摘要:
Disclosed is an elastic polyurethane yarn which can exhibit excellent heat resistance even when an unsaturated fatty acid or a heavy metal is attached to the yarn during dyeing at a high temperature, and which has high elastic recovery and high strenth/elongation. Specifically disclosed is an elastic yarn comprising a polyurethane mainly composed of a polymer diol and a diisocyanate, which contains (a) a hindered phenol compound, (b) an N,N-dialkylsemicarbazide compound and (c) a nitrogenated aromatic compound, wherein the nitrogenated aromatic compound (c) is contained in an amount of 0.01 to 0.30 weight % inclusive.
摘要:
PROBLEM TO BE SOLVED: To provide a production method for a natural rubber having lowered viscosity or lowered stable-viscosity, which has excellent dynamic properties, low viscosity or low stable-viscosity, and excellent processability; to provide a natural rubber obtained thereby; and to provide a rubber composition containing the natural rubber. SOLUTION: The production method for the natural rubber having lowered viscosity or lowered stable-viscosity, is carried out by the followings. A natural rubber latex is decreased in the metal content by the treatment of adding a water-soluble ammonium salt thereto, and after optionally adding a viscosity stabilizer to the treated natural rubber latex, the latex is subjected to pulse drying by spraying it to a pulse wave atmosphere, yielding a solid rubber. The natural rubber obtained thereby and the rubber composition containing the natural rubber are also provided. COPYRIGHT: (C)2007,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a fiberboard for capturing and decomposing aldehydes capable of effectively capturing and decomposing both of formaldehyde and acetoaldehyde. SOLUTION: The fiberboard 20 for capturing and decomposing aldehydes comprises a wooden fiberboard 1 containing at least 30 mass% of vegetable fibers, and an aldehyde capturing agent at least containing a carbodihydrazide 2 infiltrating to be solidified inside both the side surfaces of the fiberboard 1. The aldehyde capturing agent may be infiltrated and solidified only inside a side surface of the wooden fiberboard 1. Also, a mixed board of resin fibers and vegetable fibers other than the wooden fiberboard can be used. The carbodihydrazide is applied by spraying or the like for coating the wooden fiberboard or the like together with a surfactant in the state of a water solution. COPYRIGHT: (C)2008,JPO&INPIT