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US 12,692,421 B2Granted
Hot melt adhesive
AssigneeHenkel AG & Co. KGaA
InventorAi Takamori
Life of this patent
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Abstract
Disclosed is a hot melt adhesive comprising: (A) a copolymer of ethylene with an olefin having 3 to 20 carbon atoms; (B) an ethylene-carboxylic acid ester copolymer; and (C) a tackifying resin, wherein the (B) ethylene-carboxylic acid ester copolymer comprises (B1) an ethylene-(meth)acrylic acid ester copolymer containing a structural unit derived from the (meth)acrylic acid ester in an amount of 2 to 24% by mass.
Claims15
A hot melt adhesive composition comprising:
- a copolymer of ethylene and an olefin, the olefin having 3 to 20 carbon atoms;
- an ethylene-carboxylic acid ester copolymer;
- a tackifying resin;
- and
- a wax, wherein:
- the ethylene-carboxylic acid ester copolymer comprises an ethylene-(meth)acrylic acid ester copolymer having a structural unit derived from methyl methacrylate, the structural unit derived from methyl methacrylate being present in an amount of from 2 parts to 20 parts by mass, based on 100 parts by mass of the ethylene-(meth)acrylic acid ester copolymer,
- the copolymer is present in an amount of from 20 to 50 parts by mass, based on 100 parts by total mass of the copolymer, the ethylene-carboxylic acid ester copolymer, and the tackifying resin,
- the ethylene-(meth)acrylic acid ester copolymer is present in an amount of from 1 to 10 parts by mass, based on 100 parts by total mass of the copolymer, the ethylene-carboxylic acid ester copolymer, and the tackifying resin, and
- the tackifying resin is present in an amount of from 40 to 55 parts by mass, based on 100 parts by total mass of the copolymer, the ethylene-carboxylic acid ester copolymer, and the tackifying resin.
6 more elements
Dependencies are inferred from the claim text.