Aqueous polymer emulsions and cosmetics with the use of the same

A water-based polymer emulsion obtained by emulsion polymerization of one or more silane coupling monomer selected from the group consisting of the monomers (A) represented by Formula (1), one or more lipophilic radical polymerizable monomer selected from the monomers (B) represented by Formula (2), and one or more hydrophilic radical polymerizable monomer selected from the monomers (C) represented by Formula (3), in which the polymer having the monomer (A)-derived reactive silyl group remaining therein is dispersed at a concentration or lower allowing the crosslinking between said silyl groups to be formed in a water-based dispersion medium.

• 7
• (wherein R1 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, R2 is a group selected from
• 8
• R3 is an alkylene group having 1 to 6 carbon atoms, each of R4 and R5 is a hydrogen atom or an alkyl group having Ito 6 carbon atoms, each of m and n is 0 or 1 and k is an integer of 1 to 3.)
• 9
• (wherein R6 is a hydrogen atom or a methyl group, R7 is an alkyl group having 1 to 18 carbon atoms, an alkyl group having a fluorine atom and 1 to 18 carbon atoms or an alkyl group having
• 10
• and 1 to 18 carbon atoms, in which each of R8 and R9 is a hydrogen atom or a methyl group, and J is an integer of 1 to 18.)
• 11
• (wherein R10 is a hydrogen atom or a methyl group, R11 is an alkyl group having a carboxyl group, ester group, ether group, amide group, urethane group and hydroxyl group and 1 to 6 carbon atoms.)