UREIDO-FUNCTIONALIZED AQUEOUS POLYMERIC DISPERSION

摘要

The present invention relates to a stable aqueous dispersion of acrylic based polymer particles with a first and a second polymeric domain, wherein the first polymeric domain is film-forming at room temperature and the second polymeric domain has a Tg of not less than 35° C., and wherein both polymeric domains include structural units of a ureido monomer. The composition of the present invention addresses a need in the art by providing a composition that is useful as a binder with improved alkyd adhesion properties.

主权项

1. A stable aqueous dispersion of polymer particles comprising:
1) from 85 to 98 weight percent of a first polymeric domain comprising, based on the weight of first polymeric domain:
a) from 0.2 to 5 weight percent structural units of a ureido monomer;b) from 0.1 to 3 weight percent structural units of a carboxylic acid monomer; andc) from 30 to 99.4 weight percent structural units of methyl methacrylate and at least one acrylate selected from the group consisting of ethyl acrylate, butyl acrylate, ethylhexyl acrylate, and propylheptyl acrylate; and 2) from 2 to 15 weight percent of a second polymeric domain comprising, based on the weight of second polymeric domain:
a) from 2 to 20 weight percent structural units of a ureido monomer; andb) from 40 to 98 weight percent structural units of methyl methacrylate and at least one acrylate selected from the group consisting of ethyl acrylate, butyl acrylate, ethylhexyl acrylate and propylheptyl acrylate;wherein the first polymeric domain is film forming at room temperature and the second polymeric domain has a Tg of not less than 35° C.