CN102408631A - High-strength flaming retarding polypropylene modified material and preparation method thereof - Google Patents
High-strength flaming retarding polypropylene modified material and preparation method thereof Download PDFInfo
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- CN102408631A CN102408631A CN2011103518080A CN201110351808A CN102408631A CN 102408631 A CN102408631 A CN 102408631A CN 2011103518080 A CN2011103518080 A CN 2011103518080A CN 201110351808 A CN201110351808 A CN 201110351808A CN 102408631 A CN102408631 A CN 102408631A
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Abstract
The invention discloses a high-strength flaming retarding polypropylene modified material and a preparation method thereof. The preparation method comprises the following steps of: (1) drying particles of a pure polypropylene material for two hours at a set temperature; (2) uniformly mixing a set addition amount of calcium sulfate crystal whiskers with the particles of the pure polypropylene material; (3) adding a dispersing agent in the mixture of the calcium sulfate crystal whiskers and the particles of the pure polypropylene material according to a set mass percentage and stirring and mixing uniformly; (4) setting the temperature and screw rotating speed of a twin-screw extruder and adding the mixture finally formed in the step (3) in the twin-screw extruder for mixing and continuous extruding; (5) after a material discharge port starts to discharge materials, adding zinc oxide crystal whiskers into the twin-screw extruder from the side material port of the twin-screw extruder and mixing and extruding; and (6) cutting particles, and drying the particles for two hours at a set temperature so as to finally obtain high-strength flaming retarding polypropylene particles. The invention also discloses a high-strength flaming retarding polypropylene modified material.
Description
Technical field
The invention belongs to technical field of polymer materials, be specifically related to a kind of preparation method and this high-strength fire-retarding polypropylene modified material of high-strength fire-retarding polypropylene modified material.
Background technology
Vestolen PP 7052 (Polypropylene; Abbreviation PP) plastics have that density is little, specific tenacity (ratio of intensity and its specific density) is high, anticorrosive, rub resistance, good insulating, be prone to that processing, energy consumption are low to reach many having a few such as noise is little, are very ideal Material Useds of industry such as automotive industry.The continuous enhancing of Along with people's environmental consciousness, the raising of people's level of consumption and people are to the raising of consumer's goods quality requirements, and people are to the raising gradually of PP performance demands.Especially more harsh to performance demands such as PP strength property, bending property, shock resistance, flame retardant propertiess.In recent years; Researcher has been done the research work of broad aspect to promoting the PP performance; Through in PP, add rubber or elastomer material,, spun glass, Masterbatch, graft acrylic acid etc., expectation promotes the performance of PP through adding these a little fillers, but effect and not obvious.
Chinese patent CN1401697 discloses a kind of acrylic acid grafted polypropylene modified aluminium hydroxide/polypropylene flameretardant material; With polypropylene matrix, aluminium hydroxide fire retardant, acrylic acid grafted polypropylene modified dose, stablizer and proportionally melt extrude after the mixed at high speed, promptly obtain acrylic acid grafted polypropylene modified aluminium hydroxide/polypropylene flameretardant material; Chinese patent CN101693776A discloses a kind of novel high-intensity high heat-resistance polypropylene modified composite material; Adopt components such as Vestolen PP 7052, calcium sulfate crystal whiskers, spun glass, polypropylene grafted maleic anhydride, nucleator, oxidation inhibitor, lubricant to mix and extrude, obtain glass and calcium sulfate crystal whiskers mixes reinforced polypropylene compound material.
Through our discovering; In PP, add the correlated performance that an amount of calcium sulfate crystal whiskers and ZnOw can increase substantially the PP PP composite material; The composite modified polyacrylic method of calcium sulfate crystal whiskers and ZnOw not only can be by a relatively large margin the polyacrylic mechanical property of raising and also utilize the flame retardant effect of ZnOw; Solve the inflammable problem of Vestolen PP 7052, played fire-retardant purpose to a certain extent.PP is carried out the high performance study on the modification, strengthens its mechanical property and flame retardant properties, raising by a relatively large margin the range of application of PP, have important practical significance.
Because PP is an organism, be difficult to effectively compatible problem with the inorganic crystal whisker existence.Mostly existing research method is earlier inorganic crystal whisker to be carried out surface-treated, utilizes properties-correcting agent to form organic group on the inorganic crystal whisker surface, thereby strengthens the consistency of PP and inorganic crystal whisker.But in actual experiment and production process, properties-correcting agent will certainly produce secondary pollution to the surface-treated of inorganic crystal whisker, and increases operation, is unfavorable for production practice.And we add relevant dispersion agent in the mixing process of PP and inorganic crystal whisker, make inorganic crystal whisker be dispersed in the PP surface uniformly, and have avoided the generation of complex proceduresization and secondary pollution, have important production practical significance.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of high-strength fire-retarding polypropylene modified material; A kind of high-strength fire-retarding polypropylene modified material obtained by this method also is provided; The inventive method is comparatively obvious to polyacrylic reinforced effects, and calcium sulfate crystal whiskers and ZnOw is composite according to certain ratio, has improved polyacrylic mechanical property and has strengthened its flame retardant properties; ZnOw is added from the side spout; It is fairly obvious not only to have reduced mixing energy consumption and reinforced effects, has shortened process cycle and has avoided secondary pollution, practices thrift cost and protection environment.
