Acid and alkali resistant rubber boot vamp rubber compound and preparation method thereof

A technology of compound rubber and acid and alkali resistance, which is applied in the fields of application, clothing, footwear, etc., can solve the problems of large drop in tearing strength, loss of wearing function, and drop in physical and chemical indicators, so as to improve flex resistance and improve Effects of chemical resistance, improvement of elasticity and flex resistance

Active Publication Date: 2013-10-02

JIHUA 3539 SHOE MAKING

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AI-Extracted Technical Summary

Problems solved by technology

However, the physical and chemical indicators of ordinary acid and alkali-resistant work boots available in the market have dropped greatly after being soaked in chemical agents, so the service life of this type of work boots is generally low, and their average service life is within 4 months.

Mainly reflected in the large change...

Method used

In above-mentioned embodiment, the stearic acid that adds in the mixture I mainly is to use (not simple vulcanization active agent) as tensio-active agent, facilitates promotor, powders such as sulfur (especially promotor) in rubber compound The material is dispersed evenly, the efficiency of vulcanization operation is improved, the uniformity of the compounded rubber after vulcanization is improved, and the stability of each batch of rubber is guaranteed. T...

Abstract

The invention discloses an acid and alkali resistant rubber boot vamp rubber compound comprising Chinese No. 1 smoked sheet, butadiene styrene rubber, an accelerant, sulfur, active zinc oxide, stearic acid, an anti-aging agent, high-abrasion furnace black, general carbon black, barium sulfate, a softening agent and a tackifier. A sizing material of the rubber compound prepared by the preparation method has excellent comprehensive indexes such as high strength, good elongation and good flexing resistance; and the sizing material has small physical and mechanical properties on the basis of meeting the acid-base resistance property, and can meet special requirements of an operating environment. The non-split flexing resistance test of finished-product protective boot made of the mixing rubber in a laboratory shows that the flex times of the protective boots is greater than or equal to 3,200,000, and much higher than that of the common acid and alkali resistant rubber boots sold in the market at present while changes of the hardness, the tensile strength and the elongation at rupture of the sizing material soaked by a chemical agent, and the weigh change are small at the same time; and the acid-base resistance property and the resistance to chemical corrosion of the sizing material are good; the sizing material can effectively resist a poor operating condition of a working space on the basis of meeting the acid-base resistance property; and the service life of the finished-product protective boots made of the sizing material can be up to over six months and is prolonged by over 50% in comparison with that of the ordinary commercial product sold in the market under the identical condition.

Application Domain

Footwear

Technology Topic

Composite indicatorButadiene-styrene rubber +20

Image

Examples

Experimental program(6)

Example Embodiment

[0028] The preparation method of the compound rubber for acid and alkali resistant rubber boots in this embodiment includes the following steps:

[0029] a. Breaking glue: Break the domestic No. 1 smoked glue and styrene-butadiene rubber into domestic No. 1 smoked glue and styrene-butadiene rubber respectively by weight;

[0030] b. Plasticizing: Put the domestic No. 1 smoked glue filament into an open mill with a roll temperature of 40℃~50℃ and a roll pitch of 0.5~1.0mm after the first thin pass plasticizing, the roll pitch is 5mm-8mm The open mill is wrapped with rollers for plastic smelting, and the styrene-butadiene rubber blocks are mixed and mixed to form a compounded film. Then the finished compounded film is put into the open mill with a roll distance of 0.5~1.0mm through the second thinning After plasticizing, put it into an open mill with a roll distance of 5mm-8mm to plasticize, place a test sample, then make a film, leave it for more than 8 hours, and make a plasticized film, ready for use; use a plasticizer to plasticize The rubber samples are tested, and the mastication plasticity (Wicker's plasticity) of the plasticized rubber should be between 0.34 and 0.42;

[0031] c. Ingredients: After passing the accelerator and sulfur through a screen of 60 meshes, the accelerator, sulfur, and 0.1 part of stearic acid are mixed by weight to prepare mixture I; the active zinc oxide and remaining stearin are mixed by weight Mix acid and antioxidant to make mixture Ⅱ;

[0032] d. Mixing: Put the plasticized film in step b into the internal mixer for plasticizing for 25-35s, then put it into the mixture II, after pressing for 25-35s, put it into general carbon black, barium sulfate, tackifier and add it to the softener A kind of post-compacting for 35~45s, then put in the high wear-resistant carbon black and add another softener, and then press for 45~60 seconds, then lift the top bolt and turn and discharge until the roll pitch is 8~ In a 10mm tablet press, tumbling, unloading, cooling, and standing for more than 12 hours to prepare a rubber compound, ready for use;

[0033] e. Filtration and vulcanization: Put the rubber compound prepared in step d into an open mill with a roll distance of 5-8mm, heat it and smelt it, then filter and remove impurities, and cool to 40℃~80℃;

[0034] f. Put the filtered rubber after cooling in step e into an open mill with a roller pitch of 8mm-10mm. The rubber material wraps the rollers and cuts the knife, and then adds the mixture I. After mixing evenly, test the sample to obtain the mixture Refining rubber.

