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. 08, 1977
Filed:
Jul. 22, 1976
Applicant:
Inventor:
David Lee Ruff, Torrance, CA (US);
Assignee:
Grefco Inc., Bala Cynwyd, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; C08L / ;
U.S. Cl.
CPC ...
260-9 ; 260 / ; 260 / ; 260 / ; 260D / ; 264D / ;
Abstract
Shaped articles for construction and insulation which are water repellent are prepared by dry blending expanded perlite particles and fibers, applying to the resulting mixture a solution of a reactive synthetic organic binder in a low boiling organic solvent. The binder is capable of being cured at ambient temperatures and of reacting with hydroxyl groups present in the perlite and fibers to provide the articles with water repellent properties. The mixture containing binder is formed into the desired shape, e.g. panels, solvent is removed and the binder is cured at substantially ambient or slightly higher temperatures.