阅读说明：本技术 一种低生热橡胶材料和橡胶履带 (Low-heat-generation rubber material and rubber track ) 是由 李毅 朱鹏霄 陈波 于 2020-07-13 设计创作，主要内容包括：本发明涉及一种低生热橡胶材料,由包含以下成分的原料组合物炼制获得：天然橡胶、丁苯橡胶、稀土顺丁橡胶、硫化促进剂、不溶性硫磺、氧化镁、氧化锌、硬脂酸、防老剂、炭黑、白炭黑、碳纳米管、硅烷偶联剂、防焦剂、增塑剂、阻燃剂和光稳定剂。(The invention relates to a low-heat-generation rubber material which is obtained by refining a raw material composition containing the following components: natural rubber, styrene-butadiene rubber, rare earth butadiene rubber, a vulcanization accelerator, insoluble sulfur, magnesium oxide, zinc oxide, stearic acid, an anti-aging agent, carbon black, white carbon black, carbon nanotubes, a silane coupling agent, an anti-scorching agent, a plasticizer, a flame retardant and a light stabilizer.)

1. A rubber material is refined from a raw material composition containing the following components in parts by weight:

45-55 parts of natural rubber;

18-22 parts of styrene butadiene rubber;

25-35 parts of rare earth butadiene rubber;

0.3-0.7 part of a vulcanization accelerator M;

2-4 parts of insoluble sulfur;

1.3-1.7 parts of magnesium oxide;

2.5-3.5 parts of zinc oxide;

1-2 parts of stearic acid;

0.2-1.7 parts of anti-aging agent DNP;

0.5-1 part of an anti-aging agent MB;

0.3-0.8 part of plasticizer DOP;

carbon black N3305-18 parts;

carbon black N55010-27 shares;

13-17 parts of white carbon black;

4-6 parts of carbon nanotubes;

silane coupling agent CG-Si690.6-1.7 parts;

silane coupling agent CG-Si751.3-2.7 weight portions;

1-2 parts of a scorch retarder PVI;

0.3-0.7 part of antimony trioxide;

2.3-2.8 parts of chlorinated paraffin;

1.5-2.5 parts of light stabilizer BW-10 LD.

2. The rubber material according to claim 1, wherein the white carbon black is a precipitated synthetic amorphous silica powder having an average particle diameter of 200 to 300 μm.

3. The rubber material of claim 1, wherein the carbon nanotubes have an average length of 3-10 μ ι η.

4. The rubber material according to claim 1, wherein the total part of the natural rubber, the styrene-butadiene rubber and the rare earth butadiene rubber is 95 to 105 parts.

5. The rubber material according to claim 1, wherein the total part of the antioxidant DNP and the antioxidant MB is 1.5 to 2.5 parts.

6. The rubber material according to claim 1, wherein the total part of carbon black N330 and carbon black N550 is 28 to 32 parts.

7. The rubber material according to claim 1, wherein the total part of the silane coupling agents CG-Si69 and CG-Si75 is 2.5 to 3.5 parts.

8. The rubber material according to claim 1, wherein the total part of the antimony trioxide and the chlorinated paraffin is 2.5 to 3.5 parts.

9. The rubber material of claim 1, wherein the feedstock composition comprises:

50 parts of natural rubber;

20 parts of styrene butadiene rubber;

30 parts of rare earth butadiene rubber;

0.5 part of vulcanization accelerator M;

3 parts of insoluble sulfur;

1.5 parts of magnesium oxide;

3 parts of zinc oxide;

1.5 parts of stearic acid;

1.2 parts of an anti-aging agent DNP;

0.8 part of an anti-aging agent MB;

0.5 part of plasticizer DOP;

carbon black N33012 parts;

carbon black N55018 parts

White carbon black 1115MP 15 parts;

5 parts of carbon nano tubes;

silane coupling agent CG-Si 691 parts

752 parts of silane coupling agent CG-Si;

1 part of scorch retarder PVI;

0.5 part of antimony trioxide;

2.5 parts of chlorinated paraffin

Light stabilizer BW-10LD 2 parts.

