PZ production process applied to rubber foaming product

Abstract

The invention discloses a PZ production process applied to a rubber foaming product, which is characterized in that the reaction rate is controlled by using zinc oxide and dropwise adding amine, and the morphology of a zinc dimethyldithiocarbamate product is regulated and controlled by controlling the stirring rate. The vulcanization rate of the colloid and the foaming rate of the foaming agent can be matched with each other in the preparation process of the rubber and plastic foaming product, the air hole distribution of the obtained foaming material is relatively uniform and fine, and the rubber and plastic foaming product with good toughness and strength performance is finally prepared from paper.

Description

technical field [0001] The invention relates to the field of synthesis of vulcanization accelerators, in particular to a PZ production process applied to rubber foam products. Background technique [0002] Rubber-plastic foaming materials are made of plastics, rubbers and other raw materials, with catalysts, foam stabilizers, foaming agents and other auxiliary materials, through physical foaming or cross-linking foaming, a large number of fine foams appear in plastics and rubbers, the volume increases, and the density is increased. The soft foam material is light in weight, good in softness, and has the functions of buffering, sound absorption, shock absorption, heat preservation, filtration, etc. It is widely used in electronics, home appliances, automobiles, sports and leisure industries. [0003] Rubber and plastic foam materials need to be vulcanized and foamed, and vulcanization requires a vulcanizing agent and a vulcanization accelerator. Thiocarbamate is an important...

AI Technical Summary

Problems solved by technology

The traditional preparation of PZ is usually carried out by batch reaction of organic amine, carbon disulfide, liquid caustic soda and zinc salt. However, it is often difficult to obtain a stable shape for the prepared PZ, and the obtained shape is mostly powdery or other irregular shapes.

And it will produce different vulcanization and foaming matching effects in the preparation process of rubber and plastic foam materials, especially powdery or other irregular shapes will affect the application of PZ in rubber and plastic foaming

This is because the zinc salt of the traditional process has a fast reaction rate in the preparation process, and can quickly react with the reaction product of amine and carbon disulfide to form a precipitate. The reaction rate is difficult to control, and the obtained precipitate has poor morphology. Poor dispersion, which in turn affects the vulcanization of rubber and plastic foam materials, and ultimately affects the foaming effect of rubber and plastic foam materials

[0007] In the prior art, CN114133752A discloses a high-temperature-resistant thermal insulation board and a preparation method thereof, which uses at least one of dipentylthiuram tetrasulfide and zinc dimethyldithiocarbamate as a vulcanization accelerator, The accelerator can promote the activation of the vulcanizing agent, thereby accelerating the cross-linking reaction between the vulcanizing agent and the rubber molecule, achieving the practical effects of shortening the vulcanization time, lowering the vulcanization temperature, increasing production, and reducing production costs. It is beneficial to dispersion, and it is easier to affect air permeability in promoting crosslinking, and affects vulcanization and foaming effects; CN102443214A discloses a preparation method of high-magnification polyethylene foam material, which uses zinc dimethyl dithiocarbamate (PZ) and bis-tert-butylperoxydiisopropylbenzene (BIPB) were used as compound cross-linking agents to prepare foamed materials, and polyethylene foamed materials with ideal mechanical properties and high-rate foaming properties were obtained, but the The cross-linking agent used does not involve the shape control of the cross-linking agent, but the shape of the vulcanization accelerator will affect the cross-linking and foaming of the system, resulting in process instability, which in turn affects the rate of vulcanization and foaming systems and effects

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