CN103408838B - A kind of Halogen-free flame retardant reinforcement polypropylene composition - Google Patents
A kind of Halogen-free flame retardant reinforcement polypropylene composition Download PDFInfo
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
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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
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0066—Flame-proofing or flame-retarding additives
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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
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- C08K7/06—Elements
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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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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Abstract
The present invention relates to a kind of Halogen-free flame retardant reinforcement polypropylene composition, be made up of the raw material of following weight part: polypropylene 30-55, composite nitrogen phosphorus halogen-free flame retardants 20-26, magnesium salt whisker 20-35, calcium salt whisker 5-24, PP grafting compatilizer 2-6, oxidation inhibitor 0.2-1, auxiliary agent 0.2-2.0.The present invention also provides the preparation method of this composition.The invention has the advantages that: ingeniously utilize the synergistic fire retardation of magnesium salt whisker and the enhancement of calcium salt whisker, thus obtain the polypropylene material of high strength, high rigidity, smokeless, fire-retardant, dimensional stabilizing; Have employed easy expressing technique, by side feeding, whisker is added in acrylic resin, be prepared into a kind of have high rigidity, high strength, smokeless, fire-retardant, good stability of the dimension magnesium salt whisker strengthen halogen-free anti-flaming polypropylene material, the fields such as tubing, container, auto parts machinery, household electrical appliance can be widely used in.
Description
Technical field
The present invention relates to polyolefine technical field, specifically, be a kind of Halogen-free flame retardant reinforcement polypropylene composition and preparation method thereof, can be used for automobile-used product, family's electric material.
Background technology
Polypropylene PP is as one of five large general-purpose plastics, density is little, production cost is low, and comprehensive mechanical property is good, nontoxic, corrosion-resistant, be easy to processing and the advantage such as recovery, be widely used in various place, as fields such as household electrical appliance, inner and outer decorative parts of automobile, body-building apparatus, office appliance, daily necessities, toy and sanitary ware, occupy critical role in the plastic, but when making family's electric parts, its intensity, rigidity, thermotolerance and flame retardant resistance Chang Buneng reach requirement, limit polyacrylic application.At present relatively more conventional is glass, filling and fire retardant etc. carry out modification to polypropylene, to reach the object that polypropylene fire retardant strengthens.
At present, about polypropylene flame redardant development and application mainly by antiseptic-germicide physical blending in polypropylene PP resin.As: Chinese patent literature CN1079494A, disclose the low-smoke flame-retardant polypropylene alkene material that a kind of eight bromo ether, antimonous oxide and hydrated aluminum oxide obtain as composite flame-retardant agent, but this material mechanical performance can not meet the requirement of engineering plastics.US Patent No. 6,150, discloses one and utilizes tricresyl phosphate bromophenyl ester, antimonous oxide as composite flame-retardant agent in 442, obtained anti-flaming polypropylene material, but same mechanical property is poor, and can not meet the application in engineering plastics.The clear 56-149318 of Japanese Patent JP and the flat 4-36092 of Japanese Patent JP clear 61-256920, JP describes the preparation method of magnesium salt whisker simultaneously, and Chinese patent CN1288860A discloses a kind of preparation method of novel magnesium salt whisker.Chinese patent literature CN1536012A describes the application of a kind of magnesium salt whisker in Halogen flame-proof reinforced polypropylene.Its application in halogen-free polypropylene flame redardant is not yet related to.
Along with people are to the concern of environmental problem, the application of halogen-free anti-flaming polypropylene material is subject to increasing restriction, and polypropylene halogen-free flameproof becomes the important developing direction of polypropylene flame redardant one.
Summary of the invention
The object of the invention is, for deficiency of the prior art, to provide a kind of Halogen-free flame retardant reinforcement polypropylene composition.
Of the present invention again one object be that a kind of preparation method of Halogen-free flame retardant reinforcement polypropylene composition is provided.
