Method for the synthesis of a copolymer, copolymer, rubber mixture, and use thereof

Patent metadata

Field	Value
Publication number	US-11098145-B2
Application number	US-201715810699-A
Country	US
Kind code	B2
Filing date	Nov 13, 2017
Priority date	May 12, 2015
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

Disclosed are processes for preparing a copolymer, a copolymer prepared by the process, a sulfur-crosslinkable rubber mixture, and the use of the sulfur-crosslinkable rubber mixture for production of motor vehicle tires. In one embodiment, the monomer has the formula: A-S-P, wherein A is a chemical group containing at least one aliphatic double bond, S is a sulfur atom, and P is a protecting group.

First claim

What is claimed is:

1. A process comprising:
preparing a copolymer which comprises:
free-radical copolymerization of a monomer of the following formula I) with at least one diene:
A-S-P  I)

wherein
A is a chemical group containing at least one aliphatic double bond,
S is a sulfur atom,
P is a protecting group selected from the group consisting of:
S(═O) 2 —R 1 , S—C(═S)—N—R 2 R 3 , C(═O)—R 4 , and N—R 5 R 6 ,
R 1 =alkyl, or benzyl,
R 2 and R 3 =alkyl, benzyl, or phenyl,
R 4 =alkyl,
R 5 =hydrogen atom (H), alkyl, benzyl, or phenyl,
R 6 =alkyl, benzyl, or phenyl, and

the at least one diene is selected from the group consisting of: 1,3-butadiene, 2-methylbuta-1,3-diene, 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 2,4-hexadiene, 1,3-hexadiene, 1,3-heptadiene, 1,3-octadiene, 2-methyl-2,4-pentadiene, cyclopentadiene, 2,4-hexadiene, 1,3-cyclooctadiene, and 2-chloro-1,3-butadiene; and,
wherein the monomer has a protected mercapto group;
preparing a sulfur-crosslinkable rubber mixture comprising the copolymer;
vulcanizing the sulfur-crosslinkable rubber mixture, wherein the protected mercapto group becomes deprotected during the vulcanizing and wherein the sulfur atom takes part in the vulcanizing:

provided the A-S-P is not 4-vinylbenzyl thioacetate.

2. The process of claim 1 , wherein A is a 4-vinylbenzyl group.

Assignees

• Continental Reifen Deutschland Gmbh

Inventors

• Herzog Katharina
• Mueller Lena
• Recker Carla
• Pruss Noa
• Conrad Cathrin Sonja
• Vana Phillipp

Classifications

• C08F212/14

  substituted by heteroatoms or groups containing heteroatoms · CPC title

• B29B7/7495

  for mixing rubber · CPC title

• B60C1/00

  Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition · CPC title

• C08K3/06

  Sulfur · CPC title

• B29D30/06

  Pneumatic tyres or parts thereof {(e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)} · CPC title