Plastic compound additive and preparation method thereof

Abstract

The invention relates to the field of plastic additive preparation, in particular to a plastic compound additive and a preparation method thereof. The invention provides a plastic compounding auxiliary agent. The plastic compounding auxiliary agent is prepared from the following components: isosorbide diheptyl ester, poly (hexanediol succinate), a Revonox 420 antioxidant, salicylate, zinc oxide, pentaerythritol bismaleate and a flame retardant, the preparation method of the plastic compound auxiliary agent comprises the steps of S1 mixture preparation and S2 plastic compound auxiliary agent preparation, parameters such as temperature are controlled in the preparation process, the mixing degree and compatibility of the raw materials are effectively improved, the finally prepared plastic compound auxiliary agent has stable properties, and the flexibility, extensibility and plasticity of plastic are improved.

Description

Technical Field

[0001] The invention relates to the field of plastic additive preparation, and in particular to a plastic compounding additive and a preparation method thereof. Background Art

[0002] Plastics are widely used polymer materials in modern society, and their application fields are wide, including packaging, construction, automobiles, electronic appliances, etc. With the development of the global economy and the improvement of people's living standards, the demand for plastic products continues to grow, which has promoted the rapid development of the plastics industry. Plastic additives, as key materials for improving plastic processing performance and improving the quality of plastic products, have been widely used with the development of the plastics industry. Compound additives can significantly improve the comprehensive performance of plastic products, reduce production costs, and improve production efficiency through the synergistic effect of different ingredients.

[0003] However, the performance of the plastic compounding additives obtained by the current production process is unstable, which will affect the performance of plastic products, resulting in low tensile strength, low hardness and poor thermal stability of plastic products. Therefore, it is necessary to invent a plastic compounding additive with good stability. Summary of the invention

[0004] In view of the above existing technical problems, a plastic compounding auxiliary agent and a preparation method thereof are provided. The plastic compounding auxiliary agent prepared by this method has stable performance, so that the plastic product added with this auxiliary agent has high tensile strength, hardness and density, and strong thermal stability.

[0005] The present invention discloses a plastic compounding auxiliary agent, comprising the following components in parts by weight:

[0006] Plasticizer: 30-50 parts; heat stabilizer: 3-4 parts; Revonox 420 antioxidant: 1-2 parts; light stabilizer: 1-2 parts; flame retardant: 1-2 parts.

[0007] Preferably, the plasticizer is composed of poly(hexanediol succinate) and diheptyl isosorbide in a mass ratio of 1:(1.5-2).

[0008] Preferably, the heat stabilizer is composed of polyurea and pentaerythritol bismaleate in a mass ratio of 1:(1.3-1.5).

[0009] Preferably, the light stabilizer is composed of salicylic acid ester and zinc oxide in a mass ratio of 1: (0.95-1).

[0010] The present invention also discloses a method for preparing a plastic compounding auxiliary agent, comprising the following steps:

[0011] S1 mixture preparation: plasticizer, heat stabilizer, Revonox 420 antioxidant and flame retardant are prepared in proportion, and then added into a mixer in sequence, and then anhydrous methanol is added, heated and stirred for reaction, and a mixture is obtained after the reaction is completed;

[0012] S2 Preparation of plastic compounding additives: Cooling and filtering the mixture obtained in step S1, collecting the filter cake, washing and drying the filter cake to obtain a block of plastic compounding additives; adding the block of plastic compounding additives into a granulator, then adding resin, and then heating and melting it to form granular plastic compounding additives, and then sieving to obtain plastic compounding additives with uniform particles.

[0013] Preferably, in the S1 mixture preparation step, the mass ratio of the plasticizer to anhydrous methanol is 1:(15-20).

[0014] Preferably, in the S1 mixture preparation step, the temperature during the heating and stirring process is 55-65° C.; and the stirring speed is 500-800 r / min.

[0015] Preferably, in the step S2 of preparing the plastic compounding auxiliary agent, the mass ratio of the resin to the block-shaped plastic compounding auxiliary agent is 1:(18-23).

