Use of polyolefin waxes in hot melt compositions
First Claim
1. A hot melt composition comprising a) 1% to 99% by weight of one or more isotactic homopolymer waxes, isotactic copolymer waxes or a mixture thereof, the one or more waxes comprising the monomers ethylene propylene, higher linear or branched alpha-olefins having 4 to 20 carbon atoms or a combination thereof, the one or more waxes, based on the total weight of the one or more waxes, containing 0.1% to 30% by weight of structural units originating from one monomer and 70% to 99.9% by weight of structural units from the other monomer or monomers, wherein the one or more waxes have a weight-average molecular weight Mw of less than or equal to 40 000 g/mol, are obtained by metallocene catalysis, have a dropping point or ring &
- ball softening point of between 80 and 165°
C., have a melt viscosity, measured at a temperature of 170°
C., of between 20 and 40 000 mPa·
s, and have a glass transition temperature, Tg, of not more than −
20°
C., and b) 1% to 99% by weight of one or more amorphous, atactic polyalpha-olefins.
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Accused Products
Abstract
The invention relates to hot melt compositions based on isotactic, low molecular mass, low viscosity homopolymer or copolymer waxes and atactic polyalpha-olefins (APAOs). Hot melt compositions of this kind can be used with outstanding effect as hot melt adhesives.
52 Citations
15 Claims
-
1. A hot melt composition comprising
a) 1% to 99% by weight of one or more isotactic homopolymer waxes, isotactic copolymer waxes or a mixture thereof, the one or more waxes comprising the monomers ethylene propylene, higher linear or branched alpha-olefins having 4 to 20 carbon atoms or a combination thereof, the one or more waxes, based on the total weight of the one or more waxes, containing 0.1% to 30% by weight of structural units originating from one monomer and 70% to 99.9% by weight of structural units from the other monomer or monomers, wherein the one or more waxes have a weight-average molecular weight Mw of less than or equal to 40 000 g/mol, are obtained by metallocene catalysis, have a dropping point or ring & - ball softening point of between 80 and 165°
C., have a melt viscosity, measured at a temperature of 170°
C., of between 20 and 40 000 mPa·
s, and have a glass transition temperature, Tg, of not more than −
20°
C., andb) 1% to 99% by weight of one or more amorphous, atactic polyalpha-olefins. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- ball softening point of between 80 and 165°
Specification