Low color, aromatic modified C5 hydrocaron resins
OwnerChretien Pieter Louis C. Donker, Elisabeth E.C.G. Gielens +1inventors
InventorsChretien Pieter Louis C. Donker, Elisabeth E.C.G. Gielens, Gerard A. Verrijzer
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Abstract
Low color, aromatic modified C5 hydrocarbon resins are disclosed. The resins are predominantly an aromatic modified piperylene resin. The resins are useful as tackifies in hot melt adhesives and hot melt pressure sensitive adhesives.
Claims25
A process for making a hydrocarbon copolymer resin having a Gardner color of less than about 4 and having a ring and ball softening point from about 85 to about 100° C. comprising:
- (a) providing a first predominantly C5 hydrocarbon stream containing unsaturated aliphatic monomers, said unsaturated aliphatic monomers comprising a combination of piperylene monomers, less than about 2% weight cyclopentadiene and dicyclopentadiene monomers and less than about 1% weight isoprene;
- (b) providing a second hydrocarbon stream comprising a monovinyl aromatic C5 to C12 monomer;
- (c) combining said streams to obtain a weight ratio of said unsaturated aliphatic monomers to said monovinyl aromatic C8 to C12 monomers from about 1.5/1 to about 25/1;
- (d) polymerizing said combined streams at a temperature from about 25 to about 75° C.;
- and
- (e) recovering said copolymer resin.
A hydrocarbon copolymer resin comprising a reaction product of:
- (a) a first predominantly C5 hydrocarbon stream containing unsaturated aliphatic monomers, said unsaturated aliphatic monomers comprising a combination of piperylene monomers, less than about 2% weight cyclopentadiene and dicyclopentadiene monomers and less than about 1% weight isoprene;
- and
- (b) a second hydrocarbon stream comprising a monovinyl aromatic C8 to C12 monomer;
- wherein a weight ratio of said unsaturated aliphatic monomers to said monovinyl aromatic C8 to C12 monomers is from about 1.5/1 to about 6/1 to yield said resin having a Gardner color of less than about 4 and having a ring and ball softening point from about 85 to about 100° C.
A hydrocarbon copolymer resin comprising a reaction product of:
- (a) a first predominantly C5 hydrocarbon stream containing unsaturated aliphatic monomers, said unsaturated aliphatic monomers comprising a combination of piperylene monomers, less than about 2% weight cyclopentadiene and dicyclopentadiene monomers and less than about 1% weight isoprene;
- and
- (b) a second hydrocarbon stream comprising a monovinyl aromatic C8 to C12 monomer;
- wherein a weight ratio of said unsaturated aliphatic monomers to said monovinyl aromatic C8 to C12 monomers is from about 15/1 to about 50/1 to yield said resin having a Gardner color of less than about 4 and having a ring and ball softening point from about 85 to about 100° C.
Dependencies are inferred from the claim text.