[0016] Preferably, in the step of preparing the S2 plastic compounding additive, the temperature during the heating and melting process is 100 to 120°C.

[0017] Preferably, in the step S2 of preparing the plastic compounding auxiliary agent, the particle size of the plastic compounding auxiliary agent obtained after sieving is 50 to 60 μm.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The invention provides a plastic compounding auxiliary agent. The plasticizer consists of diheptyl isosorbide and poly(hexanediol succinate), has better compatibility with PVC and the like, increases the softness, elongation and plasticity of plastics, and reduces the flow temperature and hardness. The Revonox 420 antioxidant has excellent low volatility and high-temperature storage stability, and is more effective than traditional hindered phenol antioxidants in inhibiting gas fading and discoloration. The bismaleic acid pentaerythritol ester in the heat stabilizer can be compounded with zinc oxide in the light stabilizer to play a synergistic role, further improving the compatibility problem between the raw materials of the plastic compounding auxiliary agent, so that the prepared plastic compounding auxiliary agent has more stable performance.

[0020] The present invention also provides a method for preparing a plastic compounding auxiliary agent. During the mixing process, the most suitable preparation conditions are screened out through experiments, and the raw materials are fully mixed under the premise that the auxiliary agent will not become ineffective due to high-temperature decomposition. DETAILED DESCRIPTION

[0021] The following examples are provided for a better understanding of the present invention, but are not intended to limit the best mode of implementation, nor to limit the content and protection scope of the present invention. Any product identical or similar to the present invention obtained by anyone under the inspiration of the present invention or by combining the features of the present invention with other prior arts shall fall within the protection scope of the present invention.

[0022] If no specific experimental steps or conditions are specified in the examples, the conventional experimental steps or conditions described in the literature in the field can be used. If no manufacturer is specified for the reagents or instruments used, they are all conventional reagent products that can be obtained commercially.

[0023] Example 1: A plastic compounding auxiliary agent, composed of the following components in parts by weight:

[0024] 30 parts of plasticizer; 3 parts of heat stabilizer; 1 part of Revonox 420 antioxidant; 1 part of light stabilizer; 1 part of flame retardant.

[0025] The plasticizer is composed of poly(hexanediol succinate) and diheptyl isosorbide at a mass ratio of 1:1.5; the heat stabilizer is composed of polyurea and bis(pentaerythritol maleate) at a mass ratio of 1:1.3; and the light stabilizer is composed of salicylic acid ester and zinc oxide at a mass ratio of 1:0.95.

[0026] A method for preparing a plastic compounding auxiliary agent comprises the following steps:

[0027] Preparation of S1 mixture: poly(hexanediol succinate), diheptyl isosorbide, polyurea, pentaerythritol bismaleate, Revonox 420 antioxidant, salicylate, zinc oxide and flame retardant are prepared in the above proportions, and then added into a mixer in sequence, followed by adding anhydrous methanol while stirring, wherein the mass ratio of plasticizer to anhydrous methanol is 1:15; after the addition of anhydrous methanol is completed, the reaction temperature is set to 55°C and the stirring speed is set to 500r / min, and a heating and stirring reaction is carried out to obtain a mixture after the reaction is completed.

[0028] S2 Preparation of plastic compounding additive: Cool the mixture obtained in step S1 to 25-28°C and filter it, collect the filter cake, wash the filter cake with anhydrous methanol for 3-4 times, put the collected filter cake into an oven for drying, and obtain a block-shaped plastic compounding additive after drying; add the block-shaped plastic compounding additive into a granulator, and then add resin, wherein the mass ratio of the added resin to the block-shaped plastic compounding additive is 1:18; then raise the temperature of the granulator to 100°C, and extrude the material in the granulator to form a granular plastic compounding additive after all the materials are melted, and sieve to obtain a plastic compounding additive with a particle size of 60μm.

[0029] Embodiment 2: A plastic compounding auxiliary agent, composed of the following components in parts by weight:

[0030] 35 parts of plasticizer; 3.2 parts of heat stabilizer; 1.2 parts of Revonox 420 antioxidant; 1.2 parts of light stabilizer; 1.2 parts of flame retardant.

