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1. EP3184597 - ACRYLIC ADHESIVE COMPOSITION AND ADHESIVE PRODUCT

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]
Claims

1. A pressure-sensitive adhesive composition comprising:

(i) 100 parts by mass of an acrylic block copolymer (I) including at least one polymer block (A) containing methacrylate ester units and at least one polymer block (B) containing acrylate ester units, the acrylic block copolymer (I) having a weight average molecular weight of 30,000 to 300,000, the acrylate ester units in the polymer block (B) including not less than 80 mass% of units from an acrylate ester (1) represented by the general formula (1):

        CH2=CH-COOR2

(wherein R2 is an organic group having 7 to 12 carbon atoms);

(ii) 1 to 300 parts by mass of a tackifier resin; and

(iii) 1 to 200 parts by mass of at least one plasticizer selected from process oils, and organic acid esters and oligomers thereof.


  2. The pressure-sensitive adhesive composition according to Claim 1, wherein the plasticizer (iii) is a process oil.
  3. The pressure-sensitive adhesive composition according to Claim 1 or 2, wherein the tackifier resin (ii) is at least one selected from hydrocarbon resins, terpene resins, rosin resins and hydrogenated products of these resins.
  4. The pressure-sensitive adhesive composition according to any of Claims 1 to 3, wherein the acrylate ester (1) represented by the formula (1) is 2-ethylhexyl acrylate.
  5. The pressure-sensitive adhesive composition according to any of Claims 1 to 4, wherein the acrylate ester units in the polymer block (B) consist solely of units from an acrylate ester (1) represented by the general formula (1):

        CH 2=CH-COOR 2

(wherein R 2 is an organic group having 7 to 12 carbon atoms).
  6. The pressure-sensitive adhesive composition according to any of Claims 1 to 5, wherein the composition includes two or more kinds of tackifier resins (ii).
  7. A pressure-sensitive adhesive product comprising a pressure-sensitive adhesive layer including the pressure-sensitive adhesive composition described in any of Claims 1 to 6.
  8. A laminate comprising a pressure-sensitive adhesive layer including the pressure-sensitive adhesive composition described in any of Claims 1 to 6.
  9. A film comprising a pressure-sensitive adhesive layer including the pressure-sensitive adhesive composition described in any of Claims 1 to 6.