Foam insulation and process for producing the same

Details Foam insulation and process for producing the same Foam insulation and process for producing the same

1985-11-14

1988-03-15

Anderson, Philip

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 42, 264 465, 264 50, 264DIG6, 521 841, 521 85, 521 91, 521 92, 5211091, 521122, 521125, 521134, 521141, 521149, C08J 930, C08J 932, B29C 3910, E04B 234

Patent

active

047313897

ABSTRACT:
The invention relates to foams for insulating cavities and structures, such as spaces between walls in houses. The inventive foam compositions are prepared in separate portions, generally comprising (A) cement and (B) foam. Air is added initially to foam one of the components or a mixture of components.
In a first embodiment, the first component comprises an aqueous solution of polyvinyl alcohol and a dispersant. This component is mechanically foamed by injection of air, for example. After the mechanical foaming a second, cement component is added to the first component. This second component comprises an aqueous solution, mixture or suspension of magnesium oxide and barium metaborate, and a dispersant.
In a second, preferred embodiment, the first component comprises an aqueous solution of polyvinyl alcohol and calcium chloride, which component is mechanically foamed by injection of air. After the foaming a second component is added, comprising an aqueous solution of Portland Cement, a dispersant and sodium metaborate.

REFERENCES:
patent: 2384611 (1945-09-01), Douthett
patent: 2921357 (1960-01-01), Fujii et al.
patent: 4100115 (1978-07-01), Baer
patent: 4644014 (1987-02-01), Thomson et al.

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