Decorated gypsum board with expanded inorganic particle coating

Details Decorated gypsum board with expanded inorganic particle coating Decorated gypsum board with expanded inorganic particle coating

1974-08-19

1976-10-05

Ansher, Harold

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428147, 428220, 428538, 427261, B32B 320

Patent

active

039845966

ABSTRACT:
A dried gypsum board article and a gypsum board to be dried, the latter comprising a wet gypsum core and a cover sheet to be securely laminated thereto in drying and a coating composition, the cover sheet having a porosity between about 90 and about 260 as determined by ASTM D 726-58; the coating composition comprising a pigment binder and expanded inorganic particles present in an amount sufficient to provide the coated cover sheet with a porosity of no higher number than about 2500 seconds as determined by ASTM D 726-58. Thereby the wet core, paper and coating composition are capable of being simultaneously dried without delaminating the sheet from the core.

REFERENCES:
patent: 2752275 (1956-06-01), Raskin et al.
patent: 3147177 (1964-09-01), Owens et al.
patent: 3427176 (1969-02-01), Moriva
patent: 3507684 (1970-04-01), Wallen

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