A high-concentration and high-blackening microcapsule-coated red phosphorus flame retardant masterbatch and its preparation method

Abstract

The invention discloses high-concentration and high-blacking-capability microcapsule-coated red phosphorus flame retardant masterbatch and a preparation method thereof. The high-concentration and high-blacking-capability microcapsule-coated red phosphorus flame retardant masterbatch is prepared from coated red phosphorus and a modified polyolefin carrier, wherein the mass ratio of the coated red phosphorus to the modified polyolefin carrier is 7:3; the coated red phosphorus is prepared from red phosphorus powder and a coating raw material. The preparation method comprises the following steps: pretreating red phosphorus, adding the coating raw material, carrying out in-situ polymerization and coating, and carrying out filtration, washing, drying, granulation and other steps. According to the high-concentration and high-blacking-capability microcapsule-coated red phosphorus flame retardant masterbatch and the preparation method, the problems that a red phosphorus flame retardant is not black enough during use, and cannot be blacked effectively when being added with black dye are solved effectively; the flame retardant efficiency can be improved; the chemical stability of red phosphorus and the compatibility of red phosphorus to a polymer substrate are improved.

Description

technical field [0001] The invention belongs to the technical field of additives for synthetic polymer materials, and in particular relates to a high-concentration and high-blackening microcapsule-coated red phosphorus flame retardant masterbatch and a preparation method thereof. Background technique [0002] With the development of polymer technology, synthetic materials with excellent performance have begun to enter various fields of the national economy. At the same time, people have to face new fire threats. Since most polymer materials are combustible and will release a large amount of toxic and harmful gases during combustion, flame-retardant modification of polymer materials is an important research direction in the field of polymer modification in the future. Flame retardant, also known as fire retardant, fire retardant or flame retardant, is an additive used to improve the flame resistance of materials, prevent materials from being ignited and inhibit flame propaga...

AI Technical Summary

Problems solved by technology

However, some defects of red phosphorus flame retardants seriously limit its application in the field of polymer flame retardancy, such as: (1) red phosphorus will be slowly oxidized in the air to form H 3 PO 2 、H 3 PO 3 、H 3 PO 4 Such substances are easy to precipitate after long-term storage, deteriorate the mechanical properties of materials, and corrode processing equipment; (2) When red phosphorus flame-retardant products are used for a long time, they slowly release PH 3 gas, pollute the environment, and endanger people's health; (3) the compatibility of inorganic red phosphorus and organic resins is poor, and the dispersion in resins is poor, which has a greater impact on the mechanical properties of polymers, which also limits to a certain extent (4) The appearance of red phosphorus is reddish brown, and its flame retardant products can only be made into red or black, and it is difficult to achieve the effect of pure black

The above shortcomings greatly limit the direct use of red phosphorus, so it is necessary to treat red phosphorus, such as microencapsulation, to increase its stability, compatibility, etc., so that it can meet the use standards and give full play to its high efficiency. cheap advantage

Images