CN110628132A - Flame-retardant master batch for polypropylene, and preparation method and application thereof - Google Patents
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- 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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- 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
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
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- C08K3/36—Silica
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- 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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- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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Abstract
The invention discloses a flame-retardant master batch for polypropylene, which comprises the following components in parts by weight: 10-30 parts of carrier, 60-80 parts of flame retardant, 10-20 parts of flame retardant synergist, 0.5-2 parts of silane coupling agent, 0.1-0.2 part of antioxidant and 1-2 parts of toughening agent. The invention has the beneficial effects that: the flame-retardant master batch has good char forming property and high flame-retardant efficiency, can inhibit the candle wick effect when a glass fiber reinforced polypropylene material is burnt, can form a compact carbon layer with a shell-core structure when the material is burnt, avoids the phenomenon of molten drop, can effectively reduce the heat release rate when the material is burnt, and thus improves the flame-retardant efficiency of the material.
Description
Technical Field
The invention relates to the field of flame retardant application, and particularly relates to a flame-retardant master batch for polypropylene, and a preparation method and application thereof.
Background
With technological advances, light materials are required in many aspects, and metal materials are not suitable for forming complex shapes, are heavy and expensive, and limit the application of the metal materials in many parts. The polypropylene material is light in weight, low in price and capable of being injection molded at will, and gradually replaces metal materials, ABS resin and the like after being reinforced and modified by the glass fiber, so that the polypropylene material is mainly used for structural parts of products.
The polypropylene material belongs to a flammable material, and the oxygen index is about 17 percent. The addition of the glass fiber can improve the thermal stability of the polypropylene, so that the oxygen index of the reinforced material can reach 21.0 percent, but once the glass fiber reinforced material is combusted, the glass fiber reinforced material has the advantages of high heat transfer, high combustion speed and large flame due to the candlewick effect of the glass fiber, and is more difficult to retard flame compared with non-glass fiber reinforced polypropylene.
The halogen flame retardant is easy to generate toxic and corrosive gas during combustion, and has large smoke generation amount, so at present, most of the flame retardants used for glass fiber reinforced polypropylene materials are inorganic metal hydroxides and intumescent flame retardants. The addition amount of the metal hydroxide is large, and the flame-retardant efficiency is low, so that the single application is less; the addition amount of the intumescent flame retardant is relatively small, and the intumescent flame retardant is more and more applied, but most intumescent flame retardants are still insufficient in char formation when used in glass fiber reinforced polypropylene, and are easy to generate a dripping phenomenon.
Disclosure of Invention
The invention provides a flame-retardant master batch for polypropylene, a preparation method and application thereof, aiming at the problem of poor flame-retardant effect of the conventional flame retardant for a glass fiber reinforced polypropylene material.
The technical scheme for solving the technical problems is as follows: the flame-retardant master batch for polypropylene comprises the following components in parts by weight: 10-30 parts of carrier, 60-80 parts of flame retardant, 10-20 parts of flame retardant synergist, 0.5-2 parts of silane coupling agent, 0.1-0.2 part of antioxidant and 1-2 parts of toughening agent.
The carrier is one or more of polypropylene copolymer, polypropylene homopolymer, low density polyethylene or ultra-low density polyethylene.
The flame retardant consists of the following substances in parts by weight: 30-50% of melamine-coated ammonium polyphosphate, 10-30% of melamine cyanurate, 10-20% of dipentaerythritol, 5-15% of magnesium hydroxide and 8-10% of silicon dioxide.
The flame-retardant synergist is one or more of montmorillonite, organic montmorillonite, talcum powder, hydrotalcite and needle-like wollastonite. The preparation method of the flame-retardant master batch for polypropylene comprises the following steps: weighing the components in parts by weight in sequence, adding the carrier into a high-speed stirrer, starting the high-speed stirrer at the rotating speed of 200r/min and the temperature of 180 ℃, adding the silane coupling agent, the antioxidant and the toughening agent, and continuing stirring for 3-8 min; adding the rest components, keeping the temperature, continuously stirring for 10min, transferring into a hopper of a double-screw extruder, and granulating after extrusion.
The flame-retardant master batch for polypropylene can be used for preparing fiber reinforced flame-retardant polypropylene, wherein the components in parts by weight are as follows: 10-30 parts of flame-retardant master batch for polypropylene, 40-70 parts of polypropylene base material and 20-40 parts of long glass fiber.
The length of the long glass fiber is 10-15 mm.
The invention has the beneficial effects that: the flame-retardant master batch has good char forming property and high flame-retardant efficiency, can inhibit the candle wick effect when a glass fiber reinforced polypropylene material is burnt, can form a compact carbon layer with a shell-core structure when the material is burnt, avoids the phenomenon of molten drop, can effectively reduce the heat release rate when the material is burnt, and thus improves the flame-retardant efficiency of the material.