The present invention for realizing the technical scheme that above-mentioned purpose adopted is:
A kind of preparation method of high-strength fire-retarding polypropylene modified material, it may further comprise the steps:
(1) with the pure material particle of Vestolen PP 7052 under design temperature dry two hours;
(2) calcium sulfate crystal whiskers is even by addition and the pure material mix particles of Vestolen PP 7052 set;
(3) in the mixture of this calcium sulfate crystal whiskers and the pure material particle of Vestolen PP 7052, add to set the dispersion agent of mass percent and stir it is mixed;
(4) set the temperature and the screw speed of twin screw extruder, the last mixture that forms in this step (3) is joined mix in the twin screw extruder and extrude continuously;
(5) treat that discharge port begins discharging after, the ZnOw of setting mass percent mouthful is joined in the twin screw extruder by the side position material of this twin screw extruder and mixes, extrudes;
(6) material that mixes after extruding in the step (5) is cut granulation, and particle drying under the temperature of setting can be obtained the high-strength fire-retarding polypropylene particles in two hours.
In the said step (2), the mass percent of this calcium sulfate crystal whiskers is 1%～20%.
In the said step (2), the mass percent of the pure material particle of Vestolen PP 7052 is 72%～97%.
In the said step (3), this dispersion agent is a Triple Pressed Stearic Acid, and its mass percent is 1%～3%.
In the said step (5), the mass percent of this ZnOw is 1%～5%.
In said step (1) and (6), drying temperature is 60 ℃～120 ℃.
In the said step (4), the extrusion temperature of this twin screw extruder is 175 ℃～190 ℃, and the adjusting screw(rod) rotating speed is 120r/min～180r/min.
The prepared high-strength fire-retarding polypropylene modified material of a kind of preparation method by aforesaid high-strength fire-retarding polypropylene modified material, its raw material composition and mass percent are following:
Said dispersion agent is a Triple Pressed Stearic Acid.
Compared with prior art, the catalyzer of the present invention's preparation has following advantage:
(1) the present invention is utilizing under the simple processing condition, and is comparatively obvious to polyacrylic reinforced effects, has application promise in clinical practice.
(2) novelty of the present invention is composite according to certain ratio with calcium sulfate crystal whiskers and ZnOw, has also strengthened its flame retardant properties thereby not only improved polyacrylic mechanical property.
(3) novelty of the present invention ZnOw is added from the side spout, it is fairly obvious not only to have reduced mixing energy consumption and reinforced effects.
(4) stearic acid modified dose of the present invention's use does not need to carry out in advance modification, has shortened process cycle and has avoided secondary pollution, practices thrift cost and protection environment.
(5) the present invention is moderate to equipment requirements, constant product quality, and performance index are excellent.
Below in conjunction with accompanying drawing and embodiment, the present invention is further specified.
Description of drawings
Fig. 1 is preparing method's of the present invention process flow sheet;
Fig. 2 a adds 11% calcium sulfate whisker modified back Vestolen PP 7052 profile scanning Electronic Speculum Photomicrograph for the present invention;
Fig. 2 b adds Vestolen PP 7052 profile scanning Electronic Speculum Photomicrograph after the 2% ZnOw modification for the present invention;
Fig. 3 is calcium sulfate crystal whiskers and the composite influence to the PP tensile property of ZnOw/calcium sulfate crystal whiskers under the identical addition of the present invention.
Embodiment
Embodiment 1: see Fig. 1, and a kind of preparation method of high-strength fire-retarding polypropylene modified material, it may further comprise the steps:
(1) with the pure material particle of Vestolen PP 7052 under 60 ℃～120 ℃ drying temperature dry two hours;
(2) calcium sulfate crystal whiskers is even by addition and the pure material mix particles of Vestolen PP 7052 set;
(3) in the mixture of this calcium sulfate crystal whiskers and the pure material particle of Vestolen PP 7052, add to set the dispersion agent of mass percent and stir it is mixed;
(4) temperature and the screw speed of setting twin screw extruder; The extrusion temperature of this twin screw extruder is 175 ℃～190 ℃; The adjusting screw(rod) rotating speed is 120r/min～180r/min, the last mixture that forms in this step (3) is joined mix in the twin screw extruder and extrude continuously;
(5) treat that discharge port begins discharging after, being 1%～5% ZnOw with mass percent mouthful is joined in the twin screw extruder and is mixed, extrudes by the side position material of this twin screw extruder;
(6) material that mixes after extruding in the step (5) is cut granulation, and particle drying under 60 ℃～120 ℃ drying temperature can be obtained the high-strength fire-retarding polypropylene particles in two hours.
