Fire retardant polyvinyl chloride containing compositions

Details Fire retardant polyvinyl chloride containing compositions Fire retardant polyvinyl chloride containing compositions

1974-09-03

1976-09-28

McCamish, Marion E.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428286, 428290, 428323, 428330, 428522, 428538, 428539, 428921, B32B 1500, B32B 1700

Patent

active

039832902

ABSTRACT:
Compositions for preparing fire retardant polyvinyl chloride films characterized by their unusual combination of low flame spread, low smoke density, reduced permeability for vapor transmission and good cold crack resistance are described. These film forming compositions comprise a blend of about 40-55% polyvinyl chloride, about 7-20% of chlorinated polyethylene, about 4-20% of a phosphate ester plasticizer, about 3-7% of a magnesium hydroxide filler, about 3-6% of zinc borate and about 3-6% of an antimony trioxide fire retardant with various lubricants, pigments and stabilizers being included where desired. The films derived from the above blend enjoy particular utility in preparing vapor barrier constructions for use in the building trade.

REFERENCES:
patent: 2671950 (1954-03-01), Sukacev
patent: 2803729 (1957-08-01), Kohring
patent: 2915730 (1959-12-01), Davis
patent: 3217281 (1965-11-01), Griest et al.
patent: 3318757 (1967-05-01), Atwell
patent: 3575779 (1971-04-01), Chapman
patent: 3780141 (1973-12-01), Jin
patent: 3789047 (1974-01-01), Pruckmayr
Modern Plastics Encyclopedia, vol. 44, No. 1A, Sept., 1966, pp. 446, 448, 452-453.

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