Silane functional binder with thiourethane structure

US9353210B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Hans-Josef Laas · Odenthal, DE
• Berta Vega Sanchez
• Lothar Kahl · Bensberg, DE

Key dates

• Filing date: Aug 28, 2013
• Grant date: May 31, 2016
• Expiry date: Aug 28, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J175/14
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing polyurethanes containing silane groups by reacting at least A) a composition containing a) one or more compounds containing isocyanate and silane groups of general formula (I) and b) <=1 percent by weight, relative to the total mass of composition A), one or more monomeric diisocyanates with aliphatically, cycloaliphatically, araliphatically and/or aromatically bonded isocyanate groups of general formula (II), where R1, R2 and R3 are the same or different radicals and respectively indicate a saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or an optionally substituted aromatic or araliphatic radical with up to 18 carbon atoms, which can contain optionally up to 3 heteroatoms from the series oxygen, sulphur, nitrogen, X is a linear or branched organic radical with at least 2 carbon atoms and Y is a linear or branched, aliphatic or cycloaliphatic radical with 4 to 18 carbon atoms or an optionally substituted aromatic or araliphatic radical with 6 to 18 carbon atoms, with B) an at least difunctional polyol with a numerically average molecular weight Mn of 62 to 22000 g/mol, preferably 90 to 12000 g/mol, while mai…