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:
Dec. 22, 1981
Filed:
Nov. 23, 1979
James W Adams, Schofield, WI (US);
Michael W Schoenherr, Wausau, WI (US);
American Can Company, Greenwich, CT (US);
Abstract
Lignin concentrate solutions with at least about 40% total solids, having viscosities not higher than 10,000 cps. at 25.degree. C. and comprising normally water-insoluble and phenol-insoluble Kraft lignin dissolved in solvents comprising phenol and water or phenol-water-sodium hydroxide or ammonia are provided. The concentrates contain lignin to phenol weight ratios of less than 70:30 and more than 40:60 and preferably 50:50, and optionally, 2 to 20%, based on the weight of lignin, of sodium hydroxide or ammonia. The concentrates are storable and suitable for shipment and may be employed as phenol extenders in applications normally using phenols. They are particularly tailored for use in replacement of 25% to 100% of the phenol component in the production of phenol/formaldehyde resins and, when so employed, provide phenol-lignin-formaldehyde (PLF) resins that are useful in the formulation of plywood adhesives.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile