Liquid non-aqueous dispersion and process for producing the same
A liquid non-aqueous dispersion including a silicone oil and a copolymer dispersed therein, the copolymer including (A) at least one radical polymerizable macromonomer containing dimethyl polysiloxane, and (B) at least one radical copolymerizable monomer with the macromonomer (A), which includes at least one (meth)acrylate monomer and optionally at least one vinyl monomer. This liquid non-aqueous dispersion has excellent water resistance, oil resistance and adhesive properties, and when used as a component of cosmetics, it can meet both requirements for long lasting make-up and good feeling of use of cosmetics.
1. A process for producing a liquid non-aqueous dispersion having a copolymer dispersed in a silicone oil, which comprises copolymerizing (A) 1 to 20% by weight of at least one radical polymerizable macromonomer containing dimethyl polysiloxane, the macromonomer (A) being represented by the formula (1):
(wherein X represents a radical polymerizable group, n is an integer of 1 to 10, and m is an integer of 3 to 300), and (B) 99 to 80% by weight of at least one radical copolymerizable monomer with said macromonomer (A), the monomer (B) comprising at least one (meth)acrylate monomer and optionally at least one vinyl monomer, by subjecting said monomers to one-step polymerization in a silicone oil in the presence of a radical polymerization initiator without a dispersion stabilizer.
2. The process according to claim 1 , wherein the amount of the radical polymerization initiator is 0.01 to 5% by weight based on the whole amount of the monomers.