Coating composition

Abstract

A polymeric latex prepared by aqueous emulsion polymerization of a monomeric mixture comprising styrene and butadiene in the presence of a seed polymer prepared by aqueous emulsion polymerization of styrene and a salt of 2-acrylamido-2-methylpropanesulfonic acid.

What is claimed is:  
     
         1 . A polymeric latex prepared by aqueous emulsion polymerization of a monomeric mixture comprising styrene and butadiene in the presence of a seed polymer prepared by aqueous emulsion polymerization of styrene and a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         2 . The polymeric latex of  claim 1  wherein the aqueous emulsion for preparing the seed polymer further comprises butadiene.  
     
     
         3 . The polymeric latex of  claim 1  wherein the monomeric mixture further comprises a nonionic monomer.  
     
     
         4 . The polymeric latex of  claim 3  wherein the aqueous emulsion for preparing the seed polymer further comprises butadiene.  
     
     
         5 . The polymeric latex of  claim 1  wherein the aqueous emulsion for preparing the seed polymer further comprises (meth)acrylonitrile.  
     
     
         6 . The polymeric latex of  claim 5  wherein the aqueous emulsion for preparing the seed polymer further comprises butadiene.  
     
     
         7 . The polymeric latex of  claim 1  wherein the aqueous emulsion for preparing the seed polymer further comprises di(meth)acrylate with ethylene oxide spacer units.  
     
     
         8 . The polymeric latex of  claim 7  wherein the aqueous emulsion for preparing the seed polymer further comprises butadiene.  
     
     
         9 . A polymeric latex prepared by aqueous emulsion polymerization of a monomeric mixture of styrene, butadiene, and optionally 1 to 10 phm of a nonionic monomer in the presence of a seed polymer prepared by the aqueous emulsion polymerization of 5 to 20 phm of styrene and 4 to 20 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         10 . The polymeric latex according to  claim 9  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 5 to 10 phm.  
     
     
         11 . The polymeric latex according to  claim 10  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of (meth)acrylonitrile, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         12 . The polymeric latex according to  claim 10  where the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of a C4-C9 (meth)acrylamide, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         13 . The polymeric latex of  claim 12  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         14 . The polymeric latex according to  claim 12  in which the C4-C9 
 (meth)acrylamide is selected from one or more of the following: methacrylamide, N-Isopropylacrylamide, N-tertButylacrylamide, and N-(1, 1-dimethyl-3-oxobutyl)acrylamide.  
 
     
     
         15 . The polymeric latex according to  claim 9  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 5 phm of a di(meth)acrylate with 5-20 ethylene oxide spacer units, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         16 . The polymeric latex according to  claim 15  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         17 . A polymeric latex prepared by aqueous emulsion polymerization of a monomeric mixture of 15 to 80 phm styrene, 10 to 70 phm butadiene, and optionally 1 to 10 phm of a nonionic monomer in the presence of a seed polymer prepared by the aqueous emulsion polymerization of 5 to 15 phm of styrene and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid  
     
     
         18 . The polymeric latex according to  claim 17  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of (meth)acrylonitrile, and 3 to 5 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         19 . The polymeric latex according to  claim 17  where the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of a C4-C9 (meth)acryl amide , and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         20 . The poly meric latex of  claim 19  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         21 . The polymeric latex according to  claim 19  in which the C4-C9 (meth)acrylamide is selected from one or more of the following: 
 methacrylamide, N-Isopropylacrylamide, N-tertButylacrylamide, and N-(1,1-dimethyl-3-oxobutyl)acrylamide.  
 
