Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles
Patent
1979-10-17
1981-10-27
Czaja, Donald E.
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
264115, 264120, 264122, 428524, 428920, 428702, 162152, 162166, 162167, 428310, 264120, B29J 100
Patent
active
042973112
ABSTRACT:
A method of producing an improved mineral board and the resulting product are disclosed. According to the present invention, the board is predominantly composed of perlite and a binder therefor, preferably urea-formaldehyde resin. The perlite is crushed after the composition is in its final shape but before the binder is set whereby its strength is substantially increased. The composition and process of making the board substantially reduce energy costs as compared to known methods for making wet-process mineral boards. The product composition may include up to 95% perlite by weight.
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patent: 2626864 (1953-01-01), Miscall et al.
patent: 3494824 (1970-02-01), Roberts
Zukov et al., Chem. Abs. 68: 24369g, 1968.
Budnikov et al., Chem. Abs. 70: 60392j, 1969.
Garalevicius et al., Chem. Abs. 75: 15258d, 1971.
Cameron John H.
Sherman Norman
Conwed Corporation
Czaja Donald E.
Hall James R.
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