Reinforced plastic master batch and preparation method thereof
By combining multiple functional masterbatches and processing them into granules separately, the problem of mutual loss of performance during plastic modification is solved, high-performance and multifunctional plastic modification is achieved, and the strengthening and toughening effects and design flexibility of plastics are improved.
Patent Information
- Application Number
- CN202410283967.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2025-09-16
AI Technical Summary
Existing technologies make it difficult to achieve high performance and multifunctionality in the plastic modification process, and there is a problem of mutual performance loss between different modification systems.
By using a combination of multiple functional masterbatches, and combining the filling modification of inorganic particles, glass fiber reinforcement modification and flame retardant reinforcement modification through separate processing into granules, the mutual loss of performance of the modified additives due to mutual shear wear and processing temperature differences is avoided, and reinforced plastic masterbatches are prepared.
It greatly improves the reinforcement, toughening and modification effect of plastics, realizes the optimized design of multiple performances, has design flexibility, and can quickly meet the multi-resin and multi-masterbatch joint injection molding needs of different customers.
Smart Images
Figure BDA0004738478410000061 
Figure BDA0004738478410000071
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of plastic modification and processing, and in particular to a reinforced plastic masterbatch and a preparation method thereof. Background Art
[0002] Plastic masterbatch is a concentrated form of resin containing an excessive amount of plastic additives. When manufacturing plastic products, the additives do not need to be added; only the masterbatch containing the excessive amount can be added in appropriate proportions. Therefore, plastic masterbatch is a new type of material specifically designed for polymer processing. A wide variety of products are available, including filler masterbatches, color masterbatches, flame retardant masterbatches, antistatic masterbatches, wear-resistant masterbatches, and multifunctional masterbatches.
[0003] At present, with the continuous expansion of the application fields of plastics, the requirements for their performance are getting higher and higher. Many application fields require plastic products to have multiple functions and excellent comprehensive performance such as high strength, high toughness, high temperature resistance, flame retardancy, thermal conductivity, and electrical conductivity. The preparation and processing of each modified material requires the addition of modified additives and auxiliaries of various materials and forms, which poses a great challenge to traditional plastic modification technology; the modification efficiency between different modification systems will have many technical difficulties such as mutual performance loss. In this regard, a technical solution is proposed to simultaneously achieve high performance and multifunctional modification of plastics, which has important practical significance and economic benefits. Summary of the Invention
[0004] In order to overcome the shortcomings of the above-mentioned technical defects, the present invention proposes an enhanced plastic masterbatch and a preparation method to avoid the problems of mutual loss of modification additives and processing temperature mismatch generated during the plastic enhancement and functional modification process, and to maximize the modification efficiency of modification additives and additives of different materials.
[0005] On the one hand, the present invention provides a reinforced plastic masterbatch, which comprises a masterbatch A, a masterbatch B, and a masterbatch C in a mass ratio of (60-80): (15-20): (10-20);
[0006] Calculated by mass, the masterbatch A comprises: 40-75 parts of PP resin, 15-30 parts of glass fiber, and 1-15 parts of toughening agent; calculated by mass, the masterbatch B comprises: 15-20 parts of PP resin, 5-10 parts of silicone, and 55-70 parts of flame retardant; calculated by mass, the masterbatch C comprises: 30-45 parts of PP resin, 25-40 parts of talc, 15-25 parts of calcium stearate, and 5-10 parts of silane coupling agent.
[0007] Furthermore, the PP resin has a melt index range of 60g-180g / 10min and a melting point of 40°C to 180°C.
[0008] Furthermore, the glass fibers include short fibers with a length of 0.1-10 mm and continuous long glass fibers.
[0009] Furthermore, the flame retardant is a brominated flame retardant and a phosphophenol flame retardant in a mass ratio of 1:(0.2-0.5).
[0010] Furthermore, the brominated flame retardant is one of an additive brominated flame retardant and a reactive brominated flame retardant.