In the said step (2), the mass percent of this calcium sulfate crystal whiskers is 1%～20%.
In the said step (2), the mass percent of the pure material particle of Vestolen PP 7052 is 72%～97%.
In the said step (3), this dispersion agent is a Triple Pressed Stearic Acid, and its mass percent is 1%～3%.
In the said step (5), the mass percent of this ZnOw is 1%～5%.
In said step (1) and (6), drying temperature is 60 ℃～120 ℃.
In the said step (4), the extrusion temperature of this twin screw extruder is 175 ℃～190 ℃, and the adjusting screw(rod) rotating speed is 120r/min～180r/min.
The prepared high-strength fire-retarding polypropylene modified material of a kind of preparation method by aforesaid high-strength fire-retarding polypropylene modified material, its raw material composition and mass percent are following:
Said dispersion agent is a Triple Pressed Stearic Acid.
Embodiment 2: see Fig. 1 to Fig. 3, the preparation method of the high-strength fire-retarding polypropylene modified material of present embodiment and high-strength fire-retarding polypropylene modified material and embodiment 1 are basic identical, and its difference is:
With mass percent 11% the pure material particle of Vestolen PP 7052 under the temperature under 60 ℃～120 ℃ the drying temperature dry 2 hours; Being that 11% calcium sulfate crystal whiskers mixes with polypropylene particles with mass percent, is that 1% Triple Pressed Stearic Acid adds in the polypropylene particles and mixes with mass percent, and it is 150r/min with screw speed that the temperature of setting twin screw extruder is 185 ℃; After treating temperature and stabilization of speed; Add the polypropylene particles mix and mix, wait to extrude stable after, be that 2% oxidation whisker is added in the twin screw extruder by the side spout with mass percent; The side spout is positioned at the stage casing of twin screw mixing extruding zone; Totally five sections, mix and extrude back cutting granulation, and particle is dry at a certain temperature.Dried particle is injection molded into batten and carries out stretching mechanical test and flame retardant test in injection moulding machine, find that the correlated performance of PP obtains significantly to improve.Fig. 2 a adds 11% calcium sulfate whisker modified back Vestolen PP 7052 profile scanning Electronic Speculum Photomicrograph for the present invention; Fig. 3 is calcium sulfate crystal whiskers and the composite influence to the PP tensile property of ZnOw/calcium sulfate crystal whiskers under the identical addition of the present invention.Following table 1 is flame retardant properties parameter behind the polypropylene modification of the present invention.
The oxygen index of PP matrix material under table 1 different conditions of mixture ratios
Embodiment 3: see Fig. 1 to Fig. 3; The preparation method of the high-strength fire-retarding polypropylene modified material of present embodiment and high-strength fire-retarding polypropylene modified material and embodiment 1,2 are basic identical, and its difference is: with mass percent is 9% the pure material particle of Vestolen PP 7052 under 60 ℃～120 ℃ drying temperature dry 2 hours, is that 9% calcium sulfate crystal whiskers mixes with polypropylene particles with mass percent; With mass percent is that 1% Triple Pressed Stearic Acid adds in the polypropylene particles and mixes; It is 150r/min with screw speed that the temperature of setting twin screw extruder is 185 ℃, treat temperature and stabilization of speed after, the polypropylene particles that adding mixes is mixed; Wait to extrude stable after; Be that 4% oxidation whisker is added by the side spout with mass percent, mix and extrude back cutting granulation, and particle is dry at a certain temperature.Dried particle is injection molded into batten and carries out stretching mechanical test and flame retardant test in injection moulding machine, find that the correlated performance of PP obtains significantly to improve.Fig. 2 b adds Vestolen PP 7052 profile scanning Electronic Speculum Photomicrograph after the 2% ZnOw modification for the present invention; Fig. 3 is calcium sulfate crystal whiskers and the composite influence to the PP tensile property of ZnOw/calcium sulfate crystal whiskers under the identical addition of the present invention.Flame retardant properties is seen table 1 behind the polypropylene modification.
Compared with prior art, the catalyzer of the present invention's preparation has following advantage:
(1) the present invention is utilizing under the simple processing condition, and is comparatively obvious to polyacrylic reinforced effects, has application promise in clinical practice.
(2) novelty of the present invention is composite according to certain ratio with calcium sulfate crystal whiskers and ZnOw, has also strengthened its flame retardant properties thereby not only improved polyacrylic mechanical property.