For achieving the above object, the technical scheme that the present invention takes is: a kind of Halogen-free flame retardant reinforcement polypropylene composition, is made up of the raw material of following weight part: polypropylene 30-55, composite nitrogen phosphorus halogen-free flame retardants 20-26, magnesium salt whisker 20-35, calcium salt whisker 5-24, PP grafting compatilizer 2-6, oxidation inhibitor 0.2-1, auxiliary agent 0.2-2.0.
Described polypropylene is one or more in atactic polypropylene(APP), Isotactic polypropylene or syndiotactic polypropylenes, the quality melt flow rate (MFR) of polypropylene under temperature 230 DEG C, load 21.17N condition is 2.0 ~ 50.0g/10min, tensile strength >=20Mpa.
Phosphorus content >=22% in described composite nitrogen phosphorus halogen-free flame retardants, nitrogen content >=20%.
Described magnesium salt whisker and calcium salt whisker are of a size of: length-to-diameter ratio L/D >=50, particle diameter≤1 μm.
Described PP grafting compatilizer is the oligopolymer of the graft polymerization of polypropylene and unsaturated acid or acid anhydrides, and its melting index is 40-100g/10min.
Described oxidation inhibitor is Hinered phenols antioxidant.
Described auxiliary agent is thermo-stabilizer, lubricant, anti UV agent or pigment.
For realizing above-mentioned second object, the technical scheme that the present invention takes is: the preparation method of described Halogen-free flame retardant reinforcement polypropylene composition, comprises the following steps: weigh raw material by proportioning; Other components except magnesium salt whisker and calcium salt whisker are placed in high-speed mixer and mixing 5-10min, magnesium salt whisker and calcium salt whisker are mixed 5-10min in low speed mixer, discharging, by side spout, mixed whisker is added forcing machine, extrude at the dual-screw-stem machine of low sheraing screw combinations, cooling, granulation, finally dry particle, namely obtain Halogen-free flame retardant reinforcement polypropylene composition.
Described magnesium salt whisker and calcium salt whisker surface are first through coupling agent treatment, described coupling agent is silane coupling agent homologue or titanate coupling agent homologue, magnesium salt whisker and calcium salt whisker control rate of feeding after mixing 5-10min in low mixed machine, and in side, spout adds.
The rotating speed of described twin screw extruder is 200-500r/min, and forcing machine is set to from the temperature being fed to head: 175 DEG C, 180 DEG C, 185 DEG C, 190 DEG C, 190 DEG C, 190 DEG C, 190 DEG C, 185 DEG C, 180 DEG C.
The invention has the advantages that:
1, the present invention is ingenious utilizes the synergistic fire retardation of magnesium salt whisker and the enhancement of calcium salt whisker, thus obtain the polypropylene material of high strength, high rigidity, smokeless, fire-retardant, dimensional stabilizing, be suitable for all kinds of automobile-used, household electrical appliances engineering plastics part of injection molding;
2, present invention employs easy expressing technique, by side feeding, whisker is added in acrylic resin, be prepared into a kind of have high rigidity, high strength, smokeless, fire-retardant, good stability of the dimension magnesium salt whisker strengthen halogen-free anti-flaming polypropylene material, the fields such as tubing, container, auto parts machinery, household electrical appliance can be widely used in.
Embodiment
Below in conjunction with embodiment, embodiment provided by the invention is elaborated.
The invention provides a kind of Halogen-free flame retardant reinforcement polypropylene composition, be made up of the raw material of following weight part: polypropylene 30-55, composite nitrogen phosphorus halogen-free flame retardants 20-26, magnesium salt whisker 20-35, calcium salt whisker 5-24, PP grafting compatilizer 2-6, oxidation inhibitor 0.2-1, auxiliary agent 0.2-2.0.
It should be noted that, described polypropylene is one or more mixing in atactic polypropylene(APP), Isotactic polypropylene or syndiotactic polypropylenes, the quality melt flow rate (MFR) of polypropylene under temperature 230 DEG C, load 21.17N condition is 2.0 ~ 50.0g/10min, tensile strength >=20Mpa.
Phosphorus content >=22% in described composite nitrogen phosphorus halogen-free flame retardants, nitrogen content >=20%.
Described magnesium salt whisker and calcium salt whisker are of a size of: length-to-diameter ratio L/D >=50, particle diameter≤1 μm.