[0011] In a specific embodiment, the brominated flame retardant can be one of 1,2-bis(2,4,6-tribromophenoxy)ethane, 2,4,6-tribromophenyl allyl ether, and tetrabromobisphenol A bis(2,3-dibromopropyl) ether; the reactive brominated flame retardant can be one of hydroxymethyl melamine, hydroxyethyl phosphate and its derivatives, dibromoneopentyl glycol and its ester derivatives, tribromoneopentyl alcohol, dibromobutanediol and its ester derivatives, and tetrabromobisphenol A.
[0012] Furthermore, the silane coupling agent is one or more of 3-acryloxypropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane, 3-[(2,3)-epoxypropyloxy]propylmethyldimethoxysilane, and γ-methacryloxypropylsilane.
[0013] Furthermore, the toughening agent is maleic anhydride grafted POE, and the grafting rate is 0.8-1%.
[0014] Further, the method comprises the following steps: S1. mixing PP resin, toughening agent and other additives in a mixer in accordance with a proportion, and then melt-blending and granulating the mixture through a twin-screw extruder to obtain a masterbatch A;
[0015] S2. After mixing PP resin, silicone, flame retardant and other additives in a mixer, move to an internal mixer for hot mixing, and then feed a single-screw extruder for melt extrusion and granulation to obtain B masterbatch;
[0016] S3. PP resin, talc, calcium stearate, and silane coupling agent were mixed in a mixer, and then melt-extruded and granulated using a single-screw extruder to obtain C masterbatch.
[0017] Furthermore, the temperature of each section from the barrel to the die of the twin-screw extruder is controlled at 230-265° C., and the screw speed is 150-180 rpm.
[0018] Furthermore, the mixing temperature of the internal mixer is 110-130°C, and the mixing time is 15-20 min; the screw speed of the single-screw extruder is 150-200 rpm, and the barrel temperature is 155-165°C.
[0019] In a specific embodiment, other additives include antioxidants, lubricants, compatibilizers, etc. The antioxidant can be at least one of a phenolic antioxidant, a phosphorus antioxidant, a thioether antioxidant, and a metal salt antioxidant; the dispersant can be at least one of ethylene bisstearamide, modified ethylene bisstearamide, silicone powder, polyamide wax, zinc stearate, and calcium stearate; the lubricant is one or more of ethylene-acrylic acid copolymer wax, pentaerythritol stearate, and E wax; these are all common knowledge known in the art, and as long as they are properly controlled, they will not have a negative impact on the present invention.
[0020] Beneficial effects: The present invention is composed of a combination of multiple functional masterbatches, combining the filling modification of inorganic particles, glass fiber reinforcement modification and flame retardant reinforcement modification. By processing them into particles separately, the mutual loss of modification efficiency caused by mutual shear wear between inorganic particles and glass fibers can be avoided, which greatly improves the reinforcement and toughening modification of PP; and the mutual loss of modification efficiency caused by the difference in processing temperature between glass fiber and flame retardant can be avoided, which greatly improves the reinforcement and flame retardant modification of PP. At the same time, the invented masterbatch has great design flexibility, and can be used for multi-resin and multi-masterbatch joint injection molding according to different customer requirements, so as to quickly and easily achieve the purpose requirements, thereby practicing the optimal design concept of multi-performance plastic modification formula and processing technology. DETAILED DESCRIPTION
[0021] In order to make those skilled in the art better understand the technical scheme of the present invention, the present invention is described in detail below in conjunction with specific embodiments. The experimental methods for which specific conditions are not specified in the following examples are usually based on conventional conditions or the conditions recommended by the manufacturer. The test materials used in the following examples, unless otherwise specified, are purchased from conventional biochemical reagent stores. Unless otherwise specified, percentages and parts are calculated by weight. Unless otherwise defined, all professional and scientific terms used in the text have the same meaning as those familiar to those skilled in the art. In addition, any method and material similar to or equivalent to the described content can be applied to the present invention. The preferred implementation methods and materials described in the text are only for demonstration purposes.
[0022] The endpoints of the ranges and any values disclosed herein are not limited to the precise ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and the individual point values can be combined with each other to obtain one or more new numerical ranges, which should be considered to be specifically disclosed herein.
