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US 5,852,080 AGranted
Hot melt adhesives with compatible hydroxyl-containing ester waxes
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsMichael T. Philbin, Robert L. Billmers, Charles W. Paul
Life of this patent
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Abstract
Hydroxyl-containing ester or acid waxes useful in hot melt adhesives to provide compatible compositions with good thermal stability and color retention are disclosed and have the formula: R(OH).sub.n COOR.sup.1 where R is a hydrocarbon group of 12 to 30 carbons, n is 2 to 6 and R is H, C.sub.1 to C.sub.4 alkyl group or (CH.sub.2 CH.sub.2 O).sub.x H where x is 1 to 4.
Claims20
A hot melt adhesive composition comprising:
- 1) a base polymer selected from the group consisting of:
- a) a starch ester having from about 2 to 18 carbon atoms in the ester component and a degree of substitution (DS) of from about 0,3to 3.0, and
- b) a graft copolymer of 40 to 85% wt. % of at least one vinyl monomer and 15 to 60 wt. % of at least one polyalkylene oxide polymer having a number average molecular weight greater than 3000 and a polymerized ethylene oxide content of at least 50% by weight, and
- 2) a compatible hydroxyl-containing ester or acid wax having the formula:
- R(OH).sub.n COOR.sup.1
- where R is a hydrocarbon group of 12 to 30 carbons, n is an integer of 2 to 6 and R.sup.1 is H, C.sub.1 to C.sub.4 alkyl group or (CH.sub.2 CH.sub.2 O).sub.x H where x is 1 or 4, with the ester or acid wax having a melting point of at least 80.degree. C.
3 more elements
Dependencies are inferred from the claim text.