A crosslinked nonionic amphiphilic emulsion polymer prepared by polymerizing a monomer composition comprising: a) from about 20 to about 50 wt.% of hydroxyethyl methacrylate; b) from about 10 to about 30 wt.% ethyl acrylate; c) from about 10 to about 30 wt.% butyl acrylate; d) from about 1 to about 15 wt.% of at least one associative and/or semi-hydrophobic monomer wherein all monomer weight percentages are based on the weight of the total monounsaturated monomers; e) from about 0.01 to about 5 parts by wt.% in one aspect, from about 0.1 to about 3 wt.% in another aspect, and from about 0.5 to about 1 wt.% in a further aspect of at least one crosslinker based on 100 parts by wt. of the monounsaturated monomers utilized to prepare the polymer selected from an amphiphilic crosslinking agent wherein said amphiphilic crosslinking agent is a compound of formula: where: R 21 is a C 10-24 alkyl, alkaryl, alkenyl, or cycloalkyl; R 20 is CH 3, CH 2 CH 3, C 6 H 5, or C 14 H 29; R 22 is H or Z - M +; Z - is SO 3 -, or PO 3 2-; M + is Na +, K +, NH 4 +, or an alkanolamine; x is 2-10; y is 0-200; and z is 4-200, or wherein the amphiphilic crosslinking agent is a compound of formula: where: n is 1 or 2; z is 4 to 40 in one aspect, 5 to 38 in another aspect, and 10 to 20 in a further aspect; and R 22 is H, SO 3 - M + or PO 3 2- M +, and M is selected from Na +, K +, NH 4 + or an alkanolamine.; and f) from about 1 to about 15 parts by wt. based on 100 parts by wt. of the monounsaturated monomers utilized to prepare the polymer of an amphiphilic additive selected from the formula: wherein Q represents a polyol residue; A represents a poly(ethylene glycol) residue; R is selected from a saturated and unsaturated C 10 to C 22 acyl group and a poly(propylene glycol) residue; R 23 is independently selected from H, a saturated and unsaturated C 10 to C 22 acyl radical and a poly(propylene glycol) residue; a is 0 or 1; b is 0 or 1; and c is a number from 1 to 4; subject to the proviso that when b is 0, a and c are 1, and when b is 1, a is 0 and R 23 is not a poly(propylene glycol) residue. a) from about 20 to about 50 wt.% of hydroxyethyl methacrylate; b) from about 10 to about 30 wt.% ethyl acrylate; c) from about 10 to about 30 wt.% butyl acrylate; d) from about 1 to about 15 wt.% of at least one associative and/or semi-hydrophobic monomer wherein all monomer weight percentages are based on the weight of the total monounsaturated monomers; e) from about 0.01 to about 5 parts by wt.% in one aspect, from about 0.1 to about 3 wt.% in another aspect, and from about 0.5 to about 1 wt.% in a further aspect of at least one crosslinker based on 100 parts by wt. of the monounsaturated monomers utilized to prepare the polymer selected from an amphiphilic crosslinking agent wherein said amphiphilic crosslinking agent is a compound of formula: where: R 21 is a C 10-24 alkyl, alkaryl, alkenyl, or cycloalkyl; R 20 is CH 3, CH 2 CH 3, C 6 H 5, or C 14 H 29; R 22 is H or Z - M +; Z - is SO 3 -, or PO 3 2-; M + is Na +, K +, NH 4 +, or an alkanolamine; x is 2-10; y is 0-200; and z is 4-200, or wherein the amphiphilic crosslinking agent is a compound of formula: where: n is 1 or 2; z is 4 to 40 in one aspect, 5 to 38 in another aspect, and 10 to 20 in a further aspect; and R 22 is H, SO 3 - M + or PO 3 2- M +, and M is selected from Na +, K +, NH 4 + or an alkanolamine.; and R 21 is a C 10-24 alkyl, alkaryl, alkenyl, or cycloalkyl; R 20 is CH 3, CH 2 CH 3, C 6 H 5, or C 14 H 29; R 22 is H or Z - M +; Z - is SO 3 -, or PO 3 2-; M + is Na +, K +, NH 4 +, or an alkanolamine; x is 2-10; y is 0-200; and z is 4-200, n is 1 or 2; z is 4 to 40 in one aspect, 5 to 38 in another aspect, and 10 to 20 in a further aspect; and R 22 is H, SO 3 - M + or PO 3 2- M +, and M is selected from Na +, K +, NH 4 + or an alkanolamine.; and f) from about 1 to about 15 parts by wt. based on 100 parts by wt. of the monounsaturated monomers utilized to prepare the polymer of an amphiphilic additive selected from the formula: wherein Q represents a polyol residue; A represents a poly(ethylene glycol) residue; R is selected from a saturated and unsaturated C 10 to C 22 acyl group and a poly(propylene glycol) residue; R 23 is independently selected from H, a saturated and unsaturated C 10 to C 22 acyl radical and a poly(propylene glycol) residue; a is 0 or 1; b is 0 or 1; and c is a number from 1 to 4; subject to the proviso that when b is 0, a and c are 1, and when b is 1, a is 0 and R 23 is not a poly(propylene glycol) residue.