C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/72
C04B 24/14 (2006.01) C04B 28/14 (2006.01)
Patent
CA 1205829
READY-MIXED, SETTING-TYPE CEMENTITIOUS COMPOSITION HAVING SEPARATELY PACKAGED ACCELERATOR ABSTRACT OF THE DISCLOSURE A setting-type cementitious composition useful for a variety of applications, including, in a preferred embodiment, a joint compound for finishing joints between adjacent gypsum wallboards, comprising a first or cementitious component in pre-mixed form comprising an aqueous slurry of calcium sulfate hemihydrate and a retarder formed of two ingredients, one an organic retarder and the other a retarder which is a chelating agent, and a second or accelerator component comprising an accelerator material preferably in aqueous solution, the first component having an adequately long shelf life suitable for marketing, and, when the cemen- titious component is mixed with the second component for acceleration, the cementitious mixture acquires excellent application properties maintained throughout a suitable working period. The cementitious component hydrates after a suitable period to form a set material of excellent properties. When utilized as a joint compound, the first or cementitious component additionally includes a non-leveling or thixo- tropic agent and other ingredients conventionally utilized in joint compound compositions.
446446
Andersen James C.
Jakacki Edwin J.
Landwer Jonathan C.
Ogle Larry G.
Company United States Gypsum
Macrae & Co.
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