Polyurethane-based reactive adhesives in which the isocyanate is stabilized by a polyether amine

• US 5,104,959 A
• Filed: 06/11/1990
• Issued: 04/14/1992
• Est. Priority Date: 06/16/1989
• Status: Expired due to Fees

• Current Assignee: Bayer AG
• Original Assignee: Bayer AG
• Inventors: Groglerl, Gerhard, Hess, Heinrich, Kopp, Richard, Stepanski, Horst, Schafer, Walter, Hombach, Rudolf
• Primary Examiner(s): Welsh, Maurice J.
• Assistant Examiner(s): GORR, RACHEL F
• Application Number:
  US07/536,140
• Time in Patent Office: 673 Days
• Field of Search: 528/79, 528/902, 528/905, 156/331.4, 156/331.7, 427/385.5
• US Class Current: 528/79
• CPC Class Codes: C08G 18/3243 containing two or more aromatic rings
• CPC Class Codes: C08G 18/5024 containing primary and/or secondary amino groups
• CPC Class Codes: C08G 18/6685 with compounds of group C08G18/3225 or polyamines of C08G18/38
• CPC Class Codes: C08G 18/707 the liquid medium being a compound containing active hydrogen not comprising water
• CPC Class Codes: C09J 175/12 from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group
• CPC Class Codes: Y10S 528/902 Particulate material prepared from an isocyanate
• CPC Class Codes: Y10S 528/905 Polymer prepared from isocyanate reactant has adhesive property

Abstract

The present invention is directed to a polyurethane-based reactive adhesive comprising A) at least one polyisocyanate, B) at least one polyol, and C) at least one polyamine C which is a polyether amine containing at least two amino groups, at least one phenyl group and recurring polyoxyalkylene units.

Claims

1. A polyurethane-based reactive adhesive comprising A) at least one polyisocyanate, B) at least one polyol, and C) at least one polyamine C which is a polyether amine containing at least two amino groups, at least one phenyl group and recurring polyoxyalkylene units.

2. The reactive adhesive of claim 1, wherein the phenyl group of the polyamine is obtainable by removal of two phenolic OH groups from a compound selected from the group consisting of 2,2-bis-(4-hydroxyphenyl)-propane, 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethyl cyclohexane, and 1,4-bis-(2-hydroxyethoxy) benzene.

3. The reactive adhesive of claim 1 wherein the polyether amine C) corresponds to the following general formula ##STR4## wherein A represents an optionally substituted chain of optionally different alkylenes interrupted by 0 atoms, and R¹ and R² represents a C_1-6 alkyl radical, or, together with the C atoms connecting them, represent the residue for completing a carbocyclic ring.

4. The reactive adhesive of claim 1 wherein the polyether amine corresponds to the following formula ##STR5## with n=1-50.

5. The reactive adhesive of claim 1 wherein the polyether amine has a molecular weight in the range from 400 to 6,000.

6. The reactive adhesive of claim 1 wherein the polyisocyanate is selected from the group consisting of 1,5-naphthalene diisocyanate, dimeric 4,4'"'"'-diisocyanatodiphenyl methane, dimeric 2,4-diisocyanatotoluene, 3,3'"'"'-diisocyanato-4,4'"'"'-dimethyl-N,N'"'"'-diphenyl urea and N,N'"'"'-bis-[4-(4- or 2-isocyanatophenylmethyl)-phenyl]-urea.

7. The reactive adhesive of claim 1 wherein the polyol B) has a molecular weight in the range from 400 to 10,000.

8. The reactive adhesive of claim 1 containing from 0.2 to 1 mol of B) and 0.1 to 1 mol of C) per mol of A).

9. In a process for the bonding of substrates comprising applying an adhesive to at least one of the surfaces to be joined, bringing the surfaces to be joined together, and allowing the adhesive to fully cure, the improvement wherein the adhesive is the adhesive of claim 1.