Mercaptosilane polymer mixture

Patent metadata

Field	Value
Publication number	US-9512306-B2
Application number	US-201414759336-A
Country	US
Kind code	B2
Filing date	Feb 4, 2014
Priority date	Mar 4, 2013
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

The invention relates to mercaptosilane-polymer blends comprising at least one mercaptosilane of the general formula I

and at least one polymer selected from the group of polypropylene, polyethylene and ethylene-vinyl acetate. They are produced by mixing the mercaptosilane of the general formula I with the polymer.

They can be used in rubber mixtures.

First claim

The invention claimed is:

1. A mercaptosilane-polymer blend, comprising at least one mercaptosilane of formula I:

wherein
R 1 is an alkyl polyether group —O—(R 5 —O) m —R 6 , where R 5 is identical or different and is a branched or unbranched, saturated or unsaturated, aliphatic divalent C1-C30 hydrocarbon group, m is on average from 1 to 30, and R 6 comprises at least 1 C atom and is an unsubstituted or substituted, branched or unbranched monovalent alkyl, alkenyl, aryl or aralkyl group,
R 2 is identical or different and is an R1, C1-C12 -alkyl or R 7 O group, where R 7 is H, methyl, ethyl, propyl, C9-C30 branched or unbranched monovalent alkyl, alkenyl, aryl, or aralkyl group or (R 8 ) 3 Si group, where R 8 is C1-C30 branched or unbranched alkyl or alkenyl group,
R 3 is a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic divalent C1-C30 hydrocarbon group, and
R 4 is H, CN or (C═O)—R 9 , where R 9 is a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic monovalent C1-C30 hydrocarbon group; and
at least one polymer selected from the group consisting of polypropylene, polyethylene, and mixtures thereof.

2. The mercaptosilane-polymer blend of claim 1 , comprising a mixture of mercaptosilanes of the formula I.

3. The mercaptosilane-polymer blend of claim 2 , wherein the mixture of mercaptosilanes of the formula (I) comprises

4. The mercaptosilane-polymer blend of claim 1 , wherein the at least one mercaptosilane of formula I further comprises products of the hydrolysis and/or condensation of the mercaptosilanes of formula I.

5. The mercaptosilane-polymer blend of claim 1 , wherein a molar mass of the polymer is from 50 000-1 000 000 g/mol.

6. A process for producing the mercaptosilane-polymer blend of claim 1 , the process comprising mixing the at least one mercaptosilane of formula I with the at least one polymer selected from the group consisting of polypropylene, polyethylene, and mixtures thereof.

7. The process of claim 6 , wherein the mixing occurs with a ploughshare mixer.

8. A rubber mixture, comprising the mercaptosilane-polymer blend of claim 1 .

9. A rubber mixture, comprising
(A) at least one rubber,
(B) at least one filler, and
(C) the at least one mercaptosilane-polymer blend of claim 1 .

10. A process for producing the rubber mixture of claim 9 , the process comprising mixing the at least one rubber, the at least one filler, the at least one mercaptosilane-polymer blend, and optionally at least one other rubber auxiliary in a mixing assembly.

11. A moulding produced from the mercaptosilane-polymer blend of claim 1 .

12. An article produced from the mercaptosilane-polymer blend of claim 1 , the article selected from the group consisting of a tire, a tire tread, a cable sheathing, a hose, a drive belt, a conveyor belt, a roll covering, a shoe sole, a sealing ring, and a damping element.

13. The rubber mixture of claim 8 , wherein the mercaptosilane-polymer blend comprises polypropylene.

14. The rubber mixture of claim 8 , wherein the mercaptosilane-polymer blend comprises polyethylene.

15. The rubber mixture of claim 13 , wherein the mixture of mercaptosilanes of formula (I) in the mercaptosilane-polymer blend comprises:

16. The rubber mixture of claim 14 , wherein the mixture of mercaptosilanes of formula (I) in the mercaptosilane-polymer blend comprises:

Assignees

• Evonik Degussa Gmbh

Inventors

• Peterle Torsten
• Blume Anke
• Monkiewicz Jaroslaw
• Korch Andrea
• Tschernjaew Juri
• Kunowa Kathrin
• Klose Michael

Classifications

• C08L23/12

  Polypropene · CPC title

• C08L31/04

  Homopolymers or copolymers of vinyl acetate · CPC title

• C08K3/36

  Silica · CPC title

• C08K5/548

  containing sulfur {(C08K5/5477 takes precedence)} · CPC title

• B60C1/00 Primary

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