Process for producing bio-based-cyclic anhydride monoester wood adhesives from bio-based powdered raw materials

Abstract

A method for producing a seed powder-polycarboxylic acid monoester wood adhesive using a bio-based feedstock includes: generating a functionalized powder feedstock by moderate degradation of the powder feedstock with appropriate water content in the existence of a multifunctional catalyst and simultaneous esterification with a cyclic anhydride to introduce a curable functional group; and mixing the separated functionalized powder with water and adding a curing additive to form a thermo-curable wood adhesive. Double-layer plywood samples were prepared according to ASTM International Standard 2017, D2339-98 and solidified for 3-10 min under 3 MPa pressure in a hot press at temperatures between 150-200° C. The double-layer plywood samples showed dry and wet strengths of up to 3.5 MPa and a wood failure rate of more than 80%.

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