C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 24/02 (2006.01) C04B 11/00 (2006.01) C04B 16/00 (2006.01) C04B 24/00 (2006.01) C04B 40/00 (2006.01) C09D 191/06 (2006.01) C09K 3/18 (2006.01)
Patent
CA 2639962
Emulsions, useful for imparting water resistance to gypsum products are disclosed. The emulsions of the invention include at least one wax, an alkyl phenol and a hydrophyllic metallic salt, preferably magnesium sulfate. The emulsions of the invention do not require the addition of a starch compound and therefore exhibit enhanced stability even at higher solids content then compared to prior art emulsions.
L'invention concerne des émulsions utiles pour conférer une résistance à l'eau à des produits de gypse. Les émulsions selon l'invention comprennent au moins une cire, un alkyle phénol et un sel métallique hydrophyle, de préférence un sulfate de magnésium. Les émulsions selon l'invention ne nécessitent pas l'ajout d'un composé d'amidon et présentent donc une stabilité améliorée, même à des teneurs plus élevées en solides par comparaison avec les émulsions de l'art antérieur.
Hexion Specialty Chemicals Inc.
Momentive Specialty Chemicals Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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