[0035] In this embodiment, in step b, the first thin pass is 4 times, and the second thin pass is 2 times.

[0036] In this embodiment, in step d, the softener added first is pine tar, and the softener added later is liquid coumarone; it is mixed on the internal mixer for 3 to 4 times and then discharged into the tablet press. The turning time is 50-60 seconds, and the discharging temperature is 110-120°C; it is turned on the tablet press for 3 to 4 times and then the tablets are released.

[0037] In this embodiment, in step e, the rubber material is wrapped with a roller and the knife is cut 3 to 4 times, and the next piece is sent to the extruder to pass through a five-layer filter screen. The first layer of the screen after the orifice is 7 mesh, and the second Layer 18 mesh, third layer 60 mesh, fourth layer 18 mesh, fifth layer 7 mesh.

Example Embodiment

[0038] Example one

[0039] In the compounding rubber for acid and alkali resistant rubber boots in this embodiment, the raw materials of the compounding rubber include the following components by weight: 85 parts of domestic No. 1 smoked rubber, 15 parts of styrene butadiene rubber, 2.5 parts of accelerator, 2.5 parts of sulfur, and active 2.2 parts of zinc oxide, 0.6 parts of stearic acid, 3.2 parts of antioxidant, 40 parts of high wear-resistant carbon black, 15 parts of general-purpose carbon black, 20 parts of barium sulfate, 11 parts of softener, 2 parts of RX-80 resin.

[0040] In this embodiment, the accelerator is a mixture of accelerator DM and accelerator D, wherein the amount of accelerator DM is 4 times the amount of accelerator D.

[0041] In this embodiment, the antioxidant is a mixture of antioxidant MB, antioxidant 4010NA, and paraffin wax, and the weight ratio of the antioxidant MB, antioxidant 4010NA and paraffin wax is 1:1.5:1.5.

[0042] In this embodiment, the softener is liquid coumarone and pine tar, wherein the amount of the liquid coumarone is twice the amount of pine tar.

[0043] The preparation method of the compound rubber for acid and alkali resistant rubber boots in this embodiment includes the following steps:

[0044] a. Breaking glue: Cut the domestic No. 1 smoked glue and styrene-butadiene rubber (1500) into small triangular pieces, adjust the roller pitch of the breaker to 5mm-8mm, and put them into the cut domestic No. 1 smoked glue blocks, The styrene-butadiene rubber (1500) rubber block, after the smoked rubber is broken into rubber filaments, and the styrene-butadiene rubber is broken into rubber blocks, it is sent to the open mill for plastication;

[0045] b. Plasticizing: Turn on the cooling water to control the roll temperature at 40℃~50℃, adjust the roll distance of the mill to 0.5~1.0mm, put in the domestic No. 1 smoked glue wire, carry out thin pass plasticizing, thin pass When using a fan to cool the rubber material, after 4 times of thin pass, the roll distance is relaxed to 5mm-8mm, put in the domestic No. 1 smoked glue of the thin pass and wrap the roller, and then break the soft styrene butadiene rubber into a rubber block ( 1500) Put the styrene-butadiene rubber (1500) into the domestic No. 1 smoked glue, cut the left and right knife twice to make a film, and then adjust the roller pitch of the open mill to 0.5~1.0mm. Pass the film through 2 times again. After the film pass is over, relax the roller pitch to 5mm-8mm, put in the mixed rubber and wrap the roller, wait for the mixed rubber to be smooth and flat, place the test sample, and then put the mixed rubber into a film and place it The time is more than 8 hours; use a plasticity machine to test the plastified rubber samples, and the plastification plasticity (Wicker plasticity) of the plastified rubber should be between 0.34 and 0.42;

[0046] c. Ingredients: After passing the accelerator and sulfur through a 60-mesh screen, the accelerator, sulfur and 0.1 part of stearic acid are mixed uniformly by weight to prepare mixture I and put it into a container for later use; After the active zinc oxide, the remaining 0.5 parts of stearic acid, and the antioxidant are mixed uniformly, the mixture II is prepared and put into a low melting point plastic refining bag; in addition, the high wear-resistant carbon black, general carbon black, and sulfuric acid The barium and the tackifier are put into a low melting point plastic bag, and the softener is put into different containers for use.

