Polypropylene impact copolymer based hot melt adhesive
AssigneeBostik SA
InventorsPatrick John Czaplewski, Steven Daniel Gray
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Abstract
A hot melt adhesive using polypropylene impact copolymers that is particularly well suited for elastic attachment and stretch films in diaper structures. The hot melt adhesive composition is a blend of about 2.5% to about 30%, by weight, of a polypropylene impact copolymer; about 2.5% to about 30%, by weight, of an olefin based elastomer; about 10% to about 70%, by weight, of a tackifying resin having a softening point of at least about 80° C. and up to about 140° C.; about 0% to about 60%, by weight, of a plasticizer; and about 0.1% to about 5% of a stabilizer or antioxidant.
Claims28
A hot melt adhesive composition, comprising a blend of the following components:
- about 2.5% to about 20% by weight, of a nonfunctionalized polypropylene impact copolymer;
- about 2.5% to about 20% by weight, of an olefin based elastomer;
- about 25% to about 65% by weight, of a tackifying resin having a softening point of at least about 80° C. and up to about 140° C.;
- about 20% to 25.5% by weight, of a plasticizer, wherein said plasticizer is mineral oil;
- about 0.1% to about 5% of a stabilizer antioxidant;
- and
- wherein the components total 100% by weight of the composition, and the viscosity of the composition is equal to or less than about 20,000 mPas at 163° C.
Dependencies are inferred from the claim text.