[0023] Example 1 Preparation of Masterbatch A
[0024] Weigh 40 parts of PP resin, 20 parts of short fibers with a length of 0.1-10 mm, 1 part of maleic anhydride grafted POE, 0.1 part of antioxidant, and 5 parts of continuous long glass fiber. Put all the raw materials except the continuous long glass fiber into a high-speed mixer and mix them evenly. Then add the mixture into a twin-screw extruder through a hopper for melt blending and extrusion to prepare a composite melt. The temperature of each section from the barrel to the die of the twin-screw extruder is controlled at 230-265 ° C, the screw speed is 150-180 rpm, and the composite is The melt is directly extruded into the cavity of the impregnation mold through a die connected to the head of the twin-screw extruder. At the same time, the continuous long glass fiber enters the mold cavity through another die of the impregnation mold and is impregnated in the melt by the traction action of the guide roller in the mold cavity. The mold cavity temperature of the impregnation mold is controlled at 280°C, and the traction machine speed is controlled at 70 m / min. The glass fiber bundle after melt impregnation is pulled out of the mold cavity and, after cooling, is cut into long strip-shaped pellets with a length of 12 mm by a pelletizer, thereby obtaining the A masterbatch.
[0025] Example 2
[0026] The method of Example 1 is adopted, except that, by weight, the raw materials are 75 parts of PP resin, 15 parts of short fibers with a length of 0.1-10 mm, 15 parts of maleic anhydride grafted POE, 0.3 parts of antioxidant, and 10 parts of continuous long glass fibers.
[0027] Example 3
[0028] The method of Example 1 is adopted, except that, by weight, the raw materials are 60 parts of PP resin, 20 parts of short fibers with a length of 0.1-10 mm, 8 parts of maleic anhydride grafted POE, 0.5 parts of antioxidant, and 7 parts of continuous long glass fibers.
[0029] Example 4
[0030] Weigh 15 parts of PP resin, 10 parts of silicone, 60 parts of flame retardant, and 0.5 parts of lubricant, put them into a high-speed mixer and mix them evenly, then transfer them to an internal mixer for hot mixing. The mixing temperature of the internal mixer is 110-130°C, and the mixing time is 15-20 minutes. The obtained agglomerated blend is then fed into a single-screw extruder through a conical feeder, melt-extruded and granulated to obtain the B masterbatch; the screw speed of the single-screw extruder is 150-200 rpm, and the barrel temperature is 155-165°C.
[0031] Example 5
[0032] The method of Example 4 was adopted, except that, by weight, the raw materials were 20 parts of PP resin, 5 parts of silicone, 55 parts of flame retardant, and 2 parts of lubricant.
[0033] Example 6
[0034] The method of Example 4 was adopted, except that, by weight, the raw materials were 18 parts of PP resin, 10 parts of silicone, 70 parts of flame retardant, and 1 part of lubricant.
[0035] Example 7
[0036] 30 parts of PP resin, 40 parts of talc, 15 parts of calcium stearate, 5 parts of silane coupling agent, and 1 part of dispersant were weighed and put into a high-speed mixer and mixed evenly. Then, the mixture was fed into a single-screw extruder, melt-extruded and granulated to obtain the C masterbatch; the screw speed of the single-screw extruder was 150-200 rpm, and the barrel temperature was 155-165°C.
[0037] Example 8
[0038] The method of Example 7 was adopted, except that, by weight, the raw materials were 40 parts of PP resin, 25 parts of talc, 25 parts of calcium stearate, 3 parts of silane coupling agent, and 3 parts of dispersant.
[0039] Example 9
[0040] The method of Example 7 was adopted, except that, by weight, the raw materials were 45 parts of PP resin, 30 parts of talc, 20 parts of calcium stearate, 8 parts of silane coupling agent, and 2 parts of dispersant.
