Rubber-based adhesive composition and rubber-based adhesive using same

Patent metadata

Field	Value
Publication number	US-11261353-B2
Application number	US-202016733895-A
Country	US
Kind code	B2
Filing date	Jan 3, 2020
Priority date	Nov 11, 2014
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

The present invention relates to a rubber-based adhesive composition and a rubber-based adhesive using the same, the composition including: a rubber-based resin; and a rosin-based resin having at least one hydrophilic group.

First claim

The invention claimed is:

1. A rubber-based adhesive, which is a cured product of a rubber-based adhesive composition comprising:
a rubber-based resin; and
a rosin-based resin having three hydrophilic groups, and
wherein at least one of the three hydrophilic groups is a carboxyl group, and at least another one of the three hydrophilic groups is selected from the group consisting of a hydroxyl group, a sulfonic group, and an amino group.

2. The rubber-based adhesive of claim 1 , wherein the rubber-based adhesive has a thickness of 10 μm to 200 μm.

3. The rubber-based adhesive of claim 1 , wherein the rubber-based adhesive has an adhesive strength of 500 g/in or more.

4. The rubber-based adhesive of claim 1 , wherein the rubber-based adhesive has a water vapor transmission rate of 10 g/m 2 ·24 hr or less at a temperature of 38° C. and a relative humidity of 90%.

5. The rubber-based adhesive of claim 1 , wherein the rosin-based resin comprises a structure represented by any one of the following [Chemical Formula 5] to [Chemical Formula 7]:

6. The rubber-based adhesive of claim 1 , wherein the rosin-based resin has a softening point of 70° C. to 110° C.

7. The rubber-based adhesive of claim 1 , wherein an amount of the rosin-based resin is 1 part by weight to 40 parts by weight based on 100 parts by weight of the rubber-based adhesive composition.

8. The rubber-based adhesive of claim 1 , wherein the rubber-based resin comprises one or more selected from the group consisting of a butyl-based rubber, a styrene-butadiene-styrene (SBS)-based rubber, a styrene-butadiene (SB)-based rubber, a styrene-isoprene-styrene (SIS)-based rubber, a styrene-ethylene-butylene-styrene (SEBS)-based rubber, and a natural rubber (LATEX).

9. The rubber-based adhesive of claim 8 , wherein the butyl-based rubber comprises one or more selected from the group consisting of a butyl rubber, a bromo butyl rubber, and a chlorinated butyl rubber.

10. The rubber-based adhesive of claim 1 , wherein an amount of the rubber-based resin is 50 parts by weight to 80 parts by weight based on 100 parts by weight of the rubber-based adhesive composition.

11. The rubber-based adhesive of claim 1 , further comprising one or more selected from the group consisting of a UV curing agent, a UV stabilizer, a photoinitiator, a thermal initiator, an antioxidant, a filler, and a plasticizer.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Seung-Won
• Park Eun-Kyung
• Choi Won-Gu
• Kim Jang-Soon
• Kim Sang-Hwan
• Choi Tae-Yi

Classifications

• C09J121/00 Primary

  Adhesives based on unspecified rubbers · CPC title

• C09J11/08 Primary

  Macromolecular additives · CPC title

• C09J11/00

  Features of adhesives not provided for in group C09J9/00, e.g. additives · CPC title

• C08L93/04

  Rosin · CPC title

• C09J193/04

  Rosin · CPC title