Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1998-01-07
2000-10-17
Teskin, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526172, 526283, 526290, 526308, 526335, 526336, 526346, 5263471, 5263484, 5263486, 5263487, C08F 422, C08F 1212
Patent
active
061333867
ABSTRACT:
Metal oxide solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer (e.g., styrene based monomers), C5 monomers, and C9 monomers to produce hydrocarbon resins. Freely-associated water may be removed from the solid acid catalyst prior to use. Resins with softening points (Ring and Ball) in the range of about 5.degree. C. to 170.degree. C. can be prepared. These catalysts offer advantages over the traditional Friedel-Crafts polymerization catalysts since the acid sites are an integral part of the solid. The solid acid catalysts are relatively nonhazardous, reusable catalysts which eliminate or at least reduce contamination of the resulting resin products with acid residues or by-products.
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Babcock Laura M.
Morrell Dennis G.
Hercules Incorporated
Teskin Fred
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