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Rubber accelerator TMTM predispersion master batch and preparation method thereof

A technology of pre-dispersing masterbatches and rubber accelerators, which is applied in the field of rubber additives and its preparation, which can solve problems such as uneven dispersion and powder flying, and achieve the effects of good fluidity, reduced scrap rate, and simple preparation methods

Active Publication Date: 2015-09-16
NINGBO ACTMIX POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an environmentally friendly rubber accelerator TMTM pre-dispersed masterbatch and its preparation method in view of the problems of uneven dispersion and powder flying in the existing TMTM powder in the rubber mixing process , the masterbatch particles prepared by the method of the present invention can effectively retain the original activity of TMTM, and evenly disperse in the rubber product after the ingredients are mixed, which can ensure the production efficiency and quality of the rubber product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The composition of the rubber accelerator TMTM pre-dispersed masterbatch particles of Example 1 is: 80 parts of tetramethylthiuram monosulfide, 8 parts of EPDM rubber, 2 parts of EVA resin, 1 part of stearic acid, 9 parts of rubber oil Part, 1 part of fatty acid alcohol ester, the preparation method of the masterbatch includes the following steps:

[0018] 1) Preparation of the rubber matrix: First, accurately weigh the EPDM rubber, EVA resin and stearic acid according to the ratio, and mix the EVA resin and stearic acid and divide them into three parts; then, the EPDM rubber Put it into a 75L internal mixer and mix for 2 minutes; then add 1 / 3 of the EVA resin and stearic acid to the internal mixer for 3 minutes; then add 1 / 3 of the internal mixer to the internal mixer EVA resin and stearic acid are mixed until the temperature in the internal mixer rises to 80°C, the remaining 1 / 3 of the EVA resin and stearic acid are added, and the temperature in the internal mixer rises ...

Embodiment 2

[0022] The composition of the rubber accelerator TMTM pre-dispersed masterbatch of Example 2 is: 79 parts of tetramethylthiuram monosulfide, 18 parts of natural rubber, 2 parts of rubber oil, 1 part of fatty acid alcohol ester, preparation of the masterbatch The method includes the following steps:

[0023] 1) Preparation of the rubber matrix: first accurately weigh the natural rubber according to the ratio; then put the natural rubber into a 75L internal mixer, mix for 2 minutes, heat up to 93°C, and discharge the rubber to obtain the rubber matrix compound ;Put the rubber matrix compound on the open mill at room temperature and pass the lower piece of rubber for three times and park it for use;

[0024] 2) Accurately weigh 1 part of tetramethylthiuram monosulfide, rubber oil and fatty acid alcohol ester;

[0025] 3) Add tetramethylthiuram monosulfide, rubber oil, fatty acid alcohol ester together with the prepared rubber matrix into the internal mixer in three batches, mix evenly,...

Embodiment 3

[0027] The composition of the rubber accelerator TMTM pre-dispersed masterbatch particles of Example 3 is: 81 parts of tetramethylthiuram monosulfide, 9 parts of EPDM rubber, 2 parts of EVA resin, 1 part of stearic acid, 6 parts of rubber oil Part, 1 part of fatty acid alcohol ester, the preparation method of the masterbatch includes the following steps:

[0028] 1) Preparation of the rubber matrix: First, accurately weigh the EPDM rubber, EVA resin and stearic acid according to the ratio, and mix the EVA resin and stearic acid and divide them into three parts; then, the EPDM rubber Put it into a 75L internal mixer and mix for 3 minutes; then add 1 / 3 of the EVA resin and stearic acid into the internal mixer for 4 minutes; then add 1 / 3 of the internal mixer EVA resin and stearic acid are mixed until the temperature in the internal mixer rises to 85°C, add the remaining 1 / 3 of the EVA resin and stearic acid, and mix until the temperature in the internal mixer rises to 98°C. Glue t...

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Abstract

The invention discloses a rubber accelerator TMTM predispersion master batch which is composed of the following components in parts by weight: 75-85 parts of tetramethylthiuram monosulfide, 10-20 parts of rubber matrix, 1-10 parts of rubber oil and 1 part of fatty acid alcohol ester. The preparation method is simple and easy to operate. The rubber matrix is previously compounded and prepared to effectively shorten the compounding time required by the subsequent master batch preparation process. The prepared master batch has no impurity or dust, can effectively maintain the original activity of TMTM, does not cake at room temperature, is easy for proportioning and compounding, has the advantages of favorable flowability, no flying dust and high utilization ratio of raw materials, and can not cause skin allergy of operating personnel. The master batch is dispersed uniformly in the rubber product after proportioning and compounding, can ensure the production efficiency and quality of the rubber product, and has important meanings for sustainable development of rubber manufacturing industry.

Description

Technical field [0001] The invention relates to the technical field of rubber additives and their preparation, in particular to a rubber accelerator TMTM pre-dispersed masterbatch particles and a preparation method thereof. Background technique [0002] Tetramethylthiuram monosulfide (ie TMTM) is a yellow powder with a relative density of 1.37-1.40, non-toxic and odorless, soluble in benzene, acetone, dichloroethane, carbon disulfide, toluene, chlorine, slightly soluble in ethanol and ether , Insoluble in gasoline and water. When TMTM is used as an accelerator for natural rubber and synthetic rubber, it has fast vulcanization speed and good scorch safety. It can increase activity when used with alkaline accelerators such as aldehyde amines and guanidines. It is used as a secondary accelerator with sulfenamide and sulfenamide. The combined use of mercaptan accelerators has important technical applications. The uniformity of TMTM dispersion in rubber directly affects the appearan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L7/00C08L23/08C08L91/00C08K5/40C08K5/09C08K5/101B29B7/02B29B9/06B29C47/92B29C48/92
CPCB29B7/002B29B7/02B29B9/06B29C48/92B29C2948/92209C08L7/00C08L23/16C08L2205/03C08L23/0853C08L91/00C08K5/40C08K5/09C08K5/101
Inventor 连千荣
Owner NINGBO ACTMIX POLYMER
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