# US 5,708,096 A · Polymer compounds and their use for the vulcanisation of halogen-containing rubbers

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- Number: US 5,708,096 A
- Document ID: US5708096A
- Status: Granted
- Kind: A
- Application number: 08/709,987
- Filed: 1996-09-09
- Granted: 1998-01-13
- Earliest claimed: 1995-09-18
- Assignees: Bayer Aktiengesellschaft
- Inventors: Rudiger Schubart; Rudiger Musch; Michael Happ
- Web page: https://patentgrep.com/patent/US5708096A

## CPC

- C08L 11/00: Compositions of homopolymers or copolymers of chloroprene
- C08J 3/226: {using a polymer as a carrier}
- C08K 5/0025: {Crosslinking or vulcanising agents; including accelerators}
- C08K 5/29: Compounds containing {one or more} carbon-to-nitrogen double bonds
- C08K 5/3442: having two nitrogen atoms in the ring
- C08K 5/37: Thiols
- C08L 23/283: Iso-olefin halogenated homopolymers or copolymers
- C08J 2421/00: Characterised by the use of unspecified rubbers
- C08L 7/00: Compositions of natural rubber
- C08L 9/00: Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L 9/06: Copolymers with styrene
- C08L 23/0853: Ethylene vinyl acetate copolymers
- C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers
- C08L 23/22: Copolymers of isobutene; Butyl rubber; Homopolymers or copolymers of other iso-olefins
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The polymer compounds according to the invention, comprising special amidines, mercapto compounds and elastomers, are mainly suitable for the production of thermally stable, halogen-containing vulcanized rubbers. The vulcanized, halogen-containing rubbers obtained by means of the polymer compounds are distinguished by a reduced tendency to undergo unwanted subsequent vulcanization and are stable towards thermal and oxidative degradation at high storage temperatures.

## Claims

### Claim 1

Polymer compounds consisting of
a) cyclic or acyclic amidines or a mixture thereof,
b) mercapto compounds of benzothiazole, benzoimidazole, benzopyrimidine, benzotriazine or a mixture thereof, and
c) ethylene/propylene rubbers (EPM), ethylene-propylene-diene rubbers (EPDM), ethylene-vinyl acetate rubbers (EVM), butadiene rubbers (BR), styrene-butadiene rubbers (SBR), natural rubbers (NR), butadiene-acrylonitrile rubber (NBR), butyl rubbers (IIR) or mixture thereof,
wherein components a) and b) are present in the compound in a molar ratio of 0.25:1 to 2:1, and the proportion of polymer binder c) is 90 to 10% by weight with respect to the total weight of components a) to c).

### Claim 2 (depends on 1)

The compounds as claimed in claim 1, wherein components a) and b) are present in the compound in a molar ratio of 0.5:1 to 1.5:1, and the proportion of polymer binder c) is 30 to 60% by weight with respect to the total weight of components a) to c).

### Claim 3 (depends on 1)

The compounds as claimed in claim 1, wherein component a) is 1,8-diazabicyclo-(5.4.0)-undecene-(7) (DBU) or 1.5 diazabicyclo-(4.3.0)-nonene-(5) (DBN).

### Claim 4 (depends on 1)

The compounds as claimed in claim 1, wherein component (b) is mercaptobenzimidazole or 4,5-methylbenzoimidazole.

### Claim 5 (depends on 1)

A compound containing vulcanised halogen-containing rubber wherein the rubber contains the polymer compounds as claimed in claim 1.

### Claim 6 (depends on 1)

A process which comprises vulcanising halogen-containing rubber wherein the rubber contains the polymer compounds as claimed in claim 1.

### Claim 7

Polymer compounds comprising
a) cyclic or acyclic amidines or a mixture thereof,
b) mercapto compounds of benzothiazole, benzoimidazole, benzopyrimidine, benzotriazine, or a mixture thereof, and
c) ethylene/propylene rubbers (EPM), ethylene-propylene-diene rubbers (EPDM), ethylene-vinyl acetate rubbers (EVM), butadiene rubbers (BR), styrene-butadiene rubbers (SBR), natural rubbers (NR), butadiene-acrylonitrile rubber (NBR), butyl rubbers (IIR), or a mixture thereof,
wherein components a) and b) are present in the compound in a molar ratio of 0.25:1 to 2:1, and the proportion of polymer binder c) is 90 to 10% by weight with respect to the total weight of components a) to c).

### Claim 8 (depends on 7)

The compounds as claimed in claim 7, wherein components a) and b) are present in the compound in a molar ratio of 0.5:1 to 1.5:1, and the proportion of polymer binder c) is 30 to 60% by weight with respect to the total weight of components a) to c).

### Claim 9 (depends on 7)

The compounds as claimed in claim 7, wherein component a) is 1,8-diazabicyclo-(5.4.0)-undecene-(7) (DBU) or 1.5 diazabicyclo-(4.3.0)-nonene-(5) (DBN).

### Claim 10 (depends on 7)

The compounds as claimed in claim 7, wherein component (b) is mercaptobenzimidazole or 4,5-methylbenzoimidazole.

### Claim 11 (depends on 7)

A compound containing vulcanised halogen-containing rubber wherein the rubber contains the polymer compounds as claimed in claim 7.

### Claim 12 (depends on 7)

A process which comprises vulcanising a halogen-containing rubber wherein the rubber contains the polymer compounds as claimed in claim 7.

### Claim 13

Polymer compounds consisting essentially of:
a) cyclic or acyclic amidines or a mixture thereof,
b) mercapto compounds of benzothiazole, benzoimidazole, benzopyrimidine, benzotriazine, or a mixture thereof, and
c) ethylene/propylene rubbers (EPM), ethylene-propylene-diene rubbers (EPDM), ethylene-vinyl acetate rubbers (EVM), butadiene rubbers (BR), styrene-butadiene rubbers (SBR), natural rubbers (NR), butadiene-acrylonitrile rubber (NBR), butyl rubbers (IIR) or a mixture thereof,
wherein components a) and b) are present in the compound in a molar ratio of 0.25:1 to 2:1, and the proportion of polymer binder c) is 90 to 10% by weight with respect to the total weight of components a) to c).

### Claim 14 (depends on 13)

The compounds as claimed in claim 13, wherein components a) and b) are present in the compound in a molar ratio of 0.5:1 to 1.5:1, and the proportion of polymer binder c) is 30 to 60% by weight with respect to the total weight of components a) to c).

### Claim 15 (depends on 13)

The compound as claimed in claim 13, wherein component a) is 1,8-diazabicyclo-(5.4.0)-undecene-(7) (DBU) or 1.5 diazabicyclo-(4.3.0)-nonene-(5) (DBN).

### Claim 16 (depends on 13)

The compounds as claimed in claim 13, wherein component (b) is mercaptobenzimidazole or 4,5-methylbenzoimidazole.

### Claim 17 (depends on 13)

A compound containing vulcanised halogen-containing rubber wherein the rubber contains the polymer compounds as claimed in claim 13.

### Claim 18 (depends on 13)

A process which comprises vulcanising a halogen-containing rubber wherein the rubber contains the polymer compounds as claimed in claim 13.