A process for the manufacture of an acylated polymer composition including amylose and/or amylopectin, including a pre-treatment step in the presence of an acid and a hydroxycarboxylic acid, subsequent acylation and, preferably, a post-treatment step with an acid. The products obtained are useful as additives in inks, varnishes, lacquers, coatings, thickeners, adhesives or binders.

A process for the manufacture of an acylated polymer composition including amylose and/or amylopectin, including a pre-treatment step in the presence of an acid and a hydroxycarboxylic acid, subsequent acylation and, preferably, a post-treatment step with an acid. The products obtained are useful as additives in inks, varnishes, lacquers, coatings, thickeners, adhesives or binders.

The invention concerns a process for the manufacture of an acylated polymer composition comprising amylose and/or amylopectin, comprising a pre-treatment step in the presence of an acid and a hydroxycarboxylic acid, subsequent acylation and, preferably, a post-treatment step with an acid. The products obtained are useful as additives in inks, varnishes, lacquers, coatings, thickeners, adhesives or binders.

The invention concerns a process for the manufacture of an acylated polymer composition comprising amylose and/or amylopectin, comprising a pre-treatment step in the presence of an acid and a hydroxycarboxylic acid, subsequent acylation and, preferably, a post-treatment step with an acid. The products obtained are useful as additives in inks, varnishes, lacquers, coatings, thickeners, adhesives or binders.

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%.

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%.

The present invention provides a preparation method of an oxidized anticoagulant starch adhesive, comprising the following steps: (1) an original starch and deionized water are mixed to form a starch emulsion, then the pH is adjusted to perform an oxidation reaction; a reductant is added to react with the unreacted oxidant, after the reaction is completed, an esterifying agent is added to perform an esterification reaction after adjusting pH; then a product is neutralized, washed, filtered and dried to obtain starch granules; and (2) a 40-50% starch emulsion is formulated by using the starch granules obtained in the step (1), the pH is adjusted to 6.5-7.5 after gelatinization, and dispersing agent, defoamer and water are added to form a starch adhesive. The esterifying agent used is composed of an anion and a cation, which significantly improves anticoagulant effect of the starch adhesive.

The present invention provides a preparation method of an oxidized anticoagulant starch adhesive, comprising the following steps: (1) an original starch and deionized water are mixed to form a starch emulsion, then the pH is adjusted to perform an oxidation reaction; a reductant is added to react with the unreacted oxidant, after the reaction is completed, an esterifying agent is added to perform an esterification reaction after adjusting pH; then a product is neutralized, washed, filtered and dried to obtain starch granules; and (2) a 40-50% starch emulsion is formulated by using the starch granules obtained in the step (1), the pH is adjusted to 6.5-7.5 after gelatinization, and dispersing agent, defoamer and water are added to form a starch adhesive. The esterifying agent used is composed of an anion and a cation, which significantly improves anticoagulant effect of the starch adhesive.

A carpet material with at least one of its components made easier for recycle by use of an adhesive which can be selectively altered to change the adhesion strength to allow component carpet layers to be separated.

A carpet material with at least one of its components made easier for recycle by use of an adhesive which can be selectively altered to change the adhesion strength to allow component carpet layers to be separated.