阅读说明：本技术 一种防止塑料件开裂的橡胶配方 (Rubber formula for preventing plastic part from cracking ) 是由 干乃聪 于 2019-01-07 设计创作，主要内容包括：一种防止塑料件开裂的橡胶配方,属于橡胶制作领域,包括丁腈橡胶100份、硬脂酸1份、氧化锌5份、2,2,4-三甲基-1,2-二氢化喹啉聚合体1份、4.4’-双(α.α-二甲基苄基)二苯胺2份、辛基化二苯胺1份、高定伸炉黑Cabot35份、硅酸铝镁25份、对苯二甲酸二辛酯15份、不溶性硫磺1份、四苄基二硫代秋兰姆0.9份、二苄基二硫代氨基甲酸锌0.5份、N-环已基-2-苯并噻唑次磺酰胺0.5份。本发明提供的防开裂橡胶配方所制造的橡胶在拉伸性有明显提高,空气老化率降低,耐臭氧防开裂,不会使与其配合的塑料件开裂,能广泛应用到空调用轴承座使用的橡胶制品。(A rubber formula for preventing plastic parts from cracking belongs to the field of rubber manufacturing, and comprises 100 parts of nitrile rubber, 1 part of stearic acid, 5 parts of zinc oxide, 1 part of 2, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, 2 parts of 4.4' -bis (α, α -dimethylbenzyl) diphenylamine, 1 part of octylated diphenylamine, 35 parts of high-tensile furnace black Cabot, 25 parts of magnesium aluminum silicate, 15 parts of dioctyl terephthalate, 1 part of insoluble sulfur, 0.9 part of tetrabenzyl thiuram dithiocarbonate, 0.5 part of zinc dibenzyl dithiocarbamate and 0.5 part of N-cyclohexyl-2-benzothiazole sulfonamide.)

1. A rubber formula for preventing plastic parts from cracking is characterized in that main raw materials comprise nitrile rubber, stearic acid, zinc oxide, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, 4' -bis (α, α -dimethylbenzyl) diphenylamine, octylated diphenylamine, high-tensile furnace black Cabot, magnesium aluminum silicate, dioctyl terephthalate, insoluble sulfur, tetrabenzyl dithiothiuram, zinc dibenzyl dithiocarbamate and N-cyclohexyl-2-benzothiazole sulfonamide.

2. The formulation of claim 1, wherein the rubber formulation is for preventing cracking of a plastic part, and further comprises: the consumption (in parts by mass) of each raw material is as follows:

3. the formulation of claim 2, wherein the rubber formulation is selected from the group consisting of: the nitrile rubber uses NBR Nantex 2865, the high-elongation furnace black Cabot uses N-774 carbon black, and the insoluble sulfuric acid uses IS-60.

4. The rubber formulation for preventing cracking of a plastic part according to claim 3, wherein the formulation mixing method comprises the following steps:

step one, adding NBR Nantex 2865 into an internal mixer for mixing for 30 seconds, then adding stearic acid, zinc oxide, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, 4' -bis (α, α -dimethylbenzyl) diphenylamine and octylated diphenylamine for mixing, adding N-774 carbon black and magnesium aluminum silicate for mixing to 110 ℃ when the temperature reaches 90 ℃, lifting a top bolt for cleaning for 1 time in the middle, then adding dioctyl terephthalate for mixing to 150 ℃ for rubber discharge, lifting the top bolt at 120 ℃ and 135 ℃ for one time respectively for 15-30 seconds, mixing into A rubber compound, and standing for later use;

step two: and (3) placing the rubber A in the step one for more than 12 hours, adding a vulcanizing agent IS-60, tetrabenzyl dithiothiuram, dibenzyl dithiocarbamic acid zinc and N-cyclohexyl-2-benzothiazole sulfonamide for vulcanizing, wherein the vulcanizing time IS 3-5 minutes, the vulcanizing temperature IS 17 +/-5 ℃, discharging rubber after vulcanizing, and controlling the discharging temperature within 110 ℃.

Technical Field

The invention belongs to the field of rubber mixing, and particularly relates to a rubber formula for preventing plastic parts from cracking.