     
     
         22 . The polymeric latex according to  claim 17  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 0.15 phm of styrene, 2 to 5 phm of a di(meth)acrylate with 5-20 ethylene oxide spacer units, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         23 . The polymeric latex according to  claim 22  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         24 . A polymeric latex prepared by aqueous emulsion polymerization of a. monomeric mixture of 25 to 65 phm styrene, 20 to 50 phm butadiene, and 1 to 8 phm of a hydroxy(meth)acrylate in the presence of a seed polymer prepared by the aqueous emulsion polymerization of 5 to 15 phm of styrene and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         25 . The polymeric latex according to  claim 24  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of (meth)acrylonitrile, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         26 . The polymeric latex according to  claim 24  where the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of a C4-C9 (meth)acryl amide , and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         27 . The polymeric latex of  claim 26  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         28 . The polymeric latex according to  claim 24  in which the C4-C9 (meth)acrylamide is selected from one or more of the following: 
 methacrylamide, N-Isopropylacrylamide, N-tertButylacrylamide, and N-(1, 1-dimethyl-3-oxobutyl)acrylamide.  
 
     
     
         29 . The polymeric latex according to  claim 24  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 5 phm of a di(meth)acrylate with 5-20 ethylene oxide spacer units, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         30 . The polymeric latex according to  claim 29  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         31 . A polymeric latex prepared by aqueous emulsion polymerization of a monomeric mixture of styrene, butadiene, and optionally 1 to 10 phm of a nonionic comonomer in the presence of a seed polymer prepared by the aqueous emulsion polymerization of 5 to 15 phm of styrene, 2 to 10 phm of (meth)acrylonitrile, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid  
     
     
         32 . The polymeric latex according to  claim 31  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of (meth)acrylonitrile, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         33 . The polymeric latex according to  claim 31  where the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of a C4-C9 (meth)acrylamide, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         34 . The polymeric latex of  claim 33  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         35 . The polymeric latex according to  claim 31  in which the C1-C9 (meth)acrylamide is selected from one or more of the following: 
 methacrylamide, N-Isopropylacrylamide, N-tertButylacrylamide, and N-(1, 1-dimethyl-3-oxobutyl)acrylamide.  
 
     
     
         36 . The polymeric latex according to  claim 31  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 5 phm of a di(meth)acrylate with 5-20 ethylene oxide spacer units, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         37 . The polymeric latex according to  claim 36  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         38 . A polymeric latex prepared by aqueous emulsion polymerization of a monomeric mixture of styrene, butadiene, and optionally 1 to 10 phm of a nonionic monomer in the presence of a seed polymer prepared by the aqueous emulsion polymerization of 5 to 15 phm of styrene, 2 to 10 phm of a C4 through C9 (meth)acrylamide, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         39 . The polymeric latex according to  claim 38  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of (meth)acrylonitrile, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         40 . The polymeric latex according to  claim 38  where the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of a C4-C9 (meth)acrylamide, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         41 . The polymeric latex of  claim 40  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         42 . The polymeric latex according to  claim 40  in which the C4-C9 (meth)acrylamide is selected from one or more of the following: p 0  methacrylamide, N-Isopropylacrylamide, N-tertButylacrylamide, and N-(1, 1-dimethyl-3-oxobutyl)acrylamide.  
     
     
         43 . The polymeric latex according to  claim 38  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 5 phm of a di(meth)acrylate with 5-20 ethylene oxide spacer units, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         44 . The polymeric latex according to  claim 43  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         45 . A polymeric latex prepared by aqueous emulsion polymerization of a monomeric mixture of 15 to 80 phm styrene, 10 to 70 phm butadiene, 0 to 10 phm nonionic monomers and optionally 0.5 to 5 phm of a sulfonate monomer in the presence of a seed polymer prepared by the aqueous emulsion polymerization of 5 to 15 phm of styrene and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         46 . The polymeric latex according to  claim 45  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of (meth)acrylonitrile, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         47 . The polymeric latex according to  claim 45  where the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of a C4-C9 (meth)acrylamide, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         48 . The polymeric latex of  claim 47  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         49 . The polymeric latex according to  claim 47  in which the C4-C9 (meth)acrylamide is selected from one or more of the following: 
 methacrylamide, N-Isopropylacrylamide, N-tertButylacrylamide, and N-(1, 1-dimethyl-3-oxobutyl)acrylamide.  
 
