Adhesive Composition and Production Method Therefor

Patent metadata

Field	Value
Publication number	US-2018208815-A1
Application number	US-201615745705-A
Country	US
Kind code	A1
Filing date	Jul 15, 2016
Priority date	Jul 17, 2015
Publication date	Jul 26, 2018
Grant date	—

Abstract

The present technology provides a one-part moisture curable adhesive composition and a production method thereof. The adhesive composition contains: a preliminary composition containing a urethane prepolymer and a reaction product of an aliphatic isocyanate A and an aminosilane compound B or a monoterpene alcohol; and a dimethyl tin catalyst represented by Formula (1) below. In Formula (1), X 1 and X 2 each independently represent a divalent heteroatom and R 1 and R 2 each independently represent a hydrocarbon group that may have a heteroatom.

First claim

1 . A one-part moisture curable adhesive composition comprising:
a preliminary composition containing a urethane prepolymer and a reaction product of an aliphatic isocyanate A and an aminosilane compound B or a monoterpene alcohol; and a dimethyl tin catalyst represented by Formula (1):

wherein, X 1 and X 2 each independently represent a divalent heteroatom and R 1 and R 2 each independently represent a hydrocarbon group that may have a heteroatom.

2 . The adhesive composition according to claim 1 , wherein the divalent heteroatom is at least one type selected from the group consisting of an oxygen atom and a sulfur atom.

3 . The adhesive composition according to claim 1 , wherein the X 1 moiety and the X 2 moiety are each a sulfur atom, and
the R 1 moiety and the R 2 moiety are each an unsubstituted or ester bond-containing alkyl group.

4 . The adhesive composition according to claim 1 , wherein the X 1 moiety and the X 2 moiety are each an oxygen atom, and
the R 1 moiety and the R 2 moiety are each a carbonyl group-containing alkyl group.

5 . The adhesive composition according to claim 1 , wherein a content of the dimethyl tin catalyst is from 0.001 to 0.3 parts by mass per 100 parts by mass of the urethane prepolymer.

6 . The adhesive composition according to claim 1 , wherein the aliphatic isocyanate A is at least one type of hexamethylene diisocyanate modified product selected from the group consisting of reaction products of hexamethylene diisocyanate and a polyol having tri- or higher functionality, allophanates of hexamethylene diisocyanate, isocyanurates of hexamethylene diisocyanate, and biurets of hexamethylene diisocyanate.

7 . The adhesive composition according to claim 1 , wherein the aminosilane compound B has an imino group, and the imino group bonds to at least one aromatic hydrocarbon group.

8 . The adhesive composition according to claim 1 , further comprising a tertiary amine.

9 . The adhesive composition according to claim 1 , wherein the preliminary composition further contains a filler.

10 . The adhesive composition according to claim 1 , wherein the preliminary composition further contains a plasticizer.

11 . A method of producing an adhesive composition, the method comprising:
a reaction step of obtaining the reaction product by reacting the aliphatic isocyanate A and the aminosilane compound B or the monoterpene alcohol; a mixing step 1 of obtaining the preliminary composition by mixing the urethane prepolymer and the reaction product; and a mixing step 2 of producing the adhesive composition described in claim 1 by mixing the preliminary composition and the dimethyl tin catalyst.

12 . The method of producing the adhesive composition according to claim 11 , wherein in the mixing step 1, at least one type selected from the group consisting of fillers and plasticizers is further used.

13 . The method of producing the adhesive composition according to claim 11 , wherein in the mixing step 2, a tertiary amine is further used.

14 . The adhesive composition according to claim 2 , wherein the X 1 moiety and the X 2 moiety are each a sulfur atom, and
the R 1 moiety and the R 2 moiety are each an unsubstituted or ester bond-containing alkyl group.

15 . The adhesive composition according to claim 2 , wherein the X 1 moiety and the X 2 moiety are each an oxygen atom, and
the R 1 moiety and the R 2 moiety are each a carbonyl group-containing alkyl group.

16 . The adhesive composition according to claim 2 , wherein a content of the dimethyl tin catalyst is from 0.001 to 0.3 parts by mass per 100 parts by mass of the urethane prepolymer.

17 . The adhesive composition according to claim 2 , wherein the aliphatic isocyanate A is at least one type of hexamethylene diisocyanate modified product selected from the group consisting of reaction products of hexamethylene diisocyanate and a polyol having tri- or higher functionality, allophanates of hexamethylene diisocyanate, isocyanurates of hexamethylene diisocyanate, and biurets of hexamethylene diisocyanate.

18 . The adhesive composition according to claim 2 , wherein the aminosilane compound B has an imino group, and the imino group bonds to at least one aromatic hydrocarbon group.

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Araki Kiminori

Classifications

• C09J175/12 Primary

  from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group · CPC title

• C08G18/73

  acyclic · CPC title

• C08G18/242

  organometallic compounds containing tin-carbon bonds · CPC title

• C08G18/10

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title