# US 9,751,901 B2 · Method for preparing a polyorganosiloxane and a polyorganosiloxane

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- Number: US 9,751,901 B2
- Document ID: US9751901B2
- Status: Granted
- Kind: B2
- Application number: 15/376,830
- Filed: 2016-12-13
- Published: 2017-03-30
- Granted: 2017-09-05
- Earliest claimed: 2013-01-29
- Assignees: Shin-Etsu Chemical Co., Ltd.
- Applicants: Shin-Etsu Chemical Co., Ltd.
- Inventors: Takayuki Kusunoki; Tsutomu Kashiwagi
- Web page: https://patentgrep.com/patent/US9751901B2

## CPC

- C07F 7/1804: {Compounds having Si-O-C linkages (Si-O-acyl linkages C07F7/1896)}
- C07F 7/025: {without C-silicon linkages}
- C07F 7/188: {by reactions involving the formation of Si-O linkages}
- C08G 77/045: {containing less than 25 silicon atoms}
- C08G 77/12: containing silicon bound to hydrogen
- C08G 77/80: {Siloxanes having aromatic substituents, e.g. phenyl side groups}
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

A polyorganosiloxane resin represented by the following general formula (5): (R3SiO1/2)1′(R2SiO2/2)m′(RSiO3/2)n′(SiO4/2)o′ (5) wherein R is, independently of each other, a hydrogen atom or a monovalent hydrocarbon group having 1 to 18 carbon atoms, and optionally having an oxygen, halogen, nitrogen or sulfur atom; l′, m′ and o′ are, independently of each other, an integer of from 0 to 10,000; n′ is an integer of from 1 to 10,000; a total of l′, m′ and n′ is from 2 to 30,000; and at least one R is a hydrogen atom and at least one R is an —OX group in the molecule, wherein X is an alkyl group having 1 to 10 carbon atoms or an alkoxyalkyl group having 2 to 10 carbon atoms; and at least one hydrogen atom and at least one —OX group bond to one and the same silicon atom.

## Claims

### Claim 1

A polyorganosiloxane represented by the following formula (7):
wherein R1 is, independently of each other, a monovalent hydrocarbon group having 1 to 18 carbon atoms, and optionally having an oxygen, halogen, nitrogen or sulfur atom, R2 is, independently of each other, a hydrogen atom or R1; R3 is, independently of each other, R1 or an —OX group; Q is, independently of each other, R1, an —OX group or a group represented by the following (8):
provided that at least one of Q is the group represented by the aforesaid (8); X is, independently of each other, an alkyl group having 1 to 10 carbon atoms or an alkoxyalkyl group having 2 to 10 carbon atoms; d1 and d2 are, independently of each other, an integer of from 1 to 20; e1 is 1; e2 is 0 or 1; d3 is d1; p and p′ are, independently of each other, an integer of 1 or more; and the siloxane units in the square brackets may form a block structure or a random structure.

### Claim 2 (depends on 1)

The polyorganosiloxane according to claim 1, wherein p and p′ are 1 in said formulas (7) and (8).

### Claim 3 (depends on 1)

The polyorganosiloxane according to claim 1, represented by the following formula: