The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1998
Filed:
Nov. 22, 1996
Jerry L Haluska, Baton Rouge, LA (US);
Richard B Pannell, Kingwood, TX (US);
Exxon Chemical Patents, Inc., Houston, TX (US);
Abstract
The invention relates to catalytic hydrogenation processes for hydrocarbon molecules of number-average molecular weight greater than about 180, and to use therein of an inert catalyst support comprising porous refractory substrate particles having: a) a pore volume distribution wherein i) pores having diameters >150,000 .ANG. constitute greater than about 2% of the total volume, ii) pores having diameters >20,000 .ANG. and <150,000 .ANG. constitute greater than about 1% of the total volume, iii) pores having diameters >2,000 .ANG. and <20,000 .ANG. constitute greater than about 12% of the total volume; and, b) a total pore volume of from about 45% to 86% of the total volume of the substrate particles. Using the invention increased resin productivity of 150% or more can be achieved in industrial operations. Hydrocarbon resins prepared from catalytically or thermally polymerized feedstreams and hydrogenated using the inert support having the described pore size distribution exhibit color and softening point characteristics at least equivalent to previously available resins. Also, increased aromaticity of aliphatic-aromatic resins prepared according to the process is possible leading to particular suitability as tackifers for styrene block copolymers, ethylene-vinyl ester copolymer and acrylic copolymer adhesive compositions.