Bisphenol A isocyanate phenolic resin and preparation method thereof

Abstract

The invention discloses a bisphenol A isocyanate phenolic resin and a preparation method thereof. According to the method, hexamethylene diisocyanate is adopted as a grafting monomer, dibutyltin dilaurate is adopted as a catalyst, under the action of a catalyst, the hexamethylene diisocyanate is grafted, then a bisphenol A formaldehyde phenolic resin with rigidity and the hexamethylene diisocyanate can be subjected to chemical reactions at a normal temperature as isocyanate can be easily reacted with a polyhydroxy compound and has very high reaction activity, and the defects that the bisphenolA formaldehyde phenolic resin is low in reaction activity at a normal temperature, complex in preparation process and high in energy consumption in reaction can be solved; the preparation method is simple in preparation process, a main body reaction can be sufficient, the grafting rate is high, and as hydroxyl on the bisphenol A formaldehyde phenolic resin is replaced by an isocyanate group, thehydrophilcity of the prepared bisphenol A formaldehyde phenolic resin can be weakened and the waterproof properties can be improved.

Description

【Technical field】 [0001] The invention belongs to the field of adhesives, and in particular relates to a bisphenol A isocyanate phenolic resin and a preparation method thereof. 【Background technique】 [0002] Bisphenol A formaldehyde phenolic resin is liquid at room temperature, and it is a thermoplastic linear polymer. Under normal temperature or heating conditions, bisphenol A formaldehyde phenolic resin reacts with curing agent and cross-links to form an insoluble three-dimensional network structure polymer plastic. , and shows its inherent excellent performance, widely used in automobiles, ships, aviation, machinery, chemical industry, electrical and electronic industry, heavy machinery manufacturing industry, large-scale water conservancy engineering and civil construction industry and other fields. Bisphenol A formaldehyde phenolic resin has excellent adhesion, corrosion resistance, electrical insulation, mildew resistance, heat and cold resistance, and good mechanical...

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Problems solved by technology

Bisphenol A formaldehyde phenolic resin has excellent adhesion, corrosion resistance, electrical insulation, mildew resistance, heat and cold resistance, and good mechanical properties, however pure bisphenol A formaldehyde phenolic resin has a high cross-linking Density, so there are brittleness, fatigue resistance, heat resistance, impact toughness, and the hydroxyl group is exposed on the outside, so its water resistance is average. The above shortcomings are difficult to meet the requirements of engineering technology, so that it is subject to certain development restrictions in the application field. , so the modification of bisphenol A formaldehyde phenolic resin to improve its water resistance has always been a hot research direction for researchers.

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