# US 4,396,751 A · Homo- and copolymers of 1,3-dienes containing reactive silyl groups, and their preparation and use

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- Number: US 4,396,751 A
- Document ID: US4396751A
- Status: Granted
- Kind: A
- Application number: 06/273,289
- Filed: 1981-06-15
- Granted: 1983-08-02
- Earliest claimed: 1980-07-30
- Assignees: Chemische Werke Huels Aktiengesellschaft
- Inventors: Wolfgang Kampf; Roland Streck; Horst G. Haag
- Web page: https://patentgrep.com/patent/US4396751A

## CPC

- C08C 19/25: Incorporating silicon atoms into the molecule
- C08C 19/28: Reaction with compounds containing carbon-to-carbon unsaturated bonds (graft polymers C08F279/00)
- C08C: TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS

## Abstract

A homo- or copolymer of a 1,3-diene having reactive silyl groups bound thereto, and containing 0.4-12% by weight of bound silicon, prepared by reacting at a temperature of 150.degree.-300.degree. C., a 1,3-diene homo- or copolymer, having less than 1% of its aliphatic double bonds conjugated and having a molecular weight (M.sub.n) of 400-8,000, with a silicon compound of the formula ##STR1## wherein R is an unsaturated aliphatic hydrocarbon residue of 2-20 carbon atoms, X is halogen, C.sub.1-6 alkoxy, C.sub.1-6 alkoxyalkoxy, C.sub.6-12 aryloxy, C.sub.1-8 alkanoyloxy, C.sub.1-6 ketoximato or C.sub.1-8 hydrocarbylamido, Y and Z independently are one of the X groups, hydrogen, alkyl of 1-8 carbon atoms, cycloalkyl of 5-12 carbon atoms, or optionally substituted phenyl.

## Claims

### Claim 1

A process for preparing a homo- or copolymer of a 1,3-diene carrying reactive silyl groups and having 0.4-12% by weight of bound silicon consisting essentially of, reacting of 1,3-diene homo- or copolymer having a molecular weight (Mn) of 400-8,000 and containing less than 1% of its aliphatic double bonds in conjugation, at a temperature of 150.degree.-300.degree. C., with a silicon compound of the formula ##STR6## wherein R is an unsaturated aliphatic hydrocarbon residue of 2-20 carbon atoms,
X is halogen, C.sub.1-6 alkoxy, C.sub.1-6 alkoxyalkoxy, C.sub.6-12 aryloxy, C.sub.1-8 alkanoyloxy, C.sub.1-6 ketoximato or C.sub.1-12 hydrocarbylamido,
Y and Z independently are one of the X groups, hydrogen, alkyl of 1-8 carbon atoms, cycloalkyl of 5-12 carbon atoms, or optionally substituted phenyl.

### Claim 2 (depends on 1)

A process of claim 1, wherein the reaction temperature is 200.degree.-280.degree. C.

### Claim 3 (depends on 1)

A process of claim 1, wherein the starting diene polymer is a polybutadiene of a molecular weight (Mn) of 600-3,000.

### Claim 4 (depends on 1)

A process of claim 1, wherein R in the silicon compound is vinyl or allyl.

### Claim 5 (depends on 4)

A process of claim 4, wherein X in the silicon compound is halo or alkoxy.

### Claim 6 (depends on 4)

A process of claim 4, wherein the bound silicon content is of the product is 1-5% by weight.