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US 5,256,717 AGranted
Hot melt adhesives useful in temporary bonding operations
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsDaniel Stauffer, Paul Puletti
Life of this patent
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Abstract
Hot melt adhesives having suitable open time and crystallinity properties making them especially useful as temporary adhesives are provided by a composition comprising a combination of 5 to 50% by weight of an isotactic thermoplastic polybutylene copolymer or a low density ethylene polymer with 3 to 65% by weight of a solid benzoate plasticizer.
Claims19
A hot melt adhesive composition having long open time and delayed but increasing crystallinity comprising:
- a) from about 5 to 50% by weight of a polymer selected from the group consisting of:
- i) an isotatic thermoplastic polybutene-1/ethylene copolymer containing from 5.5 to 10% by weight of ethylene, and
- ii) low density polyethylene;
- b) from about 3 to 65% by weight of a solid benzoate plasticizer having the formula:
- ##STR2## where R is an organic residue and x is 2 to 8;
- c) from about 20 to 90% by weight of a tackifer;
- and
- d) from about 0 to 2% by weight of an antioxidant.
5 more elements
Dependencies are inferred from the claim text.