公开(公告)号：US20150225604A1

公开(公告)日：2015-08-13

申请号：US14425438

申请日：2013-09-25

Applicant: DSM IP ASSETS B.V.

Inventor： Johannes Wilhelmus Maria Hendriks ,  Adriaan Hofland ,  Michel Poul Tichelaar ,  Bas Tuijtelaars ,  Amyke Veurink ,  Bauke De Vries

IPC: C09D175/06

CPC classification number: C09D175/06 ,  C08G18/0852 ,  C08G18/10 ,  C08G18/227 ,  C08G18/4288 ,  C08G18/664 ,  C08G18/755 ,  C09D175/14 ,  C08G18/42

Abstract: There is described a solvent assisted dispersion (SAD) process for preparing an aqueous polycondensate (such as a polyester e.g. uralkyd) dispersion substantially free of solvents, comprising the steps of (a) reacting in a non-protic solvent a mixture of (i) one or more polycondensate monomers, oligomers and/or polymers comprising a plurality of isocyanate-reactive groups; wherein the monomers, oligomers and/or polymers comprises at least 2% by weight (components) of a fully, partially or non-neutralized acid group having a pKa less than 3 (ii) at least one multifunctional isocyanate, to form a mixture of a first (e.g. uralkyd) emulsifier resin and the non-protic solvent; (b) optionally, reacting the first emulsifier resin from step (a) with at least one monomer, oligomer and/or polymer different from component (a) (performance polymer) to form a second (e.g. uralkyd) resin; (c) dispersing the first emulsifier resin from step (a) and/or the second performance resin from step (b) in an aqueous medium to form an aqueous (e.g. uralkyd) dispersion. (d) removing substantially all of the non-protic solvent from the dispersion to form a (e.g. uralkyd) dispersion substantially-free of solvent.

Abstract translation: 描述了一种溶剂辅助分散体（SAD）方法，用于制备基本上不含溶剂的水性缩聚物（例如聚酯，例如uralkyd）分散体，包括以下步骤：（a）在非质子溶剂中使（i） 包含多个异氰酸酯反应性基团的一种或多种缩聚单体，低聚物和/或聚合物; 其中所述单体，低聚物和/或聚合物包含至少2重量％（组分）的具有pKa小于3的完全，部分或未中和的酸基团（ii）至少一种多官能异氰酸酯，以形成 第一（例如uralkyd）乳化剂树脂和非质子溶剂; （b）任选地使来自步骤（a）的第一乳化剂树脂与至少一种不同于组分（a）（性能聚合物）的单体，低聚物和/或聚合物反应以形成第二（例如uralkyd）树脂; （c）将来自步骤（a）的第一乳化剂树脂和/或来自步骤（b）的第二性能树脂分散在水性介质中以形成水性（例如uralkyd）分散体。 （d）从分散体中基本上除去所有非质子溶剂，以形成基本上不含溶剂的（例如uralkyd）分散体。