Carpet backing adhesive
AssigneeUnited States Gypsum Company
InventorJay W. Palmer
Life of this patent
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Abstract
The coagulation of a styrene butadiene latex emulsion which normally occurs upon the introduction of gypsum as a filler in the preparation of an adhesive composition is prevented by the addition of ammonium sulfate or sodium sulfate or a mixture of the two to the emulsion prior to the addition of the gypsum.
Claims15
An adhesive composition comprising an aqueous styrene-butadiene latex emulsion, calcium sulfate dihydrate and from about 0.5% to about 5% by weight of at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate.
A method for imparting coagulation resistance to an aqueous styrene-butadiene latex emulsion to which gypsum is to be added, said method comprising mixing at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate with said emulsion prior to the addition of the gypsum.
A method of preparing a carpet backing adhesive comprising mixing an aqueous emulsion of a styrene-butadiene latex with, firstly, from about 0.5% to about 5%, based on the total weight of the adhesive, at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate, and secondly gypsum at ambient temperature.
A carpet comprising pile yarns anchored into a backing fabric by an adhesive mixture of an aqueous emulsion of a styrene-butadiene latex, gypsum and from about 0.5% to about 5% by weight of at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate.
Dependencies are inferred from the claim text.