[0031] The plasticizer is composed of poly(hexanediol succinate) and diheptyl isosorbide at a mass ratio of 1:1.6; the heat stabilizer is composed of polyurea and bis(pentaerythritol maleate) at a mass ratio of 1:1.35; and the light stabilizer is composed of salicylic acid ester and zinc oxide at a mass ratio of 1:0.96.

[0032] A method for preparing a plastic compounding auxiliary agent comprises the following steps:

[0033] Preparation of S1 mixture: poly(hexanediol succinate), diheptyl isosorbide, polyurea, pentaerythritol bismaleate, Revonox 420 antioxidant, salicylate, zinc oxide and flame retardant are prepared in the above proportions, and then added into a mixer in sequence, followed by adding anhydrous methanol while stirring, wherein the mass ratio of plasticizer to anhydrous methanol is 1:16; after the addition of anhydrous methanol is completed, the reaction temperature is set to 57°C and the stirring speed is set to 550r / min, and a heating and stirring reaction is carried out to obtain a mixture after the reaction is completed.

[0034] S2 Preparation of plastic compounding additive: Cool the mixture obtained in step S1 to 25-28°C and filter it, collect the filter cake, wash the filter cake with anhydrous methanol for 3-4 times, put the collected filter cake into an oven for drying, and obtain a block-shaped plastic compounding additive after drying; add the block-shaped plastic compounding additive into a granulator, and then add resin, wherein the mass ratio of the added resin to the block-shaped plastic compounding additive is 1:19; then raise the temperature of the granulator to 105°C, and extrude the material in the granulator to form a granular plastic compounding additive after all the materials are melted, and sieve to obtain a plastic compounding additive with a particle size of 58μm.

[0035] Embodiment 3: A plastic compounding auxiliary agent, composed of the following components in parts by weight:

[0036] 40 parts of plasticizer; 3.4 parts of heat stabilizer; 1.4 parts of Revonox 420 antioxidant; 1.6 parts of light stabilizer; 1.4 parts of flame retardant.

[0037] Among them, the plasticizer is composed of poly(hexanediol succinate) and diheptyl isosorbide at a mass ratio of 1:1.7; the heat stabilizer is composed of polyurea and bismaleic acid pentaerythritol ester at a mass ratio of 1:1.4; and the light stabilizer is composed of salicylic acid ester and zinc oxide at a mass ratio of 1:0.97.

[0038] A method for preparing a plastic compounding auxiliary agent comprises the following steps:

[0039] Preparation of S1 mixture: poly(hexanediol succinate), diheptyl isosorbide, polyurea, pentaerythritol bismaleate, Revonox 420 antioxidant, salicylate, zinc oxide and flame retardant are prepared in the above proportions, and then added into a mixer in sequence, followed by adding anhydrous methanol while stirring, wherein the mass ratio of plasticizer to anhydrous methanol is 1:17; after the addition of anhydrous methanol is completed, the reaction temperature is set to 59°C and the stirring speed is set to 600r / min, and a heating and stirring reaction is carried out to obtain a mixture after the reaction is completed.

[0040] S2 Preparation of plastic compounding additive: Cool the mixture obtained in step S1 to 25-28°C and filter it to collect the filter cake. Wash the filter cake with anhydrous methanol for 3-4 times and then put the collected filter cake into an oven for drying to obtain a block-shaped plastic compounding additive. Add the block-shaped plastic compounding additive to a granulator, and then add resin, wherein the mass ratio of the added resin to the block-shaped plastic compounding additive is 1:20; then raise the temperature of the granulator to 110°C, and extrude the material in the granulator to form a granular plastic compounding additive after all the materials are melted, and then sieve to obtain a plastic compounding additive with a particle size of 56μm.

[0041] Embodiment 4: A plastic compounding auxiliary agent, composed of the following components in parts by weight:

[0042] 45 parts of plasticizer; 3.6 parts of heat stabilizer; 1.6 parts of Revonox 420 antioxidant; 1.4 parts of light stabilizer; 1.8 parts of flame retardant.

