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US 12,486,436 B2Granted
Hot melt composition
AssigneeHenkel AG & Co. KGaA
InventorsMasaaki Dobashi, Takahide Morishita, Koji Shirai
Life of this patent
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Abstract
An objective of the present invention is to provide a hot melt composition having a high form maintaining property at a high temperature and being in excellent adhesion to a substrate and in disassembly. The present invention relates to a hot melt composition comprising: (A1) a styrene-ethylene-ethylene/propylene-styrene block copolymer (SEEPS) and (B1) a hydrocarbon-based oil having an aniline point of 135° C. or more.
Claims16
A method of forming a removable article, the method comprising:
- applying a hot melt adhesive to a first substrate at a temperature between 180° C. and 210° C., inclusive, wherein the hot melt adhesive has a shear adhesion value of between 2 N and 6 N, inclusive, the hot melt adhesive comprising:
- a thermoplastic block copolymer present in an amount between 4 wt % and 10 wt %, inclusive, based on the total weight of the hot melt adhesive, the thermoplastic block copolymer comprising a styrene-ethylene-ethylene/propylene-styrene (SEEPS) block copolymer,
- a hydrocarbon-based oil having an aniline point of 135° C. or more, the hydrocarbon-based oil being present in an amount between 40 wt % and 80 wt %, inclusive, based on the total weight of the hot melt adhesive, and
- a polycarbonate diol present in an amount between 3 wt % and 15 wt %, inclusive, based on the total weight of the hot melt adhesive;
- and
- applying a second substrate onto the hot melt adhesive to form the removable article, wherein:
- the shear adhesion value of the hot melt adhesive is a maximum load before adhesive failure as determined by a shear test, the shear test being conducted using two polycarbonate plates bonded together with a layer of the hot melt adhesive having a width of 25 mm and a length of 5 mm, and the shear test comprising subjecting the polycarbonate plates bonded together with the layer of hot melt adhesive to a tensile tester operating at a tension speed of 50 mm/min at a temperature of 23° C. until adhesive failure occurs.
4 more elements
A method of forming a removable article, the method comprising:
- applying a hot melt adhesive to a first substrate at a temperature between 180° C. and 210° C., inclusive, wherein the hot melt adhesive has a shear adhesion value of between 2 N and 6 N, inclusive, the hot melt adhesive comprising:
- a thermoplastic block copolymer, the thermoplastic block copolymer present in an amount between 4 wt % and 10 wt %, inclusive, based on the total weight of the hot melt adhesive, the thermoplastic block copolymer comprising:
- a styrene-ethylene-ethylene/propylene-styrene (SEEPS) block copolymer, and
- a styrene-ethylene/propylene (SEP) block copolymer, a ratio content of the SEP block copolymer, based on 100 parts by weight of the SEEPS block copolymer, being between 5 and 100 parts by weight, inclusive,
- a hydrocarbon-based oil having an aniline point of 135° C. or more, the hydrocarbon-based oil present in an amount of between 40 wt % and 80 wt %, inclusive, based on the total weight of the hot melt adhesive,
- a tackifier resin having a softening point of 120° C. or more, the tackifier resin present in an amount between 30 wt % and 50 wt %, inclusive, based on the total weight of the hot melt adhesive, and
- a polycarbonate diol present in an amount between 3 wt % and 15 wt %, inclusive, based on the total weight of the hot melt adhesive;
- and
- applying a second substrate onto the hot melt adhesive;
- and
- removing the first substrate with a shear force resistance exceeding the shear adhesion value, wherein:
- the shear adhesion value of the hot melt adhesive is a maximum load before adhesive failure as determined by a shear test, the shear test being conducted using two polycarbonate plates bonded together with a layer of the hot melt adhesive having a width of 25 mm and a length of 5 mm, and the shear test comprising subjecting the polycarbonate plates bonded together with the layer of hot melt adhesive to a tensile tester operating at a tension speed of 50 mm/min at a temperature of 23° C. until adhesive failure occurs.
9 more elements
Dependencies are inferred from the claim text.