High CTI microcapsule coated red phosphorus fire retardant master batch and preparation method thereof

Abstract

The invention discloses high-CTI microcapsule coated red phosphorus fire retardant master batch and a preparation method thereof. The high-CTI microcapsule coated red phosphorus fire retardant master batch is prepared from coated red phosphorus, a modified polyolefin carrier and kaolin synergist which are granulated. The high-CTI microcapsule coated red phosphorus fire retardant master batch is prepared from the coated red phosphorus, the modified polyolefin carrier and the kaolin synergist by weight percent: 55 to 65% of the coated red phosphorus, 15 to 25% of the modified polyolefin carrier and 15 to 25% of the kaolin synergist. The preparation method of the high-CTI microcapsule coated red phosphorus fire retardant master batch comprises the steps of preprocessing red phosphorus, physically removing iron, preparing melamine-formaldehyde resin prepolymer, performing red phosphorus microencapsulation, filtering, washing, drying and granulating. The high-CTI microcapsule coated red phosphorus fire retardant master batch can improve the flame-retardant efficiency of red phosphorus flame retardant, the compatibility of the red phosphorus flame retardant with a base material and the CTI value of the red phosphorus flame retardant products.

Description

technical field [0001] The invention belongs to the technical field of synthetic polymer material additives, and in particular relates to a high-CTI microcapsule-coated red phosphorus flame retardant masterbatch and a preparation method thereof. Background technique [0002] With the development of polymer technology, various new polymer materials have gradually entered various fields of the national economy and are closely related to all aspects of people's lives. Polymer materials have changed human life, making human life more convenient and of higher quality. But at the same time, human beings also have to face new fire threats. Since most polymer materials are flammable or combustible, and will release a large amount of toxic, harmful, and corrosive gases during the burning process, in the event of a fire, compared with natural materials such as wood, the possibility of human survival is smaller . Flame retardant, also known as fire retardant, fire retardant or flame...

AI Technical Summary

Problems solved by technology

However, some defects limit the application of red phosphorus flame retardants: (1) red phosphorus has a certain hygroscopicity, and it is easy to absorb water in the air to form H 3 PO 2 、H 3 PO 3 、H 3 PO 4 and other substances, which lead to oxidation and precipitation of red phosphorus, corrosion of molds, and damage to the mechanical properties of parts; (2) red phosphorus will release highly toxic PH while absorbing moisture to generate phosphoric acid 3 Gas, pollutes the environment, and endangers people's health; (3) The chemical instability of red phosphorus will have a negative impact on the performance of plastic products, especially the electrical properties of the parts; (4) The compatibility of red phosphorus and resin It is difficult to disperse in the resin, which will reduce the mechanical properties of the material, and the flame retardant effect is also difficult to exert; (5) red phosphorus is easy to be ignited by friction, and has a potential fire hazard; (6) the appearance of red phosphorus is purple , affecting the coloring of flame retardant products

The above shortcomings greatly limit the direct use of red phosphorus, so it is necessary to treat red phosphorus, such as microcapsule coating, to increase its stability, improve its shortcomings, and increase its application range

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