4results about How to "Lower Mooney Viscosity" patented technology

This invention discloses an environmentally friendly plasticizer using modified lignin as a carrier, a rubber composition, and a method for preparing the same, relating to the field of rubber processing technology. The environmentally friendly plasticizer using modified lignin as a carrier, by weight, comprises the following components: 50 parts modified lignin, 25 parts plasticizing active ingredient, 8 parts dispersant, 5 parts anti-aging agent, and 3 parts stabilizer. The modified lignin is a lignin oligomer containing ester, acetyl, and ether cross-linked structures, with a weight-average molecular weight of 800-1200 Da, a dispersion coefficient ≤1.5, and a carboxyl content ≤0.2 mmol / g. This invention successfully overcomes the technical defects of existing plasticizer carriers, such as high toxicity, difficulty in degradation, and poor compatibility with polymer matrices, providing an environmentally friendly plasticizer using modified lignin as a carrier. This technical solution achieves the dual goals of high-value utilization of lignin and greening of the plasticizer product.

This invention discloses a precipitated silica dispersant for rubber, its preparation method, and its application, relating to the field of rubber additives. The precipitated silica dispersant for rubber is made from raw materials comprising the following proportions: modified vegetable oil and hydroxide, wherein the molar ratio of the modified vegetable oil to the hydroxide is 1:(0.3-0.6), and the modified vegetable oil is copolymerized from vegetable oil monomers, benzene ring unsaturated monomers, and cashew nut phenol. This application provides an environmentally friendly and safe precipitated silica dispersant that can significantly improve the dispersibility of precipitated silica in rubber compounds while simultaneously improving the mechanical properties of the rubber compounds.

The present application relates to a kind of novel light color alkali-resistant and hydrogen peroxide immersion roller, including outer rubber layer and internal core, the outer rubber layer is wrapped in the outside of internal core;The outer rubber layer includes component by weight fraction: chlorosulfonated polyethylene rubber, 70~90 parts;Ethylene-propylene-diene rubber, 10~30 parts;Iron red, 5~8 parts;Red lead, 10~20 parts;Reinforcing agent, 50~80 parts;Vulcanizing agent, 3 parts;Accelerator, 2~3 parts;Plasticizer, 10 parts;Antioxidant, 1~1.5 parts;Extrusion dispersing agent, 3 parts, the advantage of the present application is that other auxiliary materials and extrusion dispersing agent are matched, the Mooney viscosity of compound is reduced, the process performance of compound in the process of forming extrusion is improved, the high temperature resistance, alkali resistance, hydrogen peroxide resistance, chemical medium resistance and other properties of immersion roller are improved, thereby prolonging the service life.

The invention provides a method for preparing low-protein natural rubber through enzyme compounding, and belongs to the technical field of preparation of low-protein natural rubber products. When the low-protein natural rubber is prepared, pancreatin and trypsin are matched according to the mass ratio of 1: 1, and when the dosage is 0.2 wt%, the protein content of a sample is the lowest. The low-protein natural rubber prepared by the process is superior to acid-coagulated natural rubber in tensile strength, aging property, Mooney viscosity and the like. Compared with the use of the traditional single protease, the use of the compound protease is obviously better than the use of the single protease, and the nitrogen content in the natural rubber can be reduced to about 0.086%; compared with a centrifugal method for preparing the low-protein natural rubber, the technology provided by the invention is simple in process, convenient to operate and more suitable for large-scale production while achieving an ideal effect.