US 10,519,281 B2 · Aqueous dispersion of fluoroalkylated polymer particles with acorn morphology

Abstract

The present invention provides a composition comprising 1) an aqueous dispersion of polymer particles having a core-shell morphology wherein the core protuberates from the shell; wherein the core comprises from 5 to 90 weight percent structural units of a fluoroalkylated monomer, and 2) less than 0.09 weight percent structural units of a phosphorus acid monomer; and wherein the shell comprises from 0.1 to 5 weight percent of itaconic acid or a phosphorus acid monomer, based on the weight of the shell. The present invention addresses a need in the art by providing a way of selectively concentrating fluoroalkyl functionality into polymer particles with acorn morphology, thereby providing an improvement in dirt pick-up resistance of the subsequent coating.

Claims9

Dependent claims

A composition comprising an aqueous dispersion of polymer particles having a particle size as measured by dynamic light scattering in the range of from 40 nm to 300 nm, wherein the polymer particles have a core-shell morphology wherein the core protuberates from the shell;

wherein the core comprises from 5 to 90 weight percent structural units of a fluoroalkylated monomer, and less than 0.09 weight percent structural units of a phosphorus acid monomer, based on the weight of the core;
and wherein the shell comprises from 0.1 to 5 weight percent of itaconic acid or a phosphorus acid monomer, based on the weight of the shell;
wherein the weight-to-weight ratio of the shell to the core is in the range of from 3:1 to 50:1.

Dependencies are inferred from the claim text.

Facts

Application

15/830,676Filed 4 Dec 2017 · us provisional application

Priority

9 Dec 2016

Published

US 2018/0346660 A16 Dec 2018

Granted

31 Dec 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification32 codes

C08F 220/1804
With acrylic or methacrylic acids: c4-acrylate, e.g. butyl acrylate, isobutyl acrylate or tert-butyl acrylate
C08F 2/22
Aqueous medium: emulsion polymerisation
C08F 30/02
Homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond,…
C08F 130/02
Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing…:…

Aqueous dispersion of fluoroalkylated polymer particles with acorn morphology

Life of this patent

Aqueous dispersion of fluoroalkylated polymer particles with acorn morphology

Life of this patent

Abstract

Claims9