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:
Mar. 23, 1976
Filed:
Oct. 02, 1973
Tsuneo Tsubakimoto, Toyonaka, JA;
Iwao Fuzikawa, Toyonaka, JA;
Nippon Shokubai Kazaku Kogyo Co. Ltd., Osaka, JA;
Abstract
A process for preparing a suspension of a finely divided hardened resin which comprises, in combination, the steps of reacting in an aqueous medium at a pH of 5-10 a member selected from the group consisting of benzoguanamine and a mixture of 100-50% by weight of benzoguanamine and 0-50% by weight of melamine with formaldehyde in a ratio of 1 mole of the former to 1.2-3.5 moles of the latter to prepare an aqueous liquid of a soluble and fusible resin having a degree of modified water tolerance of 0-150%, introducing this aqueous liquid to an aqueous solution of protective colloid with stirring to prepare an emulsion of a soluble and fusible resin, adding a curing catalyst to said emulsion, followed by holding same for at least one hour at a temperature in the range of 40.degree.-60.degree.C., and thereafter heating the emulsion at a temperature in the range of 60.degree.-200.degree.C. under normal atmospheric or superatmospheric pressure to effect the hardening of the resin.