[0043] Among them, the plasticizer is composed of poly(hexanediol succinate) and diheptyl isosorbide at a mass ratio of 1:1.8; the heat stabilizer is composed of polyurea and bismaleic acid pentaerythritol ester at a mass ratio of 1:1.45; and the light stabilizer is composed of salicylic acid ester and zinc oxide at a mass ratio of 1:0.98.

[0044] A method for preparing a plastic compounding auxiliary agent comprises the following steps:

[0045] Preparation of S1 mixture: poly(hexanediol succinate), diheptyl isosorbide, polyurea, pentaerythritol bismaleate, Revonox 420 antioxidant, salicylate, zinc oxide and flame retardant are prepared in the above proportions, and then added into a mixer in sequence, followed by adding anhydrous methanol while stirring, wherein the mass ratio of plasticizer to anhydrous methanol is 1:18; after the addition of anhydrous methanol is completed, the reaction temperature is set to 61°C and the stirring speed is set to 650r / min, and a heating and stirring reaction is carried out to obtain a mixture after the reaction is completed.

[0046] S2 Preparation of plastic compounding additive: Cool the mixture obtained in step S1 to 25-28°C and filter it to collect the filter cake. Wash the filter cake with anhydrous methanol for 3-4 times and then put the collected filter cake into an oven for drying to obtain a block-shaped plastic compounding additive. Add the block-shaped plastic compounding additive to a granulator, and then add resin, wherein the mass ratio of the added resin to the block-shaped plastic compounding additive is 1:21; then raise the temperature of the granulator to 115°C, and extrude the material in the granulator to form a granular plastic compounding additive after all the materials are melted, and then sieve to obtain a plastic compounding additive with a particle size of 54μm.

[0047] Example 5: A plastic compounding auxiliary agent, composed of the following components in parts by weight:

[0048] 50 parts of plasticizer; 3.8 parts of heat stabilizer; 2.0 parts of Revonox 420 antioxidant; 1.8 parts of light stabilizer; 1.6 parts of flame retardant.

[0049] The plasticizer is composed of poly(hexanediol succinate) and diheptyl isosorbide at a mass ratio of 1:1.9; the heat stabilizer is composed of polyurea and bis(pentaerythritol maleate) at a mass ratio of 1:1.5; and the light stabilizer is composed of salicylic acid ester and zinc oxide at a mass ratio of 1:0.99.

[0050] A method for preparing a plastic compounding auxiliary agent comprises the following steps:

[0051] Preparation of S1 mixture: poly(hexanediol succinate), diheptyl isosorbide, polyurea, pentaerythritol bismaleate, Revonox 420 antioxidant, salicylate, zinc oxide and flame retardant are prepared in the above proportions, and then added into a mixer in sequence, followed by adding anhydrous methanol while stirring, wherein the mass ratio of plasticizer to anhydrous methanol is 1:19; after the addition of anhydrous methanol is completed, the reaction temperature is set to 63°C and the stirring speed is set to 700r / min, and a heating and stirring reaction is carried out to obtain a mixture after the reaction is completed.

[0052] S2 Preparation of plastic compounding additive: Cool the mixture obtained in step S1 to 25-28°C and filter it to collect the filter cake. Wash the filter cake with anhydrous methanol for 3-4 times and then put the collected filter cake into an oven for drying to obtain a block-shaped plastic compounding additive. Add the block-shaped plastic compounding additive to a granulator, and then add resin, wherein the mass ratio of the added resin to the block-shaped plastic compounding additive is 1:22; then raise the temperature of the granulator to 120°C, and extrude the material in the granulator to form a granular plastic compounding additive after all the materials are melted, and then sieve to obtain a plastic compounding additive with a particle size of 52μm.

[0053] Embodiment 6: A plastic compounding auxiliary agent, composed of the following components in parts by weight:

[0054] 50 parts of plasticizer; 4 parts of heat stabilizer; 2.0 parts of Revonox 420 antioxidant; 2 parts of light stabilizer; 2 parts of flame retardant.

