Post chlorinated vinyl chloride copolymers

• US 3,925,337 A
• Filed: 07/21/1972
• Issued: 12/09/1975
• Est. Priority Date: 07/31/1969
• Status: Expired due to Term

• Current Assignee: Pacific Western Resin Company
• Original Assignee: Charles A. Heiberger
• Inventors: Heiberger, Charles A.
• Primary Examiner(s): Levin, Stanford M.
• Application Number:
  US05/273,936
• Time in Patent Office: 1,236 Days
• Field of Search: 260/87.5R,87.5C
• US Class Current: 525/331.6
• CPC Class Codes: C08F 10/00 Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• CPC Class Codes: C08F 14/00 Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
• CPC Class Codes: C08F 8/20 Halogenation
• CPC Class Codes: C08L 27/24 halogenated

Abstract

Modified vinyl chloride polymers, having elevated heat deflection temperatures, are provided by the post-chlorination of vinyl chloride-propylene copolymers.

Claims

1. A POST-CHLORINATED VINYL CHLORIDE-PROPYLENE COPOLYMER HAVING A HEAT DEFLECTION TEMPERATURE OF AT LEAST 185*F, A CHLORINE CONTENT OF 60% TO 73% BY WEIGHT AND A MELT FLOW VALUE OF FROM 0.1 DG./MIN. TO 250 DG./MIN/ SAID POSTCHLORINATED COPOLYMER PREPARED FROM A VINYL CHLORIDE-PROPYLENE COPOLYMER HAVING A PROPYLENE CONTENT OF FROM ABOUT 2% TO ABOUT 12% BY WEIGHT, A VINYL CHLORIDE CONTENT OF FROM ABOUT 88% TO ABOUT 98% BY WEIGHT, AN INTRINSIC VISCOSITY OF 0.45 DL./G. TO 12 DL./G. AND A MELT FLOW VALUE OF 0.3 TO 1000 DG./MIN.

2. A composition as described in claim 1 wherein the heat deflection temperature is at least 212*F.

3. A post-chlorinated vinyl chloride-propylene copolymer as defined in claim 1, having properties within the ranges recited such that log MFR 6.58 + 0.17 Square Root P - 4.31 N -0.04HDT wherein MFR is the melt flow rate in dg./min., HDT is the heat deflection temperature in * C of the post-chlorinated copolymer, and wherein P is the propylene content in weight percent and N is the intrinsic viscosity of the copolymer subjected to post-chlorination.

4. A rigid resinous composition adapted to be thermomolded to provide a shaped article which comprises a post-chlorinated vinyl chloride-propylene copolymer and from about 0.1 to 10% by Weight of a stabilizer and a lubricant, said post-chlorinated copolymer having a heat deflection temperature of at least 185*F, a chlorine content of 60% to 73% by weight and a melt flow value of from 0.1 dg./min. to 250 dg./min., the post-chlorinated copolymer prepared form a vinyl chloridepropylene copolymer having a propylene content of from about 2% to about 12% by weight, an intrinsic viscosity of 0.45 dl./g. to 1.2 dl./g. and a melt flow value of from 0.3 to 1000 dg./min.

5. A composition as described in claim 4 wherein the heat deflection temperature is at least 212*F.

6. A shaped article formed from a formable rigid composition comprising a post-chlorinated vinyl chloridepropylene copolymer and from about 0.1 to 10% by weight of a stabilizer and a lubricant, said post-chlorinated copolymer having a heat deflection temperature of at least 185*F, a chlorine content of 60% to 73% by weight and a melt flow value of from 0.1 dg./min. to 250 dg./min., the post-chlorinated copolymer prepared from a vinyl chloride-propylene copolymer having a propylene content of from about 2% to about 12% by weight, an intrinsic viscosity of 0.45 dl./g. to 1.2 dl./g. and a melt flow value of from 0.3 to 1000 dg./min.