CN110964247B - Halogen-free flame-retardant reinforced polypropylene and preparation method thereof - Google Patents
Halogen-free flame-retardant reinforced polypropylene and preparation method thereof Download PDFInfo
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- CN110964247B CN110964247B CN201911151532.4A CN201911151532A CN110964247B CN 110964247 B CN110964247 B CN 110964247B CN 201911151532 A CN201911151532 A CN 201911151532A CN 110964247 B CN110964247 B CN 110964247B
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- C—CHEMISTRY; METALLURGY
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
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- C—CHEMISTRY; METALLURGY
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
- C08K5/34928—Salts
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- C—CHEMISTRY; METALLURGY
- 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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
- C08K5/523—Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds
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- C—CHEMISTRY; METALLURGY
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- C—CHEMISTRY; METALLURGY
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
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- C—CHEMISTRY; METALLURGY
- 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
- C08K3/02—Elements
- C08K2003/026—Phosphorus
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- C—CHEMISTRY; METALLURGY
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
Abstract
The invention discloses a halogen-free flame-retardant reinforced polypropylene with high electric leakage resistance, which comprises the following components in percentage by weight: 54.5% -64.8% of polypropylene; 10% -15% of glass fiber; 25% -30% of flame retardant; 0.2 to 0.5 percent of synergist; the invention also discloses a preparation method of the halogen-free flame-retardant reinforced polypropylene with high electric leakage resistance; the invention solves the problem that the polypropylene flame-retardant material has high flame retardance, high electrical insulation and high strength which are difficult to meet simultaneously, and the excellent flame retardance and electrical property of the polypropylene flame-retardant material can replace ABS resin, PC/ABS alloy and the like to be used for producing electronic and electrical products such as sockets, angle connectors, wiring terminals, electrical panels, wiring boards and the like.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to halogen-free flame-retardant reinforced polypropylene and a preparation method thereof.
Background
The plastic part can locally form an electric field at the moment when the circuit is switched on and off, and the nonuniformity of the electric field can cause flashover discharge and heat generation. Under the combined action of an electric field and heat, the surface of the insulating material is carbonized, the carbide resistance is low, the electric field intensity formed by the electrode tip to which a voltage is applied is increased, and flashover discharge is more likely to occur. The process is repeated until the surface insulation is damaged, a conductive channel is formed, electric leakage is generated, and the electric insulation performance of the material is damaged.
The comparative tracking index (CTI value) is an index for measuring the tracking sensitivity of a material, and refers to the highest voltage value of the surface of the material which can withstand 50 drops of electrolyte under a certain voltage condition without forming tracking. In practical applications, if the CTI value is greater than 400V, the material has sufficient tracking resistance and electrical insulation.
Although most of polymers have high electrical insulation performance, when the polymers are used as engineering materials, the polymers need to be added with related performances such as glass fiber, carbon black, flame retardant, toughening agent and processing aid, so that the electrical insulation performance is reduced. In particular, the flame retardant performance and the electrical insulation performance of the material can be seriously reduced while the glass fiber is reinforced by the 'wick effect' of the glass fiber and the poor interface between the inorganic glass fiber and the organic matrix. At present, the CTI value of a white product of the general brominated flame-retardant reinforced polypropylene resin commonly used for electronic and electric products is generally not more than 250V, the CTI value of a black product is generally not more than 200V, and when the circuit of the electronic and electric products is accidentally discharged, the phenomena of material breakdown, thermal decomposition, electric corrosion, even ignition and the like can occur.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide the halogen-free flame-retardant reinforced polypropylene with high flame retardance and high leakage resistance and the preparation method thereof, so that the problems that the high flame retardance, the high electrical insulation property and the high strength of a polypropylene flame-retardant material are difficult to meet at the same time are solved, and the excellent flame retardance and the electrical property of the polypropylene flame-retardant reinforced polypropylene can replace ABS resin, PC/ABS alloy and the like to be used for producing electronic and electrical products such as sockets, angle connectors, binding posts, electrical panels, wiring boards and the like.
In order to achieve the purpose, the invention adopts the technical scheme that: the halogen-free flame-retardant reinforced polypropylene with high electric leakage resistance comprises the following components in percentage by weight:
54.5% -64.8% of polypropylene; 10% -15% of glass fiber; 25% -30% of flame retardant; 0.2 to 0.5 percent of synergistic agent.
