Smoke suppressant compositions for halogen-containing plastics a

Details Smoke suppressant compositions for halogen-containing plastics a Smoke suppressant compositions for halogen-containing plastics a

1989-04-10

1990-10-23

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524406, 524413, 524417, 524423, 524424, 524436, 524437, 524450, 524451, 524456, C08K 324, C08K 332

Patent

active

049653091

ABSTRACT:
A smoke suppressant additive for plastics capable of reducing the smoke development of the plastic without significantly effecting the appearance or integrity of the plastic, comprising: (i) about 1 to 8 parts zinc present as an inorganic compound, (ii) about 1 to 6 parts by weight magnesium present as an inorganic magnesium compound other than magnesium oxide, (iii) about 0.7 to 7 parts by weight molybdenum present as an inorganic molybdenum compound, and (iv) about 0 to 0.7 parts by weight copper present as an inorganic copper compound; all parts by weight based upon the total amount of the elements zinc, magnesium, molybdenum and copper in the composition.
Preferably, the smoke suppressant additive further comprises up to about 80 wt-% based upon the total weight of the composition, diluent.
The invention further comprises a method of incorporating a particulate flame retardant and/or smoke suppressant into a plastic, comprising the steps of: (i) physically attaching the active flame retardant and/or smoke suppressant onto a diluent without incurring any substantial chemical interaction between the retardant/suppressant and the diluent, and (ii) intimately admixing the physically coupled retardant/suppressant and diluent into the plastic.

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