Compositions with pH responsive copolymer containing MAEP and/or MAHP and method for using same

A HASE pH responsive copolymer of unsaturated copolymerizable monomers which is a water soluble thickener, said unsaturated copolymerizable monomers consisting of, based on total weight of monomers:

• A. about 10-70 weight percent first acidic monomer selected from at least one member of the group consisting of mono-[2-(methacryloyloxy)ethyl]phthalate having the structure A.I:
• and mono-[2-(Methacryloyloxy)ethyl hexahydro]phthalate having the structure A.II
• B. about 0-45 weight percent of at least one C3-C8 alpha beta-ethylenically unsaturated second acidic monomer, wherein the second acidic monomer is selected from a group consisting of methacrylic acid, acrylic acid and a combination thereof;
• C. about 15-70 weight percent of at least one nonionic, copolymerizable unsaturated monomer, wherein the nonionic, copolymerizable unsaturated monomer is an alkyl acrylate according to structure (C.III):
• R43—R42—R41 (C.III)
• wherein:
• R41 is C1-C22 alkyl, and
• R42 is absent or is a bivalent linking group, and
• R43 is a moiety having a site of ethylenic unsaturation according to structure (C.IV):
• wherein R19 is H or (C1-C4)alkyl;
• and
• D. about 0.05 to 30 weight percent of at least one nonionic ethylenically unsaturated hydrophobic monomer, wherein the hydrophobic monomer comprises one or more compounds according to structure (D.XXV):
• wherein
• R21 is C5-C50 alkyl, hydroxyalkyl, alkoxyalkyl, aryl, or arylalkyl,
• R25 is methyl or ethyl, and
• p is 2, q is 2 to 5,
• r is an integer of from 1 to about 80,
• s is 0,
• t is 1.

An ASE pH responsive copolymer of unsaturated copolymerizable monomers which is a water soluble thickener, said unsaturated copolymerizable monomers consisting of, based on total weight of monomers:

• A. about 10-70 weight percent first acidic monomer selected from at least one member of the group consisting of mono-[2-(methacryloyloxy)ethyl]phthalate having the structure A.I:
• and mono-[2-(Methacryloyloxy)ethyl hexahydro]phthalate having the structure A.II
• B. about 0-45 weight percent of at least one C3-C8 alpha beta-ethylenically unsaturated second acidic monomer, wherein the second acidic monomer is selected from a group consisting of methacrylic acid, acrylic acid and a combination thereof;
• C. about 15-70 weight percent of at least one nonionic, copolymerizable unsaturated monomer, wherein the nonionic, copolymerizable unsaturated monomer is an alkyl acrylate according to structure (C.III):
• R43—R42—R41 (C.III)
• wherein:
• R41 is C1-C22 alkyl, and
• R42 is absent or is a bivalent linking group, and
• R43 is a moiety having a site of ethylenic unsaturation according to structure (C.IV):
• wherein R19 is H or (C1-C4)alkyl.