Fast Synthesis of N-Acylhydrazones Employing a Microwave Assisted Neat Protocol
摘要:
A variety of N-acylhydrazones were synthesized Under microwave irradiation within 2.5-10 min, starting from benzo, salicyloyl, and isonicotinic hydrazides. The protocol developed employs microwave irradiation in the absence of solvents and catalysts, leading to high yields. The results are reproducible in a 500 mg to 5 g scale.
A rubber composition prepared by compounding 0.05 to 20 parts by weight of at least one selected from substituted hydrazide compounds represented by the following Formulas (I) to (IV) per 100 parts by weight of a rubber component comprising at least one rubber selected from the group consisting of natural rubber and synthetic rubber, and a pneumatic tire using the same:
wherein A represents one selected from the group consisting of an aromatic group which may have a substituent, a hydantoin ring which may have a substituent, and a saturated or unsaturated linear hydrocarbon having 1 to 18 carbon atoms; Y represents hydrogen, an amino group, an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group, an alkenyl group, an aromatic group, a pyridyl group or hydrazino group; and R1 to R11 each represent hydrogen, an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group or an aromatic group.
Rubber composition and heavy duty pneumetic tire using the rubber composition
申请人:Bridgestone Corporation
公开号:EP1184412A1
公开(公告)日:2002-03-06
A rubber composition obtained by compounding (A) a rubber component comprising 15 to 55% by weight of (i) a modified styrene-butadiene copolymer rubber which is obtained by solution polymerization and has a tin atom introduced into its molecular chain, 45 to 85% by weight of (ii) at least one rubber selected from natural rubber and synthetic isoprene rubbers, and (B) a hydrazide compound.
The rubber composition exhibits improved abrasion resistance, heat resistance and low heat generating property and is advantageously used for tread rubber of heavy duty pneumatic tires.
Polymaleimide-containing rubber composition and tire
申请人:BRIDGESTONE CORPORATION
公开号:EP1199331A1
公开(公告)日:2002-04-24
A rubber composition comprises at least one rubber ingredient selected from natural rubber and synthetic rubbers, and a polymaleimide synthesized by reacting at least one of anhydrous maleic acid and anhydrous citraconic acid with methylene polyaniline.
A hydrazone derivative represented by Formula (V):
ZC(=O)NHN=C(CH3) (CH2CH(CH3)2) (V)
wherein Z represents 3-hydroxy-2-naphthyl, 1-hydroxy-2-naphthyl, 2-hydroxyphenyl or 2,6-dihydroxyphenyl group.
The present invention relates to a tire characterized by using as a member, a rubber composition comprising (a) a rubber component comprising at least one selected from a natural rubber and a diene base synthetic rubber, (b) silica having a nitrogen-absorbing specific surface area (N2SA) of 180 to 270 m2/g and 0.1 to 10.0 mass parts of (c) a partial ester compound of maleic anhydride and a (poly)oxypropylene derivative per 100 mass parts of the rubber component described above. Further, the present invention relates to a tire characterized by using as a tread rubber, a rubber composition comprising (A) a rubber component comprising a conjugate diene base rubber, (B) a filler comprising 10 mass % or more of a white filler based on the whole fillers and (C) a partial ester compound of maleic anhydride and a (poly)oxypropylene derivative.
According to the present invention, capable of being obtained is a tire in which an abrasion resistance and a low heat build-up property are enhanced while improving a processability thereof without causing a reduction in the physical properties of a rubber composition and a problem on a working environment or a tire which is excellent in both of a driving stability and a wet gripping property.