Patent ID: 6506834
Filing Date: 2003-01-14
Classification: C08F,C08L,C09J

Abstract:
A process for producing a highly water resistant tackifier resin which comprises the steps of:dispersing a tackifying component, an oil-soluble peroxide or oil-soluble azo initiator, an acrylic monomer and an emulsifier in an amount of 0 to 2% by weight based on the obtained tackifier resin in an aqueous medium in which self-dispersible seed particles having polar groups on their surfaces are dispersed, wherein the amount of the acrylic monomer is 140 to 200 parts by weight and the amount of the tackifying component is 40 to 160 parts by weight, both based on 100 parts by weight of the seed particles; and polymerizing the acrylic monomer while at least part of the tackifying component is incorporated in the acrylic (co)polymer on or around the seed particles so that the seed particles grow 1.2 to 30 times that of the seed particles in linear dimension, based on average particle size thereof.