Claims
- 1. A hydrogenated petroleum hydrocarbon resin suitable for use as a tackifier in an adhesive composition, said hydrogenated resin having a softening point of about 0.degree.-40.degree. C., a number average molecular weight Mn of about 100 to 900, a Gardner color of 6 or less, and a piperylene-derived content of about 5-50 weight percent, said resin being prepared by the aluminum chloride catalyzed Friedel-Crafts polymerization of a hydrocarbon feed comprising:
- (a) less than about 5 weight percent vinyl aromatic hydrocarbons;
- (b) less than 1 weight percent butadiene;
- (c) about 10-90 weight percent piperylene stream; and
- (d) about 90-10 weight percent monoolefin chain transfer agent stream.
- 2. The resin of claim 1 wherein said monoolefin chain transfer agent is of the formula RR'.dbd.CR"R"' where R and R' are C.sub.1 -C.sub.5 alkyl and R" and R"' are H or a C.sub.1 -C.sub.4 alkyl.
- 3. The resin of claim 1 wherein said chain transfer agent comprises the reaction product stream of medium chain length olefins derived from the selective dimerization of propylene.
- 4. The resin of claim 3 wherein the propylene is dimerized in the presence of a transition metal catalyst.
- 5. The resin of claim 3 wherein said dimerization reaction product stream contains from about 12-18 weight percent C.sub.9 propylene trimer.
- 6. The resin of claim 3 wherein the dimerization reaction product chain transfer agent has the following analysis on a C.sub.9 trimer-free basis:
- ______________________________________Component Range Weight %______________________________________4-Methyl-1-pentene 0.5-22,3-Dimethyl-1-butene 1-4cis-4-methyl-2-pentene 2.5-5trans-4-Methyl-2-pentene 15-302-Methyl-1-pentene 4-6trans-3-Hexene 4-72-Methyl-2-pentene 12-18cis-2-Hexene 25-402,3-Dimethyl-2-butene 3-7______________________________________
- 7. The resin of claim 1 wherein chain transfer agent is present in said hydrocarbon feed at about 10-50 weight percent based on the weight of said hydrocarbon feed.
- 8. The resin of claim 1 wherein said piperylene stream is a heat soaked piperylene concentrate.
- 9. The resin of claim 8 wherein said heat soaked piperylene concentrate contains about 20-70 weight percent piperylene based on the weight of said concentrate.
- 10. The resin of claim 1 wherein said hydrocarbon feed contains less than 1 weight percent vinyl aromatic hydrocarbons.
Parent Case Info
This is a continuation of application Ser. No. 096,087, filed 9/14/87 now abandoned which is a continuation-in-part of U.S. patent application Ser. No. 936,409 filed Dec. 1, 1986.
US Referenced Citations (4)
Continuations (1)
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Number |
Date |
Country |
Parent |
96087 |
Sep 1987 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
936409 |
Dec 1986 |
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