Ionic liquid modified carbon black-white carbon black double-phase particle filling natural rubber and preparation method thereof

Abstract

The invention relates to ionic liquid modified carbon black-white carbon black double-phase particle filling natural rubber and a preparation method thereof. The rubber comprises the following constituents: natural rubber, vulcanizing agent, ionic liquid, carbon black-white carbon black double-phase particles, zinc oxide, stearic acid, vulcanization accelerator, anti-aging agent and resin. The rubber has excellent stretch resistance and tear resistance performances, good fatigue resistance performance, good abrasive resistance, and good thermo-oxidative aging resistance performance, is low in dissipated heat, can prolong the service life of products during the use, can be applied to various rubber products, and particularly applied to tire tread rubber with high mechanical property requirements and good dynamic mechanical properties.

Description

Technical field

[0001] The invention belongs to the technical field of rubber polymer composite materials, in particular to a modified filler filled natural rubber (NR) vulcanizate and a preparation method thereof. Background technique

[0002] Carbon black-silica dual-phase particles are fillers for rubber containing carbon black and white carbon black (USP 6,709,506). The chemical modification method is adopted to add organic silicon compounds during the carbon black formation process. The carbon black crystallites are embedded with organic silicon atoms. These white carbon blacks not only interfere with the growth of carbon black crystallites, but also increase the defects of the crystallites, thereby changing the surface chemistry of the particles and improving the surface activity of the carbon black. The strength and modulus of pure rubber are very low, and it has practical use value after reinforcement. Traditional reinforcing fillers include carbon black and silica (whi...

Examples

Embodiment 1

[0031] Attached figure 1 , Preparation of ionic liquid modified carbon black-white carbon black dual phase particles (CSDPF) filled natural rubber compound preparation includes the following steps:

[0032] Step 1: Modification of carbon black-silica dual-phase particles: Take 50 parts of carbon black-silica dual-phase particles CSDPF2125 in a beaker, add ethanol, and add ionic liquid (1-methylimidazole) mercapto amber After 0.5 part of acid salt, ultrasonically dispersed for 1h, after cooling, transfer it into a beaker, then use a microporous filter membrane to suction filter, and the filter cake is dried in a vacuum oven at 105°C;

[0033] Step 2: 100 parts of the raw rubber of Malaysia 1# smoked sheet rubber are masticated on two rollers for 15 minutes to obtain the masticated rubber;

[0034] Step 3: Add 1.4 parts of antioxidant RD, 1.4 parts of antioxidant 4010NA, modified carbon black-white carbon black dual phase granule CSDPF 2125 to the internal mixer in the plastified rubb...

Embodiment 2

[0039] The content of ionic liquid modified CSDPF 2125 in the formula of Example 2 is 40 parts, sulfur 2.5 parts, antioxidant RD 1.2 parts, antioxidant 4010NA 1.2 parts, and coumarone resin 4 parts. Other implementation processes are the same as in Example 1. The tensile strength of the obtained vulcanizate was 31.29MPa, the elongation at break was 593%, the tear strength was 122.2KN / m, and the AKRON abrasion volume was 0.210cm 3 , Thermal oxygen aging coefficient 94%, 340,000 times of tensile fatigue fracture; tanδ (70℃) is 0.118, tan δ (0℃) is 0.113.

Embodiment 3

[0041] The formula of Example 3 contains 3 parts of sulfur, 1 part of antioxidant RD, 1 part of antioxidant 4010NA, and 3 parts of coumarone resin. The other implementation process is the same as that of Example 2. The tensile strength of the obtained vulcanizate is 30.22MPa, and it is broken. The elongation is 613%, the tear strength is 115.2 KN / m, and the AKRON abrasion volume is 0.20cm 3 , The thermal oxygen aging coefficient is 92%, the number of tensile fatigue fracture is 380,000 times; tanδ (70℃) is 0.120, tan δ (0℃) is 0.117.

Technical field

[0001] The invention belongs to the technical field of rubber polymer composite materials, in particular to a modified filler filled natural rubber (NR) vulcanizate and a preparation method thereof. Background technique

[0002] Carbon black-silica dual-phase particles are fillers for rubber containing carbon black and white carbon black (USP 6,709,506). The chemical modification method is adopted to add organic silicon compounds during the carbon black formation process. The carbon black crystallites are embedded with organic silicon atoms. These white carbon blacks not only interfere with the growth of carbon black crystallites, but also increase the defects of the crystallites, thereby changing the surface chemistry of the particles and improving the surface activity of the carbon black. The strength and modulus of pure rubber are very low, and it has practical use value after reinforcement. Traditional reinforcing fillers include carbon black and silica (whi...

Examples

Embodiment 1

[0031] Attached figure 1 , Preparation of ionic liquid modified carbon black-white carbon black dual phase particles (CSDPF) filled natural rubber compound preparation includes the following steps:

[0032] Step 1: Modification of carbon black-silica dual-phase particles: Take 50 parts of carbon black-silica dual-phase particles CSDPF2125 in a beaker, add ethanol, and add ionic liquid (1-methylimidazole) mercapto amber After 0.5 part of acid salt, ultrasonically dispersed for 1h, after cooling, transfer it into a beaker, then use a microporous filter membrane to suction filter, and the filter cake is dried in a vacuum oven at 105°C;

[0033] Step 2: 100 parts of the raw rubber of Malaysia 1# smoked sheet rubber are masticated on two rollers for 15 minutes to obtain the masticated rubber;

[0034] Step 3: Add 1.4 parts of antioxidant RD, 1.4 parts of antioxidant 4010NA, modified carbon black-white carbon black dual phase granule CSDPF 2125 to the internal mixer in the plastified rubb...

Embodiment 2

[0039] The content of ionic liquid modified CSDPF 2125 in the formula of Example 2 is 40 parts, sulfur 2.5 parts, antioxidant RD 1.2 parts, antioxidant 4010NA 1.2 parts, and coumarone resin 4 parts. Other implementation processes are the same as in Example 1. The tensile strength of the obtained vulcanizate was 31.29MPa, the elongation at break was 593%, the tear strength was 122.2KN / m, and the AKRON abrasion volume was 0.210cm 3 , Thermal oxygen aging coefficient 94%, 340,000 times of tensile fatigue fracture; tanδ (70℃) is 0.118, tan δ (0℃) is 0.113.

Embodiment 3

[0041] The formula of Example 3 contains 3 parts of sulfur, 1 part of antioxidant RD, 1 part of antioxidant 4010NA, and 3 parts of coumarone resin. The other implementation process is the same as that of Example 2. The tensile strength of the obtained vulcanizate is 30.22MPa, and it is broken. The elongation is 613%, the tear strength is 115.2 KN / m, and the AKRON abrasion volume is 0.20cm 3 , The thermal oxygen aging coefficient is 92%, the number of tensile fatigue fracture is 380,000 times; tanδ (70℃) is 0.120, tan δ (0℃) is 0.117.

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