Moisture-curable, polyether urethanes with reactive silane groups and their use as sealants, adhesive and coatings

US6809170B2 · kind B2 · utility

Assignees

• Bayer MaterialScience AG · DE
• BAYER HEALTHCARE LLC · DE

Inventors

• Richard R. Roesler · Wexford, US
• Derek L. Crawford · Berkvam Road, US
• Kurt C. Frisch · Midland, US
• Karsten Danielmeier · Solingen, DE
• Dinesh Pethiyagoda · Pittsburgh, US
• Gerhard Ruttmann · Burscheid, DE

Key dates

• Filing date: Oct 22, 2003
• Grant date: Oct 26, 2004
• Expiry date: Oct 22, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2190/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Preparation of moisture-curable, alkoxysilane-functional polyether urethanes by reacting at an NCO:OH equivalent ratio of 1.5:1 to 2.5:1a) a hydroxyl component containing i) 20 to 100 wt. %, of a polyether diol and other polyether segments, where the polyether segments have Mn of at least 3000 and degree of unsaturation of less than 0.04 meq/g, where the sum of Mn of polyether segments per molecule averages 6000 to 20,000, and ii) 0 to 80 wt. % of a polyether monool and other polyether segments having Mn of 1000 to 15,000, withb) an isocyanate component containing i) 20 to 100 wt. % of a diisocyanate, and ii) 0 to 80 wt. % of a monoisocyanate, forming an isocyanate-containing reaction product reacted at an equivalent ratio of 0.8:1 to 1.1:1 withc) a compound containing an isocyanate-reactive group and reactive silane groups where at least 10 mole % is a compound of formula