US 12,220,479 B2
Suncare formulation
Fanwen Zeng, Audubon, PA (US); Xiaodong Lu, North Wales, PA (US); Tian Lan, Langhorne, PA (US); Isabelle Van Reeth, Incourt Walloon Brabant (BE); Helene Dihang, Taisnières-sur-Hon (FR); Marc Eeman, Sombreffe (BE); and Inna Shulman, Langhorne, PA (US)
Assigned to ROHM AND HAAS COMPANY, Collegeville, PA (US); DOW GLOBAL TECHNOLOGIES LLC, Midland, MI (US); and DOW SILICONES CORPORATION, Midland, MI (US)
Appl. No. 17/269,573
Filed by Dow Global Technologies LLC, Midland, MI (US); Rohm and Haas Company, Collegeville, PA (US); and Dow Silicones Corporation, Midland, MI (US)
PCT Filed Oct. 1, 2019, PCT No. PCT/US2019/053945
§ 371(c)(1), (2) Date Feb. 19, 2021,
PCT Pub. No. WO2020/076549, PCT Pub. Date Apr. 16, 2020.
Claims priority of provisional application 62/744,248, filed on Oct. 11, 2018.
Prior Publication US 2021/0308036 A1, Oct. 7, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61K 8/91 (2006.01); A61K 8/34 (2006.01); A61K 8/35 (2006.01); A61K 8/37 (2006.01); A61K 8/40 (2006.01); A61K 8/81 (2006.01); A61K 8/893 (2006.01); A61Q 17/04 (2006.01)
CPC A61K 8/91 (2013.01) [A61K 8/345 (2013.01); A61K 8/35 (2013.01); A61K 8/37 (2013.01); A61K 8/40 (2013.01); A61K 8/8147 (2013.01); A61K 8/893 (2013.01); A61Q 17/04 (2013.01); A61K 2800/544 (2013.01); A61K 2800/5922 (2013.01)] 14 Claims
 
1. A polymer blend, comprising:
(a) 25 to 95 wt %, based on weight solids of the polymer blend, of a single stage polymer,
wherein the single stage polymer comprises:
90 to 99.8 wt % of structural units of a monoethylenically unsaturated non-ionic monomer, wherein the monoethylenically unsaturated non-ionic monomer is selected from the group consisting of a mixture of (i) 58 to 61 wt % of a C1-4 alkyl (meth)acrylate, wherein the C1-4 alkyl (meth)acrylate is a mixture of 33 to 35 wt % of methyl (meth)acrylate and 65 to 67 wt % of n-butyl (meth)acrylate; and (ii) 39 to 42 wt % of a C8-22 alkyl (meth)acrylate, wherein the C8-22 alkyl (meth)acrylate is 2-ethylhexyl acrylate;
0.19 to 10 wt % of structural units of a monoethylenically unsaturated carboxylic acid monomer, wherein the monoethyleneically unsaturated carboxylic acid monomer is methacrylic acid; and
0.01 to 2 wt % of structural units of a multiethylenically unsaturated monomer having at least two ethylenically unsaturated groups per molecule, wherein the multiethylenically unsaturated monomer having at least two ethylenically unsaturated groups per molecule is allyl methacrylate (ALMA); and
(b) 5 to 75 wt %, based on weight solids of the polymer blend, of a silicone-grafted vinyl copolymer, wherein the silicone-grafted vinyl copolymer, comprises:
25 to 95 wt %, based on weight of the silicone-grafted vinyl copolymer, of structural units of a vinyl monomer, wherein the vinyl monomer is selected from the group consisting of methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl acrylate, isobutyl acrylate, tert-butyl acrylate, n-hexyl acrylate, cyclohexyl acrylate, 2-ethylhexyl acrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl methacrylate, n-hexyl methacrylate, 2-ethylhexyl methacrylate, styrene and mixtures thereof; and
5 to 75 wt %, based on weight of the silicone-grafted vinyl copolymer, of structural units of a carbosiloxane dendrimer of formula (I)

OG Complex Work Unit Chemistry
wherein each R1 is a methyl group; wherein each X is a silylalkyl group of formula (II)

OG Complex Work Unit Chemistry
wherein R2 is a C2 alkylene group; wherein each R3 is independently a C1-10 alkyl group; wherein each Z is independently selected from the group consisting of a hydrogen, a C1-10 alkyl group, an aryl group and a silylalkyl group of formula (II);
wherein a is 0; wherein Y is of formula (III)

OG Complex Work Unit Chemistry
wherein each R4 is a methyl group; wherein R5 is a C3 alkylene group.