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:
Feb. 09, 1982
Filed:
Mar. 12, 1980
Frank J Washabaugh, Titusville, NJ (US);
William C Goble, Old Bridge, NJ (US);
Engelhard Minerals & Chemicals Corporation, Edison, NJ (US);
Abstract
Liquid unsaturated polyester resins may be thickened and made thixotropic by addition of a colloidal, gelling grade clay such as attapulgite and a quaternary ammonium surfactant under moderate shear. This thixotropic polyester composition is formed without making provision for first chemically reacting clay and surfactant. For enhanced long-term stability a tertiary amine surfactant having an alkyl group and two polyoxyethylene groups attached to the nitrogen may be added to the above composition. For polyester resins having a styrene monomer content greater than 35%, the clay and surfactant are mixed with styrene first, to form a pregel, prior to addition of the polyester resin to be thickened.