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US 12,168,740 B2Granted
Clear hot melt adhesives
AssigneeAvery Dennison Corporation
InventorJarkko T. Pitko
Life of this patent
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Abstract
Hot melt adhesives comprising (i) styrene butadiene copolymer, (ii) olefin block copolymer (OBC), and (iii) water white hydrogenated hydrocarbon resin are described. The adhesives exhibit high optical clarity and are relatively clear over a wide range of temperatures. The adhesives also exhibit good adhesion at cold temperatures. Also described are laminates of the adhesive with polymeric films, such as adhesive labels that can be used in labeling containers. In addition, various goods such as containers labeled using the adhesives are described.
Claims37
A hot melt adhesive comprising:
- a styrene butadiene block copolymer, the styrene butadiene block copolymer comprises a fully hydrogenated styrene butadiene block copolymer and a partially hydrogenated styrene butadiene block copolymer;
- an olefin block copolymer, the olefin block copolymer comprises at least one crystalline ethylene block and another block comprising at least one C3-C20 alpha-olefin;
- a water white hydrocarbon resin, and
- a plasticizer that is not an oil plasticizer,
- wherein the plasticizer content is within a range of about 15% to about 25% by weight.
2 more elements
A hot melt adhesive consisting of:
- a styrene butadiene block copolymer, the styrene butadiene block copolymer comprises at least one of a fully hydrogenated styrene butadiene block copolymer and a partially hydrogenated styrene butadiene block copolymer;
- an olefin block copolymer, the olefin block copolymer comprises at least one crystalline ethylene block and another block comprising at least one C3-C20 alpha-olefin;
- a water white hydrocarbon resin, and
- a plasticizer that is not an oil plasticizer,
- wherein the plasticizer content is within a range of about 15% to about 25% by weight.
2 more elements
Dependencies are inferred from the claim text.