     
     
         50 . The polymeric latex according to  claim 45  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 5 phm of a di(meth)acrylate with 5 to 20 ethylene oxide spacer units, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         51 . The polymeric latex according to  claim 50  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         52 . A polymeric latex according to  claim 45  in which the sulfonate monomer that is polymerized after the seed step is selected from one or more of the following: salts of 2-acrylamido-2-methylpropanesulfonic acid, salts of styrenesulfonic acid, salts of (meth)allylsulfonic acid, salts of 2-sulfoethyl(meth)acrylate and salts of 3-sulfopropyl(meth)acrylate.  
     
     
         53 . The polymeric latex according to  claim 52  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of (meth)acrylonitrile, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         54 . The polymeric latex according to  claim 53  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         55 . The polymeric latex according to  claim 52  where the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 10 phm of a C4-C9 (meth)acrylamide, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         56 . The polymeric latex of  claim 55  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         56 . The polymeric latex according to  claim 54  in which the C4-C9 (meth)acrylamide is selected from one or more of the following: 
 methacrylamide, N-Isopropylacrylamide, N-tertButylacrylamide, and N-(1, 1-dimethyl-3-oxobutyl)acrylamide.  
 
     
     
         57 . The polymeric latex according to  claim 52  wherein the seed polymer is prepared with 1 to 8 phm of 1,3-butadiene in addition to 5 to 15 phm of styrene, 2 to 5 phm of a di(meth)acrylate with 5-20 ethylene oxide spacer units, and 3 to 10 phm of a salt of 2-acrylamido-2-methylpropanesulfonic acid.  
     
     
         58 . The polymeric latex according to  claim 57  wherein the salt of 2-acrylamido-2-methylpropanesulfonic acid is 3 to 5 phm.  
     
     
         60 . A semi-batch aqueous emulsion polymerization process for preparing a polymeric latex having high multivalent ion stability comprising the steps of: 
 preparing a polymer seed by aqueous emulsion polymerization of styrene and a salt of 2-acrylamido-2-methylpropanesulfonic acid; and    polymerizing a monomeric mixture of styrene, butadiene, and optionally a nonionic monomer in the presence of the polymer seed, whereby the monomeric mixture is added in stages.    
     
     
         61 . The process of  claim 60  wherein the monomeric mixture is added in about 3-16 stages.  
     
     
         62 . The process of  claim 60  wherein the monomeric mixture is added continuously.  
     
     
         63 . The process of  claim 60  wherein the pH during the preparation of the seed polymer is above 4.5.  
     
     
         64 . The process of  claim 60  wherein the pH during the preparation of the seed polymer is between 6-9.  
     
     
         65 . The process of  claim 60  wherein the seed polymer is prepared with 0.8 to 1.6 phm of the salt of the dihexylester of sulfosuccinic acid as the primary emulsifier.  
     
     
         66 . The process of  claim 65  wherein the seed polymer is prepared with 0.8 to 1.6 phm of the salt of the dihexylester of sulfosuccinic acid as the sole emulsifier.  
     
     
         67 . A cement composition comprising portland cement, mineral aggregate and an additive including a latex of  claim 1 .  
     
     
         68 . A cement composition comprising portland cement, mineral aggregate and an additive including a latex of  claim 9 .  
     
     
         69 . A cement composition comprising portland cement, mineral aggregate and an additive including a latex of  claim 17 .  
     
     
         70 . A cement composition comprising portland cement, mineral aggregate and an additive including a latex of  claim 24 .  
     
     
         71 . A cement composition comprising portland cement, mineral aggregate and an additive including a latex of  claim 31 .  
     
     
         72 . A cement composition comprising portland cement, mineral aggregate and an additive including a latex of  claim 38 .  
     
     
         73 . A cement composition comprising portland cement, mineral aggregate and an additive including a latex of  claim 45 .  
     
     
         74 . A method of cementing a wellbore, comprising the steps of: 
 mixing together a cementing composition, water in an amount to produce a pumpable slurry, and an additive including a latex prepared by aqueous emulsion polymerization of a monomeric mixture comprising styrene, butadiene and 2-acrylamido-2-methylpropanesulfonic acid and their salts;    pumping said pumpable slurry to the desired location in said wellbore; and allowing said pumpable slurry to harden to a solid mass.