Preparation method of waste rubber regenerant

Abstract

The invention provides a preparation method of a waste rubber regenerant, and relates to the technical field of waste rubber regeneration. The preparation method of the waste rubber regenerant comprises the following steps: taking a plurality of waste tires, and cleaning and drying the waste tires; cutting and crushing the waste tires to obtain rubber particles for later use; the preparation method comprises the following steps: adding a plurality of components of the softening agent into a reaction kettle, heating and uniformly stirring to obtain a mixture A; adding rubber particles, an activating agent, a tackifier and an auxiliary agent into the reaction kettle, heating and continuously stirring to obtain a mixture B; adding the vegetable oil, the rosin and the fruit peel into the reaction kettle, heating and uniformly stirring to obtain a mixture C; and taking out the mixture C, and cooling to room temperature to obtain the waste rubber regenerant. According to the invention, the softening agent, the activating agent and the tackifier adopted in the invention have the effects of small odor and low harmful component content in the production process of the waste rubber regenerant.

Description

Technical Field

[0001] The invention relates to the technical field of waste rubber regeneration, in particular to a method for preparing a waste rubber regeneration agent. Background Art

[0002] my country is a major producer and consumer of rubber in the world. Therefore, the recycling of waste rubber is of great significance to protecting the environment and rationally utilizing resources.

[0003] Waste rubber recycling refers to the process of crushing, heating, mechanical treatment and other physical and chemical processes to restore the waste rubber from an elastic state to a rubber with plasticity and viscosity that can be re-vulcanized. There are many methods for recycling waste rubber. Chemical recycling uses some chemical additives such as organic disulfide, mercaptan, alkali metals, etc. At a certain temperature, chemical additives react with the SS bonds in the waste vulcanized rubber to break them and achieve the purpose of regeneration. However, chemical additives are very likely to release harmful, toxic and smelly gases under high temperature and pressure, causing pollution to the environment.

[0004] At present, most of the regeneration agents used in the production of recycled rubber are coal tar, coal tar, tar asphalt and a variety of chemical substances. These chemical substances not only cause great environmental pollution in the production process of recycled rubber, but also produce a variety of harmful gases that are unfavorable to the environment during the processing and production of rubber products, which seriously restricts the application of recycled rubber in rubber products. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a method for preparing a waste rubber regeneration agent, which solves the problem of a large amount of harmful gas pollution generated during the production process of the waste rubber regeneration agent.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented by the following technical scheme: A method for preparing a waste rubber regeneration agent comprises the following steps:

[0009] Step 1: Get a clean tire:

[0010] Take some waste tires, wash them and dry them;

[0011] Step 2: Preparation of rubber particles:

[0012] Cut and crush the waste tires to obtain rubber pellets for later use;

[0013] Step 3: Prepare mixture A:

[0014] Take a certain amount of each component of the softener, add it into a reaction kettle, heat and stir evenly to obtain a mixture A;

[0015] Step 4: Preparation of mixture B:

[0016] Add rubber particles, activator, tackifier and additives into the above reaction kettle, heat and stir continuously to obtain mixture B;

[0017] Step 5: Preparation of mixture C:

[0018] Add vegetable oil, rosin and peel into the above reaction kettle, heat and stir evenly to obtain mixture C;

[0019] Step 6: Preparation of waste rubber recycling agent:

[0020] The mixture C is taken out and cooled to room temperature to obtain the waste rubber regeneration agent.

[0021] Preferably, in step 2, the particle size of the rubber particles is 0.5-1 mm.

[0022] Preferably, in step three, the softener is a mixture of one or more of silicone oil, tar, and wax oil.

[0023] Preferably, the softener comprises the following raw materials by weight: 2-3 parts of silicone oil, 3-5 parts of tar, and 1-3 parts of wax oil.

[0024] Preferably, in step three, the heating temperature of the reactor is 150-200°C.

