Surface properties of radiation-cured coatings

US12338363B2 · kind B2 · utility

Assignee

• BYK-CHEMIE GMBH · DE

Inventors

• Marc Eberhardt · Wesel, DE
• Guillaume Wojciech Jaunky · Wesel, DE

Key dates

• Filing date: Aug 30, 2021
• Grant date: Jun 24, 2025
• Expiry date: Mar 24, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D4/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a method of improving the surface properties of a radiation cured coating, comprising adding to a radiation-curable coating composition 0.1 to 10.0% by weight, based on the total weight of the radiation-curable coating composition, of a polymer (A) having a polysiloxane backbone and at least two methacryloyl groups connected to the polysiloxane backbone via linking groups, wherein the linking groups comprise at least one non-cyclic ether group, and wherein the polysiloxane backbone is connected to the linking groups via a Si—C bond, and wherein polymer (A) is prepared by a process comprising i) Providing a polysiloxane backbone having at least two Si—H groups, ii) Providing a molecule having at least one methacryloyl group, one allyl group, and at least one non-cyclic ether group located between the allyl group and the at least one methacryloyl group, and iii) Forming a covalent bond between the polysiloxane backbone i) and the molecule ii) by reacting the Si—H groups with the allyl group via a hydrosilylation reaction.