Heat expandable compositions
AssigneeRectorseal Corporation
InventorEva Ackerman
Life of this patent
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Abstract
A composition which, when subjected to heat, expands to form heat-insulating barriers comprises an expandable graphite, a fire retardant, and an inorganic intumescent filler such as clay dispersed in a resinous emulsion. Particularly desirable results are obtained with a fire retardant which is a C2-C8 alkyl diamine phosphate.
Claims20
A composition, which expands on exposure to heat to form a heat insulating barrier, which comprises:
- A) from 5 to 95% by weight of expandable graphite;
- B) from 1 to 70% by weight of a C2-C8 alkyl diamine phosphate fire retardant;
- C) from 25 to 90% by weight of a resinous emulsion having a Tg below −40° C.
A composition, expandable on exposure to heat to form a heat-insulating barrier, which comprises:
- A) from 5 to 95% by weight of expandable graphite;
- B) from 1 to 70% by weight of a fire retardant;
- C) from 1 to about 50% by weight of an inorganic filler dispersed in an emulsion of polyvinyl acetate or silicone.
An intumescent composition, expandable on exposure to heat to form a heat-insulating barrier, which comprises:
- A) from 5 to 95% by weight of expandable graphite;
- B) from 1 to 70% by weight of a fire retardant;
- C) from 1 to about 50% by weight of an inorganic filler dispersed in a resinous emulsion having a Tg below −40° C.
Dependencies are inferred from the claim text.