CN112574579A - Scratch-resistant thermoplastic elastomer and preparation method thereof - Google Patents
Scratch-resistant thermoplastic elastomer and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L91/06—Waxes
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
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- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C08L2207/04—Thermoplastic elastomer
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Abstract
The invention discloses a scratch-resistant thermoplastic elastomer and a preparation method thereof in the technical field of thermoplastic elastomers, wherein the scratch-resistant thermoplastic elastomer comprises the following raw materials in parts by weight: 50-200 parts of hydrogenated styrene thermoplastic elastomer, 20-400 parts of plasticizing system, 40-200 parts of plasticizing reinforced resin, 0-200 parts of filling system, 0.2-2 parts of antioxidant, 0.2-40 parts of scratch-resistant agent and 0-30 parts of colorant; the thermoplastic elastomer material prepared by utilizing the hydrogenated styrene thermoplastic elastomer, the plasticizing system, the plasticizing reinforced resin, the filling system, the antioxidant, the scratch resistant agent and the coloring system according to a certain proportion has good surface scratch resistance, soft touch and good mechanical properties, avoids whitening and mark retention caused by interface damage in the scraping process, and has wide application prospects in the fields of daily supplies, office automation, automobile accessories, household appliances, electric tools and the like.
Description
Technical Field
The invention relates to the technical field of thermoplastic elastomers, in particular to a scratch-resistant thermoplastic elastomer and a preparation method thereof.
Background
With the rapid development of thermoplastic elastomers applied to the fields of daily necessities, office automation, automobile accessories, household appliances, electric tools and the like, materials meet the requirements of appearance, touch and mechanical properties, and meanwhile, more and more applications begin to pay attention to good scratch resistance of products. At present, composite materials are widely used in automotive interior products. However, most of the composite materials have poor toughness and scratch resistance, and in order to make the thermoplastic elastomer material better meet the requirements of automotive interior and other fields, especially the requirements of high-grade automotive interior product materials, the improvement of the thermoplastic elastomer to improve the scratch resistance is urgently needed. In practical applications, in order to reduce the cost and improve the market competitiveness of products, the thermoplastic elastomer is generally filled with inorganic materials such as calcium carbonate, talcum powder, pottery clay and barium sulfate. The addition of the filling system can not only reduce the cost, but also improve the heat-resistant temperature of the material.
At present, because an interface exists between a filled inorganic component and a polymer matrix, the interface is the most easily damaged part of two phases, and when the content of the inorganic material exceeds a certain content, the material is easy to have the defects of scraping, whitening, easy surface abrasion, mark retention and the like, poor appearance and the like; in order to solve the problems of scratch whitening, easy surface abrasion and mark leaving, and the like, the content of inorganic materials is generally selected to be reduced in the prior art, when the dosage of the inorganic materials is less than 10%, the scratch whitening is not obvious, but the cost is the cost of the cost performance of the materials and a certain degree of market competition space.
Therefore, a scratch-resistant thermoplastic elastomer is proposed to solve the above problems.
Disclosure of Invention
The invention aims to provide a scratch-resistant thermoplastic elastomer and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following scheme to realize the following steps: the scratch-resistant thermoplastic elastomer comprises the following raw materials in parts by weight: 50-200 parts of hydrogenated styrene thermoplastic elastomer, 20-400 parts of plasticizing system, 40-200 parts of plasticizing reinforced resin, 0-200 parts of filling system, 0.2-2 parts of antioxidant, 0.2-40 parts of scratch-resistant agent and 0-30 parts of colorant.