[0041] Examples 10-18 Reinforced Plastic Masterbatch
[0042] Reinforced plastic masterbatch is composed of three types of masterbatch: A, B, and C. The proportions of the three masterbatches are shown in the following table:
[0043] Table 1
[0044]
[0045]
[0046] The reinforced plastic masterbatch prepared in the above examples was directly injection molded, and then various performance tests were performed. At the same time, the injection test specimens obtained in Examples 10-12 were identical in composition and proportion, and were blended by a twin-screw extruder and then injection molded as comparative examples 1-3, and their performance was then tested. All performance test results are shown in Table 2
[0047] Tensile strength, MPa <![CDATA[Izod impact strength, kJ / m 2 > Vertical combustion level Example 10 40.5 19.3 V-0 Comparative Example 1 22.7 10.6 V-0 Example 11 34.2 16.7 V-0 Comparative Example 2 17.3 9.4 V-0 Example 12 38.4 17.2 V-0 Comparative Example 3 20.7 8.8 V-0 Example 13 39.3 18.9 V-0 Example 14 48.6 20.6 V-0 Example 15 50.4 20.8 V-0 Example 16 44.1 19.8 V-0 Example 17 41.9 19.5 V-0 Example 18 46.8 20.1 V-0
[0048] It can be seen that the reinforced plastic masterbatch of the present invention has good mechanical strength, toughness and flame retardant effect after direct injection molding, and under the condition that the components and proportions are exactly the same, the tensile strength, notched impact strength and flame retardant properties of its plastic products are significantly better than those of the products processed by a twin-screw extruder and then injection molded.
[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, those skilled in the art can make various similar expressions without violating the purpose and claims of the present invention. Such changes fall within the scope of protection of the present invention.
Claims
1. Reinforced plastic masterbatch, characterized by: The masterbatch is composed of masterbatch A, masterbatch B and masterbatch C in a mass ratio of (60-80):(15-20):(10-20); Calculated by mass, the masterbatch A comprises: 40-75 parts of PP resin, 15-30 parts of glass fiber, and 1-15 parts of toughening agent; calculated by mass, the masterbatch B comprises: 15-20 parts of PP resin, 5-10 parts of silicone, and 55-70 parts of flame retardant; calculated by mass, the masterbatch C comprises: 30-45 parts of PP resin, 25-40 parts of talc, 15-25 parts of calcium stearate, and 3-8 parts of silane coupling agent.
2. The reinforced plastic masterbatch according to claim 1, characterized in that: The PP resin has a melt index range of 60g-180g / 10min and a melting point of 40°C to 180°C.
3. The reinforced plastic masterbatch according to claim 1, characterized in that: The glass fibers include short fibers with a length of 0.1-10 mm and continuous long glass fibers.
4. The reinforced plastic masterbatch according to claim 1, characterized in that: The flame retardant is a brominated flame retardant and a phosphophenol flame retardant in a mass ratio of 1:(0.2-0.5).
5. The reinforced plastic masterbatch according to claim 4, characterized in that: Brominated flame retardants are one of the additive brominated flame retardants and reactive brominated flame retardants.
6. The reinforced plastic masterbatch according to claim 4, characterized in that: The silane coupling agent is one or more of 3-acryloxypropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane, 3-[(2,3)-epoxypropyloxy]propylmethyldimethoxysilane, and γ-methacryloxypropylsilane.
7. The reinforced plastic masterbatch according to claim 4, characterized in that: The toughening agent is maleic anhydride grafted POE, and the grafting rate is 0.8-1%.
8. The method for preparing the reinforced plastic masterbatch according to any one of claims 1 to 7, characterized in that The following steps are involved: S1. The PP resin, glass fiber, toughening agent and other additives are mixed in a mixer according to the ratio, and then melt-blended and granulated by a twin-screw extruder to obtain a masterbatch A; S2. After mixing PP resin, silicone, flame retardant and other additives in a mixer, move to an internal mixer for hot mixing, and then feed a single-screw extruder for melt extrusion and granulation to obtain B masterbatch; S3. PP resin, talc, calcium stearate, silane coupling agent and other additives are mixed in a mixer, and then melt-extruded and granulated through a single-screw extruder to obtain C masterbatch.
9. The preparation method according to claim 8, characterized in that: The temperature of each section from the barrel to the die of the twin-screw extruder is controlled at 230-265° C., and the screw speed is 150-180 rpm.
10. The preparation method according to claim 8, characterized in that: The mixing temperature of the internal mixer is 110-130° C., and the mixing time is 15-20 min. The screw speed of the single-screw extruder is 150-200 rpm, and the barrel temperature is 155-165° C.