Title of Invention

"OPACIFYING PARTICLES AND COMPOSITIONS FORMED THEREFROM"

Abstract An opacifying particle including a pigment particle having an average particle diameter of from 0.15 micron to 1.0 micron and a refractive index of at least 1.8, the pigment particle being at least partially encapsulated in a polymeric shell having a calculated thickness of from 35 nm to 200 nm, wherein the polymeric shell includes at least a first polymer phase and a second polymer phase, wherein the first polymer is substantially in contact with the surface of the pigment particle providing a calculated shell thickness of at least 25 mm. and wherein the first polymer has a refractive index of at least 0.03 units less than the refractive index of the second polymer is provided as is a composition such as, for example, a coating or a plastic including the opacifying particle. Further provided is a composition including pigment particles having an average particle diameter of from 0.15 micron to 1.0 micron and a refractive index of at least 1.8, the pigment particles being at least partially encapsulated in a shell of a first polymer having a calculated thickness of from 25 nm to 200 nm, and the encapsulated pigment particles in contact with from 10% to 600% by weight, based on the weight of the first polymer, second polymer, wherein the first polymer has a refractive index of at least 0.03 units less than the refractive index of the second polymer.
Full Text

Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=L2Tnz6e5G4b9QAZl+CvIAQ==&loc=+mN2fYxnTC4l0fUd8W4CAA==


Patent Number 269567
Indian Patent Application Number 985/DEL/2011
PG Journal Number 44/2015
Publication Date 30-Oct-2015
Grant Date 28-Oct-2015
Date of Filing 06-Apr-2011
Name of Patentee ROHM AND HAAS COMPANY
Applicant Address 100 INDEPENDENCE MALL WEST, PHILADELPHIA, PENNSYLVANIA, 19106, U.S.A.
Inventors:
# Inventor's Name Inventor's Address
1 WARD THOMAS BROWN 1203 BARBARA'S COURT, NORTH WALES, PENNSYLVANIA 19454, U.S.A.
PCT International Classification Number C09C
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 61/342,019 2010-04-08 U.S.A.