| 主权项 |
1. A water-in-oil emulsion comprising:
(A) an oil phase comprising:
(a) about 80 to about 99%, by weight, of a monomer component comprising:
(i) about 60% to about 98%, by weight, of a first substantially water-insoluble monomer selected from the group consisting of a C2-C18 alkyl acrylate, an aryl acrylate, a C2-C18 alkyl methacrylate, an aryl methacrylate, and mixtures thereof;(ii) about 2% to about 40%, by weight, of a substantially water-insoluble polyfunctional crosslinker selected from the group consisting of an acrylate polyester, a methacrylate polyester, an acrylate methacrylate polyester, and a mixture thereof;(iii) 0% to about 15%, by weight, of a second substantially water-insoluble monomer;wherein at least one of the first substantially water-insoluble monomer (i), polyfunctional crosslinker (ii), or second substantially water-insoluble monomer (iii) exhibit a 14C/C ratio of about 1.0×10−13 or greater; and,(b) about 1% to about 20%, by weight, of an emulsifier component which is miscible in the oil phase and suitable for forming a stable water-in-oil emulsion; and (B) a water phase comprising about 0.2% to about 40%, by weight, of a water-soluble electrolyte; wherein the emulsion has a volume to weight ratio of water phase to oil phase in the range of about 8:1 to about 140:1. |
