US 12,006,262 B2
Plasticizer dedusting agents for joint compounds
Alexander J. Donovan, Lake Forest, IL (US); Tyler Kincaid, Chicago, IL (US); David Pelot, Chicago, IL (US); Richard B. Stevens, Village of Lakewood, IL (US); Robert H. Negri, Lake Villa, IL (US); and Naveen Punati, Lake Zurich, IL (US)
Assigned to UNITED STATES GYPSUM COMPANY, Chicago, IL (US)
Filed by UNITED STATES GYPSUM COMPANY, Chicago, IL (US)
Filed on Mar. 9, 2020, as Appl. No. 16/812,827.
Claims priority of provisional application 62/876,302, filed on Jul. 19, 2019.
Prior Publication US 2021/0017082 A1, Jan. 21, 2021
Int. Cl. C04B 28/14 (2006.01); C04B 24/04 (2006.01); C04B 24/38 (2006.01); C04B 103/00 (2006.01); C04B 103/30 (2006.01); C04B 103/44 (2006.01); C04B 111/00 (2006.01)
CPC C04B 28/14 (2013.01) [C04B 24/045 (2013.01); C04B 24/383 (2013.01); C04B 2103/0075 (2013.01); C04B 2103/30 (2013.01); C04B 2103/44 (2013.01); C04B 2111/00681 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A joint compound comprising:
calcium sulfate hemihydrate and/or at least one filler, wherein a total amount of the calcium sulfate hemihydrate and/or the at least one filler is at least 50 weight percent (wt %),
a binder at up to 15 wt % of the joint compound on a dry basis;
a polymer thickener at up to 3 wt % of the joint compound on a dry basis;
a plasticizer dedusting agent at 0.1 to 3 wt % of the joint compound on a dry (water free) basis, wherein the plasticizer dedusting agent is a mixture of diethylene glycol dibenzoate, propylene glycol dibenzoate, and dipropylene glycol dibenzoate; and
an additive up to 10 wt % of the drying-type joint compound on a dry basis;
having an absence of polyvinyl acetate,
having an absence of vinyl acetate,
having an absence of set retarder comprising a polymer composition including acrylic acid and acrylamide monomer units,
having an absence of wax emulsions,
having an absence of polymer coated wax core particulates;
having an absence of wax,
having an absence of paraffins;
having an absence of polyacrylamide;
having an absence of glycol; and
having an absence of copolymer of acrylamide and acrylic acid,
wherein the mixture of diethylene glycol dibenzoate, propylene glycol dibenzoate, and dipropylene glycol dibenzoate is the sole dedusting agent.