Reinforced wallboard

Details Reinforced wallboard Reinforced wallboard

1974-08-28

1976-06-29

Lusignan, Michael R.

Coating processes

With post-treatment of coating or coating material

Heating or drying

427439, 428424, 428425, 428537, B05D 302, B05D 118, B32B 2740

Patent

active

039670163

ABSTRACT:
Paper-covered gypsum wallboard of increased racking resistance which has been strengthened by impregnation completely through the thickness of the cover paper, at least throughout certain critical areas, by coating and subsequent absorption thereinto of water-free polymeric solutions. A most significant improvement results from impregnation thereinto of a moisture-curing isocyanate resin, preferably a semiprepolymer of a polyisocyanate and a polyol in combination with a viscosity reducing solvent, such as mineral spirits or xylene, and a catalyst. Improved mobile home walls are formed with the impregnated areas of gypsum board back face paper disposed over and adhered to framing members with glue or the like.

REFERENCES:
patent: 3102835 (1963-09-01), White
patent: 3389008 (1968-06-01), Bailey
patent: 3428609 (1969-02-01), Chilvers et al.
patent: 3702781 (1972-11-01), Dahl
patent: 3726838 (1973-04-01), Eimer et al.
patent: 3824147 (1974-07-01), Baird

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