Whisker strengthening toughening halogen-free flame retardance phenolic aldehyde foamed plastic and preparation method thereof

Abstract

The invention discloses a whisker strengthening toughening halogen-free flame retardance phenolic aldehyde foamed plastic and a preparation method thereof. The plastic is prepared from, by weight, 100 parts of expandable phenolic resin, 1-5 parts of flexibilizer, 5-10 parts of surface active agent, 15 parts of foaming agent, 15 parts of curing agent, 3-10 parts of flame retardant and 1-5 parts of whisker fortifier. The invention further discloses the preparation method of the flame retardance toughening phenolic aldehyde foamed plastic. According to the plastic, intensity and toughness of the phenolic aldehyde foamed plastic are improved by using a few whiskers, the flame retardance property of the foamed plastic is improved by adding composite flame retardant, meanwhile the flame retardant of the phenolic aldehyde foamed plastic is further improved by adopting the new compound emulsifier, wherein the compression strength is higher than 0.2MPa, the heat conductivity coefficient is lower than 0.04W / m*k, the oxygen index is larger than 50%, the scaling-off rate is lower than 3%, and the flame retardance property (DIN 4102) reaches grade A; the plastic is a halogen-free flame retardance phenolic aldehyde foamed plastic with excellent comprehensive performance, the plastic can be applied to heat preservation field such as architecture, and fire prevention safety of heat preservation in building is greatly improved.

Description

technical field [0001] The invention relates to the field of preparation of polymer thermal insulation materials, in particular to a whisker-reinforced and toughened halogen-free flame-retardant phenolic foam used for thermal insulation materials in the fields of construction and the like and a preparation method thereof. Background technique [0002] Phenolic foam has low thermal conductivity, good thermal insulation performance, good thermal stability (long-term use below 140-160°C), corrosion resistance (resistance to all inorganic acids, organic acids, and organic solvents other than strong alkalis) ), the foam has a good closed-cell structure, low water absorption, strong steam penetration resistance, no condensation during cold storage, stable size, small change rate (size change rate <1% within the operating temperature range), weight It has been widely used in the field of thermal insulation due to a series of excellent properties such as light weight and convenie...

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Problems solved by technology

[0004] Based on the problems existing in the prior art, the purpose of the present invention is to provide a whisker-reinforced toughened halogen-free flame-retardant phenolic foam and its preparation method, which has excellent comprehensive performance, good strength and toughness, and solves the existing problems The problem of incompatibility between strength and toughness of halogen flame-retardant phenolic foamed plastics

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