阅读说明：本技术 一种耐老化氯丁混炼胶及其制备方法 (Ageing-resistant chloroprene rubber compound and preparation method thereof ) 是由 朱树生 孙雯雯 于 2020-07-01 设计创作，主要内容包括：本发明公开了一种耐老化氯丁混炼胶,属于氯丁橡胶的制备领域,其组分包括：氯丁胶100份、氧化镁2-6份、纳米氧化锌5-10份、硬脂酸1-3份、环烷油6-10份、防老剂1-3份、炭黑70-80份、促进剂1-2份、抗疲劳剂PL600：1-5份、改性石墨烯0.5-2份,本发明提高了氯丁橡胶反复弯曲的性能,同时提高其橡胶产品的屈挠性。(The invention discloses an aging-resistant chloroprene rubber compound, which belongs to the field of preparation of chloroprene rubber and comprises the following components: 100 parts of neoprene, 2-6 parts of magnesium oxide, 5-10 parts of nano zinc oxide, 1-3 parts of stearic acid, 6-10 parts of naphthenic oil, 1-3 parts of anti-aging agent, 70-80 parts of carbon black, 1-2 parts of accelerator, and anti-fatigue agent PL 600: 1-5 parts of modified graphene and 0.5-2 parts of modified graphene, the invention improves the repeated bending performance of the chloroprene rubber and improves the flexibility of a rubber product.)

1. An aging-resistant chloroprene rubber compound is characterized by comprising the following components: 100 parts of neoprene, 2-6 parts of magnesium oxide, 5-10 parts of nano zinc oxide, 1-3 parts of stearic acid, 6-10 parts of naphthenic oil, 1-3 parts of anti-aging agent, 70-80 parts of carbon black, 1-2 parts of accelerator, and anti-fatigue agent PL 600: 1-5 parts of modified graphene and 0.5-2 parts of modified graphene.

2. An age-resistant neoprene compound according to claim 1 wherein: the anti-aging agent is one or a mixture of anti-aging agent 4010NA and anti-aging agent RD.

3. An age-resistant neoprene compound according to claim 1 wherein: the modified graphene is graphene modified by a silane coupling agent, the weight ratio of the graphene to the silane coupling agent is 1: 2-3: 5, the dispersed phase of the reaction is 95% ethanol, the reaction temperature is 55-65 ℃, the reaction time is 20-24 hours, and then the graphene is washed to be neutral by absolute ethyl alcohol and deionized water, so that the modified graphene is obtained.

4. A method of preparing an age-resistant neoprene compound as described in claim 1, comprising the steps of:

step S1: adding neoprene into an internal mixer for kneading, adjusting the roller spacing to be 0.5-2mm, setting the kneading temperature to be 50-60 ℃, and after the neoprene is coated on a roller, sequentially adding 2-6 parts of magnesium oxide, 5-10 parts of nano zinc oxide, 1-3 parts of stearic acid, 6-10 parts of naphthenic oil, 1-3 parts of an anti-aging agent, 70-80 parts of carbon black, 1-2 parts of an accelerator and an anti-fatigue agent PL 600: 1-5 parts of modified graphene and 0.5-2 parts of modified graphene until the materials are uniformly mixed;

step S2: after mixing, removing rubber at the temperature of 90-100 ℃, then cutting the rubber on a left cutter and a right cutter for 3-5 times on an open mill, and performing thin-pass triangular bag beating for 6-8 times to discharge the rubber to obtain rubber material;

step S3: and vulcanizing the rubber compound in the step S2, and cooling to obtain a vulcanized rubber compound.

5. The method of preparing an aging-resistant neoprene compound of claim 4, wherein: the naphthenic oil in the step S1 is added in two times on average, and the time interval between the two times of addition is 0.5 min.

6. The method of preparing an aging-resistant neoprene compound of claim 4, wherein: vulcanization conditions in step S3: the temperature is 140 ℃ and the temperature is 170 ℃, the pressure is 6-10Mpa, and the vulcanizing time is 5-10 min.

Technical Field

The invention relates to the field of preparation of chloroprene rubber, and particularly relates to an anti-aging chloroprene mixed rubber and a preparation method thereof.

