Process for forming fire retardant polymers of bis (hydrocarbyl)

Details Process for forming fire retardant polymers of bis (hydrocarbyl) Process for forming fire retardant polymers of bis (hydrocarbyl)

1974-04-01

1976-11-23

Tillman, Murray

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

526278, 526291, 526296, 260881, 260885, 260886, 526345, C08L 2706, C08L 2708, C08L 2710

Patent

active

039937151

ABSTRACT:
There is disclosed a process for forming modified polymers of: (1) a bis(hydrocarbyl) vinylphosphonate; (2) optionally, a crosslinking monomer containing two or more ethylenically unsaturated bonds; and (3) optionally, one or more comonomers which contain one ethylenically unsaturated bond. The products formed by this process which contain any of the above mentioned monomers are substantially free of unreacted residual bis(hydrocarbyl) vinylphosphonate. The process comprises the post-addition of a monoethylenically unsaturated monomer, the monomer being selected from the group consisting of the vinyl and vinylidene chlorides and bromides and the C.sub.1 -C.sub.20 dialkyl esters of maleic and fumaric acids, to the polymerization medium containing the vinylphosphonate and any optional monomers after the percent conversion of monomers in the polymerization medium has exceeded about 40%.

REFERENCES:
patent: 3583956 (1971-06-01), Pointer et al.
patent: 3691127 (1972-09-01), Kraft et al.
patent: 3726839 (1973-04-01), Jin
patent: 3798287 (1974-03-01), Murayama et al.
patent: 3800007 (1974-03-01), Bafford

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