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Long-acting type rubber antioxidant and preparation method thereof

A rubber antioxidant and anti-aging technology, applied in tire parts, transportation and packaging, special tires, etc., can solve the problems of difficult migration, small molecular weight, insufficient dynamic performance, etc., and achieve the effect of reducing the cost of use

Active Publication Date: 2017-05-31
江苏爱特恩高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Trimers and tetramers have large molecular weights, are not easy to migrate, and have excellent thermo-oxidative aging resistance under static conditions, but insufficient dynamic properties; dimers have good thermo-oxidative aging properties under both dynamic and static conditions, but due to Small molecular weight, with certain mobility

Method used

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  • Long-acting type rubber antioxidant and preparation method thereof
  • Long-acting type rubber antioxidant and preparation method thereof
  • Long-acting type rubber antioxidant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of long-acting type rubber anti-aging agent of the present invention is made up of anti-aging agent RD and N-(1,3-dimethyl) butyl-N'-phenyl-p-quinone diimine that dimer content is 35%, The weight ratio of the two is 30:70.

[0020] The preparation method of long-acting rubber antioxidant of the present invention comprises the following steps:

[0021] ① Add the anti-aging agent RD with a dimer content of 35% into the reaction kettle with stirring, temperature control device, condensing device and nitrogen conduit, heat it to melt, keep the temperature in the kettle at 80°C, and at the speed of 100rpm Stir for 30min;

[0022] ②Keep the temperature in the kettle constant, add N-(1,3-dimethyl)butyl-N'-phenyl-p-quinonediimine, and continue mixing and stirring for 90 minutes under the protection of nitrogen to obtain a semi-finished product;

[0023] ③The semi-finished product is transported to the storage tank under heat preservation, and after falling to a suitabl...

Embodiment 2

[0029] The difference between embodiment 2 and embodiment 1 is:

[0030] A kind of long-acting type rubber anti-aging agent of the present invention is made up of anti-aging agent RD and N-isopropyl-N'-phenyl-p-quinonediimine that dimer content is 50%, and the weight ratio of the two is 70: 30.

[0031] The preparation method of long-acting rubber antioxidant of the present invention comprises the following steps:

[0032] In step ①, add the anti-aging agent RD with a dimer content of 50% into the reaction kettle with stirring, temperature control device, condensing device and nitrogen conduit, heat it to melt, and keep the temperature in the kettle at 120 °C. Stir at 500rpm for 10min;

[0033] In step ②, keep the temperature in the kettle constant, add N-isopropyl-N'-phenyl-p-quinonediimine, and continue mixing and stirring for 30 minutes under the protection of nitrogen to obtain a semi-finished product.

[0034] The physical index of prepared antioxidant is as follows: ...

Embodiment 3

[0039] The difference between embodiment 3 and embodiment 1 is:

[0040] A long-acting rubber antioxidant of the present invention consists of an antioxidant RD with a dimer content of 40%, N-isopropyl-N'-phenyl-p-quinonediimine and N-(1,3-dimethyl base) butyl-N'-phenyl-p-quinonediimine, the weight ratio of the three is 50:25:25.

[0041] The preparation method of long-acting rubber antioxidant of the present invention comprises the following steps:

[0042] In step ①, add the anti-aging agent RD with a dimer content of 40% into the reaction kettle with stirring, temperature control device, condensing device and nitrogen conduit, heat it to melt, and keep the temperature in the kettle at 100 °C. Stir at 400rpm for 20min;

[0043] In step ②, keep the temperature in the kettle constant, add N-isopropyl-N'-phenyl-p-quinonediimine and N-(1,3-dimethyl)butyl-N'-phenyl-p-quinone The quinonediimine was continuously mixed and stirred for 60 minutes under the protection of nitrogen t...

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Abstract

The invention discloses a long-acting type rubber antioxidant and preparation method thereof. The long-acting type rubber antioxidant is prepared from an antioxidant RD and a quinondiimine compound in weight ratio of (30 to 70): (70 to 30). Operation steps for preparing the long-acting type antioxidant are as follows: adding the antioxidant RD in a reaction kettle, heating to fuse the antioxidant RD, maintaining the temperature in the kettle as 80-120 DEG C, stirring for 10-30min under the rotational speed of 100-500rpm; maintaining the invariant temperature in the kettle, adding the quinondiimine compound, continuously mixing and stirring for 30-90min under the nitrogen protection so as to obtain a semi-finished product; and pelletizing through a steel belt cooling pelletizer to obtain the antioxidant finished product. The prepared antioxidant has an excellent thermel oxidation resisting effect and ozone aging resisting effect under the dynamic and static condition, resists water or solvent extraction; the protective effect is durable, and the protective effect is further excellent in decrement using.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to an anti-hot oxygen and anti-ozone aging additive for rubber and a preparation method thereof. Background technique [0002] During the processing, storage and use of rubber, due to the influence of internal and external factors such as external oxygen, ozone, light, ultraviolet rays, radiation, variable-value metals, and environmental pollution and corrosion, aging will occur such as softening, stickiness, hardening, and cracking. Phenomenon. Rubber anti-aging agent is a product that can prevent or delay rubber aging. [0003] Quinoline anti-aging agents have a good protective effect on thermal oxygen aging of rubber, and have a strong inhibitory effect on metal catalytic aging, and have low toxicity. Used in the preparation of various tires, industrial rubber products and cables, etc. Among them, rubber antioxidant RD[ 2, 2, 4-trimethyl-1, 2-dihydroquinolin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/3437C08K5/29C08L7/00C08L91/00C08L91/06C08K13/02C08K3/06C08K3/22C08K5/09B60C1/00
CPCB60C1/0016C08K5/29C08K5/3437C08K2201/014C08L7/00C08L2201/08C08L2205/02C08L2205/03C08L91/00C08L91/06C08K13/02C08K3/06C08K3/22
Inventor 张莉娜方春平
Owner 江苏爱特恩高分子材料有限公司