Preparation method for dimethylolpropionic acid modified water-based phenolic resin

Abstract

The invention relates to a preparation method for dimethylolpropionic acid modified water-based phenolic resin. The preparation method comprises the following steps: mixing flax oil and maleic anhydride at ordinary temperature, and rising temperature to be 240-250 DEG C to obtain a first product; mixing tung oil, polyhydric alcohol and potassium hydroxide, and rising temperature to be 240-250 DEG C; cooling the obtained reaction product to be 170-190 DEG C, adding phthalic anhydride, hydroxymethyl cellulose and benzoic acid, flowing back dimethyl benzene, rising temperature to be 170-190 DEG C and preserving heat for 0.5-1.5 h, and then rising temperature to be 200-210 DEG C and preserving heat for 6-8 h to obtain a second product; mixing butyl ether, 2-5 parts by weight of n-butanol, sodium dodecyl benzene sulfonate, tetramethyl orthosilicate and the first product, then adding the second product, and adding an amine neutralizing agent when the temperature is reduced to be 95-105 DEG C, so as to obtain the water-based phenolic resin. The water-based phenolic resin is good in toughness and benzene-free, and the VOC discharge amount is reduced.

Description

technical field [0001] The invention relates to the technical field of chemical industry, more specifically, to a preparation method of dimethylol propionic acid modified water-based phenolic resin. Background technique [0002] Dimethylolpropionic acid is a multi-purpose organic raw material. It is not only a chain extender in the manufacture of water-based polyurethane, but also enables polyurethane to obtain self-emulsifying properties, and can be made into self-emulsifying water-based polyurethane with excellent stability; it is also used in The preparation of polyurethane aqueous emulsion leather finishing agent is an upgraded product of the traditional water emulsion polyacrylate leather finishing agent; it can also be used as an additive to improve polyester resin, and as a raw material for manufacturing photosensitive resin and liquid crystal. [0003] Phenolic resin is generally a kind of resin produced by high-temperature polymerization of tung oil, phthalic anhydr...

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Problems solved by technology

[0003] Phenolic resin is generally a kind of resin produced by high-temperature polymerization of tung oil, phthalic anhydride, glycerin, pentaerythritol, and No. 200 solvent oil. It is characterized by good weather resistance, but it has large VOC emissions during production and use, and the safety factor is not high. It is flammable and explosive during use and transportation. It is a dangerous chemical and has great pollution to the environment. It is a nationally listed and eliminated product.