Gypsum wallboard

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C - Chemistry, Metallurgy

04

B

154/114, 261/78.

C04B 24/28 (2006.01) B32B 13/08 (2006.01) C04B 28/14 (2006.01) E04C 2/04 (2006.01) E04C 2/26 (2006.01)

Patent

CA 2321331

Gypsum wallboard can be made lighter and less dense, without sacrificing strength, by adding to the gypsum slurry used in making the board a styrene butadiene polymer latex substantially stable against divalent ions in which the styrene butadiene polymer includes at least 0.25 wt.% of an ionic monomer.

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