POLYMER COMPOSITION THAT CAN BE EXTRUDED INTO AN OBJECT THAT IS PERMEABLE TO WATER VAPOUR

• Main Authors: PINEAU QUENTIN, BRIFFAUD THIERRY, BERDIN LAURE, LOYEN KARINE
• Format: Patent
• Language: Chinese; English
• Published: 05.07.2019
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present invention concerns an extrudable polymer composition comprising: 99.5 to 99.95% of at least one copolymer with flexible blocks and rigid blocks, comprising: -at least 25% by weight of flexible polyethylene glycol (PEG) blocks with a functionality equal to 2, relative to the total weight of copolymer, 0.05 to 0.5% by weight of at least one polyol comprising at least three hydroxyl groups, relative to the total weight of the composition, characterised in that: the weight average molar mass of said copolymer is at least equal to 100,000 g/mol; and the weight average molar mass of thepolyol is at most 1000 g/mol; and said at least one polyol linking rigid blocks of the copolymer together by means of ester bonds. The present invention concerns, in particular, the use of said composition in methods of extrusion for manufacturing objects permeable to water vapour. 本发明涉及一种可挤出的聚合物组合物，其包含：99.5至99.95％的至少一种具有柔性嵌段和刚性嵌段的共聚物，其包含：-至少25重量％的官能度等于2的柔性聚乙二醇(PEG)嵌段，相对于共聚物的总重量计；0.05至0.5重量％的包含至少三个羟基的至少一种多元醇，相对于组合物的总重量计，其