Cashew shell modified alkyd resin and preparation method thereof

Abstract

The invention relates to a production method of cashew nut oil modified phenolic resin. Phenol and cashew nut oil are sufficiently mixed under the acidic or alkaline environment, wherein, the main ingredient of the cashew nut oil is the polyhydric phenol of C8-C27, the weight of the cashew nut oil accounts for twenty to thirty percent (weight percentage) of the total weight of the cashew nut oil and the phenol, and the acidic environment is obtained by using catalyst, the addition amount of which is one to three percent (one to two percent for the alkaline environment); the mixture is mixed with formaldehyde, temperature is raised, reaction lasts until the synthesis of the phenolic resin is finished, and wherein, the molar ratio of the formaldehyde is 1:0.72 to 0.78 (1:1.2 to 1.4 for the alkaline environment. the catalyst must be ammonia). The thermoplastic phenolic resin prepared by the invention is characterized in low free phenol and high molecular weight and can be applied to not only molding materials but also friction materials; meanwhile, the production process of the modified phenolic moulding materials is simple, the use amount of phenol and formaldehyde is reduced, the concentration of wastewater is lowered, and therefore environment is protected; moreover, the plant oil applied by the preparation method of the invention is a regenerative resource.

Description

technical field [0001] The invention relates to the field of manufacture and application of modified phenolic resin, in particular to a phenolic resin modified by cashew nut shell oil and a manufacturing method. Background technique [0002] Phenolic resin is one of the earliest used resins, and there are many kinds of modifications. It is widely used and has irreplaceable functions in coatings, friction materials, and plastics. With the global energy shortage and the emphasis on environmental protection, it is difficult for ordinary phenolic resins to meet the needs of the market. In addition, in the production of traditional production methods, it is difficult to control the consistency of quality, especially in the modification reaction, not only need Special catalysts also require special raw materials, and the production process has become complicated. Therefore, although the quality has been greatly improved, the cost has also increased a lot. SUMMARY OF THE INVENTIO...

AI Technical Summary

Problems solved by technology

With the global energy shortage and the emphasis on environmental protection, it is difficult for ordinary phenolic resins to meet the needs of the market. In addition, it is difficult to control the consistency of quality in the production of traditional production methods, especially in the modification reaction. Special catalysts require special raw materials, and the production process becomes complicated. Therefore, although the quality has been greatly improved, the cost has also increased a lot.