Composite polymer composition

Patent metadata

Field	Value
Publication number	US-9598569-B2
Application number	US-201414902579-A
Country	US
Kind code	B2
Filing date	Jun 30, 2014
Priority date	Jul 1, 2013
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A composite polymer composition comprising the emulsion polymerization product of: (i) an aqueous dispersion comprising the melt kneading product of one or more polyolefins, from 2 to 25 wt % of one or more dispersion stabilizing agents, water and optionally a neutralizing agent, and (ii) one or more (meth)acrylic monomers; wherein the one or more polyolefins have a Tg equal to or less than 50° C. and comprise from 0.5 to 100 wt % functionalized polyolefin; and wherein the melt kneading product (i) comprises polymer particles having a volume average particle size between 150 nm and 2000 nm dispersed in the water; and wherein the one or more (meth)acrylic monomers polymerize onto the polymer particles form composite polymer particles using an emulsion polymerization process is provided.

First claim

I claim:

1. A composite polymer composition comprising:
an emulsion polymerization product of:
(i) an aqueous dispersion comprising a melt kneading product of one or more polyolefins, from 2 to 25 wt % of one or more dispersion stabilizing agents, water and optionally a neutralizing agent, and
(ii) one or more (meth)acrylic monomers;
wherein the one or more polyolefins have a Tg equal to or less than 50° C. and comprise from 0.5 to 100 wt % functionalized polyolefin, wherein said functionalized polyolefin is a maleic anhydride grafted polyolefin, and wherein functionalization of the functionalized polyolefin component occurs prior to formation of the aqueous dispersion; and
wherein the melt kneading product of one or more polyolefins comprises polymer particles having a volume average particle size between 150 nm and 2000 nm; and
wherein the one or more (meth)acrylic monomers are polymerized onto the polymer particles to form composite polymer particles.

2. The composite polymer composition according to claim 1 , wherein the one or more polyolefins are crosslinked with peroxides during formation of the aqueous dispersion.

3. The composite polymer composition according to claim 1 , wherein the one or more polyolefins are crosslinked with peroxides following formation of the aqueous dispersion.

4. The composite polymer composition according to claim 1 , wherein the ratio by weight of the one or more polyolefins to the one or more (meth)acrylic monomers is between 60:40 and 95:5.

5. The composite polymer composition according to claim 1 , wherein the functionalized polyolefin is prepared by one or more processes selected from the group consisting of thermal grafting, photo initiation and redox radical generation.

Assignees

• Rohm & Haas

Inventors

• Nelliappan Veera

Classifications

• C08L23/26 Primary

  modified by chemical after-treatment (saponified copolymers C08L23/0861; unsaturated acid salts C08L23/0876) · CPC title

• C08F255/02

  on to polymers of olefins having two or three carbon atoms · CPC title

• C08L69/00

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title