Clutch cable, for use in drive line of vehicle, e.g. car, is based on polyamide 12 blended with syndiotactic monovinyl aromatic (co)polymer, syndiotactic polystyrene graft copolymer and inorganic filler

摘要

Clutch cable has absorption change between 100[deg]C and room temperature at 30 bar corresponding to declutching travel loss not 0.5 mm and comprises composition (heat resistance over 140[deg]C; water absorption under 1.4% at 23[deg]C) containing 100 parts weight polyamide 12 (PA 12) and (wt.% with respect to PA 12) 0.1-50% syndiotactic monovinylaromatic (co)polymer, 0.1-50% syndiotactic polystyrene graft copolymer and 0.1-30% specified inorganic filler(s). Clutch cable has difference of volumetric absorption between 30 bar/100[deg]C and 30 bar/room temperature less than 150 mm3/m length up to total length of 1500 mm, corresponding to a declutching travel loss not 0.5 mm, and comprises a polyamide composition with temperature resistance to ISO 306 (Vicat B50) over 140[deg]C and water absorption to ISO 62 less than 1.4% at 23[deg]C. This contains, at least, (A) 100 parts weight (pw) polyamide 12 with melt index under 100 g/10 minutes at 275[deg]C/5 kg and, in wt.% with respect to (A), (B) 0.1-50% syndiotactic monovinylaromatic homo- or copolymer, (C) 0.1-50% syndiotactic polystyrene graft copolymer with MAH content over 1 and (D) 0.1-30% inorganic filler(s) selected from magnesium hydroxide, calcium carbonate, talc, wollastonite, silica or silicates with ionic layer charges, modified by cation or anion exchange, preferably suspended in oil or grease components.