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. 11, 1996
Filed:
Jun. 23, 1994
Yamaha Corporation, , JP;
Abstract
A acetylating agent vapor is brought into contact with a material containing cellulose while continuously moving the acetylating agent, and thereby, the material containing cellulose is acetylated in a vapor phase. Solvents for dilution, catalysts, and an immersion process in an acetylating agent (liquid) are not necessary, and thereby, it is not merely the case that the process is simplified, but the acetylation period is shortened as a result of the increase in reaction efficiency, and the accumulation of excess heat of reaction in the material containing cellulose during the reaction is prevented, and thereby, the uniformity of acetylation is improved. Furthermore, in the present invention, wooden strips acetylated by this method are accumulated and modified wood is manufactured. This modified wood has superior resistance to moisture, possesses no acetic acid odor, and does not cause rusting.