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US 2002/0120064 A1Published application
Pressure-sensitive adhesive blends comprising ethylene/propylene-derived polymers and propylene-derived polymers and articles therefrom
Assignee3M Innovative Properties Company
InventorsAshish K. Khandpur, Greggory S. Bennett, Allen R. Siedle
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Abstract
The present invention relates to a blend of at least one amorphous ethylene/propylene-derived copolymer, at least one non-stereoregular propylene-derived polymer having a melt viscosity of greater than about 500 Poise, and an optional tackifier that provide pressure-sensitive adhesive compositions in which a good balance of adequate adhesion to both low and relatively high surface energy substrates can be achieved.
Claims24
A pressure-sensitive adhesive composition comprising a blend of:
- at least one amorphous ethylene/propylene-derived copolymer,
- at least one non-stereoregular propylene-derived polymer having a melt viscosity of greater than about 500 Poise, and
- optionally at least one tackifier.
A process for preparing a pressure-sensitive adhesive composition comprising the steps of:
- providing at least one amorphous ethylene/propylene-derived copolymer,
- providing at least one non-stereoregular propylene-derived polymer having a melt viscosity of greater than about 500 Poise,
- optionally, adding at least one tackifier to the composition, and
- blending the composition comprising the at least one amorphous ethylene/propylene-derived copolymer and the least one non-stereoregular propylene-derived polymer to form the pressure-sensitive adhesive composition.
1 more element
Dependencies are inferred from the claim text.