Patent · US Active

Synthesis and use of gypsum seeding material

US9416021B2 · kind B2 · utility

0Cited by

11References

17Claims

0Family size

Assignee

BASF Construction Solutions GmbH · DE

Inventors

Niklas Loges · Pittenhart, DE
Uwe Gehrig · St. Georgen, DE
Michael Schinabeck · Garching bei München, DE
Frank Dierschke · Oppenheim, DE
Michael Bräu · Shanghai, CN
Luc Nicoleau · Fleury-les-Aubrais, FR

Key dates

Filing date	Jun 14, 2013
Grant date	Aug 16, 2016
Priority date	—
Expiry date	Jun 14, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2111/0062
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to a process for producing calcium sulphate dihydrate by reacting a water-soluble calcium compound with a water-soluble sulphate compound in the presence of water and a polymer containing acid groups, wherein the polymer containing acid groups comprises specific polyether groups. Additionally disclosed are calcium sulphate dihydrate producible by the process according to the invention, and the use thereof for production of gypsum plasterboard.

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