Visible light photoredox-catalyzed hydrothiolation of enamides and enecarbamates
摘要:
An efficient visible light photoredox-catalyzed, Markovnikov selective, hydrothiolation reaction of enamides and enecarbamates is presented. This protocol is mild and operationally simple. This process provides access to N,S-acetal products from available thiols and a variety of enamides and enecarbamates. (C) 2020 Elsevier Ltd. All rights reserved.
RUBBER COMPOSITION AND PNEUMATIC TIRE MADE BY USING THE SAME
申请人:Bridgestone Corporation
公开号:EP0857752A2
公开(公告)日:1998-08-12
The present invention provides a rubber composition comprising natural rubber and/or diene synthetic rubbers, silica in an amount of 10 to 85 parts by weight per 100 parts by weight of the rubber, a specific silane coupling agent, i.e., a bis(alkoxysilylalkyl) polysulfide having a polysulfide structure in which the distribution of sulfur is specified, in an amount of 1 to 20% by weight of the amount of silica, and a specific silica dispersion improver in an amount of 1 to 15% by weight of the amount of silica, and provides a pneumatic tire manufactured by using the rubber composition. The pneumatic tire has excellent low heat buildup property and abrasion resistance.
BLOCK COPOLYMER AND SURFACE TREATMENT AGENT USING SAME
申请人:Tosoh Corporation
公开号:EP3495400A1
公开(公告)日:2019-06-12
The present invention addresses the problem of providing a block copolymer which is useful as a surface treatment agent for cell culture substrates, said surface treatment agent enabling cell separation in a short period of time. The above-mentioned problem is solved by a block copolymer that comprises the following blocks (A), (B) and (C). (A) a temperature-responsive polymer block that has a lower critical solution temperature (LCST) within the range of from 0°C to 50°C with respect to water (B) a hydrophilic polymer block that does not have an LCST within the range of from 0°C to 50°C, while having an HLB value (as determined by a Griffin method) within the range of from 9 (inclusive) to 20 (exclusive) (C) a hydrophobic polymer block that does not have an LCST within the range of from 0°C to 50°C, while having an HLB value (as determined by a Griffin method) within the range of from 0 (inclusive) to 9 (exclusive)
Multi-component particles comprising inorganic nanoparticles distributed in an organic matrix and processes for making and using same
申请人:SICPA HOLDING SA
公开号:US10428186B2
公开(公告)日:2019-10-01
Multi-component particles comprising inorganic nanoparticles distributed in an organic matrix and processes for making and using same. A flowing aerosol is generated that includes droplets of a precursor medium dispersed in a gas phase. The precursor medium contains a liquid vehicle and at least one precursor. At least a portion of the liquid vehicle is removed from the droplets of precursor medium under conditions effective to convert the precursor to the nanoparticles or the matrix and form the multi-component particles.
Block copolymer and surface treatment agent using same
申请人:TOSOH CORPORATION
公开号:US11046803B2
公开(公告)日:2021-06-29
The present invention addresses the problem of providing a block copolymer which is useful as a surface treatment agent for cell culture substrates, said surface treatment agent enabling cell separation in a short period of time. The above-mentioned problem is solved by a block copolymer that includes the following blocks (A), (B) and (C): (A) a temperature-responsive polymer block that has a lower critical solution temperature (LCST) within the range of from 0° C. to 50° C. with respect to water (B) a hydrophilic polymer block that does not have an LCST within the range of from 0° C. to 50° C., while having an HLB value within the range of from 9 (inclusive) to 20 (exclusive) (C) a hydrophobic polymer block that does not have an LCST within the range of from 0° C. to 50° C., while having an HLB value within the range of from 0 (inclusive) to 9 (exclusive).
A responsive microgel is provided which responds volumetrically and reversibly to a change in one or more aqueous conditions selected from the group consisting of (temperature, pH, and ionic conditions) comprised of an ionizable network of covalently cross-linked homopolymeric ionizable monomers wherein the ionizable network is covalently attached to an amphiphilic copolymer to form a plurality of ‘dangling chains’ and wherein the ‘dangling chains’ of amphiphilic copolymer form immobile micelle-like aggregates in aqueous solution. A responsive microgel is further provided that comprises at least one therapeutic entity and delivers a substantially linear and sustained release of the therapeutic entity under physiological conditions.