A kind of high flame retardant and low smoke toxicity sheet molding compound and its preparation method

Abstract

The invention relates to a high-flame-retardance and low-smoke toxicity sheet molding compound and a preparation method thereof. The formula of the plastic contains the following substances in parts by mass: 50-80 parts of unsaturated polyester resin, 15-60 parts of low-shrinkage additive, 1-3 parts of initiator, 0.01-0.05 parts of polymerization inhibitor, 0.7-7 parts of wetting and dispersing agent, 3-8 parts of internal release agent, 1-2 parts of thickener, 20-50 parts of viscosity-reducing filler, 100-200 parts of flame retardant A, 50-100 parts of flame retardant B, 50-250 parts of reinforcing material; the flame retardant A is micron aluminum hydroxide with a particle size of 0.4-3.5 microns, and the flame retardant B It is nano-level aluminum hydroxide with a particle size of 30-80 nanometers. The plastic of the invention has high flame retardancy, low smoke toxicity, and simultaneously has good mechanical properties and surface decoration effects.

Description

technical field [0001] The invention relates to the field of chemical raw materials, in particular to a sheet molding compound with high flame retardancy and low smoke toxicity and a preparation method thereof. Background technique [0002] Decorative materials for vehicles and large public places, especially for large-scale rail transit, not only require high strength, light weight, comfort, and good decorative effects, but also emphasize the safety of decorative and facility materials. As the market continues to develop on a large scale, sheet molding compound molded products have been widely used. This interior material particularly emphasizes its safety, especially the flame retardancy of the material. Therefore, sheet molding compound molded products are used in the production process The raw materials are flame retardant treated. At present, the following methods are generally used for flame retardant treatment of materials: one is to use halogen-containing or phospho...

AI Technical Summary

Problems solved by technology

At present, the following methods are generally used for flame retardant treatment of materials: one is to use halogen-containing or phosphorus-containing flame retardants. And produce a large amount of poisonous gas and smog, which will cause great damage to human life safety; the second is to add a large amount of aluminum hydroxide filler. The advantage of this method is that it can simultaneously improve the fire resistance of the material and control the smoke toxicity, but its disadvantages are: The addition of a large amount of ordinary aluminum hydroxide fillers will greatly reduce the surface quality and mechanical properties of the product, and lose its light weight and high strength characteristics, thus making the decoration or installation easily damaged