Detailed Description
The present invention is described below with reference to examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example 1
The flame-retardant master batch for polypropylene comprises the following components in parts by weight: 10 parts of polypropylene copolymer, 80 parts of flame retardant, 20 parts of montmorillonite, KH 5502 parts of silane coupling agent, 1680.1 parts of antioxidant and 2 parts of toughening agent ethylene-propylene copolymer.
The flame retardant consists of the following substances in parts by weight: 30% of melamine-coated ammonium polyphosphate, 30% of melamine cyanurate, 20% of dipentaerythritol, 12% of magnesium hydroxide and 8% of silicon dioxide.
The preparation method of the flame-retardant master batch for polypropylene comprises the following steps: weighing the components in parts by weight in sequence, adding the carrier into a high-speed stirrer, starting the high-speed stirrer at the rotating speed of 200r/min and the temperature of 180 ℃, adding the silane coupling agent, the antioxidant and the toughening agent, and continuing stirring for 3-8 min; adding the rest components, keeping the temperature, continuously stirring for 10min, transferring into a hopper of a double-screw extruder, and granulating after extrusion.
The fiber reinforced flame-retardant polypropylene prepared by the embodiment comprises the following components: 10 parts of flame-retardant master batch for polypropylene, 40 parts of polypropylene base material and 40 parts of long glass fiber with the length of 10 mm; the preparation method comprises the following steps: the components are uniformly mixed and then extruded by a double-screw extruder, and then cooled and formed.
Example 2
The flame-retardant master batch for polypropylene comprises the following components in parts by weight: 20 parts of homopolymerized polypropylene, 70 parts of flame retardant, 15 parts of talcum powder, KH 5601.2 parts of silane coupling agent, 10100.15 parts of antioxidant and 1.5 parts of toughening agent ethylene-octene copolymer.
The flame retardant consists of the following substances in parts by weight: 50% of melamine-coated ammonium polyphosphate, 10% of melamine cyanurate, 20% of dipentaerythritol, 10% of magnesium hydroxide and 10% of silicon dioxide.
The preparation method of the flame-retardant master batch for polypropylene comprises the following steps: weighing the components in parts by weight in sequence, adding the carrier into a high-speed stirrer, starting the high-speed stirrer at the rotating speed of 200r/min and the temperature of 180 ℃, adding the silane coupling agent, the antioxidant and the toughening agent, and continuing stirring for 3-8 min; adding the rest components, keeping the temperature, continuously stirring for 10min, transferring into a hopper of a double-screw extruder, and granulating after extrusion.
The fiber reinforced flame-retardant polypropylene prepared by the embodiment comprises the following components: 20 parts of flame-retardant master batch for polypropylene, 55 parts of polypropylene base material and 30 parts of long glass fiber with the length of 11 mm; the preparation method comprises the following steps: the components are uniformly mixed and then extruded by a double-screw extruder, and then cooled and formed.
Example 3
The flame-retardant master batch for polypropylene comprises the following components in parts by weight: 30 parts of low-density polyethylene, 60 parts of flame retardant, 10 parts of hydrotalcite, KH 5500.5 parts of silane coupling agent, 1680.2 parts of antioxidant and 1 part of toughening agent ethylene-butylene copolymer.
The flame retardant consists of the following substances in parts by weight: 40% of melamine-coated ammonium polyphosphate, 20% of melamine cyanurate, 15% of dipentaerythritol, 15% of magnesium hydroxide and 10% of silicon dioxide.
The preparation method of the flame-retardant master batch for polypropylene comprises the following steps: weighing the components in parts by weight in sequence, adding the carrier into a high-speed stirrer, starting the high-speed stirrer at the rotating speed of 200r/min and the temperature of 180 ℃, adding the silane coupling agent, the antioxidant and the toughening agent, and continuing stirring for 3-8 min; adding the rest components, keeping the temperature, continuously stirring for 10min, transferring into a hopper of a double-screw extruder, and granulating after extrusion.
The fiber reinforced flame-retardant polypropylene prepared by the embodiment comprises the following components: 30 parts of flame-retardant master batch for polypropylene, 70 parts of polypropylene base material and 20 parts of long glass fiber with the length of 13 mm; the preparation method comprises the following steps: the components are uniformly mixed and then extruded by a double-screw extruder, and then cooled and formed.
Example 4
The flame-retardant master batch for polypropylene comprises the following components in parts by weight: 5 parts of copolymerized polypropylene, 10 parts of homopolymerized polypropylene, 80 parts of flame retardant, 17 parts of needle-shaped wollastonite, 5601 parts of silane coupling agent KH, 10100.1 parts of antioxidant and 1.5 parts of toughening agent ethylene-octene copolymer.
The flame retardant consists of the following substances in parts by weight: 47% of melamine-coated ammonium polyphosphate, 30% of melamine cyanurate, 10% of dipentaerythritol, 5% of magnesium hydroxide and 8% of silicon dioxide.
