Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 15, 2008
Patent Application Number
11430620
Date Filed
May 9, 2006
Patent Primary Examiner
Patent abstract
Lost foam pattern assemblies formed by gluing together a plurality of EPS foam pattern segments with a polystyrene-like glue comprising an aromatic resin that has a molecular weight less than 10,000 and thermally degrades at temperatures no greater than said EPS. The glue contains sufficient first plasticizer, miscible with the resin, to impart a viscosity of about 0.1 to 5 PaS @ about 100-135° C. to the glue. The glue may optionally include a second, limited-miscibility, plasticizer to accelerate the hardening rate and increase the ultimate rigidity of the glue.
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