Curable compound comprising silylated polyurethane

US8431675B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Daniela Braun · Shanghai, CN
• Johann Klein · Goldkronach, DE
• Christiane Kunze
• Sara Gonzalez · Goldkronach, DE
• Lars Zander · Rommerskirchen, DE
• Andreas Bolte · Goldkronach, DE
• Helene Boudet · Hilden, DE
• Sarah Schulz · Uerdingen, DE

Key dates

• Filing date: Jun 2, 2010
• Grant date: Apr 30, 2013
• Expiry date: Mar 9, 2031

Classification

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

Abstract

A method for producing a silylated polyurethane including the steps: (A) converting (i) at least polyol compound having a molecular weight of 4,000-30,000 g/mol and at least one monofunctional compound relative to isocyanates and (ii) at least one diisocyanate at a stoichiometric excess of the sum of the polyol compound(s) and monofunctional compound relative to the diisocyanate compound(s), whereby a hydroxyl-terminated polyurethane prepolymer is formed; and (B) converting the polyurethane prepolymer and one or more isocyanate silane(s) of the formula (I): OCN—R—Si—(R1)m(-OR2)3-m, where m is 0, 1 or 2, each R2 is an alkyl radical having 1 to 4 carbon atoms, each R1 is an alkyl radical having 1 to 4 carbon atoms, and R is a difunctional organic group. Also compounds comprising the silylated polyurethane that can be so produced, and the use thereof as an adhesive and sealant or coating composition.