Method for producing a thermosetting polyurethane from a thermoplastic polyurethane and thermoset polyurethane obtainable using said method
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United States of America Patent
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Mar 1, 2005
Issued Date -
N/A
app pub date -
Dec 10, 2001
filing date -
Jun 8, 1999
priority date (Note) -
Expired
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Abstract
A method for producing thermosetting polyurethane ##STR1## after transformation from thermoplastic polyurethane with a hydrolyzable organo-silane which is grafted onto macromolecules of said thermoplastic polyurethane by means of a bonding agent. Said organo-silane has general formula (I), wherein R.sub.1,R.sub.2,R.sub.3 =aliphatic alkyl, aromatic alkyl; n>1; R4 is an organic radical which can react with said bonding agent which comprises at least two isocyanate functions and the thermoplastic polyurethane obtained can, after transformation, become automatically cross-linked by coming into contact with water molecules in order to become thermosetting. The invention also relates to a product which can be obtained according to the inventive method.
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