Preferably, the glass fibers have a length of 3mm to 9 mm.
Preferably, the flame retardant is a nitrogen-phosphorus halogen-free flame retardant, and comprises one of triphenyl phosphate, melamine polyphosphate and encapsulated red phosphorus.
Preferably, the synergist is a hybrid with a rare earth element rubidium as a center and a silane coupling agent deposited on the surface.
Preferably, the method for preparing the hybrid comprises the following steps:
dissolving and dispersing 1.5g of rubidium oxide in xylene, adding 2.0g of silane coupling agent, controlling the temperature at 80 ℃, keeping the temperature for 12 hours, carrying out rotary evaporation on the xylene solvent, carrying out centrifugal separation and filtration for three times, and finally drying the cleaned compound for 12 hours at 110 ℃.
The invention also provides a preparation method of the halogen-free flame-retardant reinforced polypropylene with high electric leakage resistance, which comprises the following steps: mixing the polypropylene, the glass fiber, the flame retardant and the synergist according to the weight percentage, adding the mixture into a Haake torque rheometer, and blending for 3-5min at the temperature of 160-180 ℃ and the rpm of 50-80.
The beneficial effects of the invention are: 1. compared with the traditional mature halogen flame retardant system, most halogen-free flame retardants have the defects of large filling amount, large influence on the mechanical properties of the material (such as great reduction of notch impact strength) and the like. According to the invention, by fully utilizing the coupling structure of the silane coupling agent in the synergist, the compatibility of the flame-retardant system, the enhanced system and the matrix is improved, the contradiction between the flame-retardant efficiency and the mechanical property is balanced, and the physical and mechanical properties of the polypropylene reinforced resin are not damaged on the premise of reaching the flame-retardant performance index.
2. The synergist containing rare earth element rubidium (Rd) is adopted, the Rd has a full-empty 4f orbit, and a semi-empty and full-full electronic orbit structure can be formed by valence change and free radical capture, so that the synergist has strong catalytic char formation capability, and can catalyze the self char formation even in polypropylene polymers without char formation capability, so that the adhesion and deposition of fine carbon particles on glass fibers can be promoted, the candle wick effect of stripped fibers is weakened, and the flame retardant property of the material is more effectively improved; moreover, the strong catalytic char formation capability of Rd can reduce the generation and accumulation of free carbon caused by discharge to the maximum extent, solve the contradiction between flame-retardant char formation and char formation paths, balance the relationship between flame-retardant performance and electric leakage resistance, and comprehensively improve the electrical insulation of the material.
Detailed Description
The present invention will be described in further detail below with reference to specific examples, but the present invention is not limited to only the following examples. The invention is not limited to the embodiments described herein, but is capable of numerous modifications and variations within the spirit and scope of the invention as defined by the appended claims.
Example 1
Polypropylene, glass fiber, triphenyl phosphate and a hybrid (Rd-Si) are mixed according to the weight percentage of 54.5%, 15%, 30% and 0.5%, and then added into a haake torque rheometer to be blended for 3min at 160 ℃ and 50rpm, thus obtaining the example 1, and the performance indexes are shown in the following table:
TABLE 1 comparison of Performance parameters of example 1 with commercially available halogen-based reinforced flame retardant Polypropylene products
Example 2
Polypropylene, glass fiber, melamine polyphosphate and a hybrid (Rd-Si) are mixed according to the weight percentage of 64.8%, 10%, 25% and 0.2%, added into a Haake torque rheometer and blended for 5min at 180 ℃ and 80rpm, so that example 2 is obtained, and the performance indexes of the mixture are shown in the following table:
TABLE 2 comparison of Performance parameters of example 2 with commercially available halogen-based reinforced flame retardant Polypropylene products
Example 3
Polypropylene, glass fiber, encapsulated red phosphorus and a hybrid (Rd-Si) are mixed according to the weight percentage of 61.7%, 12%, 26% and 0.3%, added into a haake torque rheometer and blended for 3min at 170 ℃ and 60rpm, thus obtaining the example 3, and the performance indexes are shown in the following table:
