Claims
- 1. A dipped article produced by the process which comprises dipping a mould in a coagulant and then in a rubber latex to thereby form a film of precipitated rubber on the surface of the coagulant coated mould and subsequently vulcanizing said precipitated rubber to form a dipped article, said rubber latex having an average rubber particle diameter of up to 200 nm, a solids content of 35 to 60% by weight, and a Defo value of less than 2,000 and having been prepared by polymerizing a monomer mixture consisting of
- (a) 85 to 50 parts by weight of at least one member selected from the group consisting of butadiene and isoprene,
- (b) 10 to 40 parts by weight of acrylonitrile or methacrylonitrile,
- (c) 0 to 40 parts by weight of styrene,
- (d) 0 to 10 parts by weight of at least one member selected from the group consisting of acrylamide, methacrylamide and their methylol derivatives and
- (e) 0.1 to 10 parts by weight of an .alpha.,.beta.-unsaturated carboxylic acid, in aqueous emulsion in the presence of
- (i) 0.5 to 6.0% by weight, based on the monomer mixture weight, of an alkarylsulphonate and
- (ii) 0 to 5% by weight, based on the monomer mixture weight, of at least one surface active substance, at a pH below 7 and then adding on completion of polymerization of said monomer mixture, alkali metal hydroxide to adjust the pH to above 8.
- 2. The dipped article of claim 1 wherein said polymerization is carried out at a pH of from 2.5 to 6.
- 3. The dipped article of claim 1 wherein the polymerization is carried out at a temperature of from 10 to 80.degree. C.
- 4. The dipped article of claim 1 wherein the polymerization is carried out in the presence of an initiator and a modifier.
- 5. The dipped article of claim 1 wherein the latex contains rubber with a Defo value of from 500 up to 2,000.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2347755 |
Sep 1973 |
DE |
|
Cross Reference To Related Application
This application is a continuation of application Ser. No. 506,986 filed Sept. 18, 1974 and now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (2)
Number |
Date |
Country |
740,498 |
Aug 1966 |
CA |
1,014,227 |
Dec 1965 |
GB |
Continuations (1)
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Number |
Date |
Country |
Parent |
506986 |
Sep 1974 |
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