Air stable adhesive stick
AssigneeEastman Chemical Company
InventorsLeo Paul Voegtli, Shane Kipley Kirk
Life of this patent
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Abstract
A solid, air stable adhesive composition containing wax and a polyolefin having a viscosity no greater than 2,000 centipoise and a needle penetration hardness of at least 50 dmm is disclosed. It is further disclosed that propylene-ethylene copolymer is the preferred polyolefin of the present invention.
Claims19
An adhesive composition comprising a blend of:
- a) about 55 to 85 weight percent polyolefin having a penetration hardness of at least about 50 dmm and a viscosity no greater than about 2,000 centipoise at 190.degree. C.;
- and
- b) about 15 to 45 weight percent wax.
An adhesive composition comprising a blend of:
- a) about 40 to 75 weight percent polyolefin having a penetration hardness of at least about 50 dmm and a viscosity no greater than about 2,000 centipoise;
- b) about 15 to 45 weight percent wax;
- and
- c) about 5 to 30 weight percent tackifying resin.
A process for making a solid adhesive comprising blending, at a temperature of about 120 to 130.degree. C., a mixture comprising about 55 to 85 weight percent propylene-ethylene copolymer having a penetration hardness of at least about 5 dmm and a viscosity no greater than about 2,000 centipoise at 190.degree. C. and about 15 to 45 weight percent wax for a time sufficient to form a homogeneous blend.
Dependencies are inferred from the claim text.