| 摘要 |
Dialkyl sulfosuccinates, preferably with 4-18C alkyl groups, are used as antistatic additives in polyurethane (PUR) compositions and elastic PUR spun fibers, either as additives in the spinning melt/solution or as a surface treatment on the spun fiber. A PUR composition with improved antistatic properties comprises: (A) 99.98-65 (preferably 99.95-80, most preferably 99.9-85) wt% PUR; (B) 0.02-15 (preferably 0.05-5, most preferably 0.1-3) wt% dialkyl sulfosuccinate of formula (I); and (C) 0-20 (preferably 0-15) wt% additives. R1, R2 = H or 1-30 C alkyl, preferably 4-18 C alkyl; M = H, lithium, sodium, potassium or ammonium. Independent claims are also included for: (a) antistatic compositions containing at least (D) compound (I) in amounts as above and (E) 85-99.98 (most preferably 97-99.9) wt% polyalkylsiloxane and/or alkoxylated polyalkylsiloxane, especially polydimethylsiloxane (PDMS) and/or ethoxylated PDMS, with a viscosity of 2-100 (most preferably 2.5-30) mPa.s and/or mineral oil with a viscosity of 2-2500 (most preferably 3-1500) mPa.s (at 25 degrees C); (b) antistatic PUR fibers based on thermoplastic PUR or a polymer with at least 85 wt% segmented PUR, containing compound (I) in the above amounts, especially finely dispersed inside the fibers and/or on the surface; (c) a melt-spinning process for the production of antistatic PUR fibers comprising making a PUR melt, adding compound (I) as above, spinning the melt, forming a filament by cooling, optionally stretching, and then preparing and winding up; (d) dry-spinning or wet-spinning processes in which (I) is added to the PUR solution before spinning followed by drying or precipitation to remove solvent; (e) processes in which the spun, consolidated fiber obtained from the above processes is treated with a preparation solution containing (I) in the above amounts. |