Described PP grafting compatilizer is the oligopolymer of the graft polymerization of polypropylene and unsaturated acid or acid anhydrides, and its melting index is 40-100g/10min.
Described oxidation inhibitor is Hinered phenols antioxidant, 1010 of preferred Ciba company.
Described auxiliary agent is thermo-stabilizer, lubricant, anti UV agent or pigment.
The preparation method of described Halogen-free flame retardant reinforcement polypropylene composition, comprises the following steps:
(1) raw material is taken by proportioning;
(2) by magnesium salt whisker and calcium salt whisker surface through coupling agent treatment, this coupling agent can be silane coupling agent homologue or titanate coupling agent homologue, preferred KH550, KH560.
(3) other components except magnesium salt whisker and calcium salt whisker are placed in high-speed mixer and mixing 5-10min;
(4) magnesium salt whisker and calcium salt whisker discharging after mixing 5-10min in low mixed machine, controls rate of feeding, feeds mouth mixed whisker is added forcing machine by side; Extrude at the dual-screw-stem machine of low sheraing screw combinations, cooling, granulation, finally particle is dried, namely obtain Halogen-free flame retardant reinforcement polypropylene composition.The rotating speed of twin screw extruder is 200 ~ 500r/min, and forcing machine is set to from the temperature being fed to head: 175 DEG C, 180 DEG C, 185 DEG C, 190 DEG C, 190 DEG C, 190 DEG C, 190 DEG C, 185 DEG C, 180 DEG C.
The concrete component of the Halogen-free flame retardant reinforcement polypropylene composition in following examples 1-2 and weight as shown in table 1.Wherein, take polypropylene as base-material, with the mixture of atactic polypropylene(APP), Isotactic polypropylene for base-material; Add composite nitrogen phosphorus fire retardant.Magnesium salt whisker is synergistic flame retardant; Calcium salt whisker is toughener, and PP-g-MAH is compatilizer.
Table 1: the weight proportion of embodiment 1-2 whisker reinforcement flame-proof polypropelene composition component
embodiment 1
(1) raw material is taken by weight ratio: polypropylene 48, composite nitrogen phosphorus halogen-free flame retardants 21, magnesium salt whisker 20, calcium salt whisker 8, PP grafting compatilizer 3, oxidation inhibitor 0.2, auxiliary agent 0.2;
(2) by magnesium salt whisker and calcium salt whisker surface through coupling agent KH550 process;
(3) polypropylene, nitrogen phosphorus fire retardant, compatilizer, oxidation inhibitor are placed in high-speed mixer and mixing 10 minutes together with other auxiliary agents;
(4) magnesium salt whisker and calcium salt whisker discharging after mixing 10min in low mixed machine, controls rate of feeding, feeds mouth mixed whisker is added forcing machine by side; The raw material of mixing is placed in twin screw extruder extruding pelletization, and the rotating speed of dual-screw-stem machine is 300 turns/min; Twin-screw extrusion complete processing is listed in table 2.
Table 2: twin-screw extrusion complete processing
embodiment 2
(1) raw material is taken by weight ratio: polypropylene 33, composite nitrogen phosphorus halogen-free flame retardants 21, magnesium salt whisker 35, calcium salt whisker 8, PP grafting compatilizer 3, oxidation inhibitor 0.2, auxiliary agent 0.2;
(2) by magnesium salt whisker and calcium salt whisker surface through coupling agent KH550 process;
(3) polypropylene, nitrogen phosphorus fire retardant, compatilizer, oxidation inhibitor are placed in high-speed mixer and mixing 10 minutes together with other auxiliary agents;
(4) magnesium salt whisker and calcium salt whisker discharging after mixing 10min in low mixed machine, controls rate of feeding, feeds mouth mixed whisker is added forcing machine by side; The raw material of mixing is placed in twin screw extruder extruding pelletization, and the rotating speed of dual-screw-stem machine is 300 turns/min; Twin-screw extrusion complete processing is listed in table 2.
