RUBBER COMPOSITIONS INCLUDING SILICEOUS FILLERS

• US 20180079891A1
• Filed: 11/27/2017
• Published: 03/22/2018
• Est. Priority Date: 02/28/2010
• Status: Active Grant

• Current Assignee: Bridgestone Corporation
• Original Assignee: Bridgestone Corporation
• Inventors: Yan, Yuan-Yong, Qin, Zengquan, Pan, Xiao-Dong
• Granted Patent: US 10,392,497 B2
• Time in Patent Office: Days
• CPC Class Codes: C08C 19/44 of polymers containing metal atoms exclusively at one or both ends of the skeleton
• CPC Class Codes: C08F 36/04 conjugated
• CPC Class Codes: C08F 4/48 selected from lithium, rubidium, caesium or francium C08F4/461 takes precedence
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08K 5/5419 containing at least one Si—C bond
• CPC Class Codes: C08K 5/544 containing nitrogen
• CPC Class Codes: C08K 5/548 containing sulfur C08K5/5477 takes precedence
• CPC Class Codes: C08K 5/549 containing silicon in a ring
• CPC Class Codes: C08L 15/00 Compositions of rubber derivatives C08L11/00, C08L13/00 take precedence
• CPC Class Codes: C08L 7/00 Compositions of natural rubber
• CPC Class Codes: C08L 9/06 Copolymers with styrene

Abstract

Vulcanizates with desirable properties can be obtained from compositions incorporating polymers that include hydroxyl group-containing aryl functionalities, silica or other particulate filler(s) that contain or include oxides of silicon and a group or compound that can act to covalently bond the filler particles and the polymer. The group can be provided as a substituent of the filler particle, or a discreet compound can be provided in the composition.

Claims

1. A process for making a filled rubber composition, said process comprising blending

(1) a polymer that comprises

(i) ethylenic unsaturation and

(ii) pendent or terminal functionality which comprises an aryl group having at least two substituents defined by the formula —

OR, wherein R is H or a hydrolyzable group, or an oxidation product thereof; and

(2) filler particles that comprise oxides of silicon and bound residues of one or more compounds having the general formula YR¹L where L is a group that contains at least one Si—

O bond, R¹ is a hydrocarbylene group, and Y is a functionality that comprises a —

OH, —

SH, —

NHR², —

CN, —

C(O)R² or —

NCO group in which R² is H or a substituted or unsubstituted hydrocarbyl group.

2. The process of claim 1 wherein said functionality is at a terminus of said polymer.

3. The process of claim 2 wherein said functionality has the general formula

4. The process of claim 3 wherein the aryl group of said functionality is a phenyl group.

5. The process of claim 1 wherein said filler particles comprise at least one species of silica.

6. The process of claim 1 wherein Y is a functionality that comprises a —

SH group.

7. The process of claim 1 wherein said filled rubber composition further comprises at least one sulfide-containing silane coupling agent.

8. The process of claim 1 wherein the aryl group of said functionality is a phenyl group.

9. The process of claim 1 wherein said filler particles comprise at least one species of kaolin clay.

10. The process of claim 9 wherein Y is a functionality that comprises a —

SH group.

11. The process of claim 11 wherein said filler particles comprise at least one species having a surface free energy in water value of at least 300 mJ/m².

12. A process for making a filled rubber composition, said process comprising blending

(1) a polymer that comprises

(i) ethylenic unsaturation and

(ii) terminal functionality which comprises a phenyl group having at least two substituents defined by the formula —

OR, wherein R is H or a hydrolyzable group, or an oxidation product thereof;

(2) silica that comprises bound residues of one or more compounds having the general formula YR¹L where L is a group that contains at least one Si—

O bond, R¹ is a hydrocarbylene group, and Y is a functionality that comprises a —

OH, —

SH, —

NHR², —

CN, —

C(O)R² or —

NCO group in which R² is H or a substituted or unsubstituted hydrocarbyl group; and

(3) at least one sulfide-containing silane coupling agent.

13. A process for making a filled rubber composition, said process comprising blending

(1) a polymer that comprises

(i) ethylenic unsaturation and

(ii) terminal functionality which comprises a phenyl group having at least two substituents defined by the formula —

OR, wherein R is H or a hydrolyzable group, or an oxidation product thereof; and

(2) kaolin clay that comprises bound residues of one or more compounds having the general formula YR¹L where L is a group that contains at least one Si—

O bond, R¹ is a hydrocarbylene group, and Y is a functionality that comprises a —

OH, —

SH, —

NHR², —

CN, —

C(O)R² or —

NCO group in which R² is H or a substituted or unsubstituted hydrocarbyl group.

14. The process of claim 13 wherein Y is a functionality that comprises a —

SH group.