Optical transparent dual cure adhesives composition

Patent metadata

Field	Value
Publication number	US-9708518-B2
Application number	US-201514874915-A
Country	US
Kind code	B2
Filing date	Oct 5, 2015
Priority date	Aug 12, 2011
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

The present invention relates to an optical transparent dual cure adhesive, and process for preparing this dual cure adhesive, and uses thereof. More particularly, the present invention relates to optical transparent adhesive, which is both capable of being UV-light cured and thermal cured, for example, it can be used for the bonding of touch screen of an electronic device and substrate.

First claim

What is claimed is:

1. An optical transparent dual cure adhesive composition, based on the total weight of the adhesive composition, the composition comprises:
30-60 wt % of polyisoprene having a vinyl group but no (meth)acryloxy group;
25-45 wt % of (meth)acrylate;
10-40 wt % of liquid polybutadiene,
2-3 wt % of UV-photoinitiator, and
2-3 wt % of thermal initiator selected from tert-butyl peroxybenzoate, 1,1-di(tert-butyl peroxy)-3,3,5-trimethylcyclohexane and mixtures thereof.

2. The composition according to claim 1 , wherein
said polyisoprene has an average degree of functionality of 0.5-3 and a number average molecular weight of 10000-50000 Daltons; and
said liquid polybutadiene has a number average molecular weight of 1000-30000 Daltons.

3. The composition according to claim 2 , wherein said polyisoprene has a number average molecular weight of 12000-40000 Daltons.

4. The composition according to claim 2 , wherein said polyisoprene has a number average molecular weight of 15000-35000 Daltons.

5. The composition according to claim 2 , wherein said liquid polybutadiene has a number average molecular weight of 1500-25000 Daltons.

6. The composition according to claim 2 , wherein said liquid polybutadiene has a number average molecular weight of 2000-20000 Daltons.

7. The composition according to claim 2 , wherein said liquid polybutadiene has a number average molecular weight of 3000-10000 Daltons.

8. The composition according to claim 1 , wherein said liquid polybutadiene is present in an amount of 20-35 wt %.

9. An optical transparent dual cure adhesive composition, based on the total weight of the adhesive composition, the composition consisting of:
30-60 wt % of polyisoprene having a vinyl group but no (meth)acryloxy group;
25-45 wt % of (meth)acrylate;
10-40 wt % of liquid polybutadiene,
2-3 wt % of UV-photoinitiator, and
2-3 wt % of thermal initiator selected from tert-butyl peroxybenzoate, 1,1-di(tert-butyl peroxy)-3,3,5-trimethylcyclohexane and mixtures thereof.

Assignees

• Henkel Ag & Co Kgaa
• Henkel IP & Holding GmbH

Inventors

• Zhang Rui
• Lu Daoqiang

Classifications

• C09J175/14

  Polyurethanes having carbon-to-carbon unsaturated bonds · CPC title

• C09J133/14

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title

• C09J4/06

  {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00 · CPC title

• C09J133/06

  of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical · CPC title

• C09J109/00

  Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons · CPC title