[0047] d. Mixing: start the internal mixer, put in the mixed film that has been plasticized in step b, and then feed it in the following order after 30 seconds of plasticization: put in active zinc oxide, stearic acid (0.5 parts), and antioxidant The low-melting plastic bag (mixture II) is pressed for 30 seconds, put into a low-melting plastic bag filled with universal carbon black, a low-melting plastic bag filled with barium sulfate, a low-melting plastic bag filled with a tackifier, and added After pine tar is pressed for 40 seconds, put it into a low melting point plastic bag filled with high wear-resistant carbon black, and add liquid coumarone at the same time, then press for 50 seconds, and then tumble 4 times, each time for 50-60 seconds , The total mixing time is about 7min, discharge to the open mill, the discharge temperature is controlled at 110-120℃, the roll distance of the tablet press is controlled to 8~10mm, and the tablet is discharged after 4 times on the tablet press , Cool, put it for more than 12 hours, set aside.

[0048] e. Filtration: Adjust the roller pitch of the open mill to 5-8mm, and then put the mixed rubber placed in step d into the open mill for heat mixing, and the rubber material is wrapped with a knife after the roll 3 times-4 times, and the film is removed; Then send the hot-mixed rubber strips to the rubber strainer and pass through five layers of filters (the first layer of 7 meshes, the second layer of 18 meshes, the third layer of 60 meshes, the fourth layer of 18 meshes, and the fifth layer of 7 meshes. Mesh), after removing impurities, cut with steel wire, weigh, and wait for the film to cool to 40℃~80℃.

[0049] f. Vulcanization: Put the filtered rubber after cooling in step e into an open mill with a roller pitch of 8-10mm. After the rubber wraps the rollers, the left and right cutters are twice each, and then add the booster weighed according to the formula. Powder materials such as sulphur, sulphur, stearic acid (0.1 part) (mixture Ⅰ), cut the knife 3 times left and right after the powder is eaten up, hit the triangle bag 4 times, turn the test sample evenly, and then cool down and air Dry and get the product.

[0050] Use a plasticity machine to test the mixed samples. The mixing plasticity (Wicker's plasticity) of the compound should be between 0.22 and 0.30.

[0051] Performance testing indicators:

[0052] 1: Physical and mechanical properties before chemical soaking treatment:

[0053]

[0054] 2: 3.7mol/L H at 23℃ 2 SO 4 Changes in physical and mechanical properties after immersion for 72 hours:

[0055] Hardness (Shore A) increased

[0056] 3: Changes in physical and mechanical properties after immersion in 6.0mol/L HCl at 23°C for 72 hours:

[0057] Hardness (Shore A) increased

[0058] 4: Changes in physical and mechanical properties after immersion in 6.1mol/L NaOH for 72 hours at 23°C:

[0059] Hardness (Shore A) increased

Example Embodiment

[0060] Example two

[0061] The raw materials of the rubber compound include the following components in parts by weight: 80 parts of domestic No. 1 smoked gum, 20 parts of styrene butadiene rubber, 2.5 parts of accelerator, 2.5 parts of sulfur, 2 parts of active zinc oxide, 0.8 parts of stearic acid, 2.6 parts of antioxidant Parts, 30.5 parts of high wear-resistant carbon black, 15 parts of general-purpose carbon black, 15 parts of barium sulfate, 9 parts of softener, 1 part of RX-80 resin.

[0062] In this embodiment, the accelerator is a mixture of accelerator DM and accelerator D, wherein the amount of accelerator DM is 4.5 times the amount of accelerator D.

[0063] In this embodiment, the antioxidant is a mixture of antioxidant MB, antioxidant 4010NA, and paraffin wax, and the weight ratio of the antioxidant MB, antioxidant 4010NA and paraffin wax is 1:1.5:1.5.

[0064] In this embodiment, the softener is liquid coumarone and pine tar, wherein the amount of the liquid coumarone is 2.5 times the amount of pine tar.