The Halogen-free flame retardant reinforcement polypropylene composition obtained to embodiment 1-2 carries out Mechanics Performance Testing contrast, and result such as table 3 shows.
Table 3: embodiment 1-2 whisker reinforcement flame-proof polypropelene composition performance comparison
In following examples 3-4, contrast different calcium salt whisker amount, the concrete component of the Halogen-free flame retardant reinforcement polypropylene composition that other component changes and weight as shown in table 4.Wherein, take polypropylene as base-material, with the mixture of atactic polypropylene(APP), Isotactic polypropylene for base-material; Add composite nitrogen phosphorus fire retardant.Magnesium salt whisker is synergistic flame retardant; Calcium salt whisker is toughener, and PP-g-MAH is compatilizer.
Table 4: the weight proportion of whisker reinforcement flame-proof polypropelene composition component
embodiment 3
(1) raw material is taken by weight ratio: polypropylene 48, composite nitrogen phosphorus halogen-free flame retardants 21, magnesium salt whisker 20, calcium salt whisker 8, PP grafting compatilizer 3, oxidation inhibitor 0.2, auxiliary agent 0.2;
(2) by magnesium salt whisker and calcium salt whisker surface through coupling agent KH550 process;
(3) polypropylene, nitrogen phosphorus fire retardant, compatilizer, oxidation inhibitor are placed in high-speed mixer and mixing 10 minutes together with other auxiliary agents;
(4) magnesium salt whisker and calcium salt whisker discharging after mixing 10min in low mixed machine, controls rate of feeding, feeds mouth mixed whisker is added forcing machine by side; The raw material of mixing is placed in twin screw extruder extruding pelletization, and the rotating speed of dual-screw-stem machine is 300 turns/min; Twin-screw extrusion complete processing is listed in table 2.
embodiment 4
(1) raw material is taken by weight ratio: polypropylene 33, composite nitrogen phosphorus halogen-free flame retardants 21, magnesium salt whisker 20, calcium salt whisker 23, PP grafting compatilizer 3, oxidation inhibitor 0.2, auxiliary agent 0.2;
(2) by magnesium salt whisker and calcium salt whisker surface through coupling agent KH550 process;
(3) polypropylene, nitrogen phosphorus fire retardant, compatilizer, oxidation inhibitor are placed in high-speed mixer and mixing 10 minutes together with other auxiliary agents;
(4) magnesium salt whisker and calcium salt whisker discharging after mixing 10min in low mixed machine, controls rate of feeding, feeds mouth mixed whisker is added forcing machine by side; The raw material of mixing is placed in twin screw extruder extruding pelletization, and the rotating speed of dual-screw-stem machine is 300 turns/min; Twin-screw extrusion complete processing is listed in table 2.
The Halogen-free flame retardant reinforcement polypropylene composition obtained to embodiment 3-4 carries out Mechanics Performance Testing contrast, and result such as table 5 shows.
Table 5: whisker reinforcement flame-proof polypropelene composition performance comparison
Compared with prior art, have the fire-retardant effect arranged, comprehensive mechanical property is higher for the flame-retardant polypropylene composite material developed according to above-mentioned formula and technique.This material can be widely used in the field such as auto parts machinery, household electrical appliance.
embodiment 5
(1) raw material is taken by weight ratio: polypropylene 30, composite nitrogen phosphorus halogen-free flame retardants 26, magnesium salt whisker 33, calcium salt whisker 5, PP grafting compatilizer 6, oxidation inhibitor 1, auxiliary agent 2;
(2) by magnesium salt whisker and calcium salt whisker surface through coupling agent KH560 process;
(3) polypropylene, nitrogen phosphorus fire retardant, compatilizer, oxidation inhibitor are placed in high-speed mixer and mixing 5 minutes together with other auxiliary agents;
(4) magnesium salt whisker and calcium salt whisker discharging after mixing 5min in low mixed machine, controls rate of feeding, feeds mouth mixed whisker is added forcing machine by side; The raw material of mixing is placed in twin screw extruder extruding pelletization, and the rotating speed of dual-screw-stem machine is 200 turns/min; Twin-screw extrusion complete processing is listed in table 2.
