Organopolysiloxane sized paperboards for gypsum wallboards

Details Organopolysiloxane sized paperboards for gypsum wallboards Organopolysiloxane sized paperboards for gypsum wallboards

1977-09-28

1980-05-20

Ives, P. C.

Stock material or miscellaneous articles

Composite

Of silicon containing

428314, 428511, 428449, 427209, 427211, 162164R, 525478, B32B 904

Patent

active

042040302

ABSTRACT:
Novel and improved paperboards useful for making gypsum wallboards, which are sized with a specific organopolysiloxane comprising mercaptoalkyl containing organosiloxane units and, optionally, methacryloxy-containing organosiloxane units in its molecular structure. The sizing compound is used in a relatively small amount and yet can exhibit an excellent effect within a very short time. The sized paperboards have adequately controllable moisture absorption as well as air permeability. They are used to cover or sandwitch a gypsum core to form a complete wallboard in a convenient and economical manner.

REFERENCES:
patent: 3389042 (1968-06-01), Bieri et al.
patent: 3878263 (1975-04-01), Martin
patent: 4070526 (1978-01-01), Colquhoun et al.

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