Rubber protective agent

Abstract

This invention discloses a rubber anti-aging agent, which comprises: low-melting-point paraffin 16-36 wt.%, high-melting-point paraffin 32-44 wt.%, microcrystalline petroleum wax 20-36 wt.%, EVA polymer 0.5-3 wt.%, synthetic polyethylene wax 1-3 wt.%, cationic surfactant 2-5 wt.%, and antioxidant 1-3 wt.%. The rubber anti-aging agent has ideal protection effect and protection life in a wide temperature range. The EVA polymer can control the melt viscosity of the rubber anti-aging agent, and improve its toughness and softness. The antioxidant can retard the oxidation process of the rubber anti-aging agent, improve its anti-ozone ability, and prolong its protection life. The cationic surfactant can make the rubber anti-aging agent have high adhesion and permeation performance, as well as high antistatic performance, and improve the ground friction of rubber tyres.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a physical rubber protective agent used to prevent cracking and aging of various rubber products. Background technique [0002] The wide application of rubber products promotes the rapid development of the rubber industry. In order to prolong the life of rubber products and prevent rubber products from cracking and aging due to the combined effects of sunlight and various gas factors under natural weather conditions, it is generally necessary to use rubber products in rubber products. Add chemical and physical anti-aging agents to prevent aging. Physical anti-aging agents are mainly made of wax products. Due to their different composition and components, wax anti-aging agents have different compatibility with rubber materials. Anti-aging agents have the requirements of n-alkane, iso-alkane content and carbon number distribution. When waxes are added to rubber and their ...

AI Technical Summary

Problems solved by technology

Although wax substances have a protective effect on rubber, in order to make the rubber protective agent play a protective role with high quality and high efficiency, there are also certain requirements for its other properties: when the protective agent is added to the rubber, it must have a certain temperature range. Migration speed; after migrating to the rubber surface, a protective film of a certain thickness must be formed, and the protective film must have certain adhesion and toughness; the film must have a certain density and density, and there are no gaps; the film should be It has antistatic properties and certain high temperature resistance. In order to make the rubber protective agent have these properties, the protective agent must have appropriate material components, and the content and carbon number distribution of normal and isoparaffins in the protective agent should also be appropriate. N-alkane has good mutual compatibility with rubber, and has a large mutual capacity at a certain temperature. Because it is a straight chain and has no side chain carbon chain resistance, its migration speed is fast, the migration amount is large, and the formed film is thicker. However, n-alkane crystallization is relatively large, so the formed film has a loose structure, poor compactness and flexibility, and poor adhesion, and is easy to fall off in a short time, reducing the protective effect. Due to the branched molecular structure of isoparaffin, it is easy to form Criss-cross disordered state, relatively low compatibility with rubber

Its migration speed is slow and different due to different side chain resistances, but the crystallization of isoparaffin is smaller, and the formed film density, compactness and flexibility of the film are better, and the protection of the surface of rubber products is better. In this way, by adjusting the normal and isomeric alkane content of the rubber protective agent and the carbon number distribution structure of the alkane, adding some additives can make an ideal wax rubber protective product. At present, various rubber protective agents used in the market All have certain protective effects, but there are generally defects in performance. For example, U.S. Patents (US4877456, US5296129) disclose a rubber protective agent. Due to the high content of normal paraffins, one or more isoparaffins Concentration, fast migration speed, large amount, manual cannot effectively control the migration of alkanes in a wide temperature range, the formed protective film is thick, the film performance is not good, and there is no antistatic ability. These defects make high-quality rubber with long protective life The product cannot achieve the desired effect