Colored rubber for all-steel trial-manufactured tire blank as well as preparation method and application of colored rubber

Abstract

The invention provides colored rubber for a tire blank of an all-steel trial-manufactured tire as well as a preparation method and application thereof, and relates to the technical field of rubber, the colored rubber comprises the following components: 80-120 parts of natural rubber, 3-8 parts of zinc oxide, 1-4 parts of stearic acid, 10-50 parts of titanium dioxide, 5-15 parts of organic pigment, 20-70 parts of a reinforcing material, 0.2-2 parts of an accelerant and 1.5-5 parts of sulfur. According to the colored rubber for the all-steel trial-manufactured tire blank and the preparation method, the colored rubber can be directly attached to the side of a semi-finished tire blank, is uniform and stable in color, attractive and durable, and is integrally formed with the side of a finished tire after being vulcanized; the labeling procedure is omitted, and the production efficiency is improved; and heavy metal-free pigments and environment-friendly reinforcing materials are adopted, so that the REACH standard is met, and the paint is environment-friendly and safe.

Description

Technical Field

[0001] The present invention relates to the field of rubber technology, in particular to a colored rubber for an all-steel trial tire blank, a preparation method and an application thereof. Background Art

[0002] During the R&D phase of all-steel pilot tires, different models or batches of tire blanks must be labeled and differentiated. Traditional methods, such as adhesive paper labels or spray-on markings, present the following challenges: poor aesthetics: the paper adheres poorly to the tire surface, easily warping and peeling, affecting appearance; insufficient durability: the paper easily tears and peels under the high temperature and pressure of vulcanization, rendering the marking ineffective; and complex manufacturing: the additional adhesive or spraying steps required increase production time and cost.

[0003] In the prior art, although colored rubber is used in rubber products, the formula is not optimized for the marking requirements of tire blanks, and the balance between color stability, processing performance and environmental protection is not solved. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a color glue, preparation method and application for all-steel trial tire blanks, so as to solve the problem that traditional paper labels are unsightly and easy to fall off, and directly realize the method of distinguishing tire blanks through the color glue formula with color stability, processing performance and environmental protection.

[0005] The technical solution adopted in the present invention is:

[0006] A color rubber for all-steel trial tire blanks, comprising the following components:

[0007] 80-120 parts of natural rubber, 3-8 parts of zinc oxide, 1-4 parts of stearic acid, 10-50 parts of titanium dioxide, 5-15 parts of organic pigment, 20-70 parts of reinforcing material, 0.2-2 parts of accelerator, and 1.5-5 parts of sulfur.

[0008] Preferably, in the colored rubber for all-steel trial tire blanks, the reinforcing material is calcium carbonate, the calcium carbonate has a particle size D50 of 2 to 5 μm, a whiteness value ≥90%, an oil absorption value of 70 to 80 ml / 100 g, and a calcium carbonate content ≥98%.

[0009] Preferably, in the color rubber for all-steel trial tire blanks, the zinc oxide is indirect zinc oxide with a zinc oxide content of ≥99.7%; and the titanium dioxide is rutile organic titanium dioxide that complies with RoHS and REACH environmental standards and regulations and has a whiteness value of ≥97%.

[0010] Preferably, in the color glue for all-steel trial tire blanks, the organic pigment is selected from one or two of monoazo pigments, disazo pigments, and phthalocyanine pigments; and the phthalocyanine pigment is selected from one or two of phthalocyanine blue and phthalocyanine green.

[0011] Preferably, in the color rubber for all-steel trial tire blank, the accelerator is selected from one or both of DM accelerator and NS accelerator.

[0012] The present invention also provides a method for preparing a color rubber for an all-steel trial tire blank, which comprises the following steps:

[0013] Step S1. A mixing step: natural rubber, zinc oxide, stearic acid, titanium dioxide, organic pigment, and reinforcing material are put into an open mill and mixed to obtain a mixed rubber;

[0014] Step S2. Second stage mixing: adding accelerator and sulfur to the first stage mixed rubber and mixing to obtain colored rubber.

[0015] Preferably, in the method for preparing the colored rubber for the all-steel trial tire blank, the mixing temperature in step S1 is 70-80° C., the rotation speed is 40-50 r / min, and the mixing time is 120-150 s.

[0016] Preferably, in the method for preparing the colored rubber for all-steel trial tire blanks, the mixing temperature in step S2 is 60-70° C., the rotation speed is 30-40 r / min, and the mixing time is 80-100 s.

[0017] A method for preparing colored glue for an all-steel trial tire blank is disclosed. The colored glue is used to distinguish the all-steel trial tire blank. The application specifically includes the following steps: the colored glue is printed through a mold, affixed to the side of the tire blank, and then vulcanized integrally with other parts of the tire blank to obtain the all-steel trial tire.

