Modified polyvinylchloride

• US 4,298,714 A
• Filed: 12/16/1980
• Issued: 11/03/1981
• Est. Priority Date: 12/16/1980
• Status: Expired due to Fees

• Current Assignee: Yeda Research and Development Co. Ltd. (Weizmann Institute of Science)
• Original Assignee: Yeda Research and Development Co. Ltd. (Weizmann Institute of Science)
• Inventors: Levin, Gideon, Vofsi, David
• Primary Examiner(s): Schofer, Joseph L.
• Assistant Examiner(s): Lipman, Bernard
• Application Number:
  US06/217,144
• Time in Patent Office: 322 Days
• Field of Search: 525/330, 525/350, 525/351
• US Class Current: 525/331.5
• CPC Class Codes: C08F 14/06 Vinyl chloride
• CPC Class Codes: C08F 8/34 Introducing sulfur atoms or sulfur-containing groups

Abstract

The present invention relates to modified polyvinylchloride, wherein part of the chlorine atoms are replaced by groups of the formula --S--CH₂ --CH₂ --R--(CH₂ --CH₂ --R)_n --Alk, wherein R is selected from oxygen, sulfur and --NH--, where R may also designate a bond, where Alk designates an alkyl group of up to 14 carbon atoms, and where n is zero or an integer of from 1 to 100, and to a process for the production of such modified polyvinylchloride polymers which comprises reacting an aqueous emulsion or suspension of polyvinylchloride in the presence of a solvent adapted to cause swelling of the PVC particles with a compound of the formula Alk--(CH₂ --CH₂ --R)_n --R--CH₂ --CH₂ --SH, wherein Alk, R and n are as defined above.

Claims

1. A modified polyvinyl chloride wherein part of the chlorine atoms are substituted by groups of the formula

View Dependent Claims (2, 3, 4, 5, 6, 7, 8)

2. A modified polymer according to claim 1, wherein R is oxygen.

3. A modified polymer according to claim 1, wherein the substituent groups are of the formula

4. A process for the production of modified polyvinyl chlorides defined in claim 1, which comprises reacting an aqueous suspension or emulsion of polyvinyl chloride, in the presence of a small quantity of a solvent adapted to cause swelling of the P.V.C. particles, with a compound of the formula

5. A process according to claim 4, wherein the solvent is selected from cyclohexanone, THF, methyl-ethyl ketone.

6. A process according to claim 4, wherein the reaction is effected at a temperature between 0°

and 100°

C.

7. A process according to claim 4, wherein the reactant used for the modification is a polyether thiolate.

8. A process according to claim 4, wherein the reactant used for the modification is selected from 2-(2'"'"'-butoxyethoxy)-ethyl thiolate and an alkyl-mercaptan.