Multistage polymer

A multistage polymer, comprising:

• (a) 75 to 82 wt %, based on weight of the multistage polymer, of an acrylate rich stage comprising:
• 82.17 to 94.68 wt %, based on weight of the acrylate rich stage, of structural units of a monoethylenically unsaturated non-ionic, acrylate rich stage monomer, wherein the monoethylenically unsaturated non-ionic, acrylate rich stage monomer is selected from a mixture of at least two C1-4 alkyl (meth)acrylates;
• 4 to 16 wt %, based on weight of the acrylate rich stage, of structural units of a first carbosiloxane monomer of formula (I)
• 1.25 to 1.75 wt %, based on weight of the acrylate rich stage, of structural units of a monoethylenically unsaturated carboxylic acid, acrylate rich stage monomer;
• and
• 0.07 to 0.08 wt %, based on weight of the acrylate rich stage, of structural units of a multiethylenically unsaturated, acrylate rich stage monomer having at least two ethylenically unsaturated groups per molecule;
• and
• (b) 18 to 25 wt %, based on weight of the multistage polymer, of a carbosiloxane rich stage, comprising:
• 0 to 90 wt %, based on weight of the carbosiloxane rich stage, of structural units of a vinyl monomer;
• and
• 10 to 100 wt %, based on weight of the carbosiloxane rich stage, of structural units of a second carbosiloxane monomer of formula (I)
• wherein a is 1;
• wherein d is 0;
• wherein each R1 is a methyl group;
• wherein each R2 is independently selected from the group consisting of a hydrogen and a C1-10 alkyl group;
• wherein each R8 is a —O—Si(CH3)3 group;
• wherein Y is of formula (II)
• wherein each R4 is independently selected from the group consisting of a hydrogen and a methyl group;
• wherein each R3 is a C3 alkylene group;
• and
• wherein the first carbosiloxane monomer of formula (I) and the second carbosiloxane monomer of formula (I) are the same or different.