table 3 comparison of performance parameters of example 3 with commercially available halogen-based reinforced flame retardant polypropylene products
Example 4
Polypropylene, glass fiber, melamine polyphosphate and a hybrid (Rd-Si) are mixed according to the weight percentage of 58.6 percent, 13 percent, 28 percent and 0.4 percent, added into a Haake torque rheometer and blended for 4min at 165 ℃ and 55rpm to obtain the example 4, and the performance indexes of the example are shown in the following table:
table 4 comparison of performance parameters of example 4 with commercially available halogen-based reinforced flame retardant polypropylene products
Example 5
Polypropylene, glass fiber, triphenyl ester and a hybrid (Rd-Si) are mixed according to the weight percentage of 59.5%, 14%, 26% and 0.5%, added into a haake torque rheometer and blended for 4min at 160 ℃, 70rpm, and example 5 is obtained, and the performance indexes are shown in the following table:
TABLE 5 comparison of Performance parameters of example 5 with commercially available halogen-based reinforced flame retardant Polypropylene products
The above embodiments only express specific embodiments of the present invention, and the description is specific and detailed, but not to be understood as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (4)
1. The halogen-free flame-retardant reinforced polypropylene with high electric leakage resistance is characterized by comprising the following components in percentage by weight:
54.5% -64.8% of polypropylene; 10% -15% of glass fiber; 25% -30% of flame retardant; 0.2 to 0.5 percent of synergist;
the synergist is a hybrid with a rare earth element rubidium as a center and a silane coupling agent deposited on the surface;
the preparation method of the hybrid comprises the following steps:
dissolving and dispersing 1.5g of rubidium oxide in xylene, adding 2.0g of silane coupling agent, controlling the temperature at 80 ℃, keeping the temperature for 12 hours, carrying out rotary evaporation on the xylene solvent, carrying out centrifugal separation and filtration for three times, and finally drying the cleaned compound for 12 hours at 110 ℃.
2. The electric leakage resistant halogen-free flame retardant reinforced polypropylene as claimed in claim 1, wherein the glass fiber has a length of 3mm to 9 mm.
3. The electric leakage resistant halogen-free flame retardant reinforced polypropylene as claimed in claim 1, wherein the flame retardant is nitrogen phosphorus halogen-free flame retardant comprising triphenyl phosphate, melamine polyphosphate, and encapsulated red phosphorus.
4. The preparation method of the halogen-free flame retardant reinforced polypropylene with high electric leakage resistance as claimed in any one of claims 1 to 3, characterized by comprising the following steps: mixing the polypropylene, the glass fiber, the flame retardant and the synergist according to the weight percentage, adding the mixture into a Haake torque rheometer, and blending for 3-5min at the temperature of 160-180 ℃ and the rpm of 50-80.
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| CN201911151532.4A CN110964247B (en) | 2019-11-21 | 2019-11-21 | Halogen-free flame-retardant reinforced polypropylene and preparation method thereof |
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|---|---|---|---|---|
| JPH11255953A (en) * | 1998-03-16 | 1999-09-21 | Toyo Ink Mfg Co Ltd | Flame retardant and flame retardant resin composition |
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| CN104004184A (en) * | 2014-05-22 | 2014-08-27 | 仲恺农业工程学院 | Halogen-free flame retardant MC (Monomer Casting) nylon composite material and preparation method thereof |
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-
2019
- 2019-11-21 CN CN201911151532.4A patent/CN110964247B/en active Active
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| CN102417661A (en) * | 2011-11-24 | 2012-04-18 | 上海日之升新技术发展有限公司 | Glass fiber-reinforced halogen-free flame-resistant polypropylene composite material and preparation method thereof |
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| CN107513222A (en) * | 2016-06-16 | 2017-12-26 | 汉达精密电子(昆山)有限公司 | Glass fiber reinforced halogen-free flame-retardant polypropylene resin composite and its products formed |
| CN105837948A (en) * | 2016-06-21 | 2016-08-10 | 惠安县威科电子科技有限公司 | Automotive interior decorative plate prepared by utilizing waste polypropylene material |
| CN106009045A (en) * | 2016-07-01 | 2016-10-12 | 中国科学院宁波材料技术与工程研究所 | Microencapsulated red phosphorus, and preparation method and application thereof |
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Non-Patent Citations (1)
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