10. The rubber material according to any one of claims 1 to 9, which has the following characteristics:

the HS value of the rubber hardness is 75-78;

the tensile strength value is 25-26.7 MPa;

the compression set value is 2.6-3%;

the compression heat generation value is 28.6-30 ℃; and

the aclar abrasion value is 0.2-0.24 cm³/1.61km。

11. A rubber crawler comprising the rubber material according to any one of claims 1 to 10.

12. A method for preparing the rubber material according to any one of claims 1 to 10, comprising the steps of:

(1) providing a feedstock composition according to any one of claims 1 to 10;

(2) uniformly mixing magnesium oxide, zinc oxide, stearic acid and scorch retarder PVI;

(3) adding natural rubber, butadiene styrene rubber, rare earth butadiene rubber and white carbon black into an open mill for plastication, and then adding the ingredients in the step (2) for plastication;

(4) mixing the product obtained in the step (3) with a silane coupling agent CG-Si69, a silane coupling agent CG-Si75, antimony trioxide, chlorinated paraffin and a light stabilizer BW-10LD for first mixing;

(5) adding insoluble sulfur, carbon black N330, carbon black N550, carbon nano tubes, antioxidant DNP, antioxidant MB and plasticizer DOP into the product obtained in the step (4) for second mixing; after the second mixing is finished, adding an accelerant M into the rubber for final mixing;

(6) turning over the product in the last step to uniformly disperse the crude rubber and the compounding agent;

(7) and (5) discharging the product obtained in the previous step.

13. The method according to claim 12, wherein in the step (3), after the plastication is finished, the product is cooled and stored for 14-16 hours.

14. The method of claim 12, wherein in step (3), the ratio of the front and rear rolls of the mill is 1: 1.1 to 1.3, and adjusting the roller spacing to 0.8 to 1 mm.

15. The method according to claim 12, wherein in the step (4), after the first mixing is completed, the product is cooled and left for 8-12 hours.

Technical Field

The invention relates to the field of materials, in particular to a low-heat-generation rubber material and a rubber track.

Background

Rubber tracks have found widespread use in tracked vehicles, particularly in construction, agricultural, military and equipment applications. With the development of industrialization, people have higher and higher requirements on rubber tracks, and the rubber tracks are developing towards diversification of types and complete specifications.

The most important advantage of rubber tracks over metal tracks is their high speed of travel. However, an important problem associated with the high driving speed is that the rubber track generates heat seriously, but the heat conductivity of the rubber is poor, so that the heat cannot be removed in time, a large amount of heat is accumulated on the rubber track, thereby causing temperature rise, causing heat damage to the rubber track, accelerating aging speed and reducing mechanical property, and if the temperature is too high, the molecular chain of the rubber can be degraded, and early damage can occur. Generally, the temperature of the track is reduced by stopping construction during use, but the use efficiency of the rubber track is greatly influenced.

Disclosure of Invention

The inventors have found that to obtain a rubber track with a long service life, it is necessary to provide a rubber material with low heat buildup and good mechanical properties.

The present disclosure provides a rubber material having significantly improved overall properties, particularly while having higher tensile strength values, moderate rubber hardness values, lower compression set values, compression calorific values, and aclar abrasion values. Compared with the rubber material of the prior similar system, the rubber material of the present disclosure has the index improvement amount of more than 5 percent, and the partial index improvement amount is about 20 percent, and the improvement of the technical effect is unexpected by the technical personnel in the field.

