US 10,329,203 B2Granted

Low dusting additive for joint compound

AssigneeHenry Company, LLC

InventorsAmba Ayambem, Daniel Kent

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Abstract

The present invention relates generally to wall repair compounds such as joint compounds, spackling compounds, and the like used to repair imperfections in walls or fill joints between adjacent wallboard panels. Particularly, the present invention relates to such a wall repair compound comprising a dust reduction additive (DRA) that reduces the quantity of airborne dust generated when the hardened compound is sanded. The dust reduction additive also imparts adhesion to the wall repair compounds to which it is added, for example to a joint compound. More specifically, this dust reduction additive is of sufficiently lighter shade to not impact the shade of the joint compound upon addition. In one embodiment, this invention relates to a non-foaming dust reduction additive that comprises paraffin and/or micro-crystalline wax-based emulsion.

Claims19

Dependent claims

A non-foaming dust reduction additive emulsion comprising colloidally-protected wax-based (CPWB) microstructures, wherein said CPWB microstructures comprise:

(A) a wax core,
wherein said wax core comprises a wax component and a tethering component,
wherein said wax component comprises at least one linear alkane wax defined by the general formula CnH2n+2, where n ranges from 13-80,
wherein said tethering component comprises at least one a PAFA ester carboxylate, wherein said polyhydric alcohol fatty acid (PAFA) ester carboxylate fatty acid chain is from about 4 to about 100 carbon atoms, and
(B) a polymeric shell,
wherein said polymeric shell comprises at least one polymer selected from polyvinyl alcohol, polyvinyl alcohol copolymers, polyvinyl alcohol terpolymers, polyvinyl acetate, polyvinyl acetate copolymers, polyvinyl acetate terpolymers, cellulose ethers, polyethylene oxide, polyethyleneimines, polyvinylpyrrolidone, polyvinylpyrrolidone copolymers, polyethylene glycol, polyacrylamides and poly (N-iso-propylamides), pullulan, sodium alginate, gelatin, starches, and combinations thereof.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/624,161Filed 15 Jun 2017 · us provisional application
Priority: 15 Jun 2016
Published: US 2017/0362482 A121 Dec 2017
Granted: 25 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

C04B 40/0039
Aspects relating to the mixing step of the mortar preparation: premixtures of ingredients
C04B 20/1033
Macromolecular compounds: obtained by reactions only involving carbon-to-carbon unsaturated bonds
C04B 20/1048
Macromolecular compounds: polysaccharides, e.g. cellulose, or derivatives thereof
C04B 26/02
Compositions of mortars, concrete or artificial stone, containing only organic binders , e.g. polymer or resin concrete: macromolecular compounds