[0018] Advantages of the present invention:

[0019] (1) The colored rubber and preparation method for all-steel trial tire blanks of the present invention are as follows: natural rubber, zinc oxide, stearic acid, titanium dioxide, organic pigments, reinforcing fillers, accelerators and sulfur are mixed in specific proportions and prepared into the colored rubber through a two-stage mixing process. The present invention utilizes the high whiteness, light weight and high dispersibility of the special reinforcing fillers to significantly improve the color stability of the rubber, the processability and environmental friendliness of the rubber, and ensure the strength and weather resistance of the rubber.

[0020] (2) The colored glue and preparation method for the all-steel trial tire embryo of the present invention can be directly attached to the side of the semi-finished tire embryo, with uniform and stable color, beautiful and long-lasting appearance, and can be integrally formed with the side of the finished tire after vulcanization; the labeling process is eliminated, thereby improving production efficiency; heavy metal-free pigments and environmentally friendly reinforcing materials are used, which complies with REACH standards and is environmentally friendly and safe. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to specific embodiments.

[0022] Example 1

[0023] A method for preparing a red colored rubber for an all-steel trial tire blank comprises the following steps, calculated by weight:

[0024] Step S1. A mixing stage: 100 parts of natural rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 20 parts of calcium carbonate, 10 parts of titanium dioxide, and 7 parts of Rubber Red LC were put into a small open mill and mixed to obtain a mixed rubber. The mixing temperature was 70°C, the speed was 40 r / min, and the mixing time was 140 s.

[0025] Step S2. Second stage mixing: 0.45 parts of accelerator DM and 3.5 parts of sulfur were added to the first stage mixed rubber and mixed to obtain colored rubber. The mixing temperature was 65° C., the rotation speed was 35 r / min, and the mixing time was 90 s.

[0026] The application of the red color glue in this embodiment, wherein the red color glue is used to distinguish the tire blank of the all-steel trial tire, specifically includes the following steps: after the red color glue is printed through a mold, it is affixed to the side of the tire blank and then vulcanized together with other parts of the tire blank. The vulcanization temperature is 150°C and the vulcanization time is 30 minutes to obtain the all-steel trial tire.

[0027] Example 2

[0028] A method for preparing a red colored rubber for an all-steel trial tire blank comprises the following steps, calculated by weight:

[0029] Step S1. A mixing stage: 100 parts of natural rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 50 parts of calcium carbonate, 10 parts of titanium dioxide, and 7 parts of Rubber Red LC were put into a small open mill and mixed to obtain a mixed rubber. The mixing temperature was 70°C, the speed was 40 r / min, and the mixing time was 140 s.

[0030] Step S2. Second stage mixing: 0.45 parts of accelerator DM and 3.5 parts of sulfur powder are added to the first stage mixed rubber and mixed to obtain colored rubber. The mixing temperature is 65° C., the rotation speed is 30 r / min, and the mixing time is 90 s.

[0031] The application of the red color glue in this embodiment, wherein the red color glue is used to distinguish the tire blank of the all-steel trial tire, specifically includes the following steps: after the red color glue is printed through a mold, it is affixed to the side of the tire blank and then vulcanized together with other parts of the tire blank. The vulcanization temperature is 150°C and the vulcanization time is 30 minutes to obtain the all-steel trial tire.

[0032] Example 3

[0033] A method for preparing a red colored rubber for an all-steel trial tire blank comprises the following steps, calculated by weight:

[0034] Step S1. A mixing stage: 100 parts of natural rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 70 parts of calcium carbonate, 10 parts of titanium dioxide, and 7 parts of Rubber Red LC were put into a small open mill and mixed to obtain a mixed rubber. The mixing temperature was 70°C, the speed was 40 r / min, and the mixing time was 140 s.

[0035] Step S2. Second stage mixing: 0.45 parts of accelerator DM and 3.5 parts of sulfur powder were added to the first stage mixed rubber and mixed to obtain red color rubber. The mixing temperature was 65° C., the rotation speed was 35 r / min, and the mixing time was 90 s.

[0036] The application of the red color glue in this embodiment, wherein the red color glue is used to distinguish the tire blank of the all-steel trial tire, specifically includes the following steps: after the red color glue is printed through a mold, it is affixed to the side of the tire blank and then vulcanized together with other parts of the tire blank. The vulcanization temperature is 150°C and the vulcanization time is 30 minutes to obtain the all-steel trial tire.

[0037] Example 4

[0038] A method for preparing a blue colored rubber for an all-steel trial tire blank comprises the following steps, calculated by weight:

[0039] Step S1. A mixing stage: 100 parts of natural rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 20 parts of calcium carbonate, 43 parts of titanium dioxide, and 12.5 parts of phthalocyanine blue were put into a small open mill and mixed to obtain a mixed rubber. The mixing temperature was 70°C, the speed was 40 r / min, and the mixing time was 140 s.

