SUBSTRATES COATED OR BONDED WITH A COMPOSITION COMPRISING A POLYURETHANE

• Main Author: SCHAEKENS, CHRIS FRANCOIS HUBERT
• Format: Patent
• Language: English; French
• Published: 23.06.2016
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

A coated substrate having on one surface thereof a coating composition comprising a polyurethane, said polyurethane comprising the reaction product of: i) at least one isocyanate; and, ii) a polyol which is a random copolymer comprising from 30 to 85 wt.% lactoyl units and at least one further monomer, wherein said lactoyl units of said polyol are derived from optically pure lactic acid or optically pure lactide, preferably from L-lactic acid or L-lactide. The polyol may be further characterized by a number average molecular weight (Mn) of from 800 to 5000, preferably from 800 to 3500 g/mol. Un substrat revêtu présente sur l'une de ses surfaces une composition de revêtement comprenant un polyuréthane, ledit polyuréthane comprenant le produit de réaction de :i) au moins un isocyanate; et ii) un polyol qui est un copolymère aléatoire comprenant de 30 à 85 % en poids d'unités de lactoyl et au moins un autre monomère, lesdites unités de lactoyl dudit polyol étant dérivées d'acide lactique optiquement pur ou de lactide optiquement pur, de préférence de l'acide L-lactique ou de L-lactide. Le polyol peut être caractérisé en outre par un poids moléculaire moyen en nombre (Mn) compris entre 800 et 5000, de préférence entre 800 et 3500 g/mol.