Suspension copolymer composition
AssigneeStauffer Chemical Company
InventorsPaul Kraft, Siegfried Altscher
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Abstract
Self-extinguishing, thermoplastic polymer compositions are prepared by the intimate admixture of a thermoplastic polymer with a copolymer of a halogen containing ethylenically unsaturated monomer and a phosphorus containing vinyl monomer, particularly a bis(hydrocarbyl)vinylphosphonate. The thus modified thermoplastic polymers display a high degree of flame retardance without any substantial changes in their physical properties including, for example, their clarity and hardness and the resulting compositions may be safely employed in any application requiring their possible exposure to fire or high temperatures.
Claims11
An aqueous suspension of particles of a suspension copolymer consisting of:
- 1. from about 2.5 to 99%, by weight of at least one bis (hydrocarbyl) vinylphosphonate having the structure:
- ##EQU3## wherein X is selected from the group consisting of hydrogen, halogen, cyano, aryl, C.sub.1 -C.sub.18 alkyl and ##EQU4## wherein R and R' are hydrocarbyl and substituted hydrocarbyl groups which can be the same, different or conjoint;
- and
- 2.
An aqueous suspension of particles of a suspension copolymer consisting of vinyl chloride and from about 10 to 40, by weight, of bis(beta-chloroethyl) vinylphosphonate.
An aqueous suspension of particles of a suspension copolymer consisting of from about 10 to 60%, by weight, of vinyl chloride;
- from about 10 to 60%, by weight, of vinyl bromide;
- and, from about 10 to 60%, by weight, of bis(beta-chloroethyl) vinylphosphonate.
Dependencies are inferred from the claim text.