[0040] Step S2. Second stage mixing: add 0.5 parts of accelerator DM and 3 parts of sulfur powder to the first stage mixed rubber and mix them to obtain blue colored rubber. The mixing temperature is 65°C, the rotation speed is 35 r / min, and the mixing time is 90 s.

[0041] The application of the blue colored glue in this embodiment, wherein the blue colored glue is used for distinguishing the tire blank of the all-steel trial tire, specifically includes the following steps: after the blue colored glue is printed through a mold, it is affixed to the side of the tire blank and then vulcanized together with other parts of the tire blank at a vulcanization temperature of 150°C and a vulcanization time of 30 minutes to obtain the all-steel trial tire.

[0042] Example 5

[0043] A method for preparing a blue colored rubber for an all-steel trial tire blank comprises the following steps, calculated by weight:

[0044] Step S1. A mixing stage: 100 parts of natural rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 43 parts of calcium carbonate, 43 parts of titanium dioxide, and 12.5 parts of phthalocyanine blue were put into a small open mill and mixed to obtain a mixed rubber. The mixing temperature was 70°C, the speed was 40 r / min, and the mixing time was 140 s.

[0045] Step S2. Second stage mixing: add 0.5 parts of accelerator DM and 3 parts of sulfur powder to the first stage mixed rubber and mix them to obtain blue colored rubber. The mixing temperature is 65°C, the rotation speed is 35 r / min, and the mixing time is 90 s.

[0046] The application of the blue colored glue in this embodiment, wherein the blue colored glue is used for distinguishing the tire blank of the all-steel trial tire, specifically includes the following steps: after the blue colored glue is printed through a mold, it is affixed to the side of the tire blank and then vulcanized together with other parts of the tire blank at a vulcanization temperature of 150°C and a vulcanization time of 30 minutes to obtain the all-steel trial tire.

[0047] Example 6

[0048] A method for preparing a blue colored rubber for an all-steel trial tire blank comprises the following steps, calculated by weight:

[0049] Step S1. A mixing stage: 100 parts of natural rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 60 parts of calcium carbonate, 43 parts of titanium dioxide, and 12.5 parts of phthalocyanine blue were put into a small open mill and mixed to obtain a mixed rubber. The mixing temperature was 70°C, the speed was 40 r / min, and the mixing time was 140 s.

[0050] Step S2. Second stage mixing: add 0.5 parts of accelerator DM and 3 parts of sulfur powder to the first stage mixed rubber and mix them to obtain blue colored rubber. The mixing temperature is 65°C, the rotation speed is 35 r / min, and the mixing time is 90 s.

[0051] The application of the blue colored glue in this embodiment, wherein the blue colored glue is used for distinguishing the tire blank of the all-steel trial tire, specifically includes the following steps: after the blue colored glue is printed through a mold, it is affixed to the side of the tire blank and then vulcanized together with other parts of the tire blank at a vulcanization temperature of 150°C and a vulcanization time of 30 minutes to obtain the all-steel trial tire.

[0052] Example 7

[0053] A method for preparing a green colored rubber for an all-steel trial tire blank comprises the following steps, calculated by weight:

[0054] Step S1. A mixing stage: 100 parts of natural rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 20 parts of calcium carbonate, 43 parts of titanium dioxide, and 12.5 parts of phthalocyanine green were put into a small open mill and mixed to obtain a mixed rubber. The mixing temperature was 70°C, the speed was 40 r / min, and the mixing time was 140 s.

[0055] Step S2. Second stage mixing: add 0.5 parts of accelerator DM and 3 parts of sulfur powder to the first stage mixed rubber and mix them to obtain green colored rubber. The mixing temperature is 65° C., the rotation speed is 35 r / min, and the mixing time is 90 s.

[0056] The application of the green colored glue in this embodiment, wherein the green colored glue is used to distinguish the embryo of the all-steel trial tire, specifically includes the following steps: the green colored glue is printed through a mold, affixed to the side of the embryo, and then vulcanized together with other parts of the embryo to obtain the all-steel trial tire.

[0057] Example 8

[0058] A method for preparing a green colored rubber for an all-steel trial tire blank comprises the following steps, calculated by weight:

[0059] Step S1. A mixing stage: 100 parts of natural rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 43 parts of calcium carbonate, 43 parts of titanium dioxide, and 12.5 parts of phthalocyanine green were put into a small open mill and mixed to obtain a mixed rubber. The mixing temperature was 70°C, the speed was 40 r / min, and the mixing time was 140 s.