In some aspects, a rubber material is provided, which is refined from a raw material composition comprising the following components, wherein the raw material composition comprises the following components in parts by weight:

45-55 parts of natural rubber; (e.g., 48 to 52 parts)

18-22 parts of styrene butadiene rubber; (for example, 19 to 21 parts)

25-35 parts of rare earth butadiene rubber; (e.g., 28 to 32 parts)

0.3-0.7 part of a vulcanization accelerator M; (e.g., 0.4 to 0.6 parts)

2-4 parts of insoluble sulfur; (e.g., 2.8 to 3.2 parts)

1.3-1.7 parts of magnesium oxide; (e.g., 1.4 to 1.6 parts)

2.5-3.5 parts of zinc oxide; (e.g., 1.8 to 2.2 parts)

1-2 parts of stearic acid; (e.g., 1.4 to 1.6 parts)

0.2-1.7 parts of anti-aging agent DNP; (e.g., 1.1 to 1.3 parts)

0.5-1 part of an anti-aging agent MB; (e.g., 0.7 to 0.9 parts)

0.3-0.8 part of plasticizer DOP; (e.g., 0.4 to 0.6 parts)

Carbon black N3305-18 parts; (e.g., 11 to 13 parts)

Carbon black N55010-27 shares; (for example, 17 to 19 parts)

13-17 parts of white carbon black; (preferably white carbon 1115MP)

4-6 parts of carbon nanotubes;

silane coupling agent CG-Si690.6-1.7 parts; (e.g., 0.8 to 1.2 parts)

Silane coupling agent CG-Si751.3-2.7 weight portions; (e.g., 1.8 to 2.2 parts)

1-2 parts of a scorch retarder PVI;

0.3-0.7 parts (e.g., 0.5 parts) of antimony trioxide;

2.3-2.8 parts (e.g., 2.5 parts) of chlorinated paraffin;

1.5-2.5 parts of light stabilizer BW-10 LD. (e.g., 1.8 to 2.2 parts)

In some embodiments, the white carbon black is precipitated synthetic amorphous silica powder with an average particle size of 200-300 μm.

In some embodiments, the carbon nanotubes have an average length of 3 to 10 μm.

In some embodiments, the total parts of natural rubber, styrene butadiene rubber, and rare earth butadiene rubber is 95 to 105 parts.

In some embodiments, the total parts of the antioxidant DNP and the antioxidant MB is 1.5 to 2.5 parts.

In some embodiments, the total parts of carbon black N330 and carbon black N550 is 28 to 32 parts.

In some embodiments, the total parts of the silane coupling agents CG-Si69 and CG-Si75 is 2.5 to 3.5 parts.

In some embodiments, the total parts of antimony trioxide and chlorinated paraffin is 2.5 to 3.5 parts.

In some embodiments, the feedstock composition comprises:

50 parts of natural rubber;

20 parts of styrene butadiene rubber;

30 parts of rare earth butadiene rubber;

0.5 part of vulcanization accelerator M;

3 parts of insoluble sulfur;

1.5 parts of magnesium oxide;

3 parts of zinc oxide;

1.5 parts of stearic acid;

1.2 parts of an anti-aging agent DNP;

0.8 part of an anti-aging agent MB;

0.5 part of plasticizer DOP;

carbon black N33012 parts;

carbon black N55018 parts

White carbon black 1115MP 15 parts;

5 parts of carbon nano tubes;

silane coupling agent CG-Si 691 parts

752 parts of silane coupling agent CG-Si;

1 part of scorch retarder PVI;

0.5 part of antimony trioxide;

2.5 parts of chlorinated paraffin

Light stabilizer BW-10LD 2 parts.

In some embodiments, the rubber material has the following characteristics:

the HS value of the rubber hardness is 75-78;

the tensile strength value is 25-26.7 MPa;

the compression set value is 2.6-3%;

the compression heat generation value is 28.6-30 ℃; and

the aclar abrasion value is 0.2-0.24 cm³/1.61km。

In some aspects, the present disclosure provides a rubber track comprising the rubber material of any of the above.

