Preparation method of superfine a-type molecular sieve-red phosphorus synergistic flame retardant

Abstract

The present invention relates to a preparation method of superfine A-type molecular sieve-red phosphorus synergistic flame retardant. In the method, A-type molecular sieve is mixed with a certain amount of 0.1mol / L NiCl2 solution, and ion-exchanged at 60°C for 10-120min. , filtered, washed, dried, and then placed in a quartz tube reactor, hydrogen gas was passed through at 400-450°C for 10-90min, and then phosphine was passed through at 410-440°C for 2-10h, and finally the sample was insulated The air reaction vessel was heated at 260-290°C for 10-60 minutes to obtain a type A molecular sieve-red phosphorus synergistic flame retardant loaded with 5-35% (mass ratio) red phosphorus in the channels. The preparation process of the invention is relatively simple, which solves the shortcomings of using the red phosphorus flame retardant alone, and the prepared flame retardant has good flame retardant performance.

Description

technical field [0001] The invention belongs to the technical field of flame retardants, and in particular relates to a preparation method of an ultrafine A-type molecular sieve-red phosphorus synergistic flame retardant. Background technique [0002] With the enhancement of people's awareness of health and environmental protection, it has become an inevitable trend in the flame retardant industry to seek environmentally friendly, low-toxicity, high-efficiency, and multi-functional flame retardants. New flame retardant technologies such as ultra-fine technology, microencapsulation technology, compounding technology, and cross-linking technology are constantly developing. [0003] In modern flame retardant technology, the compounding of flame retardant is an extremely important aspect. Compounding is to use the interaction between flame retardants to improve the flame retardant performance, that is, the synergistic effect of flame retardants. The flame retardant system with...

AI Technical Summary

Problems solved by technology

However, when red phosphorus is used, there are the following problems: flammable, explosive, and long-term contact with air will release highly toxic pH 3 Gas; itself is red, easy to color the product; easy to absorb water, poor compatibility with polymers

Although the flame retardant effect of red phosphorus microcapsules is good, its preparation process is relatively complicated, and the particle size of the flame retardant is not easy to control, which limits its wide use.