comprising:
subjecting an organopolysiloxane represented by a general formula (4) shown below and in imide compound represented by a general formula (5) shown below to an addition reaction:
wherein, each R 1 represents, independently, a monovalent organic group, and m is an integer from 0 to 100,
wherein, A is a bivalent organic group, and each C represents, independently, a bivalent group selected from groups shown below:
11. The production process according to claim 10 , wherein in said imide compound represented by said general formula (5), said C is a bivalent group represented by a formula shown below:
wherein, X is as defined above.
12. The production process according to claim 10 , wherein said m is an integer from 0 to 60.
13. The production process according to claim 10 , wherein said organopolysiloxane is a dimethylpolysiloxane with both molecular chain terminals blocked with dimethyihydrogensiloxy groups, a copolymer of dimethylsiloxane and methyiphenylsiloxane with both molecular chain terminals blocked with dimethyihydrogensiloxy groups, a methyiphenylpolysiloxane with both molecular chain terminals blocked with dimethylhydrogensiloxy groups, or a mixture of two or more thereof.
14. The production process according to claim 10 , wherein said organopolysiloxane is:
wherein the formulas Me represents a methyl group.
15. The production process according to claim 10 , wherein said imide compound comprises at least one compound shown below:
16. A cured resin coating formed by curing an imide silicone resin according to claim 1 .