[0025] Preferably, in step 4, the activator is a mixture of one or more of aromatic disulfides, aromatic thiols, thiophenols, and zinc salts; the tackifier is a mixture of one or more of soybean oil, linseed oil, and rosin; and the auxiliary agent includes a deodorant and an antioxidant.

[0026] Preferably, the activator comprises the following raw materials by weight: 1-3 parts of aromatic disulfide, 2-3 parts of aromatic thiol, 2-5 parts of thiophenol and 1-3 parts of zinc salt, the tackifier comprises the following raw materials by weight: 3-5 parts of soybean oil, 2-3 parts of linseed oil, 2-4 parts of rosin, and the auxiliary agent comprises the following raw materials by weight: 1-3 parts of deodorant and 1-3 parts of antioxidant.

[0027] Preferably, in step 4, the heating temperature of the reactor is 110-150°C.

[0028] Preferably, in step five, the heating temperature of the reactor is 100-120°C.

[0029] (III) Beneficial effects

[0030] The present invention provides a method for preparing a waste rubber regeneration agent. It has the following beneficial effects:

[0031] 1. The softener, activator and tackifier used in the present invention have the effects of low odor and low harmful components in the production process of waste rubber regeneration agent.

[0032] 2. By adding vegetable oil, rosin and peel to the raw materials of the present invention, the pollution to the environment is reduced, which is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic flow chart of the preparation method of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] like Figure 1 As shown, the embodiment of the present invention provides a method for preparing a waste rubber regeneration agent, comprising the following steps:

[0037] Step 1: Get a clean tire:

[0038] Take some waste tires, wash them and dry them;

[0039] Step 2: Preparation of rubber particles:

[0040] The waste tires are cut and crushed to obtain rubber particles with a particle size of 0.5 mm for later use;

[0041] Step 3: Prepare mixture A:

[0042] Take 3 parts of a softener, namely silicone oil, add it into a reaction kettle, heat to 150° C., and stir evenly to obtain a mixture A;

[0043] Step 4: Preparation of mixture B:

[0044] Add 20 parts of rubber particles, 3 parts of activator, 3 parts of tackifier and 3 parts of auxiliary agent into the above reaction kettle, wherein the activator is aromatic thiol, the tackifier is soybean oil, and the auxiliary agent is a 1:1 mixture of deodorant and antioxidant, heat to 110°C, and stir continuously to obtain mixture B;

[0045] Step 5: Preparation of mixture C:

[0046] Add 3 parts of vegetable oil, rosin and peel to the above reaction kettle, heat to 100°C, and stir evenly to obtain a mixture C;

[0047] Step 6: Preparation of waste rubber recycling agent:

[0048] The mixture C is taken out and cooled to room temperature to obtain the waste rubber regeneration agent.

[0049] Embodiment 2:

[0050] like Figure 1 As shown, the embodiment of the present invention provides a method for preparing a waste rubber regeneration agent, comprising the following steps:

[0051] Step 1: Get a clean tire:

[0052] Take some waste tires, wash them and dry them;

[0053] Step 2: Preparation of rubber particles:

[0054] The waste tires are cut and crushed to obtain rubber particles with a particle size of 0.7 mm for later use;

[0055] Step 3: Prepare mixture A:

[0056] Take 3 parts of a softener, namely tar, add it into a reaction kettle, heat to 180°C, and stir evenly to obtain a mixture A;

[0057] Step 4: Preparation of mixture B:

[0058] Add 20 parts of rubber particles, 3 parts of activator, 3 parts of tackifier and 3 parts of auxiliary agent into the above reaction kettle, wherein the activator is aromatic disulfide, the tackifier is linseed oil, and the auxiliary agent is a 1:1 mixture of deodorant and antioxidant, heat to 130°C, and stir continuously to obtain mixture B;

[0059] Step 5: Preparation of mixture C:

[0060] Add 3 parts of vegetable oil, rosin and peel to the above reaction kettle, heat to 110°C, and stir evenly to obtain a mixture C;

[0061] Step 6: Preparation of waste rubber recycling agent:

[0062] The mixture C is taken out and cooled to room temperature to obtain the waste rubber regeneration agent.

