Process for making a thermoplastic vulcanizate composition

A thermoplastic vulcanization and thermoplastic technology, which can solve problems such as difficulty in adding water, and achieve the effect of flexible selection

Inactive Publication Date: 2008-05-28
MOMENTIVE PERFORMANCE MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding water to the extruder at temperatures well above its boiling point is a difficult process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] The following materials were used in the examples and comparative examples:

[0050] Royalene(R) 694 EPDM rubber: terpolymer of ethylene, propylene, and non-conjugated diene, filled with 75 phr of clear, non-staining paraffin oil. Obtained from Uniroyal Chemical.

[0051] Royalene(R) 4697 EPDM rubber: terpolymer of ethylene, propylene, and non-conjugated diene, filled with 100 phr white hydrotreated paraffin oil. Obtained from Uniroyal Chemical.

[0052] Profax TM 6523: Commonly used propylene homopolymer. Obtained from Basell Service Co.

[0053] Engelhard(R) clay: a calcined and surface treated aluminosilicate available from Engelhard Co. under the name Translink(R).

[0054] Burgess(R) Clay: Untreated aluminosilicate.

[0055] Naugard(R) 10: Antioxidant for rubber.

[0056] Silcross(R) 11: A blend of Silquest(R) A-1100 aminosilane and white oil, available from the General Electric Company.

[0057] A single screw rotary and reciprocating kneader from BUSS wa...

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PUM

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Abstract

A process for making a thermoplastic vulcanizate includes blending a thermoplastic first polymer, an elastomeric second polymer, a carboxylic anhydride, a free radical generator, and a particulate reinforcing material to provide a first blend containing the thermoplastic first polymer and grafted elastomeric second polymer with the particulate reinforcing material dispersed therein, the particulate reinforcing material having sufficient surface moisture to permit coupling to the thermoplastic first polymer and the elastomeric second polymer upon reaction with a coupling agent; then, combining a coupling agent with the first blend for coupling the thermoplastic first polymer and / or grafted elastomeric second polymer with the particulate reinforcing material and / or crosslinking the grafted elastomeric second polymer.

Description

Background of the invention [0001] Thermoplastic elastomers (TPEs) have the functional properties of conventional thermoset rubbers, and they are also capable of being melted repeatedly, making them suitable for processing in conventional thermoplastic manufacturing equipment. Most TPEs consist of two phases, one phase consisting of a rubber material (elastomer) that is insoluble in the other phase, and the other phase being a flowable thermoplastic material. The rubber material exists as a dispersed phase and the thermoplastic material as a continuous phase. [0002] Although in principle it is not necessary to cross-link the rubber within a TPE, the use of cross-linking technology has proven effective in obtaining better chemical resistance, mechanical properties and better phase separation control. Such TPE compositions in which crosslinking reactions and processes are used to separate the phases into separate domains are known as thermoplastic vulcanizates (TPVs). In ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08L23/10
CPCC08L23/08C08L23/16C08K5/14C08L23/04C08L51/06C08L21/00C08K5/54C08L23/10C08L2666/06C08L2666/24C08J3/24C08L51/00C08K3/26C08L23/00
Inventor 路易斯·M·潘泽尔菲尔贝·E·拉姆达特
Owner MOMENTIVE PERFORMANCE MATERIALS INC
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