Adhesive composition

Patent metadata

Field	Value
Publication number	US-9752066-B2
Application number	US-201415035787-A
Country	US
Kind code	B2
Filing date	Nov 17, 2014
Priority date	Nov 18, 2013
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

Provided is a two-part composition comprising
A) An epoxy terminated polyester having the structure

wherein R 1 — is

G- is

j is 0 to 5, —R 2 — is a divalent organic group, —R 22 — is a divalent alkyl group, and —R 22 — is a divalent alkyl group, and

B) one or more epoxy curing agent, each molecule of which comprises two or more active hydrogen atoms that are each capable of reacting with an epoxy group.

First claim

The invention claimed is:

1. A two-part composition comprising
A) an epoxy terminated polyester having the structure

wherein R 1 — is

G- is

j is 0 to 5, —R 2 — is

wherein said —R 3 — and —R 4 — and —R 5 — is each independently a divalent organic group, and wherein said p is 0 to 20,
wherein said —R 3 — is either —(CH 2 ) q — or

wherein q is 1 to 8,
and wherein —R 21 — is a divalent alkyl group, and —R 22 — is a divalent alkyl group, and

B) one or more epoxy curing agent, each molecule of which comprises two or more active hydrogen atoms that are each capable of reacting with an epoxy group.

2. The composition of claim 1 , wherein each of said active hydrogen atoms is part of a primary or secondary amine group.

3. The composition of claim 1 , wherein said curing agent is selected from the group consisting of phenalkamines, Mannich bases, phenalkamides, amine terminated amide resins, aminoimidazolines, and mixtures thereof.

4. The composition of claim 1 , wherein said curing agent has number-average molecular weight of 750 or greater, and wherein the amount of said curing agent having molecular weight of less than 500 is 25% or less by weight based on the weight of said curing agent.

5. The composition of claim 1 , wherein said —R 21 — has 3 carbon atoms and every —R 22 — has 3 carbon atoms.

6. The composition of claim 5 , wherein at least one —R 22 — has the structure selected from

7. The composition of claim 1 , wherein said —R 4 — is either —CH 2 —CH 2 — or —CH 2 —CH 2 —O—CH 2 —CH 2 —.

8. The composition of claim 1 , wherein said —R 21 — has 5 or fewer carbon atoms, and every said —R 22 — has 5 or fewer carbon atoms.

Assignees

• Rohm & Haas
• Dow Global Technologies Llc

Inventors

• Zupancic Joseph J
• Marine Amira A
• Vietti David E
• Vinci Daniele

Classifications

• C08G59/12 Primary

  of polycarboxylic acids with epihalohydrins or precursors thereof · CPC title

• C08G59/50

  Amines · CPC title

• C08G59/40

  characterised by the curing agents used · CPC title

• C08G59/5073

  having two nitrogen atoms in the ring · CPC title

• C09J167/025 Primary

  containing polyether sequences · CPC title