[0055] The plasticizer is composed of poly(hexanediol succinate) and diheptyl isosorbide in a mass ratio of 1:2; the heat stabilizer is composed of polyurea and bismaleic acid pentaerythritol ester in a mass ratio of 1:1.5; and the light stabilizer is composed of salicylic acid ester and zinc oxide in a mass ratio of 1:1.

[0056] A method for preparing a plastic compounding auxiliary agent comprises the following steps:

[0057] Preparation of S1 mixture: poly(hexanediol succinate), diheptyl isosorbide, polyurea, pentaerythritol bismaleate, Revonox 420 antioxidant, salicylate, zinc oxide and flame retardant are prepared in the above proportions, and then added into a mixer in sequence, followed by adding anhydrous methanol while stirring, wherein the mass ratio of plasticizer to anhydrous methanol is 1:20; after the addition of anhydrous methanol is completed, the reaction temperature is set to 65°C and the stirring speed is set to 800r / min, and a heating and stirring reaction is carried out to obtain a mixture after the reaction is completed.

[0058] S2 Preparation of plastic compounding additive: Cool the mixture obtained in step S1 to 25-28°C and filter it to collect the filter cake. Wash the filter cake with anhydrous methanol for 3-4 times and then put the collected filter cake into an oven for drying to obtain a block-shaped plastic compounding additive. Add the block-shaped plastic compounding additive to a granulator, and then add resin, wherein the mass ratio of the added resin to the block-shaped plastic compounding additive is 1:23; then increase the temperature of the granulator to 120°C, and extrude the material in the granulator to form a granular plastic compounding additive after all the materials are melted, and then sieve to obtain a plastic compounding additive with a particle size of 50μm.

[0059] Comparative Example 1: The plasticizer is 50 parts of poly(hexanediol succinate), the heat stabilizer is 3.8 parts of polyurea, the light stabilizer is 2.0 parts of salicylate, and the remaining raw materials are the same as those in Example 5; the preparation method is also the same as that in Example 5.

[0060] Comparative Example 2: The plasticizer is 50 parts of diheptyl isosorbide, the heat stabilizer is 3.8 parts of pentaerythritol bismaleate, the light stabilizer is 2.0 parts of zinc oxide, and the other raw materials are the same as those in Example 5; the preparation method is also the same as that in Example 5.

[0061] Comparative Example 3: The heat stabilizer is 3.8 parts of polyurea, and the other raw materials are the same as those in Example 5; the preparation method is also the same as that in Example 5.

[0062] Comparative Example 4: The light stabilizer is 2.0 parts of salicylate, and the other raw materials are the same as those in Example 5; the preparation method is also the same as that in Example 5.

[0063] The plastic compounding additives prepared in Examples 1 to 6 and Comparative Examples 1 to 4 were used to prepare corresponding composite plastics according to a conventional method for preparing composite PVC products, and all the composite PVC products prepared were tested for performance. The test results are shown in the following table:

[0064] Examples and Comparative Examples Tensile strength(MPa) Hardness(HA) <![CDATA[Density (g / cm 3 )]]> Example 1 65 76.1 1.44 Example 2 68 77.3 1.48 Example 3 72 74.2 1.53 Example 4 73 75.5 1.56 Example 5 75 78.9 1.62 Example 6 75 78.8 1.61 Comparative Example 1 55 66 1.32 Comparative Example 2 53 63 1.21 Comparative Example 3 52 62 1.23 Comparative Example 4 51 60 1.20

[0065] The composite PVC products prepared above were subjected to rheological test, and the test results are shown in the following table:

[0066]