Preferably, the hydrogenated styrenic thermoplastic elastomer is one or more blends of styrene-butadiene-styrene block copolymer, styrene-ethylene/butylene-styrene block copolymer, styrene-ethylene/propylene-styrene block copolymer, and styrene-ethylene/propylene-styrene block copolymer. Further, the hydrogenated styrene-based elastomer is a styrene-ethylene/butylene-styrene block copolymer formed by hydrogenation, which is abbreviated as SEBS. Preferably, the molecular weight Mn of the selected SEBS is not less than 10000, the hydrogenation degree is not less than 98%, and the PS block proportion is 25% -60%. The carbon-carbon double bond of the butadiene section in the SEBS is saturated by hydrogenation, and the SEBS has good weather resistance, heat resistance, compression deformation resistance and excellent mechanical property. Preferably, the SEBS is a soft SEBS with a linear structure and low viscosity, wherein the mass ratio of the S component to the B component is 30/70, the tensile strength of the material is 26.5MPa, and the elongation at break is 480%.
Preferably, the plasticizing system is filling oil, the flash point of the filling oil is more than 130 ℃, and the kinematic viscosity is more than 5mm under the condition of 40 DEG C2And/s, wherein the filling oil is one or more of paraffin oil, naphthenic oil, straight-chain paraffin oil and aromatic hydrocarbon oil.
Preferably, the plasticizing and reinforcing resin is one or more of polypropylene, polyethylene, polyolefin elastomer, polystyrene and a copolymer of styrene and butadiene. Furthermore, when the plasticizing reinforced resin contains the copolymerized polypropylene, the content of the copolymerized polypropylene is more than or equal to 10 wt%; when the plasticizing reinforced resin contains homopolymerized polypropylene, the content of the homopolymerized polypropylene is more than or equal to 10 wt%; when the plasticizing reinforced resin contains polyethylene, the content of the polyethylene is more than or equal to 20 wt%; the melt index of the copolymerized polypropylene is 1-40g/10 min; the melt index of the homopolymerized polypropylene is 1-40g/10 min; the polyethylene has a melt index of 5-50g/10 min. Further, the polymerized units of the copolymerized polypropylene comprise at least one of ethylene, butene, hexene and octene; the flow index of the homopolymerized polypropylene is 3-30g/10min under the condition of 230 ℃/2.16Kg, and the crystallinity is more than or equal to 30 percent; the polyethylene comprises at least one of high density polyethylene, low density polyethylene and linear low density polyethylene.
Preferably, the filling system is at least one of diatomite, argil, calcium carbonate, talcum powder, mica, wollastonite and barium sulfate. Furthermore, the particle size of the tabular wollastonite is 3000-5000 meshes, the average diameter of the tabular wollastonite is 50-200nm, and the average length of the tabular wollastonite is 10-20 μm.
Preferably, the antioxidant comprises a hindered phenol main antioxidant and a phosphite ester auxiliary antioxidant, wherein the hindered phenol main antioxidant is a 1076 antioxidant or a 1010 antioxidant, and the phosphite ester auxiliary antioxidant is a 168 antioxidant or a 619F antioxidant.
Preferably, the scratch resistant agent is polysiloxane.
The invention also provides a preparation method of the scratch-resistant thermoplastic elastomer, which comprises the following steps:
(1) adding hydrogenated styrene thermoplastic elastomer and a plasticizing system into a high-speed heating mixer, stirring at a high speed for 2-40min, and standing for 2-4h to obtain a styrene elastomer mixture;
(2) sequentially adding the plasticizing reinforced resin, the filling system, the antioxidant, the scratch-resistant agent and the colorant into a high-speed heating mixer, keeping the rotating speed of 900-1500r/min, and stirring for 1-8min to obtain a premix;
(3) and (2) putting the premix into an extruder, controlling the processing temperature of a plasticizing melting area and a melt conveying area, continuously and quantitatively adding the premix in the first section of a solid conveying area of the extruder by using a metering pump, vacuumizing the tail end of the extruder by using a vacuum pump, and melting, extruding and granulating the premix by using the extruder to obtain the target product.
Preferably, in the step (3), the temperature of the first section is not more than 120 ℃, and the melt blending extrusion temperature is 150-260 ℃.
Preferably, in the step (3), the extruder is a co-rotating parallel twin-screw extruder, the feeding rotating speed of the extruder is 15-80r/min, the screw rotating speed is 200-500r/min, and the length-diameter ratio of the screw is 55-64.
