Amino-functional polyurethane prepolymers and a process for...

Details Amino-functional polyurethane prepolymers and a process for... Amino-functional polyurethane prepolymers and a process for...

2005-06-30

2008-12-23

Sergent, Rabon (Department: 1796)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C252S182130, C252S182220, C252S182230, C525S523000, C525S528000, C528S028000, C528S059000, C528S068000, C528S076000, C528S087000, C528S111000, C528S120000, C528S121000, C528S122000, C528S123000, C528S407000, C560S019000, C560S026000, C560S115000, C560S155000, C560S158000, C560S159000

Reexamination Certificate

active

07468454

ABSTRACT:
The present invention relates to a process for preparing amino-functional polyurethane prepolymers bya) preparing an NCO-functional polyurethane prepolymer by reacting an excess of one or more di- and/or polyisocyanates with at least one isocyanate-reactive compound having a functionality of at least 1.5,b) reacting the free NCO groups of the resulting polyurethane prepolymer with at least one compound containing one or more silanol groups to obtain the corresponding silylurethanes, and thenc) converting the silylurethanes to amino-functional polyurethane prepolymers by hydrolysis and/or alcoholysis with decarboxylation.The present invention also relates coatings, adhesives, sealants, casting compounds or moldings obtained from these amino-functional polyurethene prepolymers. Finally, the present invention relates to reactive systems containing the amino-functional polyurethane prepolymers, compounds containing on average more than one oxirane group per molecule, and optionally organic amines and additives.

REFERENCES:
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patent: 61-215397 (1986-09-01), None
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