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US 12,480,023 B2Granted
Hot-melt adhesive
AssigneeHenkel AG & Co. KGaA
InventorAi Takamori
Life of this patent
Estimating the term…
Abstract
A hot-melt adhesive having reduced thread formation at the time of applying, excellent thermal resistance and thermal stability after bonding. A hot-melt adhesive comprising a copolymer of ethylene and olefins having 3 to 20 carbon atoms (A), a copolymer of ethylene and carboxylate esters having ethylenically unsaturated double bonds (B), a tackifying resin (C) and a wax (D), wherein the copolymer of ethylene and at least one olefin monomer having 3 to 20 carbon atoms (A) comprises a metallocene-type propylene/ethylene copolymer (A1).
Claims14
A hot-melt adhesive comprising:
- a copolymer (A) comprising a mixture of a propylene/ethylene copolymer that is prepared with a metallocene catalyst (A1), an ethylene/octene copolymer that is prepared with a metallocene catalyst (A2), and a metallocene-type ethylene/hexene copolymer (A3);
- a copolymer of ethylene and carboxylate esters having ethylenically unsaturated double bonds (B) comprising an ethylene/vinyl acetate copolymer (B1);
- a tackifying resin (C);
- and
- a wax (D), wherein:
- the propylene/ethylene copolymer (A1) is present in an amount of from 5 to 40 parts by weight, based on 100 parts by total weight of the hot-melt adhesive,
- the ethylene/octene copolymer (A2) is present in an amount of from 10 to 40 parts by weight, based on 100 parts by total weight of the hot-melt adhesive, and
- the hot-melt adhesive has a viscosity of from 500-3000 mPas at 150° C., measured with Brookfield Viscometer, spindle 27.
5 more elements
A hot-melt adhesive comprising:
- a copolymer (A) comprising a mixture of a propylene/ethylene copolymer that is prepared with a metallocene catalyst (A1), an ethylene/octene copolymer that is prepared with a metallocene catalyst (A2), and a metallocene-type ethylene/hexene copolymer (A3);
- a copolymer of ethylene and carboxylate esters having ethylenically unsaturated double bonds (B) comprising an ethylene/vinyl acetate copolymer (B1);
- a tackifying resin (C);
- and
- a wax (D), wherein:
- the propylene/ethylene copolymer (A1) is present in an amount of from 10 to 20 parts by weight, based on 100 parts by total weight of the hot-melt adhesive,
- the ethylene/octene copolymer (A2) is present in an amount of from 10 to 20 parts by weight, based on 100 parts by total weight of the hot-melt adhesive,
- the metallocene-type ethylene/hexene copolymer (A3) is present in an amount of 5 parts by weight, based on 100 parts by total weight of the hot-melt adhesive, and
- the hot-melt adhesive has a viscosity of from 500-3000 mPas at 150° C., measured with Brookfield Viscometer, spindle 27.
6 more elements
Dependencies are inferred from the claim text.