HOT-MELT ADHESIVE COMPOSITION FOR NON-WOVEN MATERIAL Russian patent published in 2011 - IPC C08F297/04 C09J153/02 A61L15/12 

FIELD: chemistry.

SUBSTANCE: invention relates to compositions of hot-melt adhesive for non-woven materials and block-copolymers used therein. The invention discloses a hot-melt adhesive composition for use in non-woven articles, containing: (a) 100 pts. wt block-copolymer of formula [S-(I/B)]_n-X, where S is mainly a polystyrene block, and (I/B) is a polymer block obtained through arbitrary copolymerisation of a mixture of mainly isoprene and butadiene in weight ratio between 70:30 and 30:70, n is an integer between 3 and 5, and X is a residue to an alkoxy silane binding agent, where the block-copolymer has melt flow index measured at 200°C/5 kg between 0.1 and 12 g/10 min, content of polystyrene between 28 and 50 wt %, binding efficiency between 50 and 100%, (b) 250-300 pts. wt resin which increases adhesiveness, (c) 50-150 pts. wt plasticiser and (d) 0-3 pts. wt stabiliser and/or antioxidant. The invention also discloses a block-copolymer for preparing said composition.

EFFECT: composition has high cohesion and higher spraying capacity, which improves the technology of manufacturing non-woven articles.

18 cl, 5 tbl