The invention has the beneficial effects that:
by adding polysiloxane, the invention has excellent chemical stability and heat resistance, and can be used as a processing aid and a surface modifier of thermoplastic materials, thereby improving the processing fluidity and glossiness and reducing the friction coefficient;
the thermoplastic elastomer material is prepared by processing hydrogenated styrene thermoplastic elastomer, a plasticizing system, plasticizing reinforced resin, a filling system, an antioxidant, a scratch-resistant agent and a coloring agent according to a certain proportion, has soft touch and good mechanical property, is not easy to deform, has good thermoplasticity and adjustable hardness range, reduces the defects of scraping whitening, easy surface abrasion and mark retention and the like in the use process of the material, has poor appearance and the like, can meet the requirements of high filling and low cost required in market competition, can meet the scratch-resistant property of a certain degree increasingly required by people, can be recycled, can not obviously reduce the scratch-resistant property and the mechanical property, is nontoxic and harmless to human bodies and environment, and can be used for manufacturing various interior thermoplastic elastomer parts of passenger vehicles;
according to the invention, through reasonable formula and production process design, the hydrogenated styrene thermoplastic elastomer and the plasticizing system which can be plasticized are added into a high-speed heating mixer to be stirred at a high speed to prepare a styrene elastomer mixture which is uniformly filled, then the plasticizing reinforced resin, the filling system, the antioxidant, the scratch-resistant agent and the colorant are sequentially added to be stirred and heated, and finally, the mixture is extruded and processed, and the performance of the prepared product is excellent by controlling the temperature of the first section not to exceed 120 ℃ and the melting blending extrusion temperature to be 150-260 ℃;
the thermoplastic elastomer material prepared by the invention can be processed by injection molding and extrusion, can be bonded by secondary injection molding or can be used for directly injection molding a workpiece, and successfully overcomes the defect of the scratch resistance of the elastomer commonly used in the current market to the material; the obtained product has adjustable performance, can be used as a medium-high-end automobile interior trim part, plays a role in skid resistance, vibration reduction and noise reduction when contacting hard objects such as metal, glass and the like, and has the characteristics of scratch resistance, low specific gravity, simple processing, recycling, high filling amount and the like.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The scratch-resistant thermoplastic elastomer comprises the following raw materials in parts by weight: 100 parts of hydrogenated styrene thermoplastic elastomer, 200 parts of plasticizing system, 135 parts of plasticizing reinforced resin, 140 parts of filling system, 1 part of antioxidant, 10 parts of scratch-resistant agent and 6 parts of colorant.
The hydrogenated styrene thermoplastic elastomer adopts styrene-ethylene/butylene-styrene block copolymer, namely SEBS YH-503T; the plasticizing system adopts paraffin oil PIONIER 1535; the plasticizing reinforced resin is polypropylene, and the filling system is 800-mesh calcium carbonate; the antioxidant adopts 1010 antioxidant and 168 antioxidant, and the 1010 antioxidant and the 168 antioxidant are mixed according to the mass ratio of 1: 2; the scratch-resistant agent is polysiloxane.
The preparation method of the scratch-resistant thermoplastic elastomer specifically comprises the following steps:
(1) adding hydrogenated styrene thermoplastic elastomer and a plasticizing system into a high-speed heating mixer, stirring at a high speed for 30min, keeping the rotating speed at 1200r/min, and standing for 3h to obtain a styrene elastomer mixture;
(2) sequentially adding the plasticizing reinforced resin, the filling system, the antioxidant, the scratch-resistant agent and the colorant into a high-speed heating mixer, keeping the rotating speed at 900r/min, keeping the temperature at 70 ℃, and stirring for 5min to obtain a premix;
(3) and (2) putting the premix into an extruder, controlling the processing temperature of a plasticizing melting zone and a melt conveying zone, continuously and quantitatively adding the premix in the first section of a solid conveying zone of the extruder by using a metering pump, vacuumizing the tail end of the extruder by using a vacuum pump, wherein the vacuum pressure is lower than 0.01MPa, and melting, extruding and granulating the premix by using the extruder to obtain the target product.
