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Title: Higher modulus compositions incorporating particulate rubber

Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles. 2 figures.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
6661615
Assignee:
Composite Particles, Inc., Allentown, PA (United States) CHO; EDB-95-029742
Patent Number(s):
US 5382635; A
Application Number:
PPN: US 8-129227
Contract Number:
AC07-88ID12695
Resource Relation:
Patent File Date: 29 Sep 1993
Research Org:
Air Products and Chemicals Inc
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; FILLERS; FLEXURAL STRENGTH; RUBBERS; CHLORINATION; POLYMERS; CHEMICAL REACTIONS; ELASTOMERS; HALOGENATION; MATERIALS; MECHANICAL PROPERTIES; ORGANIC COMPOUNDS; ORGANIC POLYMERS 360601* -- Other Materials-- Preparation & Manufacture; 360603 -- Materials-- Properties

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