Rubber composition taking natural rubber/carbon black and synthesized isoprene rubber/white carbon black as rubber master batch and preparation technique thereof

A technology of polyisoprene and rubber composition, used in rubber products and rubber processing, rubber fields, can solve the problems of reducing the combination of filler and rubber, unavoidable, unfavorable to wear resistance, etc.

Inactive Publication Date: 2014-05-07
EVE RUBBER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN1140129A stipulates that the ratio of white carbon black / carbon black is at least 10:1, and the amount of carbon black is small, which is not conducive to wear resistance
These patents all adopt the traditional mixing process. Carbon black / silica and additives are added to the rubber together. Carbon black / silica must inevitably absorb non-rubber components such as additives, which reduces the combination of fillers and rubber. Also reduces wear resistance

Method used

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  • Rubber composition taking natural rubber/carbon black and synthesized isoprene rubber/white carbon black as rubber master batch and preparation technique thereof
  • Rubber composition taking natural rubber/carbon black and synthesized isoprene rubber/white carbon black as rubber master batch and preparation technique thereof
  • Rubber composition taking natural rubber/carbon black and synthesized isoprene rubber/white carbon black as rubber master batch and preparation technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Formula: SMR2050; synthetic polyisoprene rubber IR50; N234 carbon black 25; silica 25; silane coupling agent X50S6; antioxidant RD1.5; antioxidant 40202; protective wax 1; zinc oxide 3; stearic acid 2; sulfur 1; accelerator CZ1.5.

[0058] One stage mixing process:

[0059] Carbon black masterbatch process: add 50 parts by mass of SMR20 to the internal mixer with a rotating speed of 90rpm for 50 seconds, lift up the top bolt, add 17 parts by mass of carbon black N234, lift up the top bolt for cleaning after mixing for 90 seconds, add The remaining 8 parts by mass of carbon black N234 were mixed for 30 seconds, lifted to the top bolt for cleaning, and mixed for 30 seconds to remove the glue; the pressurized mixing time was 200 seconds, and the glue removal temperature was 157°C.

[0060] White carbon black masterbatch process: Add 50 parts by mass of synthetic isoprene IR to an internal mixer with a rotating speed of 90 rpm, lift the top bolt after mixing for 50 seconds...

Embodiment 2

[0076] Formula: 20# standard rubber 40; trans polyisoprene TPI20; cis polyisoprene IR40; N115 carbon black 20; white carbon black 30; silane coupling agent 7.2; antioxidant RD1.5; antioxidant 40202; protective wax 1; zinc oxide 3; stearic acid 2; sulfur 1; accelerator CZ1.5.

[0077] One stage mixing process:

[0078] Carbon black masterbatch process: Add 40 parts by mass of 20# standard rubber to an internal mixer with a rotating speed of 90 rpm, add 13 parts by mass of carbon black N115 after masticating for 50 seconds, lift the top bolt to clean for 80 seconds, add 7 mass parts Part of carbon black N115, kneading for 30 seconds, lifting the top bolt to clean, kneading for 40 seconds to remove glue, pressurized mixing time is 200 seconds, and the temperature of glue removal is 165°C.

[0079] White carbon black masterbatch process: Add 20 parts by mass of trans-polyisoprene and 40 parts by mass of cis-polyisoprene into an internal mixer with a rotating speed of 90 rpm. Aft...

Embodiment 3

[0092] Formula: SMR2060; synthetic polyisoprene rubber IR40; N234 carbon black 30; silica 20; silane coupling agent X50S5; antioxidant RD1.5; antioxidant 40202; protective wax 1; zinc oxide 3; stearic acid 2; sulfur 1; accelerator CZ1.5.

[0093] One stage mixing process:

[0094] Carbon black masterbatch process: Add 60 parts by mass of 20# standard rubber to the internal mixer with a rotating speed of 90 rpm, add 20 parts by mass of carbon black N234 after masticating for 50 seconds, lift the top bolt to clean for 80 seconds, add 10 mass parts 1 part of carbon black N234, mixed for 30 seconds, lifted the top plug to clean, mixed for 40 seconds to remove glue, pressurized mixing time was 200 seconds, and the temperature of glue removal was 157°C.

[0095] White carbon black masterbatch process: Add 40 parts by mass of synthetic trans polyisoprene to the internal mixer with a rotating speed of 90rpm, lift the top bolt after mixing for 50 seconds, add 13 parts by mass of white...

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Abstract

The invention relates to a rubber composition taking natural rubber / carbon black and synthesized isoprene rubber / white carbon black as rubber master batch and a preparation technique thereof. Natural rubber / carbon black and synthesized isoprene rubber / white carbon black are premixed to prepare rubber master batch, and then rubber aids are added according to the composition ratio to prepare rubber compound. The carbon black master batch of the compound is prepared from the following raw materials in parts by weight: 100 parts of natural rubber, 5-120 parts of carbon black, preferentially 20-80 parts of carbon black, the ratio of the natural rubber to the synthesized isoprene rubber is 1:3-5:1, a certain ratio of the carbon black to the white carbon black and a certain ratio of the natural rubber to the synthesized isoprene rubber are kept, and the ratio of the two fillers is consistent with the ratio of the two kinds of rubber. The rubber compound prepared by the preparation technique has the advantages of good abrasive resistance, high elasticity and low heat generation, and can be used in a tire formula and used for other rubber products.

Description

technical field [0001] The invention relates to the field of rubber, in particular to the fields of rubber products and rubber processing. Background technique [0002] The energy loss of rubber during dynamic use is one of its basic characteristics, which is caused by the hysteresis loss of the rubber compound. When the hysteresis loss increases, the energy consumption and heat generation of the rubber compound increase during the dynamic deformation process, which causes the temperature of the rubber compound to rise, which in turn reduces the strength and wear resistance of the compound rubber, causing early damage to tires and other products; more importantly, Increase the rolling resistance of tires, increase fuel consumption (fuel consumption), and increase carbon dioxide emissions. [0003] Numerous studies have shown that the use of reinforcing precipitated silica fillers in formulations can reduce the rolling resistance of tires. Patent CN1539872A proposes a rubbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/00C08K13/02C08K3/04C08K3/36C08K5/548C08K3/22C08K3/06C08K5/18C08K5/3437C08K5/47C08K5/09C08J3/22B29B7/28
CPCB29B7/005B29B7/283B29B7/286C08K2201/006C08L7/00C08L9/00C08L2205/025C08L2205/03C08L2205/035C08K13/02C08K3/04C08K3/36C08K2003/2296C08K5/09C08J3/226C08J2407/00C08J2409/00
Inventor 王梦蛟周宏斌石超
Owner EVE RUBBER RES INST
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