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:
Jun. 21, 1988
Filed:
Jan. 09, 1987
Daniel R Sassano, Monroeville, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
Disclosed is a method of making a non-aqueous solventless polyester varnish. A composition is prepared which comprises about one mole of maleic anhydride, about 0.25 to about 0.35 mole of dicyclopentadience, about 0.65 to about 0.75 mole of ethylene glycol, and about 0.35 to about 0.45 mole of a polyol. The composition is heated to about 150.degree. to about 170.degree. C., and then to about 200.degree. to about 210.degree. C., which condenses out water, forms an unsaturated polyester and, reduces the acid number to less than about 45. The composition is cooled to a temperature below about 150.degree. C., and about 0.1 to about 0.5% of an inhibitor is added to said composition, followed by an unsaturated aromatic compound which can be styrene, vinyl toluene, or mixtures thereof, in a ratio of about 20 to about 40 pbw unsaturated aromatic compound to about 60 to about 80 pbw unsaturated polyester. When it is desirable to use the composition, 0.5 to about 1.5 percent by weight of a catalyst is added to the composition. The composition is applied to a rotating apparatus and is cured at about 150.degree. to about 160.degree. C. for about 45 to about 60 minutes.