In the step (3), the temperature of the first section does not exceed 120 ℃, and the melt blending extrusion temperature is 150 ℃; the extruder is a co-rotating parallel double-screw extruder, the feeding speed is 15r/min, the screw rotating speed is 300r/min, and the length-diameter ratio of the screw is 55.
Example 2
The scratch-resistant thermoplastic elastomer comprises the following raw materials in parts by weight: 100 parts of hydrogenated styrene thermoplastic elastomer, 150 parts of plasticizing system, 85 parts of plasticizing reinforced resin, 140 parts of filling system, 1 part of antioxidant, 8 parts of silicone powder and 6 parts of colorant.
The hydrogenated styrene thermoplastic elastomer adopts styrene-ethylene/butylene-styrene block copolymer, namely SEBS YH-503T; the plasticizing system adopts paraffin oil PIONIER 1535; the plasticizing reinforced resin is polypropylene, and the filling system is 800-mesh calcium carbonate; the antioxidant adopts 1010 antioxidant and 168 antioxidant, and the 1010 antioxidant and the 168 antioxidant are mixed according to the mass ratio of 1: 2; the silicone powder is a commercial common molecular weight organic silicone.
The preparation method of the scratch-resistant thermoplastic elastomer specifically comprises the following steps:
(1) adding hydrogenated styrene thermoplastic elastomer and a plasticizing system into a high-speed heating mixer, stirring at a high speed for 30min, keeping the rotating speed at 1200r/min, and standing for 3h to obtain a styrene elastomer mixture;
(2) sequentially adding the plasticized reinforced resin, the filling system, the antioxidant, the silicone powder and the colorant into a high-speed heating mixer, keeping the rotating speed at 900r/min, keeping the temperature at 70 ℃, and stirring for 5min to obtain a premix;
(3) and (2) putting the premix into an extruder, controlling the processing temperature of a plasticizing melting zone and a melt conveying zone, continuously and quantitatively adding the premix in the first section of a solid conveying zone of the extruder by using a metering pump, vacuumizing the tail end of the extruder by using a vacuum pump, wherein the vacuum pressure is lower than 0.01MPa, and melting, extruding and granulating the premix by using the extruder to obtain the target product.
In the step (3), the temperature of the first section does not exceed 120 ℃, and the melt blending extrusion temperature is 150 ℃; the extruder is a co-rotating parallel double-screw extruder, the feeding speed is 15r/min, the screw rotating speed is 300r/min, and the length-diameter ratio of the screw is 55.
Example 3
The scratch-resistant thermoplastic elastomer comprises the following raw materials in parts by weight: 100 parts of hydrogenated styrene thermoplastic elastomer, 200 parts of plasticizing system, 145 parts of plasticizing reinforced resin, 140 parts of filling system, 1 part of antioxidant, 3 parts of scratch-resistant agent and 6 parts of colorant.
The hydrogenated styrene thermoplastic elastomer adopts styrene-ethylene/butylene-styrene block copolymer, namely SEBS YH-503T; the plasticizing system adopts paraffin oil PIONIER 1535; the plasticizing reinforced resin is polypropylene, and the filling system is talcum powder; the antioxidant adopts 1010 antioxidant and 168 antioxidant, and the 1010 antioxidant and the 168 antioxidant are mixed according to the mass ratio of 1: 2; the scratch-resistant agent is polysiloxane.
The preparation method of the scratch-resistant thermoplastic elastomer specifically comprises the following steps:
(1) adding hydrogenated styrene thermoplastic elastomer and a plasticizing system into a high-speed heating mixer, stirring at a high speed for 25min, keeping the rotating speed at 1400r/min, and standing for 2.5h to obtain a styrene elastomer mixture;
(2) sequentially adding the plasticizing reinforced resin, the filling system, the antioxidant, the scratch-resistant agent and the colorant into a high-speed heating mixer, keeping the rotation speed at 1200r/min and the temperature at 70 ℃, and stirring for 5min to obtain a premix;
(3) and (2) putting the premix into an extruder, controlling the processing temperature of a plasticizing melting zone and a melt conveying zone, continuously and quantitatively adding the premix in the first section of a solid conveying zone of the extruder by using a metering pump, vacuumizing the tail end of the extruder by using a vacuum pump, wherein the vacuum pressure is lower than 0.01MPa, and melting, extruding and granulating the premix by using the extruder to obtain the target product.