[0063] Embodiment three:

[0064] like Figure 1As shown, the embodiment of the present invention provides a method for preparing a waste rubber regeneration agent, comprising the following steps:

[0065] Step 1: Get a clean tire:

[0066] Take some waste tires, wash them and dry them;

[0067] Step 2: Preparation of rubber particles:

[0068] The waste tires are cut and crushed to obtain rubber particles with a particle size of 0.7 mm for later use;

[0069] Step 3: Prepare mixture A:

[0070] Take 3 parts of a softener, namely wax oil, add it into a reaction kettle, heat to 200°C, and stir evenly to obtain a mixture A;

[0071] Step 4: Preparation of mixture B:

[0072] Add 20 parts of rubber particles, 3 parts of activator, 3 parts of tackifier and 3 parts of auxiliary agent into the above reaction kettle, wherein the activator is a thiophenol mixture, the tackifier is rosin, and the auxiliary agent is a 1:1 mixture of deodorant and antioxidant, heat to 150°C, and stir continuously to obtain mixture B;

[0073] Step 5: Preparation of mixture C:

[0074] Add 3 parts of vegetable oil, rosin and peel to the above reaction kettle, heat to 120°C, and stir evenly to obtain mixture C;

[0075] Step 6: Preparation of waste rubber recycling agent:

[0076] The mixture C is taken out and cooled to room temperature to obtain the waste rubber regeneration agent.

[0077] Embodiment 4:

[0078] like Figure 1 As shown, the embodiment of the present invention provides a method for preparing a waste rubber regeneration agent, comprising the following steps:

[0079] Step 1: Get a clean tire:

[0080] Take some waste tires, wash them and dry them;

[0081] Step 2: Preparation of rubber particles:

[0082] The waste tires are cut and crushed to obtain rubber particles with a particle size of 0.7 mm for later use;

[0083] Step 3: Prepare mixture A:

[0084] Take 3 parts of a softener, i.e., a mixture of silicone oil, tar, and wax oil, add it into a reaction kettle, heat it to 200° C., and stir it evenly to obtain a mixture A;

[0085] Step 4: Preparation of mixture B:

[0086] Add 20 parts of rubber particles, 3 parts of activator, 3 parts of tackifier and 3 parts of auxiliary agent into the above reaction kettle, wherein the activator is a mixture of aromatic disulfide, aromatic thiol, thiophenol and zinc salt, the tackifier is a mixture of soybean oil, linseed oil and rosin, and the auxiliary agent is a 1:1 mixture of deodorant and antioxidant, heat to 150°C, and stir continuously to obtain mixture B;

[0087] Step 5: Preparation of mixture C:

[0088] Add 3 parts of vegetable oil, rosin and peel to the above reaction kettle, heat to 120°C, and stir evenly to obtain mixture C;

[0089] Step 6: Preparation of waste rubber recycling agent:

[0090] The mixture C is taken out and cooled to room temperature to obtain the waste rubber regeneration agent.

[0091] Comparative Example:

[0092] The preparation method of the waste rubber regeneration agent comprises the following steps:

[0093] Step 1: Get a clean tire:

[0094] Take some waste tires, wash them and dry them;

[0095] Step 2: Preparation of rubber particles:

[0096] The waste tires are cut and crushed to obtain rubber particles with a particle size of 0.5 mm for later use;

[0097] Step 3: Prepare mixture A:

[0098] Take 3 parts of a softener, namely silicone oil, add it into a reaction kettle, heat to 150°C, and stir evenly to obtain a mixture A;

[0099] Step 4: Preparation of mixture B:

[0100] Add 20 parts of rubber particles and 3 parts of an auxiliary agent, wherein the auxiliary agent is a 1:1 mixture of a deodorant and an antioxidant, to the above reactor, heat to 110° C., and stir continuously to obtain a mixture B;

[0101] Step 5: Preparation of waste rubber recycling agent:

[0102] The mixture B is taken out and cooled to room temperature to obtain the waste rubber regeneration agent.

