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:
Jan. 17, 1978
Filed:
Jan. 21, 1977
William Percy Moore, Hopewell, VA (US);
Waverly Chemical Co., Hopewell, VA (US);
Abstract
Method of producing a dimensionally stabilized urea-formaldehyde foam which comprises preparing a neutral concentrated partially cured aqueous urea-formaldehyde resin, combining said neutral resin with a froth produced by forcing air through a dilute acidic aqueous surfactant solution to activate the urea-formaldehyde foam cure, immediately thereafter combining the curing urea-formaldehyde foam with a substantially non-ionic liquid additive containing dissolved urea and suspended linearly shaped refractory solid particles, completing the acid catalyzed foam cure, and drying. Foam dimensional stability is maximized when the non-ionic liquid additive contains 10-20% by weight dissolved urea and 10-20% by weight suspended attapulgite clay.