Process for preparing an aqueous polymer latex

US11155663B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Tanja ROST · Mannheim, DE
• Roelof Balk · Böhl-Iggelheim, DE
• Immanuel WILLERICH · Schifferstadt, DE
• Sebastian Enck · Jakarta, ID
• Joost LESWIN · Mannheim, DE
• Wolfgang Gaschler · Shanghai, CN
• Martin Robert SCHEUBLE · Havelsee, DE

Key dates

• Filing date: May 3, 2017
• Grant date: Oct 26, 2021
• Expiry date: Jul 29, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K2003/2241
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed herein is a process for preparing an aqueous polymer latex by polymerising a monomer composition M by a radical emulsion polymerisation, where at least 95% of the monomer composition M is metered during a period P to the polymerisation reaction under polymerisation conditions, such that during at least one period P(n) within the period P, the relative amount of monomers M2, which are metered to the polymerisation reaction during the periods P(n), to the total amount of the monomer composition M, which is metered to the polymerisation reaction during said period P(n), is at least 1% by weight higher than the relative amount of monomers M2, which are metered to the polymerisation reaction outside of each of said periods P(n), to the total amount of the monomer composition M, which is metered to the polymerisation reaction outside of each of said periods P(n).