In the step (3), the temperature of the first section does not exceed 120 ℃, and the melt blending extrusion temperature is 150 ℃; the extruder is a co-rotating parallel double-screw extruder, the feeding speed is 15r/min, the screw rotating speed is 300r/min, and the length-diameter ratio of the screw is 55.
Example 4
The scratch-resistant thermoplastic elastomer comprises the following raw materials in parts by weight: 100 parts of hydrogenated styrene thermoplastic elastomer, 200 parts of plasticizing system, 135 parts of plasticizing reinforced resin, 140 parts of filling system, 1 part of antioxidant, 18 parts of scratch-resistant agent and 6 parts of colorant.
The hydrogenated styrene thermoplastic elastomer adopts styrene-ethylene/butylene-styrene block copolymer, namely SEBS YH-503T; the plasticizing system adopts paraffin oil PIONIER 1535; the plasticizing reinforced resin is polypropylene, and the filling system is talcum powder; the antioxidant adopts 1010 antioxidant and 168 antioxidant, and the 1010 antioxidant and the 168 antioxidant are mixed according to the mass ratio of 1: 2; the scratch-resistant agent is polysiloxane.
The preparation method of the scratch-resistant thermoplastic elastomer specifically comprises the following steps:
(1) adding hydrogenated styrene thermoplastic elastomer and a plasticizing system into a high-speed heating mixer, stirring at a high speed for 10min, keeping the rotating speed at 1300r/min, and standing for 3h to obtain a styrene elastomer mixture;
(2) sequentially adding the plasticizing reinforced resin, the filling system, the antioxidant, the scratch-resistant agent and the colorant into a high-speed heating mixer, keeping the rotating speed at 1500r/min and the temperature at 70 ℃, and stirring for 5min to obtain a premix;
(3) and (2) putting the premix into an extruder, controlling the processing temperature of a plasticizing melting zone and a melt conveying zone, continuously and quantitatively adding the premix in the first section of a solid conveying zone of the extruder by using a metering pump, vacuumizing the tail end of the extruder by using a vacuum pump, wherein the vacuum pressure is lower than 0.01MPa, and melting, extruding and granulating the premix by using the extruder to obtain the target product.
In the step (3), the temperature of the first section does not exceed 120 ℃, and the melt blending extrusion temperature is 150 ℃; the extruder is a co-rotating parallel double-screw extruder, the feeding speed is 15r/min, the screw rotating speed is 300r/min, and the length-diameter ratio of the screw is 55.
Example 5
The scratch-resistant thermoplastic elastomer comprises the following raw materials in parts by weight: 100 parts of hydrogenated styrene thermoplastic elastomer, 200 parts of plasticizing system, 135 parts of plasticizing reinforced resin, 70 parts of talcum powder, 70 parts of wollastonite, 1 part of antioxidant, 18 parts of scratch-resistant agent and 6 parts of colorant.
The hydrogenated styrene thermoplastic elastomer adopts styrene-ethylene/butylene-styrene block copolymer, namely SEBS YH-503T; the plasticizing system adopts paraffin oil PIONIER 1535; the plasticizing reinforced resin is polypropylene, and the filling system is talcum powder; the antioxidant adopts 1076 antioxidant and 619F antioxidant, and the 1076 antioxidant and the 619F antioxidant are mixed according to the mass ratio of 1: 1; the scratch-resistant agent is polysiloxane.