[0067] As can be seen from the above table, the tensile strength, hardness and density of the composite PVC products added with the plastic compounding additives prepared in Examples 1 to 6 are stronger. In Comparative Example 1, the plasticizer is controlled to contain only polyhexanediol succinate, the heat stabilizer is controlled to contain only polyurea, and the light stabilizer is controlled to contain only salicylate; in Comparative Example 2, the plasticizer is controlled to contain only polyhexanediol succinate, the heat stabilizer is controlled to contain only polyurea, and the light stabilizer is controlled to contain only salicylate; the tensile strength, hardness and density of the composite PVC products added with the plastic compounding additives prepared in Comparative Examples 1 and 2 are lower than those in Example 5, indicating that the composite plasticizer, composite heat stabilizer and composite light stabilizer can effectively enhance the performance of the plastic compounding additives, thereby improving the performance of the plastic products added with such compounding additives. The tensile strength, hardness and density of the composite PVC products to which the plastic compounding additives prepared in Comparative Examples 3 and 4 were added were lower than those in Example 5, indicating that the bismaleic acid pentaerythritol ester in the heat stabilizer and the zinc oxide in the light stabilizer had a synergistic effect after compounding, further increasing the compatibility problem between the raw materials of the plastic compounding additives, making the performance of the obtained plastic compounding additives more stable.

[0068] In summary, the present invention adjusts the raw material composition and ingredient ratio and controls the reaction parameters in the preparation process to obtain a plastic compounding auxiliary agent with stable performance, so that the plastic products added with this auxiliary agent perform well in various performance tests; among them, the plastic compounding auxiliary agent prepared in Example 5 has the best performance.

[0069] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention.

Claims

1. A plastic compounding auxiliary agent, characterized in that: It is composed of the following components in parts by weight: Plasticizer: 30-50 parts; heat stabilizer: 3-4 parts; Revonox 420 antioxidant: 1-2 parts; light stabilizer: 1-2 parts; flame retardant: 1-2 parts.

2. A plastic compounding auxiliary agent according to claim 1, characterized in that, The plasticizer is composed of poly(hexanediol succinate) and diheptyl isosorbide in a mass ratio of 1:(1.5-2).

3. A plastic compounding auxiliary agent according to claim 1, characterized in that, The heat stabilizer is composed of polyurea and bismaleic acid pentaerythritol ester in a mass ratio of 1: (1.3-1.5).

4. A plastic compounding auxiliary agent according to claim 1, characterized in that, The light stabilizer is composed of salicylate and zinc oxide in a mass ratio of 1: (0.95-1).

5. A method for preparing a plastic compounding auxiliary agent, characterized in that: The following steps are involved: S1 mixture preparation: plasticizer, heat stabilizer, Revonox 420 antioxidant and flame retardant are prepared in proportion, and then added into a mixer in sequence, and then anhydrous methanol is added, and heated and stirred to react, and a mixture is obtained after the reaction is completed; S2: Preparation of plastic compounding auxiliary agent: Cooling and filtering the mixture obtained in step S1, collecting the filter cake, washing and drying the filter cake to obtain a block of plastic compounding auxiliary agent; The block-shaped plastic compounding additive is added into a granulator, and then the resin is added, and then the mixture is heated and melted and extruded to form granular plastic compounding additive, and the granular plastic compounding additive is obtained after sieving.

6. The method for preparing a plastic compounding auxiliary agent according to claim 5, characterized in that: In the S1 mixture preparation step, the mass ratio of the plasticizer to the anhydrous methanol is 1:(15-20).

7. The method for preparing a plastic compounding auxiliary agent according to claim 5, characterized in that: In the step of preparing the mixture S1, the temperature during the heating and stirring process is 55-65° C.; and the stirring speed is 500-800 r / min.

8. The method for preparing a plastic compounding auxiliary agent according to claim 5, characterized in that: In the step S2 of preparing the plastic compounding auxiliary agent, the mass ratio of the resin to the block-shaped plastic compounding auxiliary agent is 1:(18-23).

9. The method for preparing a plastic compounding auxiliary agent according to claim 5, characterized in that: In the step of preparing the S2 plastic compounding auxiliary agent, the temperature during the heating and melting process is 100-120°C.

10. The method for preparing a plastic compounding auxiliary agent according to claim 5, characterized in that: In the step S2 of preparing the plastic compounding auxiliary agent, the particle size of the plastic compounding auxiliary agent obtained after sieving is 50 to 60 μm.

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