Joint finishing adhesive

Patent metadata

Field	Value
Publication number	US-2016186019-A1
Application number	US-201514840288-A
Country	US
Kind code	A1
Filing date	Aug 31, 2015
Priority date	Dec 24, 2014
Publication date	Jun 30, 2016
Grant date	—

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 Bradbender 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 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 Bradbender Units and density is in the range from about 7.5 lbs/gal to about 10 lbs/gal.

2 . The adhesive composition of claim 1 , wherein the binder is selected from the group consisting of polyvinyl acetate (PVAc), polyvinyl alcohol (PVOH) and a combination of polyvinyl acetate with polyvinyl alcohol.

3 . The adhesive composition of claim 1 , wherein the amount of the binder is from 10% to 40% by weight on a solids basis of the wet composition.

4 . The adhesive composition of claim 1 , wherein the filler is selected from the group consisting of gelling clays, delaminating clays and any combination thereof.

5 . The adhesive composition of claim 1 , wherein the filler is selected from the group consisting of kaolin clay, attapulgite clay, and any combination thereof.

6 . The adhesive composition of claim 1 , wherein the amount of the filler is from 1% to 40% by weight.

7 . The adhesive composition of claim 1 , wherein the filler is a combination of kaolin clay in the amount from 5% to 15% and attapulgite clay in the amount from 0.5% to 1.5% by weight.

8 . The adhesive composition of claim 1 , wherein the rheological modifier is selected from the group consisting of cellulosic and associative thickeners.

9 . The adhesive composition of claim 1 , wherein the rheological modifier is selected from the group consisting of hydrophobically modified ethoxylated urethanes (HEUR), hydrophobically modified alkali-swellable emulsions (HASE), styrene-maleic anhydride terpolymers (SMAT), hydroxyethyl cellulose (HEC), ethylhydroxyethyl cellulose (EHEC), methylhydroxyethyl cellulose (MHEC), carboxymethyl cellulose (CMC), hydroxypropylmethyl cellulose (HPMC), alkyl hydroxypropyl cellulose ethers, hydroxypropyl methyl celluloses, xanthan gums, alginates, carrageenans, gum arabic, gum karaya, gum tragacanth, gum ghatti, guar gum, locust bean gum, tamarind gum, psyllium seed gum, quince seed gum, larch gum, pectin and its derivatives, dextrans, hydroxypropylcelluloses, and any combination thereof.

10 . The adhesive composition of claim 1 , wherein the rheological modifier is in an amount from about 0.01% to about 15%, by weight of the wet composition.

11 . The adhesive composition of claim 1 , wherein the composition comprises at least one hydroxyethyl cellulose based rheological modifier and at least one polyacrylate based associative thickener.

12 . The adhesive composition of claim 1 , wherein the composition further comprises at least one surfactant having a hydrophilic-lipophilic balance (HLB) from about 3 to about 20.

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

14 . The adhesive composition of claim 1 , wherein the composition further comprises at least one of the following: a coloring agent, a foaming agent, a defoaming agent, a buffering agent, an anti-sedimentation agent, wetting agent, plasticizer and a dispersant.

15 . The adhesive composition of claim 1 , wherein the binder is a combination Polyvinyl Acetate/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 in an amount from 0.01% to 5% by weight, and wherein the composition further comprises a thickener in an amount from 0.01% to 5% by weight, a surfactant in an amount from 0.01% to 1% and a defoamer in an amount from 0.01% to 1%.

16 . 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.

17 . The method of claim 16 , wherein the adhesive composition is also applied to the framing member.

18 . The method of claim 16 , 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.

19 . The method of claim 16 , 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.

20 . The method of claim 16 , 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

• C04B26/04 Primary

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

• C09J131/04 Primary

  Homopolymers or copolymers of vinyl acetate · CPC title

• C09J129/04 Primary

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

• C09J2433/00

  Presence of (meth)acrylic polymer · CPC title

• C04B26/18

  Polyesters; Polycarbonates · CPC title