Use of a binder based on biopolymers in roadside and cilvil engineering applications

摘要

Use of a binder comprising at least a resin based on polymerized hydroxyacid derivatives, as a non-bituminuous binder in coating, marking products and sealing products, is claimed, where the resin is e.g. (a) organic resins derived from oil or grease of natural origin comprising monoglycerides and/or diglycerides, esterified by a polyhydroxy acid compound (A). Use of a binder comprising at least a resin based on polymerized hydroxyacid derivatives, as a non-bituminuous binder in coating, marking products and sealing products, is claimed, where the resin is: (a) organic resins derived from oil or grease of natural origin comprising monoglycerides and/or diglycerides, esterified by a polyhydroxy acid compound of formula (H 2C(O-COR 1)-CH(O-R 2)-CH 2(O-(hydroxy-acid) n-C=O-X-OH)) (A); (b) organic resins corresponding to esters of polylactic acid and polyol such as glycerol, 1,2 and 1,3-propanediol and/or mono or polyhydroxylated polyacid such as malic acid, citric acid, tartaric acid or their esters, preferably glycerol or citric acid; and/or (c) organic resins based on polylactic acid or its derivative such as corresponding esters. R 16-32C aliphatic hydrocarbon chain optionally substituted by alkyl or hydroxyl groups; R 2H or -COR 4; R 4R 1or polyhydroxy acid ester; X : -CH 2or -CHR; R : 1-5C alkyl and comprising 0-5 hydroxyl functions; and n (number of hydroxy acid units) : 3-2000. Where the poly(hydroxy acid) group corresponding to [hydroxy acid] n-CO-X-OH is a linear or branched chain, obtained by condensation of hydroxy acid monomers. Independent claims are included for: (1) a material for producing layer and/or construction coating, comprising an aggregate and the binder; (2) a layer or construction coating obtained in situ by applying a mixture of binder and aggregate on pavement or by spreading on the pavement of the binder before or after spreading the aggregate; (3) a road marking product comprising the binder (10-50%), pigments (1-40%) and fillers (20-60%); and (4) a sealing product such as a membrane and/or geomembrane comprising a fabric impregnated with a binder medium comprising the binder and limestone type filler.