Method of making a polymer network from a polythiol and a polyepoxide

Patent metadata

Field	Value
Publication number	US-10526440-B2
Application number	US-201615565952-A
Country	US
Kind code	B2
Filing date	Apr 29, 2016
Priority date	Apr 29, 2015
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

A method of making a polymer network. The method includes providing a composition including a polythiol having more than one thiol group and a polyepoxide having more than one epoxide group, applying a solution including a photolatent base catalyst to a surface of the composition, and subsequently exposing the composition to light. Upon exposure to light, the photolatent base catalyst photochemically generates a first amine and at least partially cures at least the surface of the composition to form the polymer network.

First claim

What is claimed is:

1. A method of making a polymer network, the method comprising:
providing a composition comprising a polythiol comprising more than one thiol group and a polyepoxide comprising more than one epoxide group;
applying a solution comprising a photolatent base catalyst to a surface of the composition; and
subsequently exposing the composition to light, wherein upon exposure to light, the photolatent base catalyst photochemically generates a first amine that at least partially cures at least the surface of the composition to form a non-tacky skin out of the polymer network;
wherein applying comprises at least one of spraying, brushing, or coating.

2. The method of claim 1 , wherein the solution further comprises a photosensitizer.

3. The method of claim 1 , wherein the solution further comprises a solvent comprising at least one of an aliphatic or alicyclic hydrocarbon, an aromatic solvent, ether, ester, alcohol, ketone, sulfoxide, amide, or halogenated solvent.

4. The method of claim 1 , wherein the light comprises at least one of ultraviolet A light or blue light.

5. The method of claim 1 , wherein the first amine comprises at least one of a tertiary amine or a guanidine.

6. The method of claim 5 , wherein the first amine comprises at least one of triethylamine, dimethylethanolamine, benzyldimethylamine, dimethylaniline, tribenzylamine, triphenylamine, tetramethylguanidine (TMG), 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), 1,4-diazabicyclo[2.2.2]octane (DABCO), diphenylguanidine (DPG), dimethylaminomethyl phenol, and tris(dimethylaminomethyl)phenol.

7. The method of claim 1 , wherein the composition further comprises a catalytic amount of a second amine, which may be the same or different from the first amine.

8. The method of claim 7 , wherein the first amine and the second amine are the same.

9. The method of claim 1 , wherein the polythiol is monomeric.

10. The method of claim 1 , wherein the polythiol is an oligomeric or polymeric polythioether.

11. The method of any claim 1 , wherein the polythiol is an oligomeric or polymeric polysulfide.

12. The method of claim 1 , wherein the composition further comprises at least one of an oxidizing agent or a filler.

13. The method of claim 1 , wherein the polyepoxide is monomeric.

14. The method of claim 1 , wherein the polyepoxide is an oligomeric or polymeric epoxy resin.

15. The method of claim 6 , wherein the composition further comprises a catalytic amount of a second amine, which may be the same or different from the first amine.

16. The method of claim 15 , wherein the first amine and the second amine are the same.

17. The method of claim 6 , wherein the polythiol is an oligomeric or polymeric polythioether.

18. The method of any claim 6 , wherein the polythiol is an oligomeric or polymeric polysulfide.

19. The method of claim 6 , wherein the polyepoxide is an oligomeric or polymeric epoxy resin.

20. The method of claim 7 , wherein the second amine is a tertiary amine.

Assignees

• 3M Innovative Properties Co

Inventors

• Zook Jonathan D
• Demoss Susan E
• Ye Sheng
• Davis Andrew R
• Gong Tao

Classifications

• C08L81/02

  Polythioethers; Polythioether-ethers · CPC title

• C08G75/04

  from mercapto compounds or metallic derivatives thereof (C08G75/0204 takes precedence) · CPC title

• C08G75/02

  Polythioethers · CPC title

• C08G59/686

  containing nitrogen · CPC title

• C08G59/32

  Epoxy compounds containing three or more epoxy groups · CPC title