Silicone foams of improved fire resistance

Details Silicone foams of improved fire resistance Silicone foams of improved fire resistance

1992-01-09

1992-06-30

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

521 91, 521154, 521 51, C08J 934

Patent

active

051260832

ABSTRACT:
The specification describes and claims a method of making silicone foam compositions comprising the steps of introducing into a moulding cavity a quantity of foamable silicone compositions which is curable at room, or slightly elevated, temperature and bring about curing in the cavity to produce a cured silicone foam. The moulding cavity is closed prior to foaming thereby restricting expansion of the foam. The volume of the closed moulding cavity is a minimum 10% less than that which would be occupied by the composition if it foamed and cured at room temperature without restriction. Lower density foams formed by the above procedure may be converted into rigid elastomeric low density materials by a heat or microwave post cure. For a given composition and foam density the fire resistance of a foam produced by a method according to the invention is greater than a foam which is allowed to foam freely.

REFERENCES:
patent: 4613630 (1986-09-01), Bauman et al.
patent: 4760098 (1988-07-01), Miutel

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