- Compounds containing urea and alkoxysilane groups
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The present invention relates to compounds containing alkoxysilane and urea groups corresponding to the formula STR1 wherein X represents identical or different organic groups which are inert to isocyanate groups below 100° C., provided that at least one of these groups is an alkoxy group, Z represents COOR1 or an aromatic ring, R represents the residue obtained by removing the isocyanate groups from an organic monomeric polyisocyanate or a polyisocyanate adduct, R1 and R2 are identical or different and represent organic groups which are inert to isocyanate groups at a temperature of 100° C. or less, R3 and R4 are identical or different and represent hydrogen or organic groups which are inert to isocyanate groups at a temperature of 100° C. or less and n is an integer from 1 to 8. The present invention also relates to the use of these compounds for the preparation of coatings, sealants and adhesives.
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- Compounds containing alkoxysilane and amino groups
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N-alkoxysilylalkyl-aspartic acid esters are prepared by the reaction of equimolar quantities of amino-alkyl alkoxysilanes with maleic or fumaric acid esters. These N-alkoxysilylalkyl-aspartic acid esters are particularly useful as reactants in the preparation of prepolymers containing alkoxysilane and urea groups.
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