[0060] Step S2. Second stage mixing: add 0.5 parts of accelerator DM and 3 parts of sulfur powder to the first stage mixed rubber and mix them to obtain green colored rubber. The mixing temperature is 65° C., the rotation speed is 35 r / min, and the mixing time is 90 s.

[0061] The application of the green colored glue in this embodiment, wherein the green colored glue is used to distinguish the embryo of the all-steel trial tire, specifically includes the following steps: the green colored glue is printed through a mold, affixed to the side of the embryo, and then vulcanized together with other parts of the embryo at a vulcanization temperature of 150°C and a vulcanization time of 30 minutes to obtain the all-steel trial tire.

[0062] Example 9

[0063] Step S1. A mixing stage: 100 parts of natural rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 60 parts of calcium carbonate, 43 parts of titanium dioxide, and 12.5 parts of phthalocyanine green were put into a small open mill and mixed to obtain a mixed rubber. The mixing temperature was 70°C, the speed was 40 r / min, and the mixing time was 140 s.

[0064] Step S2. Second stage mixing: add 0.5 parts of accelerator DM and 3 parts of sulfur powder to the first stage mixed rubber and mix them to obtain green colored rubber. The mixing temperature is 65° C., the rotation speed is 35 r / min, and the mixing time is 90 s.

[0065] The application of the green colored glue in this embodiment, wherein the green colored glue is used to distinguish the embryo of the all-steel trial tire, specifically includes the following steps: the green colored glue is printed through a mold, affixed to the side of the embryo, and then vulcanized together with other parts of the embryo at a vulcanization temperature of 150°C and a vulcanization time of 30 minutes to obtain the all-steel trial tire.

[0066] The all-steel trial tires obtained in Examples 1 to 9 were subjected to performance tests, and the test results are shown in Tables 1 to 3.

[0067] Table 1

[0068]

[0069] Table 2

[0070]

[0071] Table 3

[0072]

[0073] As can be seen from the results in Tables 1-3, the red, blue, and green color glue formulas simultaneously achieve color stability, processability, environmental friendliness, and the required physical properties of the rubber material. The present invention achieves efficient, aesthetically pleasing, and environmentally friendly labeling of tire blanks by optimizing the color glue formula and process, is suitable for the mass production of all-steel pilot tires, and has significant economic and environmental benefits.

[0074] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A color rubber for all-steel trial tire blanks, characterized in that: The composition comprises the following components in parts by weight: 80-120 parts of natural rubber, 3-8 parts of zinc oxide, 1-4 parts of stearic acid, 10-50 parts of titanium dioxide, 5-15 parts of organic pigment, 20-70 parts of reinforcing material, 0.2-2 parts of accelerator and 1.5-5 parts of sulfur.

2. The color rubber for all-steel trial tire blank according to claim 1, characterized in that: The reinforcing material is calcium carbonate, the particle size D50 of the calcium carbonate is 2-5 μm, the whiteness value is ≥90%, the oil absorption value is 70-80 ml / 100 g, and the calcium carbonate content is ≥98%.

3. The color rubber for all-steel trial tire blank according to claim 1, characterized in that: The zinc oxide is indirectly produced and has a zinc oxide content of ≥99.7%.

4. The color rubber for all-steel trial tire blank according to claim 1, characterized in that: The organic pigment is selected from one or two of monoazo pigments, disazo pigments, and phthalocyanine pigments; and the phthalocyanine pigment is selected from one or two of phthalocyanine blue and phthalocyanine green.

5. The color rubber for all-steel trial tire blank according to claim 1, characterized in that: The promoter is selected from one or both of a DM promoter and a promoter of NS.

6. A method for preparing a color rubber for a full-steel trial tire blank, characterized in that: The following steps are involved: Step S1. A mixing step: natural rubber, zinc oxide, stearic acid, titanium dioxide, organic pigment, and reinforcing material are put into an open mill and mixed to obtain a mixed rubber; Step S2. Second stage mixing: adding accelerator and sulfur to the first stage mixed rubber and mixing to obtain colored rubber.

7. The method for preparing colored rubber for all-steel trial tire blank according to claim 6, characterized in that: In step S1 , the mixing temperature is 70-80° C., the rotation speed is 40-50 r / min, and the mixing time is 120-150 s.

8. The method for preparing colored rubber for all-steel trial tire blank according to claim 6, characterized in that: In step S2, the mixing temperature is 60-70° C., the rotation speed is 30-40 r / min, and the mixing time is 80-100 s.

9. An application of the colored rubber prepared by the method for preparing colored rubber for all-steel trial tire blanks according to any one of claims 6 to 8, characterized in that: Colored glue is used to distinguish the embryos of all-steel trial tires. The specific application includes the following steps: the colored glue is printed through a mold, affixed to the side of the embryo, and then vulcanized together with other parts of the embryo to obtain an all-steel trial tire.

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