摘要:
Refractory shaped articles are prepared by heating refractory mixes comprised of refractory particles and an alkoxy modified phenolic resole resin having at least one alkoxy methylene group for every 20 phenolic hydroxyl groups.
摘要:
The new petroleum breakers are obtained by subjecting (a) an addition reaction product which has been obtained by reacting aliphatic aldehydes with phenol in a molar ratio of 1:1 to 3:1 at temperatures of 50.degree. to 80.degree. C. in the presence of an alkaline catalyst, to a condensation reaction at 80.degree. to 150.degree. C., after prior neutralization and, if appropriate, in the presence of inert solvents, with (b) a block polymer which has been prepared by reacting polypropylene glycols having molecular weights of 1,300 to 3,000 with 20 to 100% by weight of ethylene oxide in the presence of alkaline catalysts, in a ratio of 0.5 to 4 moles of (a) to 1 mole of (b), and removing the water of the reaction which is formed, and (c) adding on 10 to 400 g of propylene oxide, relative to 100 g of condensation product, or 10 to 200 g of ethylene oxide and propylene oxide in a ratio of 1:0.5 to 14, relative to 100 g of condensation product, in an addition reaction, to the etherified phenol/aldehyde condensation product thus obtained. When used for separating petroleum emulsions, they effect, in particular, a high and rapid removal of salt.
摘要:
Modified benzyl ether-containing resole polyols derived from a phenolic component, a non-aqueous aldehyde, and a halogen-containing aliphatic hydroxyl component are prepared using a metal derivative as a catalyst. These polyols react with organic polyisocyanates to yield closed cell, low friability, low combustibility, rigid polyurethane foams without the need for post curing at elevated temperature. They are also useful in the preparation of modified rigid polyisocyanurate foams.
摘要:
Modified benzyl ether-containing resole polyols derived from phenol, paraformaldehyde and an aliphatic hydroxyl compound are prepared using a metal derivative as a catalyst. These polyols react with organic polyisocyanates to yield closed cell, low friability, low combustibility, rigid polyurethane foams without the need for post curing at elevated temperature. They are also useful in the preparation of modified rigid polyisocyanurate foams.
摘要:
Filament reinforced phenolic resin products are provided which comprise a plurality of filaments and a cured, normally liquid phenolic resin interspersed around the filaments. The filaments can be in the form of continuous fibers, roving, woven roving, cloth and mat. The products are useful in structural applications. Also disclosed are novel glycol-modified resole phenolic resins and oligomeric polyol-modified resole phenolic resins.
摘要:
A conductive polymer comprising a fiber-forming synthetic polymer having dispersed therein as a separate phase between 1% and 20% by weight inclusive based on the polymer of a polyalkoxylated phenol-formaldehyde condensate. Conductive fibers may be produced by melt spinning the conductive polymer.
摘要:
An etherified phenolic chelate resin prepared by stabilizing and protecting the chelate groups of a phenolic chelate resin and then converting some or all of the phenolic hydroxyl groups into ether groups; a process for the production of the etherified phenolic chelate resin; and a method for separating a heavy metal ion from an aqueous solution having a pH of at least 7 by using this etherified phenolic chelate resin.
摘要:
A method is disclosed for adhering rubber and reinforcing materials simultaneously with vulcanization, without defects such as fume and bloom phenomena of formaldehyde-acceptors, deliquescence and blocking, which is characterized in the use of a vulcanizable rubber composition containing an improved co-polycondensate resin which is prepared by condensing (A) a resol type pre-polycondensate prepared by at least one phenol and formaldehyde or acetaldehyde in the presence of an alkaline catalyst, and (B) resorcinol, m-aminophenol or the like, while distilling off water present in the reaction system, and then solidifying the reaction mixture.
摘要:
The disclosure relates to a composition of matter comprising blends of certain polyether polyols with a class of compatible aminoplast cross-linking agents and the use of such compositions with or without diluents.
摘要:
1. A FRICTION ELEMENT COMPOSITION COMPRISING A FRICTION IMPARTING AGENT, AN INORGANIC FILLER AND A BINDER COMPOSITION COMPRISING A NON-HYDROXYALKYLATED HYDROXY AROMATIC HYDROCARBON ALDEHYDE RESOLE CONTAINING SUBSTANTIALLY NO ETHERIFIED AROMATIC HYDROXYL GROUPS AND AN HYDROXYALKYL HYDROXY AROMATIC HYDROCARBON ALDEHYDE RESOLE CONTAINING LESS THAN ABOUT 0.5 PERCENT OF THE AROMATIC HYDROXYL ORIGINALLY PRESENT IN THE HYDROXYL AROMATIC HYDROCARBON ALDEHYDE CONDENSATE.