Low density silicone foam compositions and method for making

Details Low density silicone foam compositions and method for making Low density silicone foam compositions and method for making

1983-03-17

1983-11-29

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521134, 521154, 525477, 528 10, 528 15, 528 31, 528 32, C08J 900

Patent

active

044181574

ABSTRACT:
A method of reducing the density of a silicone foam is provided comprising mixing with a foamable silicone composition having a base polydiorganosiloxane, an effective amount of a resinous copolymer selected from the group consisting of resinous copolymers of R.sub.3 SiO.sub.0.5 units and SiO.sub.2 units, and ratio of R.sub.3 SiO.sub.0.5 units ranging from 0.25 to 0.8:1, and resinous copolymers formed from R.sub.3 SiO.sub.0.5 units, R.sub.2.sup.1 SiO units and SiO.sub.2 units, the ratio of R.sub.3 SiO.sub.0.5 to SiO.sub.2 units ranging from 0.25 to 0.8:1 and the ratio of R.sub.2.sup.1 SiO to SiO.sub.2 units ranging from 0 to 0.1:1, and thereafter simultaneously foaming and curing the mixture.

REFERENCES:
patent: 3730931 (1973-05-01), Simoneou et al.
patent: 3923705 (1977-05-01), Smith
patent: 4026845 (1977-05-01), Kim et al.
patent: 4189545 (1980-02-01), Modic
patent: 4237236 (1980-12-01), Newitski

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