Background

The rubber is a high-elasticity polymer material with reversible deformation, is rich in elasticity at room temperature, can generate large deformation under the action of small external force, and can recover the original shape after the external force is removed. The rubber belongs to a completely amorphous polymer, the glass transition temperature of the rubber is low, the molecular weight is often very large and is more than hundreds of thousands, and the early rubber is latex taken from plants such as rubber trees, rubber grasses and the like, and is prepared into a material with elasticity, insulativity, impermeability and air after being processed. Is a high-elasticity polymer compound. The rubber is divided into two types of natural rubber and synthetic rubber, wherein the natural rubber is prepared by extracting colloid from plants such as rubber trees, rubber grasses and the like and then processing the extracted colloid; synthetic rubber is obtained by polymerizing various monomers, and rubber products are widely applied to various aspects of industry or life, but the chemical structure of the rubber is usually damaged, becomes soft or hard and brittle, cracks, rough surface, reduced mechanical property and gradually lost use value along with the lapse of time due to heat, oxygen in air, ozone, sunlight, wind, rain, snow and moisture as well as the erosion of various mechanical stress effects or chemical solvents in the use process, attention needs to be paid to protection in order to prevent or delay the aging tendency of the rubber, the influence of the factors is avoided as much as possible, and an anti-aging agent is added in the process of preparing rubber materials.

In the field of air conditioners, a bearing seat for an air conditioner is usually a rubber product, but the traditional rubber product is aged and cracked, so that the requirement of the bearing seat cannot be better met, and the bearing seat needs to be frequently replaced, and therefore cracking-resistant rubber is needed; the rubber product is connected with the plastic part, and in the actual use process, the problem of cracking of the plastic part can occur.

Disclosure of Invention

In order to overcome the defect that the plastic part is cracked when a rubber product is connected with the plastic part in the prior art, the invention provides a rubber formula for preventing the plastic part from cracking, and the technical problem can be solved.

The invention aims to solve the technical problem by adopting the technical scheme that a rubber formula for preventing plastic parts from cracking is designed, and the main raw materials comprise nitrile rubber, stearic acid, zinc oxide, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, 4' -bis (α, α -dimethylbenzyl) diphenylamine, octylated diphenylamine, high tensile furnace black Cabot, magnesium aluminum silicate, dioctyl terephthalate, insoluble sulfur, tetrabenzyldithiothiuram, zinc dibenzyl dithiocarbamate and N-cyclohexyl-2-benzothiazole sulfonamide.

Preferably, the consumption (parts by weight) of each raw material is as follows:

preferably, the nitrile rubber IS NBR Nantex 2865, the high-elongation furnace black Cabot IS N-774 carbon black, and the insoluble sulfuric acid IS IS-6.

Preferably, the formula mixing method of the rubber formula for preventing the plastic part from cracking comprises the following steps:

step one, adding NBR Nantex 2865 into an internal mixer for mixing for 30 seconds, then adding stearic acid, zinc oxide, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, 4' -bis (α, α -dimethylbenzyl) diphenylamine and octylated diphenylamine for mixing, adding N-774 carbon black and magnesium aluminum silicate for mixing to 110 ℃ when the temperature reaches 90 ℃, lifting a top bolt for cleaning for 1 time in the middle, then adding dioctyl terephthalate for mixing to 150 ℃ for rubber discharge, lifting the top bolt at 120 ℃ and 135 ℃ for one time respectively for 15-30 seconds, mixing into A rubber compound, and standing for later use;

step two: and (3) placing the rubber A in the step one for more than 12 hours, adding a vulcanizing agent IS-60, tetrabenzyl dithiothiuram, dibenzyl dithiocarbamic acid zinc and N-cyclohexyl-2-benzothiazole sulfonamide for vulcanizing, wherein the vulcanizing time IS 3-5 minutes, the vulcanizing temperature IS 17 +/-5 ℃, discharging rubber after vulcanizing, and controlling the discharging temperature within 110 ℃.

The invention has the beneficial effects that:

the rubber prepared by the anti-cracking rubber formula provided by the invention has the advantages of obviously improved stretchability, reduced air aging rate, ozone resistance and cracking resistance, can not crack a plastic part matched with the anti-cracking rubber formula, and can be widely applied to rubber products used for bearing seats for air conditioners.

Detailed Description

A rubber formula for preventing plastic parts from cracking comprises the main raw materials (by mass parts) of nitrile rubber, stearic acid, zinc oxide, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, 4' -bis (α, α -dimethylbenzyl) diphenylamine, octylated diphenylamine, high-tensile furnace black Cabot, magnesium aluminum silicate, dioctyl terephthalate, insoluble sulfur, tetrabenzyl dithiothiuram, zinc dibenzyl dithiocarbamate and N-cyclohexyl-2-benzothiazole sulfonamide.