Lewis acid catalyzed reactivity switch: pseudo three-component annulation of nitrosoarenes and (epoxy)styrenes
作者:Anisha Purkait、Subhajit Saha、Santanu Ghosh、Chandan K. Jana
DOI:10.1039/d0cc02650f
日期:——
Lewis acid catalyzed alteration of annulation pattern allowed formation of arylquinolines via C–H functionalization of nitrosoarenes and C–C cleavage of (epoxy)styrene.
作者:Austin Acton、Annette D. Allen、Andrei V. Fedorov、Huda Henry-Riyad、Thomas T. Tidwell
DOI:10.1002/poc.1036
日期:2006.12
constants for hydration of the same substrates: logk2(TEMPO) = 1.64logk(H2O)−5.76 (r = 0.98). These results fit within a previously established correlation of ketenehydrationreactivity with aminoxyl radical reactivity, and confirm that the reactivity of TEMPO in additions to ketenes is dominated by the nucleophilic character of the aminoxyl oxygen, with a strong trend of increasing reactivity for more
THERMOPLASTIC ELASTOMER COMPOSITION, FOAM PRODUCT, AND PROCESS FOR PRODUCTION OF THE COMPOSITION OR FOAM PRODUCT
申请人:JSR Corporation
公开号:EP1958980A1
公开(公告)日:2008-08-20
A thermoplastic elastomer composition having a melt tension of 5.0 cN or more at 210°C and a pulling rate of 2.0 m/min and a compression set of 80% or less when measured according to JIS K6262 at 70°C and 22 hours is provided. The composition is obtained by dynamically treating a mixture of (A) a rubber and (B) a thermoplastic resin (B-1) and/or a thermoplastic resin composition (B-2) with heat in the presence of (C) a crosslinking agent.
RUBBER COMPOSITION CONTAINING MODIFIED POLYBUTADIENE RUBBER AND TIRE
申请人:Bridgestone Corporation
公开号:EP1975200A1
公开(公告)日:2008-10-01
A rubber composition comprises 10 to 70 parts by mass of carbon black having 20 to 100 m2/g of the specific surface area by nitrogen adsorption per 100 parts by mass of a rubber component comprising 20 to 80 parts by mass of a modified polybutadiene rubber and 80 to 20 parts by mass of natural rubber and/or at least one other diene-based synthetic rubber, wherein the modified polybutadiene is obtained by polymerizing 1,3-butadiene in an organic solvent using a compound having a rare earth element of the lanthanoid series, followed by modifying the obtained polybutadiene, and has a content of the cis-1,4-bond of 92% or greater, a content of vinyl bond of 1.5% or smaller and a fraction of the modified chain end of 20% or greater; and a tire using the rubber composition for a sidewall. The rubber composition exhibits excellent low heat buildup property and resistance to fracture.
POLYOLEFIN RESIN FOAM AND PROCESS FOR PRODUCTION THEREOF
申请人:JSR Corporation
公开号:EP2000500A1
公开(公告)日:2008-12-10
An object of the invention is to provide a polyolefin resin foam which is excellent in flexibility, cushioning property and processability, especially excellent in cutting processability. The present invention relates to a polyolefin resin foam obtained by foaming a polyolefin resin composition using carbon dioxide in a supercritical state, wherein the polyolefin resin composition contains at least: (1) a thermoplastic elastomer composition obtained by subjecting to a dynamically heat treatment a mixture of (A) a rubber, and (B) (B-1) an α-olefin crystalline thermoplastic resin and/or (B-2) an α-olefin amorphous thermoplastic resin, each having a melt tension of less than 3.0 cN at a temperature of 210°C and at a take-up speed of 2.0 m/min, in the presence of (C) a crosslinking agent; (2) a polyolefin resin; and (3) a nucleant agent having an average particle diameter of from 0.1 µm to less than 2.0 µm. The polyolefin resin foam has a density, for example, of 0.2 g/cm2 or less.