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US 12,643,976 B2Granted
Isocyanate-terminated prepolymers based on polyoxymethylene-polyoxyalkylene block copolymers, process for the preparation and use thereof
AssigneePower2Polymers GmbH
InventorsAnna-Marie Zorn, Christoph Thiebes, Beate Baumbach, Annika Hill, Michael Weinkraut, Mike Schuetze
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Abstract
The present invention relates to isocyanate-terminated prepolymers based on polyoxymethylene-polyoxyalkylene block copolymers, to a process for their preparation, and to the use of these isocyanate-terminated prepolymers as isocyanate components in 1- and 2-component systems for coatings, adhesives and sealants.
Claims17
A process for preparing an isocyanate-terminated prepolymer comprising reacting:
- A) at least one polyisocyanate, wherein component A) has an NCO content according to DIN EN ISO 11909:2007-05 of 15% to 60% by weight;
- B) at least one polyoxymethylene-polyoxyalkylene block copolymer having a hydroxyl number according to DIN 53240-2:2007-11 of 15 mg KOH/g to 200 mg KOH/g;
- C)i) at least one amino-containing polyether based on propylene oxide having a hydroxyl number according to DIN 53240-2:2007-11 of 40 to 80 mg KOH/g, an OH functionality of 4.0 and an amine content according to DIN EN 9702:1998 in the range from 0.5% to 1.0% by weight;
- C)ii) optionally at least one amino-containing polyether based on based on ethylene oxide, propylene oxide or a mixture of ethylene oxide and propylene oxide having an NH2-functionality of 2 or 3, which is different from C) i) the at least one amino-containing polyether;
- and
- D) optionally auxiliaries (D2) containing protic acids and/or auxiliaries (D1) which are not protic acids.
3 more elements
An isocyanate-terminated prepolymer comprising a reaction product of a composition comprising:
- A) at least one polyisocyanate, wherein component A) has an NCO content according to DIN EN ISO 11909:2007-05 of 15% to 60% by weight;
- B) at least one polyoxymethylene-polyoxyalkylene block copolymer having a hydroxyl number according to DIN 53240-2:2007-11 of 15 mg KOH/g to 200 mg KOH/g;
- C)i) at least one amino-containing polyether based on propylene oxide having a hydroxyl number according to DIN 53240-2:2007-11 of 40 to 80 mg KOH/g, an OH functionality of 4.0 and an amine content according to DIN EN 9702:1998 in the range from 0.5% to 1.0% by weight;
- C)ii) optionally at least one amino-containing polyether based on based on ethylene oxide, propylene oxide or a mixture of ethylene oxide and propylene oxide having an NH2-functionality of 2 or 3, with the exception of amino-containing polyethers of component C)i);
- and
- D) optionally auxiliaries containing protic acids (D2) and/or auxiliaries which are not protic acids of D2 (D1).
3 more elements
Dependencies are inferred from the claim text.