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US 10,414,956 B2Granted
Adhesive composition for protective film on painting, and manufacturing process thereof
AssigneePolyOne Corporation
InventorsNorio Masuko, Hiroshi Kato
Life of this patent
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Abstract
To provide An adhesive composition for a protective film to suppress a surface pollution and adhesive residue on a painting surface. The adhesive composition comprises: 100 weight parts of given block copolymer, and 1 to 20 weight parts of a given polar tackifier resin compound, 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.
Claims29
An adhesive composition for a protective film on a painting, consisting of:
- 100 weight parts of hydrogenated block copolymer having a formula (A-B)nX;
- and
- 1 to 20 weight parts of a polar tackifier resin compound,
- wherein each block A is a polymer block of one or more mono alkenyl arenes having a number average 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,
- wherein the polar 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), and
- wherein the polar tackifier resin compound is selected from the group consisting of terpene resin, terpene phenol resin, hydrogenated terpene resin, aromatic-modified terpene resin, and aliphatic cyclic partially saturated hydrocarbon compound.
6 more elements
A protective film for protecting a painting, consisting of:
- a base layer;
- and
- an adhesive layer including an adhesive composition, the adhesive composition consisting of:
- 100 weight parts of hydrogenated block copolymer having a formula (A-B)nX;
- and
- 1 to 20 weight parts of a polar tackifier resin compound,
- wherein each block A is a polymer block of one or more mono alkenyl arenes having a number average molecular weight between 3,000 and 60,000 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,
- wherein the polar 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);
- and
- wherein the polar tackifier resin compound is selected from the group consisting of terpene resin, terpene phenol resin, hydrogenated terpene resin, aromatic-modified terpene resin, and aliphatic cyclic partially saturated hydrocarbon compounds.
10 more elements
A process for manufacturing an adhesive composition in a form of pellet for a protective film used for protecting a painting, the process consisting of the steps of:
- dry-blending 100 weight parts of a block copolymer having the formula (A-B)nX with 1 to 20 weight parts of a polar tackifier resin compound to obtain a dry-blend without substantially using a plasticizer oil;
- extruding the dry-blend in an extruder to obtain an extrudate;
- pelletizing the extrudate with an underwater pelletizer to obtain wet pellets;
- and
- drying the wet pellets to obtain pellets containing the adhesive composition,
- wherein each block A is a polymer block of one or more mono alkenyl arenes having a number average molecular weight between 3,000 and 60,000 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,
- wherein the polar 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), and
- wherein the polar tackifier resin compound is selected from the group consisting of terpene resin, terpene phenol resin, hydrogenated terpene resin, aromatic-modified terpene resin, and aliphatic cyclic partially saturated hydrocarbon compounds.
8 more elements
Dependencies are inferred from the claim text.