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. 30, 1981
Filed:
Feb. 11, 1980
Joseph G Robinson, Winchcombe, GB;
Sally A Brain, Tewkesbury, GB;
Coal Industry (Patents) Limited, London, GB;
Abstract
This invention relates to a method of producing a phenolated resin which can be used to form heat stable (up to 250.degree.) products. Previously used resins are either very expensive or do not provide the requisite high temperature properties. An aim of the invention is to provide a cheap equivalent to commercially available high temperature resins. An aromatic hydrocarbon (e.g. toluene) formaldehyde condensation resin is prepared. The low molecular weight contaminants are removed by a distillation process. The residue contains less than 1% low molecular weight material, and is phenolated to give the final resin. The resin may be cured to give a heat stable product. The phenolated resin may be used to form glasscloth and asbestos laminates or as a lamp capping cement.