Process for lightening plasterboards

Details Process for lightening plasterboards Process for lightening plasterboards

2007-05-22

2007-05-22

Kuhns, Allan R. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

C106S680000, C106S781000, C156S039000, C264S042000

Reexamination Certificate

active

10469857

ABSTRACT:
Process for the manufacture of plasterboards exhibiting a core density of less than 0.77 comprising the stages of the formation of a foam from water and a surfactant composed of at least one alkyl sulphate of formula H(CH2)nOSO3−M+, in which n is a number between 6 and 16, M is a monovalent cation and the mean number of carbon atoms nmis from 9 to 10, and the introduction of the foam obtained into a plaster slurry, characterized in that the amount of surfactant introduced does not exceed 0.32 g/l of plaster slurry. Application to the manufacture of lightened plasterboards.

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patent: 4156615 (1979-05-01), Cukier
patent: 4618370 (1986-10-01), Green et al.
patent: 5158612 (1992-10-01), Savoly et al.
patent: 5240639 (1993-08-01), Diez et al.
patent: 5643510 (1997-07-01), Sucech
patent: 5714001 (1998-02-01), Savoly et al.
patent: 7033431 (2006-04-01), Martin et al.
patent: 95/16515 (1995-06-01), None
patent: 99/08978 (1999-02-01), None
patent: 00/06518 (2000-02-01), None

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