Patent · US Active

Acrylic acid polymers neutralized with sodium and calcium ions and having a narrow molecular weight distribution

US10968295B2 · kind B2 · utility

0Cited by

5References

9Claims

0Family size

Assignee

BASF SE

Inventors

Ferdinand Leifeld · Kempen, DE
Achim Fessenbecker · Ludwigshafen, DE
Steffen Henkes · Ludwigshafen, DE
Massimiliano Bordignon · Ludwigshafen, DE
Vandana Kurkal-Siebert · Heidelberg, DE
Laszlo Szarvas · Ludwigshafen, DE
Qing Tong · Shanghai, CN

Key dates

Filing date	Oct 24, 2017
Grant date	Apr 6, 2021
Priority date	—
Expiry date	Oct 24, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K2003/265
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

An acrylic acid polymer having a weight average molecular weight Mw in the range from 3500 to 2000 g/mol and a polydispersity index Mw/Mn≤2.5, wherein 30% to 60% of the acid groups of the acrylic acid polymers have been neutralized with calcium ions, 30% to 70% of the acrylic acid polymers have been neutralized with sodium ions and 0% to 10% of the acid groups of the acrylic acid polymers have not been neutralized.

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