Process for preparing water-repellent articles from gypsum powde

Details Process for preparing water-repellent articles from gypsum powde Process for preparing water-repellent articles from gypsum powde

1988-01-11

1989-07-25

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

423555, 106109, C04B 2402, C04B 2424, C04B 2442

Patent

active

048510475

ABSTRACT:
The present invention relates to gypsum powders containing a hydrophobic agent and to water-repellent articles which are prepared from gypsum containing powered hydrophobic agents, in which the hydropohobic agents are prepared by spray-drying a mixture containing at least water, an organopolysiloxane having Si-bonded hydrogen and a water-soluble, film-forming polymer having a turbidity point of from 35.degree. to 98.degree. C.

REFERENCES:
patent: 3455710 (1969-07-01), Nitasche et al.
patent: 4704416 (1987-11-01), Eck et al.

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