C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
400/3026
C08K 5/53 (2006.01) C08K 5/5397 (2006.01) C08L 51/04 (2006.01) C08L 51/08 (2006.01) C08L 55/02 (2006.01)
Patent
CA 1167193
Abstract: FLAME RETARDANT POLYPHENYLENE ETHER RESIN COMPOSITIONS A polyphenylene ether resin composition compris- ing: (i) from 30 to 90 weight percent of a graft co- polymer free from polyphenylene ether homo- polymers prepared by polymerizing 20 to 200 parts by weight of styrene-type compound at a temperature in the range from 130°C to 200°C in the presence of 100 parts by weight of polyphenylene ether and 0.1 to 15 parts by weight of a radical initiator and (ii) 10 to 70 weight percent of a styrene-type compound polymer having a number average molecular weight in the range from 50,000 to 200,000; is rendered fire retardant by the addition of an effective amount of a phosphine oxide having the formula: Image wherein R1 may be the same or different radi- cals selected from the group consisting of hydrogen and the methyl radical, R2 is an alkyl radical of 4 to 8 carbon atoms and n is either zero or one.
403469
Fmc Corporation
Osler Hoskin & Harcourt Llp
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