Patent · US Active

Treated inorganic pigments having improved bulk flow and their use in paper slurries

US8888956B2 · kind B2 · utility

2Cited by

17References

18Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Daniel C. Kraiter · Wilmington, US
Michael Diebold · Berlin, DE
Timothy Allan Bell · Wilmington, US

Key dates

Filing date	Apr 24, 2012
Grant date	Nov 18, 2014
Priority date	—
Expiry date	Apr 24, 2032

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H27/26
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The disclosure provides a paper slurry comprising a treated inorganic pigment, wherein the treated inorganic pigment comprises an inorganic pigment comprising a pigment surface area of about 30 to about 75 m2/g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5%, and wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11.

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