In some aspects, the present disclosure provides a method of making the rubber material of any one of the above claims, comprising the steps of:

(1) providing a feedstock composition according to any one of the preceding claims;

(2) uniformly mixing magnesium oxide, zinc oxide, stearic acid and scorch retarder PVI;

(3) adding natural rubber, butadiene styrene rubber, rare earth butadiene rubber and white carbon black into an open mill for plastication, and then adding the ingredients in the step (2) for plastication;

(4) mixing the product obtained in the step (3) with a silane coupling agent CG-Si69, a silane coupling agent CG-Si75, antimony trioxide, chlorinated paraffin and a light stabilizer BW-10LD for first mixing;

(5) adding insoluble sulfur, carbon black N330, carbon black N550, carbon nano tubes, antioxidant DNP, antioxidant MB and plasticizer DOP into the product obtained in the step (4) for second mixing; after the second mixing is finished, adding an accelerant M into the rubber for final mixing;

(6) turning over the product in the last step to uniformly disperse the crude rubber and the compounding agent;

(7) and (5) discharging the product obtained in the previous step.

In some embodiments, in step (3), after the plastication is completed, the product is cooled and stored for 14-16 hours.

In some embodiments, in step (3), the ratio of the front and back rolls of the mill is 1: 1.1 to 1.3, and adjusting the roller spacing to 0.8 to 1 mm.

In some embodiments, in step (4), after the first mixing is completed, the product is cooled and left for 8 to 12 hours.

In some embodiments, the hardness is according to GB/T531.1-2008 vulcanized rubber or thermoplastic rubber indentation hardness test method part 1: shore Durometer (Shore hardness) measurements.

In some embodiments, tensile strength and elongation at break are determined according to GB/T528-2009 vulcanizate or thermoplastic rubber tensile stress strain property determinations.

In some embodiments, compression set and compression heat generation are determined according to GB/T1687.3-2016 vulcanized rubber temperature rise and fatigue resistance in flex tests part 3: compression deflection test (constant strain type).

In some embodiments, aclar abrasion is determined according to GB/T1689-2014 vulcanizate abrasion resistance measurements (using an Acron abrasion tester).

Description of terms:

if the following terms are used in the present invention, they may have the following meanings:

various relative terms such as "front," "back," "top," and "bottom," "upper," "lower," "above," "below," and the like may be used to facilitate description of various embodiments. Relative terms are defined with respect to conventional orientations of the structure and do not necessarily indicate an actual orientation of the structure at the time of manufacture or use. The following detailed description is, therefore, not to be taken in a limiting sense. As used in the description and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.

The content means a content of more than 0%, for example, 1% or more, 10% or more, for example, 20% or more, for example, 30% or more, for example, 40% or more, for example, 50% or more, for example, 60% or more, for example, 70% or more, for example, 80% or more, for example, 90% or more, for example, 100%. When the content is 100%, the meaning of "containing" is equivalent to "consisting of …".

Unless otherwise specified,% means% by weight, and parts means parts by weight.

The term "natural rubber" refers to naturally occurring rubbers, such as rubbers that can be harvested from sources such as hevea rubber tree sources and non-hevea rubber tree sources (e.g., guayule shrubs and dandelion).

The term "styrene-butadiene rubber" refers to a high polymer elastomer obtained by copolymerizing styrene and 1, 3-butadiene monomers.

The term "butadiene rubber" refers to a high cis-butadiene polymer elastomer obtained by coordination polymerization of 1, 3-butadiene as a monomer. Butadiene can be polymerized by free radical, anionic or coordinated anionic polymerization to produce polybutadiene rubber.

The term "rare earth butadiene rubber" refers to butadiene rubber obtained by solution polymerization of butadiene using rare earth metals, alloys or compounds as catalysts.

Advantageous effects

One or more technical schemes of the present disclosure have one or more of the following beneficial effects:

1) the heat generation is low;

2) the hardness is moderate;

3) the tensile strength is better;

4) the compression set is low;

5) aclar abrasion was low.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.

The following examples and comparative examples used the following feed parameters as shown in table 1 below:

TABLE 1