Rubber-based adhesive composition having excellent durability

Patent metadata

Field	Value
Publication number	US-9708511-B2
Application number	US-201414912602-A
Country	US
Kind code	B2
Filing date	Jul 29, 2014
Priority date	Aug 27, 2013
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

The present invention relates to an adhesive composition including: a butyl-based rubber; and a tackifier having a softening point of 90° C. or more.

First claim

The invention claimed is:

1. An adhesive composition comprising:
a butyl-based rubber;
a tackifier having a softening point of 90° C. or more; and
a curing agent selected from the group consisting of an acrylate resin, a methacrylate resin, an isocyanate resin, a melamine resin, a urethane resin, an epoxy resin, an acid anhydride, a polyamine resin, and a carboxy group-containing polymer,

wherein
the butyl-based rubber has an amount of 50 wt % to 70 wt % relative to total weight of the adhesive composition,
the tackifier has an amount of 5 wt % to 10 wt % relative to total weight of the adhesive composition, and
the butyl-based rubber includes repeat units derived from isoprene having an amount of 1 mol % to 5 mol % of the total repeat unit.

2. The adhesive composition of claim 1 , wherein the butyl-based rubber includes at least one selected from the group consisting of a butyl rubber, a bromo-butyl rubber, and a chlorinated butyl rubber.

3. The adhesive composition of claim 1 , wherein the butyl-based rubber has a weight average molecular weight of 50,000 to 2,000,000.

4. The adhesive composition of claim 1 , wherein the tackifier is a rosin-based resin, a rosin ester-based resin, a linear hydrocarbon-based resin or a cyclic olefin-based resin to which hydrogen is added.

5. The adhesive composition of claim 1 , wherein the tackifier has a weight average molecular weight of 500 to 2,000.

6. The adhesive composition of claim 1 , further comprising:
at least one selected from the group consisting of a UV stabilizer, a photoinitiator, a thermal initiator, an antioxidant, a filler and a plasticizer.

7. The adhesive composition of claim 1 , wherein a water vapor transmission rate (WVTR) of the adhesive composition is 10 g/m 2 ·24 hr at a temperature of 38° C. and relative humidity of 90%.

8. The adhesive composition of claim 1 , wherein the curing agent is hexane-1,6-diol diacrylate (HDDA).

Assignees

• Lg Chemical Ltd

Inventors

• Choi Tae-Yi
• Park Eun-Kyung
• Paeng Ju-Hyeon
• Kim Jang-Soon

Classifications

• C08L23/283

  Iso-olefin halogenated homopolymers or copolymers · CPC title

• C08L23/22

  Copolymers of isobutene; Butyl rubber; Homopolymers or copolymers of other iso-olefins · CPC title

• C08L57/02

  Copolymers of mineral oil hydrocarbons · CPC title

• C09J119/00 Primary

  Adhesives based on rubbers, not provided for in groups C09J107/00 - C09J117/00 · CPC title

• C09J109/00

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