The claimed method makes it possible to obtain phenol aldehyde resins with less molecular weight distribution reduced toxicity due to fuller removal of moisture and unreacted components, and also to improve properties of plastic foams based on said resins. EFFECT: more efficient preparation method. 2...
building panels and doors, comprises charging into a mould a foamable composition containing a phenol-formaldehyde resin, an acid... R Farkas,Winnington-ingram, Edward Nicholas 被引量: 0发表: 0年 method for the preparation of polyamideschuimstoffen. 1328957 Foamed polyamides STAMICARBON NV 19 Jan...
METHOD FOR THE PREPARATION OF 4-PHENOXY PHENOLSprocess for the production of 4 - phenoxyphenolen formula wherein r to r is hydrogen, halogen or alkyl. through diazotization of amines of the formula in salzsaurem medium and verkochung in w u00e4ssnger con felsaure 110 smoothlyVOLKWEIN ...
A system and method are provided wherein the phase equilibrium of a system comprised of Phenol, Bisphenol-A and a solvent mixture comprising Acetone and Wa... V Kelkar,TH Shan,DL O'Young 被引量: 0发表: 2005年 Eco-friendly method of preparation of high purity tetrabromobisphenol-A A highly...
The invention relates to a preparation method of a 2-[1-naphthenic vinyl] phenol derivative, namely a preparation method of a compound shown as in the general formula (I) and isomer thereof, and an intermediate thereof. The method has the advantages of short reaction route, cheap and ...
Enantioselective preparation of metoprolol and its major metabolites ( 4 ), was developed from their respective starting materials, 4-(2-methoxyethyl)phenol ( 1a ), 4-(2-hydroxyethyl)phenol ( 1b ) and methyl 4-... SH Jung,PT Linh,HK Lim,... - 《Archives of Pharmacal Research》...
The invention discloses a preparation method of 2, 4-dimethyl-6-(1-methyl-pentadecyl) phenol. The method takes 2, 4-dimethyl phenol and hexadecane as raw materials, and comprises the steps of putting the 2, 4-dimethyl phenol and the hexadecane into a reactor according to the batch charge...
Fungal RNA samples are usually isolated from fungal mycelia grown in liquid culture, which relies on prolific growth of the fungus in liquid media. The fungal biomass is then collected by vacuum filtration, which can result in low recovery for samples wi
Process for the preparation of polycarbonate A combined process for the preparation of polycarbonate from bisphenols and diaryl carbonates, the monophenol liberated being reacted again for the preparation of the diaryl carbonate and the alkali metal halide forming in the preparatio... P Ooms,A Bulan...
The introduction of sulphonic groups to urea melamineformaldehyde resins has been shown to improve their performance as chlorine exchange resins for treatment of drinking and swimming pool waters. The preparation of resins containing a r... M Wayman,LK Cheung - 《Canadian Journal of Chemical Engineer...