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2-mercaptoimidazoline-containing masterbatch

A technology of imidazolidinethione and masterbatch, which is applied in the field of masterbatch containing 2-imidazolidinethione, can solve the problems of not being able to obtain CR compounds, and achieve the effects of improving molding pollution and good dispersibility

Inactive Publication Date: 2016-11-02
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when producers make the kneading time for the CR compound longer to make the dispersion state better, a problem arises, and effective CR compounds cannot be obtained because, 2-imidazolidinethione is cross-linked Accelerator while the crosslinking reaction partly occurs during the kneading process

Method used

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  • 2-mercaptoimidazoline-containing masterbatch
  • 2-mercaptoimidazoline-containing masterbatch

Examples

Experimental program
Comparison scheme
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Embodiment

[0032] The present invention will be illustrated by the following examples, but the present invention is not limited to the following examples. The production and evaluation of the masterbatch was carried out, as was the production and evaluation of the CR compound.

[0033]

[0034] As shown in Table 1, master batches were produced by using 40 parts by mass of various binder materials shown below and 60 parts by mass of 2-imidazolidinethione.

[0035] 2-Imidazolidinethione: SANCELER 22C (manufactured by Sanshin Chemical Industry Co., Ltd.)

[0036] Adhesive material:

[0037] (1) Embodiment 1: NBR1 is N240S (produced by JSR company); ML 1+4 The Mooney viscosity (100° C.) was 56 M; the acrylonitrile content (bonded acrylonitrile) was 26% by weight.

[0038] (2) Embodiment 2: NBR2 is N225SH (produced by JSR Company); ML 1+4 The Mooney viscosity (100° C.) was 85 M; the acrylonitrile content (bonded acrylonitrile) was 43% by weight.

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Abstract

Provided is a 2-mercaptoimidazoline-containing masterbatch having exceptional properties for dispersing 2-mercaptoimidazoline in a CR compound, and improved mold staining during molding. In the 2-mercaptoimidazoline-containing masterbatch, nitrile rubber is used as a binder material. A masterbatch containing 50-90 mass% of 2-mercaptoimidazoline and 10-50 mass% of nitrile rubber is preferred.

Description

technical field [0001] The invention relates to a masterbatch containing 2-imidazolidinethione. Background technique [0002] 2-Imidazolidinethione is mainly used as a crosslinking accelerator for chloroprene rubber (hereinafter referred to as "CR"). (For example, see Patent Document 1 and Patent Document 2) When 2-imidazolidinethione is added to a CR compound, the effect worth mentioning is that, while shortening the crosslinking time as a crosslinking accelerator, the crosslinking compound The excellent properties of low permanent compressive strain and high tensile strength are obtained. [0003] On the other hand, in the production process, the CR compound is mixed and produced using a direct vent kneader or a twin-roll kneader according to the application. In such a production process, 2-imidazolidinethione has a high melting point, greater than 190°C, making it difficult to melt during kneading at a normal temperature of 80-150°C for the kneading process. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/22
CPCC08K5/405C08L2310/00C08J3/22C08L9/02C08J2319/00C08K5/378
Inventor 小紫秀人内田贤一
Owner NOK CORP