Phenolic resin and urea resin composite modified plastic

Abstract

The invention discloses phenolic resin and urea resin composite modified plastic, comprising phenolic resin, urea resin and additives, wherein the additives comprise a toughening agent, a plasticizer, a weathering resisting agent, a compatilizer and a coupling agent, the toughening agent is polyvinyl alcohol, the plasticizer is diamyl phthalate, the weathering resisting agent is resorcinol monobenzoate, the compatibilizer is phthalic anhydride, and the coupling agent is vinyl triethoxysilane. The prepared phenolic resin and urea resin composite modified plastic has the effects of weathering resistance, good toughness, excellent dimensional stability and the like.

Description

technical field [0001] The invention relates to a plastic formula, in particular to a composite modified plastic of phenolic resin and urea-formaldehyde resin. Background technique [0002] Phenolic resin is one of the longest plastic varieties in history, commonly known as bakelite or bakelite, with a yellowish-brown or black appearance, and is a typical representative of thermosetting plastics. However, phenolic resin is easy to absorb water, so that the electrical properties of phenolic resin products are reduced, the mechanical strength is reduced, and the brittleness is large. Urea-formaldehyde resin is a colorless plastic that can be used as molding material, adhesive, etc., and is prepared from urea and formaldehyde. The urea-formaldehyde resin molding compound is filled with cellulose. Furthermore, it is excellent in hardness and mechanical strength. On the other hand, it has the disadvantages of brittleness, water absorption, and poor dimensional stability, and c...

AI Technical Summary

Problems solved by technology

On the other hand, it has the disadvantages of brittleness, water absorption, and poor dimensional stability, and cracks often occur even when left standing