A compound vulcanization activator and its rubber without nitrosamine release

A technology of vulcanization activator and nitrosamine, applied in the field of rubber additives, can solve the problems of limited use of CLD, poor vulcanization effect, slow vulcanization speed, etc. Effect

Active Publication Date: 2021-12-21
濮阳科茂威新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the long vulcanization time of the sulfur-carrying agent CLD, the use of CLD is limited
Accelerator TMTM (tetramethylthiuram monosulfide), accelerator TMTD (tetramethylthiuram disulfide) and other thiuram accelerators are also widely used in rubber vulcanization, which also produces harmful effects on the human body during the vulcanization process. Harmful and difficult to remove nitrosamines, and thiuram accelerators TiBTD (diisobutyl thiuram disulfide) and TBzTD (tetrabenzyl thiuram disulfide) that release trace or no nitrosamines, because Slow vulcanization speed, poor vulcanization effect and not widely used

Method used

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  • A compound vulcanization activator and its rubber without nitrosamine release
  • A compound vulcanization activator and its rubber without nitrosamine release
  • A compound vulcanization activator and its rubber without nitrosamine release

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A compound vulcanization activator comprises the following components: 9.0% of rubber carrier, 75.0% of urea grease, 13.5% of processing oil and 2.5% of processing aid. In the above formula, the rubber carrier is EPDM rubber, the processing oil is a lipid rubber plasticizer, and the processing aid is aliphatic amine. The preparation method is as follows: the rubber carrier, processing aid, processing oil, and urea grease are industrially mixed, filtered, and granulated according to the above ratio to obtain a composite vulcanization active agent. The industrial mixing refers to general rubber mixing process, including but not limited to internal mixing process or open mixing process.

[0029] A kind of rubber without nitrosamine release, including the following components: raw rubber 100phr, carbon black 80phr, filler 20phr, processing aid 1.0phr, PEG 4000 2.0phr, zinc oxide 4.0phr, sulfur 2.5phr, autumn blue Mu accelerator 0.67phr, vulcanization accelerator MBTS1.25ph...

Embodiment 2

[0031] A compound vulcanization activator comprises the following components: 10.0% of rubber carrier, 70.0% of urea grease, 15.0% of processing oil and 5% of processing aid. In the above formula, the rubber carrier is binary ethylene-propylene rubber, the processing oil is aromatic rubber plasticizer, and the processing aid is fatty acid soap. The preparation method is as follows: the rubber carrier, processing aid, processing oil, and urea grease are industrially mixed, filtered, and granulated according to the above ratio to obtain a composite vulcanization active agent. The industrial mixing refers to general rubber mixing process, including but not limited to internal mixing process or open mixing process.

[0032] A kind of rubber without nitrosamine release, including the following components: raw rubber 100phr, carbon black 80phr, filler 20phr, processing aid 1.0phr, PEG 4000 2.0phr, zinc oxide 4.0phr, sulfur 0.6phr, sulfur loaded agent 1.0phr, thiuram accelerator 0.5...

Embodiment 3

[0034] A compound vulcanization activator comprises the following components: 6.0% of rubber carrier, 80.0% of urea grease, 11.0% of processing oil, and 3% of processing aid. In the above formula, the rubber carrier is EPDM rubber, the processing oil is aromatic rubber plasticizer, and the processing aid is vegetable oil. The preparation method is as follows: the rubber carrier, processing aid, processing oil, and urea grease are industrially mixed, filtered, and granulated according to the above ratio to obtain a composite vulcanization active agent. The industrial mixing refers to general rubber mixing process, including but not limited to internal mixing process or open mixing process.

[0035] A kind of rubber without nitrosamine release, including the following components: raw rubber 100phr, carbon black 60phr, filler 15phr, processing aid 2.0phr, processing oil 5.0phr, PEG 4000 1.0phr, zinc oxide 3.0phr, sulfur 1.0phr, sulfur carrier 2.0phr, thiuram accelerator 1.0phr, ...

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Abstract

The invention discloses a composite vulcanization active agent and rubber without nitrosamine release, belonging to the technical field of rubber additives. The composite vulcanization active agent is composed of the following components in mass percentage: 6.0-10.0% of rubber carrier, 70.0-80.0% of urea grease, 7.0-15.0% of processing oil, 0-5.0% of processing aid, mixed evenly and then kneaded production. The rubber of the present invention includes the following components: raw rubber, carbon black, filler, processing aid, processing oil, PEG 4000, zinc oxide, sulfur, sulfur-carrying agent, thiuram accelerator, vulcanization accelerator MBTS , Compound vulcanization activator. The composite vulcanizing agent of the present invention can improve the vulcanization rate and vulcanization effect while greatly reducing the amount of CLD. The rubber prepared by using the composite vulcanization accelerator has a short vulcanization time, good scorch safety, and no release of nitrosamines. .

Description

technical field [0001] The invention relates to the technical field of rubber additives, in particular to a composite vulcanization activator and rubber without nitrosamine release. Background technique [0002] In the vulcanization molding process of rubber, in addition to adding vulcanizing agents, vulcanization accelerators, and anti-scorch agents, in order to increase the vulcanization speed, it is generally necessary to add vulcanization activators. Vulcanization activators can activate the vulcanization system and increase the crosslinking density of vulcanized rubber. , Improving the aging resistance of vulcanized rubber. During the high-temperature vulcanization process of rubber, some vulcanization accelerators and sulfur-carrying agents will produce secondary amines during the vulcanization process, and nitrogen oxides in the air or in additives will form stable nitrosamines under certain conditions, and nitrosamines Amines are difficult to remove by washing and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08K5/21C08L21/00C08L71/02C08L91/00C08K13/02C08K3/22C08K3/04C08K3/06
CPCC08K5/21C08L21/00C08K2003/2296C08L2205/03C08L71/02C08L91/00C08L23/16C08K13/02C08K3/22C08K3/04C08K3/06
Inventor 甘仲豪
Owner 濮阳科茂威新材料有限公司
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