Patent · US Active

Controlled release granule with water resistant coating

US10017685B2 · kind B2 · utility

0Cited by

6References

13Claims

0Family size

Assignee

Akzo Nobel Chemicals International B.V · NL

Inventors

Paul Michael Ferm · Morristown, US
Andrew Alexander Robertson · Aberdeen, US
Kurt Randall Heidemann · Easton, US
Jian Zhou · Chongqing, CN
Daniel Bode · Cleveland, US
Jude Thomas Rademacher · Akron, US
Patricia B. Siuta-Cruce · Scottsdale, US

Key dates

Filing date	Jul 17, 2015
Grant date	Jul 10, 2018
Priority date	—
Expiry date	Jul 17, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2208/26
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A controlled release composition containing a water-active material in the form of granules having a protective barrier coating capable of releasing the water-active material under predetermined release conditions, wherein the protective barrier coating comprises a polymer blend of two latex polymers, a method of preparing such a composition, a sprayable solution useful in the preparation of the composition, and the use of the composition for breaking a fracturing fluid.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.