Industrial lignin reinforcing rubber and preparation method thereof

Abstract

The invention relates to industrial lignin reinforcing rubber and a preparation method of the industrial lignin reinforcing rubber. The industrial lignin reinforcing rubber is characterized in that 1, the industrial lignin reinforcing rubber comprises lignin dispersoid, rubber latex, a small number of plasticizers and operation oil or comprises multi-component lignin dispersoid, rubber latex, a small number of plasticizers and operation oil; 2, the lignin dispersoid is suspension of lignin in water, the weight part of the lignin is 5 to 30 percent, the multi-component lignin dispersoid is suspension of the lignin and inorganic fillers in water, and the weight proportion of the lignin to the water is (5-30):(95-70); and 3, in the lignin dispersoid and the multi-component lignin dispersoid, the lignin is hydroxymethylation modified dispersoid. The preparation method comprises the steps of 1. lignin preparation, 2, lignin dispersoid preparation, 3, rubber latex preparation, 4, cosedimentation and solidification and 5, industrial lignin reinforcing rubber obtaining. The industrial lignin reinforcing rubber and the preparation method have the advantages that the physical and mechanical properties of the rubber are not reduced, meanwhile, the drying processes in the lignin and rubber production process are combined, and the motive power consumption of rubber mixing is reduced.

Description

technical field [0001] The invention relates to an industrial lignin reinforced rubber and a preparation method thereof. It belongs to the technical field of chemical materials and their preparation. Background technique [0002] Traditionally, the production of rubber products requires the use of rubber mixers, open mixers, continuous screw mixers and other equipment to combine raw rubber with reinforcing agents, fillers, vulcanization accelerators, antioxidants, operating oils, and functional aids. The mixing method is also called dry mixing. This mixing process requires a lot of power. Reinforcing agent and operating oil are the most used additives in the rubber industry. The power consumption of kneading reinforcing agent and operating oil accounts for more than 40% of the rubber mixing power. For many years, people have been looking for the most reasonable method to add reinforcing agent and operating oil to the rubber with a large amount of addition and difficulty i...

AI Technical Summary

Problems solved by technology

[0011] Therefore, using carbon black as a reinforcing agent for rubber, although compared with the traditional rubber mixing method in terms of technology and economy, has certain advantages, it also has the following disadvantages: (1) Since carbon black is a hydrophobic material , when preparing the carbon black dispersion, the shear force of the carbon black particles in the ball mill is much smaller than that of the mixing, so the carbon black in the raw rubber cannot reach the level that the traditional mixing method can achieve. Scattered scales lead to weakening of some properties of the rubber, such as a decrease in tear strength and an increase in permanent deformation

(2) The amount of carbon black added to the latex is also greatly limited, mainly because carbon black has a high density and hydrophobic properties, and the dispersion stability is poor, which cannot meet the expectations of rubber products. The purpose of adding most of the carbon black to raw rubber by emulsion co-precipitation