embodiment 6
(1) raw material is taken by weight ratio: polypropylene 53, composite nitrogen phosphorus halogen-free flame retardants 20, magnesium salt whisker 20, calcium salt whisker 5, PP grafting compatilizer 2, oxidation inhibitor 0.5, auxiliary agent 1;
(2) by magnesium salt whisker and calcium salt whisker surface through coupling agent KH550 process;
(3) polypropylene, nitrogen phosphorus fire retardant, compatilizer, oxidation inhibitor are placed in high-speed mixer and mixing 10 minutes together with other auxiliary agents;
(4) magnesium salt whisker and calcium salt whisker discharging after mixing 6min in low mixed machine, controls rate of feeding, feeds mouth mixed whisker is added forcing machine by side; The raw material of mixing is placed in twin screw extruder extruding pelletization, and the rotating speed of dual-screw-stem machine is 300 turns/min; Twin-screw extrusion complete processing is listed in table 2.
embodiment 7
(1) raw material is taken by weight ratio: polypropylene 55, composite nitrogen phosphorus halogen-free flame retardants 20, magnesium salt whisker 20, calcium salt whisker 5, PP grafting compatilizer 2, oxidation inhibitor 0.2, auxiliary agent 0.2;
(2) by magnesium salt whisker and calcium salt whisker surface through coupling agent KH550 process;
(3) polypropylene, nitrogen phosphorus fire retardant, compatilizer, oxidation inhibitor are placed in high-speed mixer and mixing 6 minutes together with other auxiliary agents;
(4) magnesium salt whisker and calcium salt whisker discharging after mixing 10min in low mixed machine, controls rate of feeding, feeds mouth mixed whisker is added forcing machine by side; The raw material of mixing is placed in twin screw extruder extruding pelletization, and the rotating speed of dual-screw-stem machine is 400 turns/min; Twin-screw extrusion complete processing is listed in table 2.
embodiment 8
(1) raw material is taken by weight ratio: polypropylene 30, composite nitrogen phosphorus halogen-free flame retardants 20, magnesium salt whisker 20, calcium salt whisker 24, PP grafting compatilizer 6, oxidation inhibitor 0.2, auxiliary agent 0.2;
(2) by magnesium salt whisker and calcium salt whisker surface through coupling agent KH550 process;
(3) polypropylene, nitrogen phosphorus fire retardant, compatilizer, oxidation inhibitor are placed in high-speed mixer and mixing 8 minutes together with other auxiliary agents;
(4) magnesium salt whisker and calcium salt whisker discharging after mixing 7min in low mixed machine, controls rate of feeding, feeds mouth mixed whisker is added forcing machine by side; The raw material of mixing is placed in twin screw extruder extruding pelletization, and the rotating speed of dual-screw-stem machine is 500 turns/min; Twin-screw extrusion complete processing is listed in table 2.
Compared with prior art, the present invention has the following advantages:
Magnesium salt whisker molecular formula is: MgSO
45Mg (OH)
23H
2o, in molecule, contained chemical association water ratio is up to 31%, and decomposition temperature reaches 306.8 DEG C, therefore can keep stable under polypropylene processing temperature, and discharge a large amount of water vapour when Plastics Combustion, a large amount of heat of releasing when can absorb burning, reduce the temperature of combustiblematerials.Simultaneously the adding of calcium salt whisker, improve the intensity of material, adding of magnesium salt whisker, playing the effect pressing down cigarette when burning, having important realistic meaning in the today of day by day improving environmental requirement.Its reaction equation is as follows:
Calcium salt whisker is white powder, and it is of a size of: length-to-diameter ratio L/D >=50, particle diameter≤1 μm.Therefore can add in polypropylene composite as strongthener, have obvious enhancement, simultaneously surface luster, good stability of the dimension, tinting strength is strong, extends polyacrylic range of application.
The invention has the advantages that the enhancement of the ingenious synergistic fire retardation utilizing magnesium salt whisker too calcium salt whisker, thus obtain the polypropylene material of high strength, high rigidity, halogen-free flameproof, dimensional stabilizing, be suitable for all kinds of automobile-used, household electrical appliances engineering plastics part of injection molding.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the inventive method; can also make some improvement and supplement, these improve and supplement and also should be considered as protection scope of the present invention.
