Rubber-based adhesive composition having excellent durability

• US 9,708,511 B2
• Filed: 07/29/2014
• Issued: 07/18/2017
• Est. Priority Date: 08/27/2013
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Choi, Tae-Yi, Park, Eun-Kyung, Paeng, Ju-Hyeon, Kim, Jang-Soon
• Primary Examiner(s): WHITELEY, JESSICA
• Application Number:
  US14/912,602
• Publication Number:
  US 20160200948A1
• Time in Patent Office: 1,085 Days
• Field of Search: 522158, 522157, 522150, 522 1, 522161, 520 1
• CPC Class Codes: C08L 23/22 Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
• CPC Class Codes: C08L 23/283 Halogenated homo- or copolymers of iso-olefins
• CPC Class Codes: C08L 57/02 Copolymers of mineral oil hydrocarbons
• CPC Class Codes: C08L 9/00 Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• CPC Class Codes: C08L 93/04 Rosin
• CPC Class Codes: C09J 109/00 Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons
• CPC Class Codes: C09J 11/08 Macromolecular additives
• CPC Class Codes: C09J 119/00 Adhesives based on rubbers, not provided for in groups C09J107/00 - C09J117/00
• CPC Class Codes: C09J 123/22 Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefines
• CPC Class Codes: C09J 123/283 Halogenated homo- or copolymers of iso-olefines

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.

Claims

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/m²·

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).