Joint finishing adhesive

Patent metadata

Field	Value
Publication number	US-9683143-B2
Application number	US-201514840288-A
Country	US
Kind code	B2
Filing date	Aug 31, 2015
Priority date	Dec 24, 2014
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

Provided is an adhesive composition suitable for fortifying panel joints in construction, the adhesive composition comprising a polymeric binder, filler and thickener, wherein the binder is selected from acrylic acid polymers, acrylic acid copolymers, alkyds, polyurethanes, polyesters, epoxies, and combinations thereof and wherein the viscosity of the composition is the range from 100 to 200 Brabender Units and density is in the range from about 7.5 lbs/gal to about 10 lbs/gal. Methods of using the adhesive composition in wall assembly are provided as well.

First claim

What is claimed is:

1. An adhesive composition comprising a polymeric binder, filler, rheological modifier and associative thickener, wherein the binder is a combination of Polyvinyl Acetate with Polyvinyl Alcohol in an amount from 10% to 40% by weight, the filler is a combination of attapulgite clay in an amount from 0.5% to 1.5% by weight and kaolin clay in an amount from 5% to 15% by weight, the rheological modifier is at least one hydroxyethyl cellulose based rheological modifier in an amount from 0.01% to 20% by weight, the associative thickener is at least one polyacrylate based associative thickener and used in an amount from 0.01% to 20% by weight, and wherein the composition further comprises a surfactant in an amount from 0.01% to 1% and a defoamer in an amount from 0.01% to 1%; wherein the composition has a viscosity in the range from 100 to 200 Brabender Units and density in the range from 7.5 lbs/gal to 10 lbs/gal.

2. The composition of claim 1 , wherein the surfactant has a hydrophilic-lipophilic balance (HLB) from 3 to 20.

3. The composition of claim 1 , wherein the pH of the composition is adjusted to be in the range from 7.0 to 12.

4. The composition of claim 1 , wherein the composition further comprises a compound selected from the group consisting of a coloring agent, foaming agent, defoaming agent, buffering agent, anti-sedimentation agent, wetting agent, plasticizer, and any combination thereof.

5. A method for assembling a wall, the method comprising:
installing at least one framing member;
hanging two gypsum boards such as the two gypsum boards abut on at least one side and create a joint seam between the abutting two gypsum boards;
coating the joint seam with the adhesive composition of claim 1 ; and
applying at least one of a joint reinforcement tape and reinforcement trim over the joint seam coated with the adhesive.

6. The method of claim 5 , wherein the adhesive composition is also applied to the framing member.

7. The method of claim 5 , wherein the method is repeated as many times as needed to install as many gypsum boards as needed to create a wall of the predetermined size and shape.

8. The method of claim 5 , wherein adhesive composition is applied to coat the back side of at least one of the joint reinforcement tape and reinforcement trim, at least one of the joint reinforcement tape and reinforcement trim is then placed over and bonded to the joint seam.

9. The method of claim 5 , which further comprises applying at least one coat of a joint compound composition over the joint tape.

Assignees

• United States Gypsum Co

Inventors

• Negri Robert H
• Li Donghong
• Bury Rafael

Classifications

• C09J129/04 Primary

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• C09J131/04 Primary

  Homopolymers or copolymers of vinyl acetate · CPC title

• C04B26/04 Primary

  obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C09J2431/00

  Presence of polyvinyl acetate · CPC title

• C04B26/18

  Polyesters; Polycarbonates · CPC title