| 摘要 |
#CMT# #/CMT# Elastomeric polyurethane molded parts, obtained by reacting: polyol formulation (A) consisting of (a) polyol component, (b) chain extenders and/or crosslinker, (c) optionally propellant, (d) catalyst mixture consisting of a bicyclic amine catalyst (I) and further amine catalyst, (e) optionally organic bismuth carboxylate, (f) optionally organic tin catalyst, (g) optionally auxiliary agent and additive; and isocyanate component (B1) consisting of (h) prepolymer, is claimed. #CMT# : #/CMT# Elastomeric polyurethane molded parts, obtained by reacting: a polyol formulation (A) consisting of (a) polyol component made from (a1) at least a polyether polyol with hydroxyl number of 20-112 and a functionality of 2, which is obtained by alkoxylation with propylene oxide and/or ethylene oxide with predominantly primary hydroxyl-terminal group, and (a2) optionally at least a polyether polyol with hydroxyl number of 20-112 and a functionality of greater than 2-3.5, which is obtained by alkoxylation of propylene oxide and/or ethylene oxide with predominantly primary hydroxyl-terminal group, where the component (a) optionally contains an organic filler, which are obtained by grafting with styrene/acrylonitrile or by addition of diamine and disocyanate, (b) chain extenders and/or crosslinker with molecular weight of 60-499, (c) optionally a propellant, (d) a catalyst mixture consisting of at least a bicyclic amine catalyst of formula (I) and at least a further amine catalyst, (e) optionally an organic bismuth carboxylate, (f) optionally an organic tin catalyst, (g) optionally an auxiliary agent and additive; and an isocyanate component (B1) consisting of (h) a prepolymer with an isocyanate content of 10-32 wt.% made from (h1) 4,4'-diphenylmethane diisocyanate and/or through carbodiimidization modified 4,4'-diphenylmethane-diisocyanate, (h2) one or more polyether polyol with a hydroxyl number of 10-112, and/or (h3) polyethylene glycol and/or polypropylene glycol with molecular weight of 135-700 g/mole, where the equivalence ratio of the isocyanate group of (B1) to the sum of the counter isocyanate group reactive hydrogen of the components (a)-(g) is 0.8:1-1.2:1, preferably 0.98:1-1.05:1, is claimed. R : CH 3, C 2H 5, n-propyl, iso-propyl, n-butyl, allyl, 2-hydroxyethyl, 3-methoxypropyl, 2-ethylhexyl, 2-hydroxyethoxyethyl, cyclohexyl, benzyl, 3-dimethylaminopropyl, 2-acetoxyethoxyehtyl or 2-dimethylaminoethoxyethyl. #CMT#[Image]#/CMT# #CMT#USE : #/CMT# The elastomeric polyurethane molded parts are useful as technical articles or commodity, such as shoe sole or shoe fittings with a density of 100-1100 kg/m 3>(claimed). #CMT#ADVANTAGE : #/CMT# The elastomeric polyurethane molded parts exhibit: improved gas yield and improved reaction behavior; good processing characteristics; long flow times; shorter demolding time; and good mechanical values (good bending fatigue properties and high mechanical strength). #CMT#POLYMERS : #/CMT# Preferred Components: The amount of (d) is 0.001-10, preferably 0.01-4 wt.%, relative to the total quantity of (a), (b), (c), (e), (f), and (g). #CMT#EXAMPLE : #/CMT# Polyether polyol (with the hydroxyl number of 28, 70% propylene oxide, 30% ethylene oxide, predominantly primary hydroxyl groups and propylene glycol) (1276.59 parts by weight), butane diol-1,4 (188.36 parts by weight), ethane diol (17.12 parts by weight), DC198(RTM: Silicone foam stabilizer) (6.85 parts by weight), water (6.85 parts by weight), bismuth-2-ethylhexanoate (2.57 parts by weight), 1,4-diazabicyclooctane in 1,4-butane diol (13.70 parts by weight), tris-(3-dimethylamino)-propylamine (6.85 parts by weight), bis-(dimethyl-aminopropyl)-methylamine (10.27 parts by weight), 2-methyl-2-azanorbornane (3.42 parts by weight), and a prepolymer (prepared by reacting 4,4-diisocyanatodiphenylmethane (66 parts by weight) (MDI), modified MDI (5 parts by weight) having an isocyanate content of 30%, produced by partial carbodiimidization, and polyether mixture (comprising tripropylene glycol and propylene oxide-polyether with number average molecular weight of 173 g/mole) (29 parts by weight) with an isocyanate content of 19.8%) (1287.61) were mixed at 30[deg] C, and the mixture was heated at 50[deg] C for 4 minutes to give corresponding elastomeric polyurethane molded parts. |
