Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Adhesive outermost layer
Patent
1997-03-03
2000-08-22
Dawson, Robert
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Adhesive outermost layer
524526, 525 99, C09J 702, C09J10906
Patent
active
061069396
ABSTRACT:
The invention provides a petroleum-based aliphatic resin having: a) a Ring and Ball (R&B) softening point in the range of about 75 to about 110.degree. C., b) a weight average molecular weight (Mw) of about 1000 to about 2600 Dalton, a z-average molecular weight (Mz) from about 1900 to about 5000 Dalton and an Mw/Mn below about 2.0, c) a level of aromatic protons below about 1.5% with respect to the total protons determined by .sup.1 H-NMR, and d) a mixed methylcyclohexane aniline cloud point (MMAP) of about 90.degree. C. or less. The resins according to the invention are characterized by a high amount of cyclic structures. Further disclosed is a method of independently controlling the R&B softening point and the molecular weight of an aliphatic resin composition during its preparation by polymerization of a petroleum-based feed, the method being characterized in that the amount of cyclic structures in the resins is increased.
REFERENCES:
patent: 3951928 (1976-04-01), Leckie
patent: 4680333 (1987-07-01), Davis
Donker Christiaan Pieter
Lenselink Berend
Theelen Michael Hendrikus
Aylward D.
Dawson Robert
Hercules Incorporated
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