Background

The chloroprene rubber is a synthetic rubber, and the molecular chain of the chloroprene rubber contains polar chlorine atomic groups, so that double bonds are protected to weaken the activity of the chloroprene rubber, and a polymer has great stability to non-polar substances, so that the chloroprene rubber has better light resistance, heat resistance, aging resistance and other properties than natural rubber, and particularly has more outstanding ozone aging resistance and weather resistance.

At present, chloroprene rubber is widely applied to production and manufacture of special adhesive tapes for agricultural machinery, and comprises industrial belts such as hexagonal belts and narrow V-belts, rubber tracks such as engineering machinery tracks and agricultural machinery tracks, and various cutting V-belts. In actual use, the chloroprene rubber related products can be broken during use due to poor flexibility of the chloroprene rubber.

Disclosure of Invention

The invention aims to provide an aging-resistant chloroprene rubber compound and a preparation method thereof, which can improve the repeated bending performance of chloroprene rubber and improve the flexibility of rubber products.

The technical purpose of the invention is realized by the following technical scheme:

an aging-resistant chloroprene rubber compound comprises the following components: 100 parts of neoprene, 2-6 parts of magnesium oxide, 5-10 parts of nano zinc oxide, 1-3 parts of stearic acid, 6-10 parts of naphthenic oil, 1-3 parts of anti-aging agent, 70-80 parts of carbon black, 1-2 parts of accelerator, and anti-fatigue agent PL 600: 1-5 parts of modified graphene and 0.5-2 parts of modified graphene.

Further, the anti-aging agent is one or a mixture of anti-aging agent 4010NA and anti-aging agent RD.

Further, the modified graphene is graphene modified by a silane coupling agent, the weight ratio of the graphene to the silane coupling agent is 1: 2-3: 5, the dispersed phase of the reaction is 95% ethanol, the reaction temperature is 55-65 ℃, the reaction time is 20-24 hours, and then the modified graphene is washed to be neutral by absolute ethyl alcohol and deionized water, so that the modified graphene is obtained.

Further, the preparation method of the aging-resistant chloroprene rubber compound comprises the following steps:

step S1: adding neoprene into an internal mixer for kneading, adjusting the roller spacing to be 0.5-2mm, setting the kneading temperature to be 50-60 ℃, and after the neoprene is coated on a roller, sequentially adding 2-6 parts of magnesium oxide, 5-10 parts of nano zinc oxide, 1-3 parts of stearic acid, 6-10 parts of naphthenic oil, 1-3 parts of an anti-aging agent, 70-80 parts of carbon black, 1-2 parts of an accelerator and an anti-fatigue agent PL 600: 1-5 parts of modified graphene and 0.5-2 parts of modified graphene until the materials are uniformly mixed;

step S2: after mixing, removing rubber at the temperature of 90-100 ℃, then cutting the rubber on a left cutter and a right cutter for 3-5 times on an open mill, and performing thin-pass triangular bag beating for 6-8 times to discharge the rubber to obtain rubber material;

step S3: and vulcanizing the rubber compound in the step S2, and cooling to obtain a vulcanized rubber compound.

Further, the naphthenic oil in the step S1 is added in two times on average, and the time interval between the two times is 0.5 min.

Further, the vulcanization conditions in step S3 are: the temperature is 140 ℃ and the temperature is 170 ℃, the pressure is 6-10Mpa, and the vulcanizing time is 5-10 min.

In conclusion, the invention has the following beneficial effects:

1. by adding the modified graphene into the components, the KH570 is inserted between the graphene sheets, so that the distance between the modified graphene sheets is increased, the dispersity of the modified graphene is improved, the modified graphene is promoted to be dispersed and coated by a matrix in the mixing process, the modified graphene and the anti-fatigue agent PL600 act together, the mechanical property of the prepared chloroprene rubber compound is effectively improved, and the chloroprene rubber compound is endowed with electric conductivity and heat conductivity.

2. The naphthenic oil is added into the internal mixer twice, and the rubber chain structure contains a benzene ring structure, so that the naphthenic oil and the rubber have good compatibility according to a similar compatibility principle, and the naphthenic oil can be more fully and uniformly mixed with all components.

Detailed Description