The preparation method of the scratch-resistant thermoplastic elastomer specifically comprises the following steps:
(1) adding hydrogenated styrene thermoplastic elastomer and a plasticizing system into a high-speed heating mixer, stirring at a high speed for 10min, keeping the rotating speed at 1300r/min, and standing for 3h to obtain a styrene elastomer mixture;
(2) sequentially adding the plasticized reinforced resin, the talcum powder, the wollastonite, the antioxidant, the scratch-resistant agent and the colorant into a high-speed heating mixer, keeping the rotating speed at 1500r/min and the temperature at 70 ℃, and stirring for 5min to obtain a premix;
(3) and (2) putting the premix into an extruder, controlling the processing temperature of a plasticizing melting zone and a melt conveying zone, continuously and quantitatively adding the premix in the first section of a solid conveying zone of the extruder by using a metering pump, vacuumizing the tail end of the extruder by using a vacuum pump, wherein the vacuum pressure is lower than 0.01MPa, and melting, extruding and granulating the premix by using the extruder to obtain the target product.
In the step (3), the temperature of the first section does not exceed 120 ℃, and the melt blending extrusion temperature is 150 ℃; the extruder is a co-rotating parallel double-screw extruder, the feeding speed is 15r/min, the screw rotating speed is 300r/min, and the length-diameter ratio of the screw is 55.
Result detection
1. The test method comprises the following steps: tensile strength, the measurement standard is ISO 37-2, and the tensile test speed is 500 mm/min; the tearing strength is measured by an ISO 34-1 method B, and a right-angle test sample without a cut is selected for testing; scratch resistance rating: evaluated according to the color fastness to rubbing standard GB/T3920-2008. Firstly, an elastomer material is injected into a square plate with the thickness of 5mm multiplied by 50mm multiplied by 140mm, after the square plate is placed for 24 hours, a scraping experiment is carried out by adopting a dry rubbing cloth method, a round rubbing head is adopted as the rubbing head, a layer of cotton rubbing cloth is coated on the rubbing head, the downward pressure is applied to the rubbing head within 9 +/-0.2N, and after the square plate is scraped for a certain number of times, the surface scratches of the square plate are evaluated by using a two-dimensional microscope. The scratch resistance rating of elastomeric materials is divided into five grades according to the degree of scratch. The larger the number, the more slight the scratch, representing a better scratch resistance rating. Specific detection results are shown in table 1.
TABLE 1 measurement results
| Detecting items | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Hardness, Shore A | 86 | 79 | 86 | 88 | 89 |
| Tensile strength, Mpa | 6.3 | 10.3 | 8.7 | 5.8 | 5.4 |
| Elongation at break,% | 588 | 822 | 809 | 511 | 563 |
| Tear Strength, KN/M | 34 | 45 | 41 | 35 | 33 |
| Scratch resistance rating | 2 | 2 | 3 | 4 | 5 |
As can be seen from the above table, the scratch resistance of the elastomer materials prepared in examples 4 and 5 of the present invention is better than that of other examples, and whether the scratch resistance agent is added or not has a great influence on the scratch resistance of the elastomer materials can be seen from examples 1 to 3; combining with examples 1-5, it can be seen that the cost performance of the elastomer is better when talc powder is used in the filling component or the talc powder is used in combination with wollastonite. The added parts of the scratch-resistant agent have great influence on the mechanical property and the scratch resistance. The actual operation should be selected and designed according to the product application.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not exhaustive and do not limit the method of making a high strength caliper seal to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The scratch-resistant thermoplastic elastomer is characterized by comprising the following raw materials in parts by weight: 50-200 parts of hydrogenated styrene thermoplastic elastomer, 20-400 parts of plasticizing system, 40-200 parts of plasticizing reinforced resin, 0-200 parts of filling system, 0.2-2 parts of antioxidant, 0.2-40 parts of scratch-resistant agent and 0-30 parts of colorant.
2. The scratch resistant thermoplastic elastomer according to claim 1, wherein the hydrogenated styrenic thermoplastic elastomer is one or more blends of styrene-butadiene-styrene block copolymer, styrene-ethylene/butylene-styrene block copolymer, styrene-ethylene/propylene-styrene block copolymer, styrene-ethylene/propylene-styrene block copolymer.
