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ndbr wet master batch and its preparation method and use
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A technology of wet masterbatch and carbon black, which is applied in transportation and packaging, tire parts, special tires, etc., and can solve the problems of increasing energy costs and production time
Active Publication Date: 2018-06-29
ARLANXEO DEUT GMBH
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[0009] The production of this masterbatch involves intensive mixing of carbon black or another filler with natural rubber or another elastomer, which requires prolonged and relatively vigorous mixing, with the disadvantages of increased energy costs, production time and the occurrence of had a similar problem
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[0095] Production of inventive masterbatch using N231 and Buna CB 22
[0096] A 60 L stirred tank was initially charged with 19 kg of a 9.54% solution of Nd-BR Buna CB22 in industrial hexane at a temperature of 20°C. 1.09 kg of N231 carbon black was initially charged into a 30 L stirred tank, 6 kg of hexane was added, and the mixture was stirred at 700 rpm using a bucket stirrer. The carbon black mixture was then added to the polybutadiene solution while stirring over 2 hours. Subsequently, 90.6 g of TDAE oil and 18 g of molten Vulkanox 4020 stabilizer were added, and the mixture was then stirred for a further 15 min. The solvent is removed by steam distillation in a continuous one-stage stripper. The wet masterbatch was dried to constant mass in a vacuum oven at 60 °C.
example VM and comparative example VM1
[0114] Use this masterbatch to produce vulcanized rubber compounds
[0115] Production was carried out in a 350ml Brabender at 40rpm according to the recipe in Table 2. After mixing for 5 min, the mixture was processed using a roller press, the resulting molten sheet was cut three times on the right and left sides, and the sheet was folded three times.
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PUM
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Abstract
The present invention relates to a NdBR wet masterbatch comprising neodymium-catalyzed polybutadiene with a high proportion of >95% cis-1,4 units and a low proportion of <1% 1,2‑vinyl content, with a narrow polydispersity of less than 3, a Mooney viscosity (ML 1+4 100°C) between 30 and 90 MU, a high Linearity index, and a Mooney relaxation of 2% to 12% after 30 seconds, the latter being prepared by solution polymerization, where the linearity index is the ratio of solution viscosity to Mooney viscosity, at least one carbon black whose iodine absorption A value between 85 and 210 mg / g, determined according to ASTM D1510‑1304, and an oil absorption value between 75 and 150 ml / 100 g, determined according to ASTM D2414, and an oil.
Description
[0001] This application is a divisional application of Chinese Patent Application No. 201280058594.0 entitled "NDBR Wet Masterbatch" with an application date of October 26, 2012. technical field [0002] The present invention relates to NdBR wet masterbatches for the production of vulcanizates with improved rolling resistance, and to their production and use. Background technique [0003] Many products of economic interest are formed from elastomeric compositions by dispersing fillers in a wide variety of different synthetic elastomers, natural rubber or elastomer blends. For example, carbon black is widely used as a reinforcing agent in natural rubber and other elastomers. In order to enable such mixtures to be used in specific fields of application, so-called masterbatches, ie a premixture of fillers, elastomers and various optional additives such as extender oils, are usually produced. [0004] It is generally understood that the properties of carbon black affect the pro...
Claims
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