Compounds containing alkoxysilane and amino groups

• US 5,364,955 A
• Filed: 10/27/1993
• Issued: 11/15/1994
• Est. Priority Date: 11/06/1992
• Status: Expired due to Term

• Current Assignee: Bayer AG
• Original Assignee: Bayer AG
• Inventors: Schmalstieg, Lutz, Pedain, Josef, Zwiener, Christian
• Primary Examiner(s): Shaver, Paul F.
• Application Number:
  US08/144,090
• Time in Patent Office: 384 Days
• Field of Search: 556/418, 556/421, 556/420
• US Class Current: 556/418
• CPC Class Codes: C07F 7/1804 Compounds having Si-O-C linkages Si-O-acyl linkages C07F7/1896
• CPC Class Codes: C08G 18/10 Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• CPC Class Codes: C08G 18/289 containing silicon

Abstract

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.

Claims

1. A compound containing alkoxysilane and amino groups represented by the formula ##STR4## in which R and R'"'"' represent identical or different organic groups that are inert with respect to isocyanate groups at temperatures below 100°

C.,

X, Y and Z represent identical or different organic groups which are inert with respect to isocyanate groups at temperatures below 100°

C., provided that at least one of these groups is an alkoxy group, and

n represents an integer of from 2 to 4.

2. The compound of claim 1 in which

R and R'"'"' represent identical or different alkyl groups having from 1 to 4 carbon atoms,

X represents an alkoxy group having from 1 to 4 carbon atoms,

Y and Z represent identical or different alkyl or alkoxy groups having from 1 to 4 carbon atoms and,

n represents 3.

3. The compound of claim 1 in which

R and R'"'"' each represent a methyl or ethyl group,

X, Y and Z each represent a methoxy group and

n represents 3.

4. A process for producing the compounds of claim 1 in which equimolar quantities of amino-alkyl alkoxysilanes corresponding to the formula ##STR5## in which X, Y and Z represent identical of different organic groups which are inert with respect to isocyanate groups at a temperature below 100°

C., provided that at least one of these groups is an alkoxy group, and

n represents an integer of from 2 to 4, and a maleic or fumaric acid ester corresponding to the formula

space="preserve" listing-type="equation">ROOC--CH═

CH--COOR'"'"' (III)

in which

R and R'"'"' represent identical or different organic groups which are inert with respect to isocyanate groups at temperatures below 100°

C. are reacted within the temperature range of from about 0°

to about 100°

C.

5. The process of claim 4 in which

R and R'"'"' represent identical or different alkyl groups having from 1 to 4 carbon atoms,

X represents an alkoxy group having from 1 to 4 carbon atoms,

Y and Z represent identical or different alkyl or alkoxy groups having from 1 to 4 carbon atoms, and

n represents 3.

6. The process of claim 4 in which

R and R'"'"' each represents a methyl or ethyl group,

X, Y and Z each represent a methoxy group, and

n represents 3.

7. A process for the preparation of prepolymers containing alkoxysilane and urea groups comprising reacting the compound of claim 1 with a polyisocyanate.