Claims (4)
1. a Halogen-free flame retardant reinforcement polypropylene composition, it is characterized in that, be made up of the raw material of following weight part: polypropylene 30-55, composite nitrogen phosphorus halogen-free flame retardants 20-26, magnesium salt whisker 20-35, calcium salt whisker 5-24, PP grafting compatilizer 2-6, oxidation inhibitor 0.2-1, auxiliary agent 0.2-2.0; Described polypropylene is one or more in atactic polypropylene(APP), Isotactic polypropylene or syndiotactic polypropylenes, the quality melt flow rate (MFR) of polypropylene under temperature 230 DEG C, load 21.17N condition is 2.0 ~ 50.0g/10min, tensile strength >=20MPa; Phosphorus content >=22% in described composite nitrogen phosphorus halogen-free flame retardants, nitrogen content >=20%; Described magnesium salt whisker and calcium salt whisker are of a size of: length-to-diameter ratio L/D >=50, particle diameter≤1 μm; Described PP grafting compatilizer is the oligopolymer of the graft polymerization of polypropylene and unsaturated acid or acid anhydrides, and its melting index is 40-100g/10min; Described oxidation inhibitor is Hinered phenols antioxidant; Described auxiliary agent is thermo-stabilizer, lubricant, anti UV agent or pigment.
2. the preparation method of Halogen-free flame retardant reinforcement polypropylene composition according to claim 1, is characterized in that, comprises the following steps: take raw material by proportioning; Other components except magnesium salt whisker and calcium salt whisker are placed in high-speed mixer and mixing 5-10min, magnesium salt whisker and calcium salt whisker are mixed 5-10min in low speed mixer, discharging, by side spout, mixed whisker is added forcing machine, extrude at the dual-screw-stem machine of low sheraing screw combinations, cooling, granulation, finally dry particle, namely obtain Halogen-free flame retardant reinforcement polypropylene composition.
3. preparation method according to claim 2, it is characterized in that, described magnesium salt whisker and calcium salt whisker surface are first through coupling agent treatment, described coupling agent is silane coupling agent homologue or titanate coupling agent homologue, magnesium salt whisker and calcium salt whisker control rate of feeding after mixing 5-10min in low mixed machine, and in side, spout adds.
4. preparation method according to claim 2, it is characterized in that, the rotating speed of described twin screw extruder is 200-500r/min, and forcing machine is set to from the temperature being fed to head: 175 DEG C, 180 DEG C, 185 DEG C, 190 DEG C, 190 DEG C, 190 DEG C, 190 DEG C, 185 DEG C, 180 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1536012A (en) * | 2003-04-07 | 2004-10-13 | 上海日之升新技术发展有限公司 | Magnesium solt whisker rein forced fire-resisting polypropylene composition |
| CN101418099A (en) * | 2008-12-02 | 2009-04-29 | 上海金发科技发展有限公司 | Natural fiber reinforcement halogen-free flame retardant polypropylene composite material and preparation method thereof |
| CN102372869A (en) * | 2011-10-28 | 2012-03-14 | 泰安现代塑料有限公司 | Halogen-free flame retardant plastic geotechnical grille master batch for mine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1536012A (en) * | 2003-04-07 | 2004-10-13 | 上海日之升新技术发展有限公司 | Magnesium solt whisker rein forced fire-resisting polypropylene composition |
| CN101418099A (en) * | 2008-12-02 | 2009-04-29 | 上海金发科技发展有限公司 | Natural fiber reinforcement halogen-free flame retardant polypropylene composite material and preparation method thereof |
| CN102372869A (en) * | 2011-10-28 | 2012-03-14 | 泰安现代塑料有限公司 | Halogen-free flame retardant plastic geotechnical grille master batch for mine |
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| 硫酸钙晶须复合增强聚丙烯性能研究;葛铁军,等;《塑料科技》;19970228(第1期);第16-19页 * |
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