The preparation method of the flame-retardant master batch for polypropylene comprises the following steps: weighing the components in parts by weight in sequence, adding the carrier into a high-speed stirrer, starting the high-speed stirrer at the rotating speed of 200r/min and the temperature of 180 ℃, adding the silane coupling agent, the antioxidant and the toughening agent, and continuing stirring for 3-8 min; adding the rest components, keeping the temperature, continuously stirring for 10min, transferring into a hopper of a double-screw extruder, and granulating after extrusion.
The fiber reinforced flame-retardant polypropylene prepared by the embodiment comprises the following components: 20 parts of flame-retardant master batch for polypropylene, 60 parts of polypropylene base material and 25 parts of long glass fiber with the length of 15 mm; the preparation method comprises the following steps: the components are uniformly mixed and then extruded by a double-screw extruder, and then cooled and formed.
Comparative example
The fiber reinforced polypropylene comprises 70 parts by weight of polypropylene base material and 30 parts by weight of long glass fiber with the length of 11mm, and is prepared by adopting a double-screw extruder to extrude, cool and mold.
The glass fiber reinforced flame retardant polypropylenes of examples 1 to 4 and the glass fiber reinforced polypropylene of the comparative example were subjected to the relevant tests, and the results are shown in Table 1.
TABLE 1 test results of polypropylene materials of examples 1-4 and comparative example
Remarking:
1. "√" indicates a pass test; "X" indicates failure of the test.
2. Test method
Char formation and thermal analysis of the material: a cone calorimeter;
vertical burning test: ANSI/UL-94-1985;
glow wire flammability test of materials: GB/T5169.12-2013;
glow wire ignition test of the materials: GB/T5169.13-2013.
As shown by the comparative analysis of the test data in Table 1, the flame-retardant master batch of the invention can enable the material to reach UL 94V-0 (1.0mm) after being used in a glass fiber reinforced polypropylene material, and can pass glow wire tests of GWIT 750 ℃ (1.5mm) and GWFI 850 ℃ (1.5 mm). The carbon layer after the material is burnt is compact, has a shell-core structure, and obviously reduces the heat release rate.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The flame-retardant master batch for polypropylene is characterized by comprising the following components in parts by weight: 10-30 parts of carrier, 60-80 parts of flame retardant, 10-20 parts of flame retardant synergist, 0.5-2 parts of silane coupling agent, 0.1-0.2 part of antioxidant and 1-2 parts of toughening agent.
2. The flame-retardant masterbatch for polypropylene according to claim 1, wherein the carrier is one or more of co-polypropylene, homo-polypropylene, low density polyethylene or ultra-low density polyethylene.
3. The flame-retardant master batch for polypropylene according to claim 1, wherein the flame retardant comprises the following components in parts by weight: 30-50% of melamine-coated ammonium polyphosphate, 10-30% of melamine cyanurate, 10-20% of dipentaerythritol, 5-15% of magnesium hydroxide and 8-10% of silicon dioxide.
4. The flame-retardant master batch for polypropylene according to claim 1, wherein the flame-retardant synergist is one or more of montmorillonite, organic montmorillonite, talcum powder, hydrotalcite and needle-like wollastonite.
5. The method for preparing the flame-retardant master batch for polypropylene according to any one of claims 1 to 4, comprising the following steps: weighing the components in parts by weight in sequence, adding the carrier into a high-speed stirrer, starting the high-speed stirrer at the rotating speed of 200r/min and the temperature of 180 ℃, adding the silane coupling agent, the antioxidant and the toughening agent, and continuing stirring for 3-8 min; adding the rest components, keeping the temperature, continuously stirring for 10min, transferring into a hopper of a double-screw extruder, and granulating after extrusion.
6. A fiber reinforced flame-retardant polypropylene is characterized by comprising the flame-retardant master batch for polypropylene, a polypropylene base material and long glass fiber according to any one of claims 1 to 4, wherein the components in parts by weight are as follows: 10-30 parts of flame-retardant master batch for polypropylene, 40-70 parts of polypropylene base material and 20-40 parts of long glass fiber.
7. The fiber-reinforced flame retardant polypropylene according to claim 1, wherein the long glass fiber has a length of 10 to 15 mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114031844A (en) * | 2021-10-25 | 2022-02-11 | 浙江旭森非卤消烟阻燃剂有限公司 | Halogen-free flame-retardant master batch for continuous long glass fiber reinforced polypropylene and preparation method thereof |
| CN114736461A (en) * | 2022-05-05 | 2022-07-12 | 清远市一丞阻燃材料有限公司 | High-capacity flame-retardant master batch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114031844A (en) * | 2021-10-25 | 2022-02-11 | 浙江旭森非卤消烟阻燃剂有限公司 | Halogen-free flame-retardant master batch for continuous long glass fiber reinforced polypropylene and preparation method thereof |
| CN114031844B (en) * | 2021-10-25 | 2023-10-03 | 浙江旭森阻燃剂股份有限公司 | Halogen-free flame-retardant master batch for continuous long glass fiber reinforced polypropylene and preparation method thereof |
| CN114736461A (en) * | 2022-05-05 | 2022-07-12 | 清远市一丞阻燃材料有限公司 | High-capacity flame-retardant master batch |
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