公开(公告)号：US10883015B2

公开(公告)日：2021-01-05

申请号：US16542229

申请日：2019-08-15

Applicant: DSM IP Assets B.V.

Inventor： Roel Johannes Marinus Swaans ,  Ronald Tennebroek ,  Gerardus Cornelis Overbeek ,  Paul de Kok

IPC: C08F2/46 ,  C08F2/50 ,  C08G61/04 ,  B05D3/02 ,  C09D175/08 ,  C08G18/48 ,  C08J3/03 ,  C08G18/75 ,  C08G18/79 ,  C08G18/08 ,  C08G18/10 ,  C08G18/22 ,  C08L75/08 ,  C08G18/32

Abstract: Aqueous coating compositions include dispersed polyurethane-vinyl polymer hybrid particles obtained by free-radical polymerization of at least one vinyl monomer in the presence of a polyurethane. The polyurethane and the vinyl polymer in the hybrid particles are present in a weight ratio of polyurethane to vinyl polymer ranging from 1:1 to 20:1, and the polyurethane is the reaction product of at least the following components: (a) from 5 to 40 wt. % of at least one organic difunctional isocyanate, (b) from 0.5 to 4 wt. % of an isocyanate-reactive compound containing ionic or potentially ionic water-dispersing groups having a molecular weight of from 100 to 500 g/mol, (c) from 40 to 80 wt. % of at least one diol having a molecular weight from 500 to 5000, (d) from 0 to 10 wt. % of at least one active-hydrogen chain extending compound with a functionality of at least 2 other than water, (e) from 0 to 10 wt. % of at least one diol having a molecular weight below 500 g/mol. The isocyanate and hydroxy groups on the components used are present in a respective mole ratio (NCO to OH) in the range of from 0.8:1 to 5:1.