Urethane adhesive

Patent metadata

Field	Value
Publication number	US-9738820-B1
Application number	US-201515500537-A
Country	US
Kind code	B1
Filing date	Aug 4, 2015
Priority date	Aug 12, 2014
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

Provided is an adhesive composition comprising (A) one or more polyisocyanate and (B) one or more polymeric polyol, wherein said polymeric polyol is a reaction product of (I) a polyol initiator, wherein said polyol initiator is a reaction product of (a) one or more dihydroxy tertiary amine compound, and (b) a polyhydroxy alcohol, and (II) one or more epoxide compound or one or more glycidyl ether compound or a mixture thereof; wherein said adhesive composition contains solvent in an amount of 0 to 5% by weight based on the weight of said adhesive composition. Also provided is a method of bonding substrates using such an adhesive composition.

First claim

The invention claimed is:

1. An adhesive composition comprising
(A) one or more polyisocyanates and
(B) one or more polymeric polyols, wherein said polymeric polyol is a reaction product of
(I) a polyol initiator, wherein said polyol initiator is a reaction product of
(a) one or more dihydroxy tertiary amines compound having the structure I:

wherein R 1 is hydrogen or a C 1 -C 6 linear or branched alkyl group, and
R 2 and R 3 are independently a C 1 -C 6 linear or branched alkyl group, and

(b) a polyhydroxy alcohol, and

(II) one or more epoxide compound having the structure X:

or one or more glycidyl ether compounds having the structure XI:

or a mixture thereof;
wherein R 4 is hydrogen, phenyl, cyclohexyl, or a C 1 -C 18 linear or branched alkyl, and
R 5 is hydrogen, phenyl, a C 1 -C 6 linear or branched alkyl-substituted phenyl, or a C 1 -C 18 linear or branched alkyl,

wherein said adhesive composition contains solvent in an amount of 0 to 5% by weight based on the weight of said adhesive composition.

2. The adhesive composition of claim 1 , wherein said polyisocyanate comprises one or more aliphatic polyisocyanates.

3. The adhesive composition of claim 1 , wherein R 1 is methyl; R 2 and R 3 are both ethyl; and
said polyhydroxy alcohol is glycerine.

4. A method of bonding a first substrate to a second substrate comprising
(i) applying a layer of the adhesive composition of claim 1 to a surface of said first substrate;
(ii) then bringing a surface of said second substrate into contact with said layer of the adhesive composition of claim 1 ; and
(iii) then curing said layer of the adhesive composition of claim 1 .

5. The method of claim 4 , wherein said first substrate is a film and said second substrate is a film.

Assignees

• Dow Global Technologies Llc

Inventors

• Vinci Daniele
• Bossert Peter

Classifications

• C08G18/4825 Primary

  Polyethers containing two hydroxy groups (C08G18/4833 - C08G18/5096 take precedence) · CPC title

• C09J175/08 Primary

  from polyethers · CPC title

• C08G18/5021

  having nitrogen · CPC title

• C09J2475/00

  Presence of polyurethane · CPC title

• C08G18/10

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