(3) novelty of the present invention ZnOw is added from the side spout, it is fairly obvious not only to have reduced mixing energy consumption and reinforced effects.
(4) stearic acid modified dose of the present invention's use does not need to carry out in advance modification, has shortened process cycle and has avoided secondary pollution, practices thrift cost and protection environment.
(5) the present invention is moderate to equipment requirements, constant product quality, and performance index are excellent.
Of the embodiment of the invention, adopt the preparation method and the high-strength fire-retarding polypropylene modified material of other high-strength fire-retarding polypropylene modified materials that obtain with the same or analogous method of the present invention or component, all within protection scope of the present invention.
Claims (9)
1. the preparation method of a high-strength fire-retarding polypropylene modified material is characterized in that, it may further comprise the steps:
(1) with the pure material particle of Vestolen PP 7052 under design temperature dry two hours;
(2) calcium sulfate crystal whiskers is even by addition and the pure material mix particles of Vestolen PP 7052 set;
(3) in the mixture of this calcium sulfate crystal whiskers and the pure material particle of Vestolen PP 7052, add to set the dispersion agent of mass percent and stir it is mixed;
(4) set the temperature and the screw speed of twin screw extruder, the last mixture that forms in this step (3) is joined mix in the twin screw extruder and extrude continuously;
(5) treat that discharge port begins discharging after, the ZnOw of setting mass percent mouthful is joined in the twin screw extruder by the side position material of this twin screw extruder and mixes, extrudes;
(6) material that mixes after extruding in the step (5) is cut granulation, and particle drying under the temperature of setting can be obtained the high-strength fire-retarding polypropylene particles in two hours.
2. the preparation method of high-strength fire-retarding polypropylene modified material according to claim 1 is characterized in that, in the said step (2), the mass percent of this calcium sulfate crystal whiskers is 1%～20%.
3. the preparation method of high-strength fire-retarding polypropylene modified material according to claim 1 is characterized in that, in the said step (2), the mass percent of the pure material particle of Vestolen PP 7052 is 72%～97%.
4. the preparation method of high-strength fire-retarding polypropylene modified material according to claim 1 is characterized in that, in the said step (3), this dispersion agent is a Triple Pressed Stearic Acid, and its mass percent is 1%～3%.
5. the preparation method of high-strength fire-retarding polypropylene modified material according to claim 1 is characterized in that, in the said step (5), the mass percent of this ZnOw is 1%～5%.
6. the preparation method of high-strength fire-retarding polypropylene modified material according to claim 1 is characterized in that, in said step (1) and (6), drying temperature is 60 ℃～120 ℃.
7. the preparation method of high-strength fire-retarding polypropylene modified material according to claim 1 is characterized in that, in the said step (4), the extrusion temperature of this twin screw extruder is 175 ℃～190 ℃, and the adjusting screw(rod) rotating speed is 120r/min～180r/min.
8. the high-strength fire-retarding polypropylene modified material by the said method preparation of claim 1 is characterized in that, its raw material composition and mass percent are following:
9. high-strength fire-retarding polypropylene modified material according to claim 8 is characterized in that, said dispersion agent is a Triple Pressed Stearic Acid.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106519441A (en) * | 2016-11-10 | 2017-03-22 | 界首市华腾塑业有限公司 | Process for efficiently modifying waste polypropylene in green manner |
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| CN1611532A (en) * | 2003-10-29 | 2005-05-04 | 中国科学院化学研究所 | Inorganic whisper reinforced polyolefin composite material in-situ filled polymerization preparing method |
| CN101693776A (en) * | 2009-09-18 | 2010-04-14 | 苏州禾盛新型材料股份有限公司 | Novel high-intensity high heat-resistance polypropylene modified composite material and preparation method thereof |
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| CN1611532A (en) * | 2003-10-29 | 2005-05-04 | 中国科学院化学研究所 | Inorganic whisper reinforced polyolefin composite material in-situ filled polymerization preparing method |
| CN101693776A (en) * | 2009-09-18 | 2010-04-14 | 苏州禾盛新型材料股份有限公司 | Novel high-intensity high heat-resistance polypropylene modified composite material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106519441A (en) * | 2016-11-10 | 2017-03-22 | 界首市华腾塑业有限公司 | Process for efficiently modifying waste polypropylene in green manner |
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Effective date of registration: 20201216 Address after: 2 / F, building 16, No. 906, Asia Pacific Road, Nanhu District, Jiaxing City, Zhejiang Province, 314000 Patentee after: SHANGHAI UNIVERSITY (ZHEJIANG JIAXING) EMERGING INDUSTRY Research Institute Address before: 523000 Songshan Lake Science and Technology Industrial Park, Dongguan City, Guangdong Province, No. 9 Building, First Floor Patentee before: DONGGUAN-SHU INSTITUTE OF NANOTECHNOLOGY Patentee before: Shanghai University |
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