FLOWABLE ISOOLEFIN POLYMERS CONTAINING BROMINE AND PROCESS FOR PRODUCTION THEREOF

• US 3,817,956 A
• Filed: 01/18/1972
• Issued: 06/18/1974
• Est. Priority Date: 10/28/1971
• Status: Expired due to Term

• Current Assignee: Abdulhusain Harianawala
• Original Assignee: Abdulhusain Harianawala
• Inventors: Harianawala, Abdulhusain
• Primary Examiner(s): Schofer, Joseph L.
• Assistant Examiner(s): Holler, A.
• Application Number:
  US05/218,813
• Time in Patent Office: 882 Days
• Field of Search: 260/85.3C,85.3H,94.8,877
• US Class Current: 525/340
• CPC Class Codes: C08F 210/12 with conjugated diolefins, e.g. butyl rubber
• CPC Class Codes: C08F 8/00 Chemical modification by after-treatment graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C

Abstract

Brominated isoolefin polymers are ozonized in solution to yield flowable bromine-containing polymers of an isoolefin which may be cured with polyfunctional curing agents.

Claims

2. The process of claim 1 wherein the ozone treated polymer in solution is contacted with water prior to recovery of the flowable polymer.

3. The process of claim 1 wherein the isoolefin of the high molecular weight polymer is isobutylene and the conjugated diolefin is isoprene, said isobutylene being from about 95 to 99.5 mole per cent and said isoprene being from about 5 to 0.5 mole per cent of said high molecular weight polymer.

4. The process of claim 3 wherein the high molecular weight polymer contains from about 1 to about 12 weight per cent of bromine and said flowable polymer has a molecular weight of from about 1,000 to about 12,000.

5. The process of claim 1 wherein said polyfunctional curing agent is selected from toluene di-isocyanate and tris(1-(2 methyl)-aziridinyl) phosphite.