3. The scratch-resistant thermoplastic elastomer as claimed in claim 1, wherein the plasticization system is an extender oil, the extender oil has a flash point of more than 130 ℃ and a kinematic viscosity of more than 5mm at 40 ℃2And/s, wherein the filling oil is one or more of paraffin oil, naphthenic oil, straight-chain paraffin oil and aromatic hydrocarbon oil.
4. The scratch-resistant thermoplastic elastomer as claimed in claim 1, wherein the plasticizing-reinforcing resin is one or more blends of polypropylene, polyethylene, polyolefin elastomer, polystyrene, and styrene-butadiene copolymer.
5. The scratch resistant thermoplastic elastomer of claim 1, wherein said filler system is at least one of diatomaceous earth, china clay, calcium carbonate, talc, mica, wollastonite, and barium sulfate.
6. The scratch-resistant thermoplastic elastomer as claimed in claim 1, wherein the antioxidant comprises hindered phenol primary antioxidant and phosphite ester secondary antioxidant, the hindered phenol primary antioxidant is 1076 antioxidant or 1010 antioxidant, and the phosphite ester secondary antioxidant is 168 antioxidant or 619F antioxidant.
7. The scratch resistant thermoplastic elastomer of claim 1, wherein said scratch resistant agent is a polysiloxane.
8. The process for preparing a scratch resistant thermoplastic elastomer, according to any one of claims 1 to 7, characterized in that the process comprises the following steps:
(1) adding hydrogenated styrene thermoplastic elastomer and a plasticizing system into a high-speed heating mixer, stirring at a high speed for 2-40min, and standing for 2-4h to obtain a styrene elastomer mixture;
(2) sequentially adding the plasticizing reinforced resin, the filling system, the antioxidant, the scratch-resistant agent and the colorant into a high-speed heating mixer, keeping the rotating speed of 900-1500r/min, and stirring for 1-8min to obtain a premix;
(3) and (2) putting the premix into an extruder, controlling the processing temperature of a plasticizing melting area and a melt conveying area, continuously and quantitatively adding the premix in the first section of a solid conveying area of the extruder by using a metering pump, vacuumizing the tail end of the extruder by using a vacuum pump, and melting, extruding and granulating the premix by using the extruder to obtain the target product.
9. The method for preparing a scratch resistant thermoplastic elastomer as claimed in claim 8, wherein in the step (3), the temperature of the first stage is not more than 120 ℃, and the melt blending extrusion temperature is 150 ℃ to 260 ℃.
10. The method for preparing the scratch resistant thermoplastic elastomer as claimed in claim 8, wherein in the step (3), the extruder is a co-rotating parallel twin-screw extruder, the feeding speed is 15-80r/min, the screw speed is 200-500r/min, and the length-diameter ratio of the screw is 55-64.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113501980A (en) * | 2021-08-03 | 2021-10-15 | 海信视像科技股份有限公司 | Low-friction noise material, noise-reducing master batch and preparation method thereof |
| CN114316496A (en) * | 2021-12-28 | 2022-04-12 | 南通普力马弹性体技术有限公司 | High-filling scratch-resistant extrusion-grade thermoplastic elastomer material and preparation method thereof |
| CN115093668A (en) * | 2022-04-23 | 2022-09-23 | 上海方田弹性体有限公司 | Thermoplastic elastomer, preparation method and biochemical reaction pipeline prepared from thermoplastic elastomer |
| CN115093668B (en) * | 2022-04-23 | 2024-03-26 | 上海方田弹性体有限公司 | Thermoplastic elastomer, preparation method and biochemical reaction pipeline prepared from thermoplastic elastomer |
| CN116120672A (en) * | 2022-12-29 | 2023-05-16 | 会通特种材料科技有限公司 | Ultrahigh-fluidity thermoplastic elastomer for automobile parts and preparation method thereof |
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