[0103] Experimental example:

[0104] The performance of the waste rubber regeneration agent prepared in Examples 1, 2, 3, 4 and the comparative example was tested, and the results are shown in the following table:

[0105] Example Tensile strength / MPa PAHs (mg / kg) Pollution (smell) Embodiment 1 15.25 52 none Embodiment 2 16.64 55 none Embodiment 3 15.97 51 none Embodiment 4 16.24 53 none Comparative Example 12.35 475 have

[0106] In summary: the softener, activator and tackifier used in the present invention have the effects of low odor and low harmful components in the production process of the waste rubber regeneration agent;

[0107] By adding vegetable oil, rosin and peel to the raw materials of the present invention, the pollution to the environment is reduced, and more environmental benefits are achieved.

[0108] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a waste rubber regeneration agent, characterized in that: The following steps are involved: Step 1: Get a clean tire: Take some waste tires, wash them and dry them; Step 2: Preparation of rubber particles: Cut and crush the waste tires to obtain rubber pellets for later use; Step 3: Prepare mixture A: Take a certain amount of each component of the softener, add it into a reaction kettle, heat and stir evenly to obtain a mixture A; Step 4: Preparation of mixture B: Add rubber particles, activator, tackifier and additives into the above reaction kettle, heat and stir continuously to obtain mixture B; Step 5: Preparation of mixture C: Add vegetable oil, rosin and peel into the above reaction kettle, heat and stir evenly to obtain mixture C; Step 6: Preparation of waste rubber recycling agent: The mixture C is taken out and cooled to room temperature to obtain the waste rubber regeneration agent.

2. The method for preparing the waste rubber regeneration agent according to claim 1, characterized in that: In step 2, the particle size of the rubber particles is 0.5-1 mm.

3. The method for preparing the waste rubber regeneration agent according to claim 1, characterized in that: In step three, the softener is a mixture of one or more of silicone oil, tar, and wax oil.

4. The method for preparing the waste rubber regeneration agent according to claim 1 or 3, characterized in that: The softener is measured by weight The invention comprises the following raw materials: 2-3 parts of silicone oil, 3-5 parts of tar and 1-3 parts of wax oil.

5. The method for preparing the waste rubber regeneration agent according to claim 1, characterized in that: In step 3, the heating temperature of the reactor is 150-200°C.

6. The method for preparing the waste rubber regeneration agent according to claim 1, characterized in that: In step 4, the activator is a mixture of one or more of aromatic disulfides, aromatic thiols, thiophenols, and zinc salts; the tackifier is a mixture of one or more of soybean oil, linseed oil, and rosin; and the auxiliary agent includes a deodorant and an antioxidant.

7. The method for preparing the waste rubber regeneration agent according to claim 1 or 6, characterized in that: The activator comprises the following raw materials by weight: 1-3 parts of aromatic disulfide, 2-3 parts of aromatic mercaptan, 2-5 parts of thiophenol and 1-3 parts of zinc salt. The tackifier comprises The invention comprises the following raw materials: 3-5 parts of soybean oil, 2-3 parts of linseed oil and 2-4 parts of rosin. The auxiliary agent comprises the following raw materials by weight: 1-3 parts of deodorant and 1-3 parts of antioxidant.

8. The method for preparing the waste rubber regeneration agent according to claim 1, characterized in that: In step 4, the heating temperature of the reactor is 110-150°C.

9. The method for preparing the waste rubber regeneration agent according to claim 1, characterized in that: In step 5, the heating temperature of the reactor is 100-120°C.

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