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US 5,512,619 AGranted
Dissipative curing and coating composition for concrete
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsDennis R. DeWacker, Leon Rosenberg, Nicholas J. Lacamera, Jr.
Life of this patent
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Abstract
A curing composition for concrete that is an effective water barrier and that is relatively easily removed contains an acrylic or a styrene polymer latex and a polysaccharide. The polysaccharide makes the coating composition susceptible to enzyme action and thus easily removable by flooding the surface of the coated concrete with a dilute solution of enzyme reactive with the polysaccharide.
Claims12
An aqueous concrete curing composition, consisting essentially of in admixture:
- a latex of a polymer having a glass transition of greater than 25.degree. C. and not more than 100.degree. C. and comprising the polymerization product of at least one monomer(s) selected from the group consisting of acrylic and styrene monomers, said polymer present in an amount of about 95-60% by weight of total solids of the curing composition,
- a coalescing agent;
- and
- a polysaccharide in an amount of about 5-40% by weight of total solids of the curing composition;
- the curing composition restricting the loss of water to not more than 0.55 kg/m.sup.2 in 72 hours.
2 more elements
An aqueous concrete curing composition, consisting essentially of in admixture:
- about 95-60% by weight of total solids of the curing composition of a polymer having a glass transition of greater than 25.degree. C. and not more than 100.degree. C. and comprising the polymerization product of at least one monomer(s) selected from the group consisting of acrylic and styrene monomers;
- about 5-40% by weight of total solids of the curing composition of a substantially cold water soluble polysaccharide selected from the group consisting of starches, celluloses and gums;
- and
- about 7-15% by weight of total solids of the curing composition of a coalescing agent;
- the curing composition restricting the loss of water to 0.55 kg/m.sup.2 in 72 hours.
2 more elements
A method for curing concrete, comprising:
- (a) applying to a concrete substrate a curing composition comprising in admixture about 95-60% by weight of total solids of the curing composition of a polymer comprising the polymerization product of at least one monomer(s) selected from the group consisting of acrylic and styrene monomers;
- and about 5-40% by weight of total solids of the curing composition of a polysaccharide, the curing composition restricting the loss of water to not more than 0.55 kg/m.sup.2 in 72 hours, thereby forming a film of the curing composition on the concrete substrate;
- (b) allowing the concrete to cure;
- and
- (c) removing the film from the concrete substrate.
2 more elements
A method for curing concrete, comprising:
- (a) applying to a concrete substrate a curing composition comprising in admixture about 95-60% by weight of total solids of the curing composition of a polymer comprising the polymerization product of at least one monomer(s) selected from the group consisting of acrylic and styrene monomers;
- and about 5-40% by weight of total solids of the curing composition of a polysaccharide, the curing composition restricting the loss of water to not more than 0.55 kg/m.sup.2 in 72 hours, thereby forming a film of the curing composition on the concrete substrate;
- (b) allowing the concrete to cure,
- (c) contacting the film with an aqueous solution of an enzyme
- reactive with the polysaccharide,
- (d) allowing the enzyme to degrade the polysaccharide;
- and
- (e) applying mechanical abrasion to the film after the enzyme
- has degraded the polysaccharide, thereby removing the film.
6 more elements
A method for curing concrete, comprising:
- (a) applying to a concrete substrate a curing composition comprising in admixture about 95-60% by weight of total solids of the curing composition of a polymer comprising the polymerization product of at least one monomer(s) selected from the group consisting of acrylic and styrene monomers;
- and about 5-40% by weight of total solids of the curing composition of a polysaccharide, the curing composition restricting the loss of water to not more than 0.55 kg/m.sup.2 in 72 hours, thereby forming a film of the curing composition on the concrete substrate;
- (b) allowing the concrete to cure;
- and
- (c) flooding the film with water, waiting a sufficient time for the water to dissolve the film and abrading the film, thereby removing the film.
2 more elements
Dependencies are inferred from the claim text.