Rubber and plastic foaming aid and preparation method thereof

Abstract

The invention discloses a rubber and plastic foaming aid which comprises the following raw materials: modified carbon nanotubes, modified zinc oxide and expanded microspheres. The invention also discloses a preparation method of the rubber and plastic foaming aid. The modified carbon nanotubes are prepared by acidifying the carbon nanotubes in a concentrated sulfuric acid and concentrated nitric acid solution; carrying out an amidation reaction on the acidified carbon nanotubes and diethylenetriamine under the action of a dicyclohexylcarbodiimide condensing agent to obtain aminated carbon nanotubes; and finally, carrying out substitution on beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) acryloyl chloride and reactive hydrogen on amino of the aminated carbon nanotubes to obtain the modified carbon nanotubes; the expanded microspheres take cyclopentane with a lower boiling point as a core material and take a polymer as a shell, and a heating path of cyclopentane is prolonged; sodium thiocyanate and 3-chloropropyltriethoxysilane are taken as raw materials, and a silane coupling agent containing thiocyano groups is prepared under the action of a catalyst; and then the coupling agent is used for modifying zinc oxide to obtain the modified zinc oxide.

Description

technical field [0001] The invention belongs to the technical field of rubber and plastic processing aids, and in particular relates to a rubber and plastic foaming aid and a preparation method thereof. Background technique [0002] Rubber and plastic products are based on rubber and high molecular polymers, and are produced by physical foaming or chemical foaming to obtain sponge-like rubber-plastic porous structures. This technology is currently and widely used in Among various production industries, such as automotive door and window seals, buffer pads, building construction gaskets, anti-seismic materials, sports protection facilities, etc. [0003] Foaming agent is the most critical link in the production of rubber and plastic materials, and its selection is closely related to work efficiency and work quality. Generally speaking, to produce foamed products with good performance, it is necessary to choose a scientific and reasonable foaming agent, and the amount and met...

AI Technical Summary

Problems solved by technology

Generally speaking, to produce foamed products with good performance, it is necessary to choose a scientific and reasonable foaming agent, and the amount and method of use of the foaming agent must meet the current social development needs. At present, the foaming agent mainly contains organic foaming agents. Inorganic foaming agents and inorganic foaming agents, among which inorganic foaming agents mainly refer to sodium bicarbonate, ammonium bicarbonate, urea, etc. These foaming agents have the advantages of fast decomposition speed and low temperature in application, decomposing carbon dioxide and ammonia, When these gases exist, the rubber structure has a large permeability coefficient, and it is difficult to produce closed-cell foamed rubber. The prepared rubber and plastic products are of low quality, low strength, large shrinkage rate, and easy to deform. The commonly used organic foaming agent mainly contains nitrogen dimethyl Amide, nitroso, diphenylsulfonyl hydrazide ether, etc. The decomposition temperature of these materials in the application is about 200°C or more. Therefore, other foaming aids, such as urea, magnesium oxide, etc., need to be added during the production process. However, the existing foaming aids have poor compatibility with rubber and plastic substrates, single function, fast decomposition and degassing, and the instantaneous heat will cause cell collapse or merger, reducing the quality of rubber and plastic foam materials.