US Patent Issued to Southwest Forestry University on Oct. 21 for "Method of preparing environmentally-friendly water-resistant tannin-based wood adhesive" (Chinese Inventor)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,554, issued on Oct. 21, was assigned to Southwest Forestry University (Kunming, China).

"Method of preparing environmentally-friendly water-resistant tannin-based wood adhesive" was invented by Xiaojian Zhou (Yunnan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An environmentally-friendly epoxy tannin resin based polyurea adhesive and its preparation method are provided. The method includes preparing the environmentally-friendly water-resistant tannin-based wood adhesive by graft copolymerization of epoxy tannin, which is obtained by epoxidation of tannin using epoxy chloropropane, with triethylene tetramine and subsequent deamination reacti...