Curable compositions containing silylated polyurethanes

US8609800B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Helene Boudet · Hilden, DE
• Andreas Bolte · Goldkronach, DE
• Thomas Bachon · Düsseldorf, DE
• Lars Zander · Rommerskirchen, DE
• Christiane Kunze
• Johann Klein · Goldkronach, DE
• Nicole Ditges · Solingen, DE

Key dates

• Filing date: Oct 18, 2010
• Grant date: Dec 17, 2013
• Expiry date: Feb 11, 2032

Classification

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

Abstract

Silylated polyurethanes can be manufactured by reacting at least one polyol compound, having a molecular weight from 4000 to 20,000 dalton, with a diisocyanate, with a stoichiometric excess of the diisocyanate compound with respect to the polyol compound or compounds, with the result that a polyurethane prepolymer that is isocyanate-terminated is formed; and by subsequently reacting the polyurethane prepolymer with one or more OH-terminated silanes of formula (1) to yield a polyurethane having predominantly terminal alkoxysilyl groups. In formula (1), m is equal to 0, 1, or 2, R1 is an alkyl residue having 1 to 4 carbon atoms, R2 is an alkyl residue having 1 to 4 carbon atoms, R3 is a divalent organic residue having 1 to 12 atoms, selected from C, N, S, and/or O, in the chain, but by preference exclusively carbon atoms, R4 is a hydrogen atom or an alkyl residue having 1 to 10 carbon atoms, and R is a difunctional organic group, preferably a linear or branched alkyl group having 1 to 6 carbon atoms. The silylated polyurethanes are suitable for use in a preparation as an adhesive, sealant, or coating agent.