UV protective compositions, processes for preparing such compositions, methods of coating substrates therewith and multi-layer articles formed thereby

US8722778B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Gunther Stollwerck · Krefeld, DE
• Robert Maleika · Düsseldorf, DE
• Frank Buckel · Krefeld, DE
• Peter Capellen · Krefeld, DE

Key dates

• Filing date: Oct 20, 2008
• Grant date: May 13, 2014
• Expiry date: Aug 12, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/34926
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Compositions, suitable for coating surfaces, methods for their preparation and for coating surfaces therewith, where said compositions comprise: (a) 100,000 parts by weight of a primer composition comprising a binder material (a1), a primer solvent (a2) and a UV absorber (a3), wherein the primer composition is suitable as an adhesion-promoting agent between a thermoplastic substrate and a siloxane-based top coat; (b) 0 to 900,000 parts by weight of a solvent, and (c) 1 to 3000 parts by weight of a compound according to the general formula (I):wherein X represents a moiety selected from the group consisting —OR6, —OCH2CH2OR6, —OCH2CH(OH)CH2OR6 and —OCH(R7)COOR8, wherein R6 represents a branched or unbranched C1-C13 alkyl, C2-C20 alkenyl, C6-C12 aryl or —CO—C1-C18 alkyl, R7 represents H or a branched or unbranched C1-C8 alkyl, and R8 represents a C1-C12 alkyl, a C2-C12 alkenyl or a C5-C6 cycloalkyl, and wherein the composition has a viscosity of 40 s to 140 s measured in accordance with DIN EN ISO 2431 at 23° C. and with a 2 mm cup.