[0065] The preparation method of the compound rubber for acid and alkali resistant rubber boots in this embodiment includes the following steps:

[0066] a. Breaking glue: Cut the domestic No. 1 smoked glue and styrene-butadiene rubber (1500) into small triangular pieces, adjust the roller pitch of the breaker to 5mm-8mm, and put them into the cut domestic No. 1 smoked glue blocks, The styrene-butadiene rubber (1500) rubber block, after the smoked rubber is broken into rubber filaments, and the styrene-butadiene rubber is broken into rubber blocks, it is sent to the open mill for plastication;

[0067] b. Plasticizing: Turn on the cooling water to control the roll temperature at 40℃~50℃, adjust the roll distance of the mill to 0.5~1.0mm, put in the domestic No. 1 smoked glue wire, carry out thin pass plasticizing, thin pass When using a fan to cool the rubber material, after 4 times of thin pass, the roll distance is relaxed to 5mm-8mm, put in the domestic No. 1 smoked glue of the thin pass and wrap the roller, and then break the soft styrene butadiene rubber into a rubber block ( 1500) Put the styrene-butadiene rubber (1500) into the domestic No. 1 smoked glue, cut the left and right knife twice to make a film, and then adjust the roller pitch of the open mill to 0.5~1.0mm. Pass the film through 2 times again. After the film pass is over, relax the roller pitch to 5mm-8mm, put in the mixed rubber and wrap the roller, wait for the mixed rubber to be smooth and flat, place the test sample, and then put the mixed rubber into a film and place it More than 8 hours; use a plasticity machine to test the plastified rubber samples, and the plastification plasticity (Wicker plasticity) test of the plastified rubber should be between 0.34 and 0.42;

[0068] c. According to parts by weight, pass the accelerator and sulfur through a 60-mesh screen and mix with 0.1 part of stearic acid uniformly to prepare mixture I and put it into a container for use; according to parts by weight, add active zinc oxide and the remaining 0.7 After mixing two parts of stearic acid and anti-aging agent evenly, the mixture II is prepared and put into a low melting point plastic refining bag; in addition, high wear-resistant carbon black, general carbon black, barium sulfate, and tackifier Put it into a low melting point plastic bag, and put the softener into different containers for use.

[0069] d. Mixing: start the internal mixer, put in the mixed film that has been plasticized in step b, and then feed it in the following order after 25s of plasticization: put in active zinc oxide, stearic acid (0.7 parts), and antioxidant The low-melting plastic bag (mixture II) is pressed for 25 seconds, put into a low-melting plastic bag with universal carbon black, a low-melting plastic bag with barium sulfate, a low-melting plastic bag with a tackifier, and add After the pine tar is pressed for 35 seconds, put it into a low melting point plastic bag containing high wear-resistant carbon black, and add liquid coumarone at the same time, then press for 45 seconds, and then tumble 4 times, each time 45 seconds, mixing The total refining time is about 5 minutes, and the discharge to the open mill, the discharge temperature is controlled at 110-120℃, and the roll distance of the tablet press is controlled to 8-10mm. After 4 times of tumbling on the tablet press, the tablets are discharged and cooled. , Place for more than 12 hours, stand by.

[0070] e. Filtration: Adjust the roller pitch of the open mill to 5-8mm, and then put the mixed rubber placed in step d into the open mill for heat mixing. The rubber material is wrapped with a roller and the knife is cut 3 times, then the sheet is removed; The rubber strips are sent to the rubber strainer and passed through five layers of filter screens (the first layer of 7 meshes, the second layer of 18 meshes, the third layer of 60 meshes, the fourth layer of 18 meshes, and the fifth layer of 7 meshes), After removing impurities, cut with steel wire, weigh, and wait for the film to cool to 40°C.

[0071] f. Vulcanization: Put the filtered rubber after cooling in step e into an open mill with a roller pitch of 8-10mm. After the rubber wraps the rollers, the left and right cutters are twice each, and then add the booster weighed according to the formula. Reagent, sulphur, stearic acid (0.1 part) powder (mixture I), cut the knife 2 times left and right after the powder is eaten up, hit the triangle bag 3 times, turn the sample evenly, and then cool the next piece and dry it. , Get the product.

[0072] Use a plasticity machine to test the mixed samples. The mixing plasticity (Wicker's plasticity) of the compound should be between 0.22 and 0.30.

[0073] Performance testing indicators:

[0074] 1: Physical and mechanical properties before chemical soaking treatment:

[0075]

[0076] 2: 3.7mol/L H at 23℃ 2 SO 4 Changes in physical and mechanical properties after immersion for 72 hours:

[0077] Hardness (Shore A) increased

[0078] 3: Changes in physical and mechanical properties after immersion in 6.0mol/L HCl at 23°C for 72 hours:

[0079] Hardness (Shore A) increased

[0080] 4: Changes in physical and mechanical properties after immersion in 6.1mol/L NaOH for 72 hours at 23°C:

[0081] Hardness (Shore A) increased

PUM

Property	Measurement	Unit
Particle size	26.0 ~ 30.0	nm
Specific surface area	80.0 ~ 110.0	m²/g
Density	1.8	g/cm³

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

high strength
Improve scratch resistance

Acid and alkali resistant rubber boot vamp rubber compound and preparation method thereof

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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