Process for preparing polyolefine/montmorillonite nano non-halogen flame-resisting material

Abstract

The present invention relates to the preparation process of nanometer flame retarding non-halogen polyolefin / montmorillonite material. Un-modified montmorillonite and ethylene monomer containing polar radical are made to produce in-situ reaction to form the nanometer flame retarding non-halogen polyolefin / montmorillonite material with intercalation structure. Owing to the blocking effect and nanometer effect of the intercalation structure of montmorillonite, the flame retarding non-halogen material has strengthened flame retarding performance, compensated mechanism and machining performance, and improved compatibility between montmorillonite and polyolefin.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a preparation method of a polyolefin / montmorillonite nanometer non-halogen flame retardant material. Background technique [0002] The existing polyolefin non-halogen flame retardant materials are generally endowed with flame retardant properties by directly adding non-halogen flame retardants; polymer / montmorillonite nanocomposites are generally modified by adding organic intercalants. Montmorillonite, under certain conditions, organic montmorillonite forms an intercalation or exfoliation structure in a polymer to prepare a polymer / montmorillonite nanocomposite material. At present, the advantages and disadvantages of the preparation methods of polyolefin non-halogen flame retardant materials and polymer / montmorillonite nanocomposites are as follows: [0003] 1. Existing polyolefin non-halogen flame retardant materials obtain flame retard...

AI Technical Summary

Problems solved by technology

[0003] 1. Existing polyolefin non-halogen flame retardant materials obtain flame retardant properties by directly adding non-halogen flame retardants. However, whether it is a phosphorus-nitrogen intumescent non-halogen flame retardant system with high flame retardant Low inorganic non-halogen flame retardant systems, the compatibility between non-halogen flame retardants and polyolefin resins is poor, when the flame retardancy is obtained, the mechanical properties and processing properties of polyolefins have been damaged to varying degrees

[0004] 2. The montmorillonites used in the preparation of existing polymer / montmorillonite nanocomposites are organic montmorillonites modified by organic intercalation agents, although organic montmorillonites can be used in polymers under certain conditions. The preparation of polymer / montmorillonite nanocomposites by forming an intercalation or exfoliation structure can significantly improve the properties of the polymer. However, the existing technical route for the preparation of organic montmorillonite is long and cumbersome, resulting in organic montmorillonite The price of soil is very expensive (the price of montmorillonite is about 1,000 yuan / ton, while the price of organic montmorillonite is as high as 20,000 yuan / ton or more), which seriously affects the practical application of montmorillonite, and in the case of organic montmorillonite A large amount of waste water is generated during the production process, polluting the surrounding environment

[0005] 3. The organic intercalants used in the existing organic montmorillonite are generally inert substances, and there is no functional group that can react with the polymer. Therefore, when the organic montmorillonite is added to the polymer as a modifier, there is a Due to the disadvantages of poor compatibility and difficult dispersion of olefin resin, it is difficult to achieve the expected nano-modification effect