| 摘要 |
The invention comprises association products of from 90 to 5 parts by weight of a polymeric ether compound containing at least an average of 400 non-cyclic aliphatic oxygen ether groups and from 10 to 95 parts by weight of a compound which contains at least one phenolic group. They are formed by merely contacting or mixing the components. The products may also include a polycarboxylic acid containing 0.3 to 1.7 free carboxylic acid groups per 100 molecular weight and having an average molecular weight of 600 to 2,000,000, e.g. polyacrylic acid. The association may be formed with or without condensation of the phenolic compound which may be in the form of a phenol-aldehyde condensate. Specified polyethers include polyalkylene oxides, particularly polymers and copolymers of ethylene-, propylene- and butylene oxides; condensates of alkylene oxides with other compounds, e.g. mono- and poly-hydric alcohols, phenols, carbohydrates, novolaks, polyamides, cellulose and its derivatives, &c.; polyethers which have been reacted with diisocyanates, diepoxides and other compounds giving a wide variety of end-groups. Specified phenols include substituted and unsubstituted mono-, di-, tri- and higher poly-nuclear phenols, mixtures of isomers, extracts from natural products, e.g. tanning, and novalaks and resoles. The contacting of the polyether and phenolic compound may be effected in a solvent, e.g. water for polyethylene oxide, or a non-solvent, or mixed together as a hot melt or in conventional thermoplastic equipment. When mixed in solution, precipitation of the association product may occur at a pH below 8. This may be prevented by the addition of compounds such as water-soluble ketones, monoalkyl ethers of alkylene glycols, basic alkali metal compounds, ammonia, water-soluble amines, alcohols, and other organic compounds. An aldehyde may be added to the polyether and phenol in any order and condensation effected with the aid of a catalyst. Inert additives which may be incorporated in the products include fillers, e.g. calcium carbonate, clay, mica, carbon black and wood flow; softening agents, e.g. water and alcohols; and dyes, pigments &c. Many examples are given, including for comparison, association products of (25) a phenolformaldehyde condensate and polyvinyl ether, and (26) a phenol-formaldehyde condensate and carboxymethyl cellulose. Uses: printing plates, gramophone records, gears, bearings, gaskets, washers, plugs, seal rings, pulleys, shoe soles, skis, tobacco containers, humidors, flower pots, floor tiles, pump impellers, pipes, solid rocket fuels, wood glues, films, sizing agents &c. Specifications 667,732, 818,737, 857,107, 869,113, 869,115 and 889,116 are referred to. |
