Nitrogen-free compounds as adhesion promoters for silicon-based scratch-resistant coatings on polycarbonate

US6617039B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Michael Mager · Leverkusen, DE
• Jurgen Kirsch · Cologne, DE
• Steffen Hofacker · Rockenberg, DE

Key dates

• Filing date: Dec 12, 2001
• Grant date: Sep 9, 2003
• Expiry date: Dec 12, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for coating a substrate with a nitrogen-free compound corresponding to formula (I) and/or a hydrolysis product or condensation product[R1(R2)j]iSiR3k(OR4)4−k−i  (I),whereini represents the number 1, 2 or 3,j represents an integer from 1 to 10,k represents the number 0, 1 or 2,k+i is ≦3, andR1 represents OH, OR, SH, SR, OOC—R,R represents C1-C10-alkyl or C6-C12-aryl,R2 is an unsubstituted, singly substituted, or doubly substituted methylene group,R3 is a substituted or unsubstituted C1-C10-alkyl or C6-C12-aryl group,R4 represents a C1-C10-alkyl or C6-C12-aryl group, andwherein if j represents from 2 to 10 the methylene groups in the chain may optionally be interrupted once or several times by hetero atoms.