Aqueous construction compositions with improved water retention properties and a process for providing water retention properties to aqueous construction compositions
AssigneeRheox, Inc.
InventorsFred Whitton, Joseph Doolan
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Abstract
Water retention additives for aqueous construction systems including joint compounds are described which are the reaction product of monomers comprising carboxylic acid monomers, nonionic vinyl monomers and specific surfactant monomers. Processes for making such polymers are described as well as the use of aqueous construction systems using the polymers. The polymers are useful in joint compounds and a broad range of similar construction systems as cellulosic replacements.
Claims11
An aqueous joint compound composition with improved water retention properties having a viscosity of 140 Bradender units or more comprising:
- (a) a aqueous joint compound formulation containing a clay selected from the group consisting of attapulgite clay and bentonite clay, and,
- (b) from 0.1% to about 20% by weight based on the total weight of the aqueous joint compound composition of a polymer produced by a reaction of monomers comprising;
- (i) about 15 to 80 percent by weight of one or more C.sub.3 -C.sub.8 .alpha.,.beta.-ethylenically unsaturated carboxylic acid monomers;
- (ii) about 0 to 85 percent by weight of one or more copolymerizable vinyl non-ionic ethylenically unsatured monomers;
- and
- (iii) about 0.5 to 25 percent by weight of one or more non-ionic polyethoxylated hydrophobic surfactant monomers.
A process of preparing a aqueous joint compound composition having a viscosity of 140 Brabender units or more and providing said composition with improved water retention properties which comprises:
- (a) preparing a aqueous joint compound formulation containing a clay selected from the group consisting of attapulgite clay and bentonite clay,
- (b) mixing into said aqueous joint compound formulation from about 0.1% to about 20% by weight based on the total weight of the aqueous joint compound composition a polymer produced by a reaction of monomers comprising:
- (i) about 15 to 80 percent by weight of one or more C.sub.3 -C.sub.8 .alpha.,.beta.-ethylenically unsaturated carboxylic acid monomers;
- (ii) about 0 to 85 percent by weight of one or more copolymerizable vinyl non-ionic ethylenically unsaturated monomers;
- and
- (iii) about 0.5 to 25 percent by weight of one or more non-ionic polyethoxylated hydrophobic surfactant monomers.
Dependencies are inferred from the claim text.