| 主权项 |
1. An adhesive composition for a protective film on a painting, comprising:
100 weight parts of hydrogenated block copolymer having one or more formulae of A-B-A, (A-B)n, (A-B-A)nX, and (A-B)nX; and 1 to 20 weight parts of a polar tackifier resin compound, wherein the adhesive composition is substantially free of a plasticizer oil, wherein each block A is a polymer block of one or more mono alkenyl arenes having a molecular weight between 3,000 and 60,000 g/mol as styrene equivalent peak molecular weight according to ASTM 3536, and each block B is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene, n is an integer from 2 to 30, and X is coupling agent residue, wherein the total amount of mono alkenyl arene in the block copolymer is between 15 and 50 percent by weight, wherein the amount of mono alkenyl arene in each block B is between 10 and 45 percent by weight, wherein the polar tackifier resin compound has a solubility parameter (SP value) of 8.2 to 9.2 calculated by the Small method using Hoy's constant, and wherein the tackifier resin compound has a softening point equal to or greater than 110° C. as determined by the Ring and Ball method (ASTM E-28). |
