Patent ID: 6130288
Filing Date: 2000-10-10
Classification: C08F

Abstract:
A copolymer latex with a total solids content of at least 67% by weight, which has a viscosity of 2,000 centipoises or less, as measured with a BM viscometer under the conditions of total solids content of 67% by weight and at room temperature, wherein said copolymer latex is prepared by a process which comprises continuously or intermittently adding, into an aqueous solution of a polymerization initiator containing no emulsifier, a monomeric component composed of 0.1-10% by weight of an ethylenically unsaturated carboxylic acid monomer and 90-99.9% by weight of another monomer copolymerizable therewith, and 0.1-1.5 parts by weight of an emulsifier, per 100 parts by weight of the total monomeric component to be used for obtaining the copolymer latex, said monomeric component and said emulsifier being added into the aqueous solution simultaneously and further comprises supplementarily adding 0.1-1 part by weight of the emulsifier per 100 parts by weight of the total monomeric component, in addition to the aforesaid emulsifier, while the amount of the added monomers is within the range of 40-60% by weight of the total monomeric component.