Synthesis and characterization of a novel Fe3O4@SiO2/bipyridinium dichloride nanocomposite and its application as a magnetic and recyclable phase-transfer catalyst in the preparation of β-azidoalcohols, β-cyanohydrins, and β-acetoxy alcohols
Reactivity of Some Carboxylic Acids in Reactions with Some Epoxides in the Presence Chromium (III) Ethanoate
作者:Agnieszka Bukowska、Wiktor Bukowski
DOI:10.1021/op010112q
日期:2002.5.1
Reactivities have been compared of acetic, acrylic, and methacrylic acid in reactions with epichlorohydrin, phenylglycidyl ether, glycidyl acetate, and glycidyl methacrylate carried in the presence of chromium (III) ethanoate. The acid reactivities changed differently with respect to the oxirane series. The effect of solvents on the reactions of acids with epichlorohydrin has also been observed.
Chloride-free cationic polymers using acetate anions
申请人:Rohm and Haas Company
公开号:US11230616B2
公开(公告)日:2022-01-25
A composition contains ethylenically unsaturated quaternary ammonium cations with acetate counterions, where each of the ethylenically unsaturated ammonium cations contain only one non-aromatic carbon-carbon double bond and the composition contains less than one mole-percent chloride relative to quaternary ammonium cations can be polymerized to form a cationic polymer acetate.
Blends of polyolefins with functionalized polybutadienes
申请人:BRASKEM AMERICA, INC.
公开号:US11518871B2
公开(公告)日:2022-12-06
This invention relates to a polyolefin blend composition comprising a polyolefin base polymer component and a functionalized polybutadiene component. The polyolefin blend exhibits both i) an increased melt flow and ii) an increased impact toughness and/or melt elasticity, as compared to the same composition without the functionalized polybutadiene. This invention also relates to a method of increasing the melt flow of a polyolefin and simultaneously increasing the impact toughness and/or the melt elasticity of the polyolefin by blending a polyolefin base polymer component and a functionalized polybutadiene component.
POLYAMIC ACID, POLYIMIDE, PHOTOSENSITIVE RESIN COMPOSITION COMPRISING THE SAME AND DRY FILM MANUFACTURED BY THE SAME
申请人:LEE Kwang-Joo
公开号:US20110200939A1
公开(公告)日:2011-08-18
The present invention relates to a polyamic acid or polyimide comprising a heat-polymerizable or photo-polymerizable functional group, a photosensitive resin composition comprising the polyamic acid or the polyimide, a photosensitive resin composition being capable of providing a cured film that can be used for patterning at a high resolution and that has an excellent developing property in an alkaline aqueous solution, flexibility, adhesion strength, resistance to welding heat, and pressure cooker test (PCT) resistance, and a dry film prepared from the composition.