Non-sticky, elastic multifilament polyurethane thread mfr. - by melt-spinning mixt. of thermoplastic polyurethane of specified compsn. and tri:cresyl phosphate or other specified plasticiser

    公开(公告)号:DE3911725A1

    公开(公告)日:1990-10-18

    申请号:DE3911725

    申请日:1989-04-11

    Applicant: BASF AG

    Abstract: Non-sticky, highly elastic, multifil polyurethane elastomer thread (I) is produced by the melt-spinning process, using a plasticiser-contg. thermoplastic PU material (II) consisting of (A) 99-50 pts. wt. thermoplastic PU with Shore A hardness 95-80, main melting peak (hard segments) at 210-220 deg.C (by DSC) and MFI 0.1-200 (190 deg.C./212 N) and (B) 1-50 pts. wt. di(methoxyethyl) phthalate, tricresyl phosphate and/or diphenylcresyl phosphate as plasticiser; (A) is obtd. by reaction of (a) organic di-isocyanates with (b) mainly difunctional polyhydroxy cpds. with mol. wt. 500-8000 and (c) chain extenders with mol. wt. 60-400 in the presence of (d) catalysts and (e) opt. auxiliary substances and/or additives. (I) is claimed as such, with elongation at break above 300% (DIN 53815) and strain ratio above 0.85. Pref. Shore A hardness is 60-80; (a) is 4,4'-diphenylmethanedi-isocyanate (MDI) or 1,5-naphthylenedi-isocyanate, (b) are linear polyester-ols obtd. from adipic acid and 2-6C alkanediols, polycaprolactones and/or polytetramethylene-ether glycols and (c) is 1,4-butanediol. USE/ADVANTAGE - (I) is useful for the prodn. of textile fibres or plane textile structures (claimed). Applications are in the textile industry (outer clothing, corsetry, etc.), bandages, reinforcing fibres for plastics, etc. The process enables the prodn. of highly-elastic multifilament PU thread which is non-sticky.

Patent Agency Ranking