CN102329458A - Polypropylene combination and preparation method thereof - Google Patents
Polypropylene combination and preparation method thereof Download PDFInfo
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- CN102329458A CN102329458A CN201110165474A CN201110165474A CN102329458A CN 102329458 A CN102329458 A CN 102329458A CN 201110165474 A CN201110165474 A CN 201110165474A CN 201110165474 A CN201110165474 A CN 201110165474A CN 102329458 A CN102329458 A CN 102329458A
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- nucleator
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- linear expansion
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Abstract
The invention discloses a polypropylene combination and a preparation method thereof. The polypropylene combination consists of the following components in percentage by weight: 40-82% of polypropylene resin, 2-20% of high impact polystyrene, 15-40% of talcum powder and 0.05-0.2% of nucleating agent, and the nucleating agent is alpha-nucleating agent. An automotive workpiece made of a polypropylene material provided by the invention not only has a low linear expansion coefficient, but also has isotropy; the automotive workpiece has a stable size and a small assembly clearance; and the use of an automobile in different temperature environments is met. Through testing, various performances of an automotive part made of the polypropylene material provided by the invention all can reach use requirements; the linear expansion coefficient is low; furthermore, the automotive part has isotropy; the automotive workpiece has the stable size and the small clearance; and the use standards of the automobile are met.
Description
Technical field
The present invention relates to polypropene composition, be specifically related to the polypropene composition of low coefficient of linear expansion (CLTE).
Background technology
Vestolen PP 7052 has advantages such as light weight, anti-solvent, easy processing, excellent mechanical property, easy recovery because of it, obtained widespread use, and particularly the application at automotive industry, household electrical appliances and mechanical field improves constantly.Automotive industry will develop to directions such as energy-saving and environmental protection, safety future.This just requires, and used quality of materials is light, processing is simple, be prone to recovery etc., and Vestolen PP 7052 has satisfied these requirements.But the coefficient of linear expansion of polypropylene material is bigger, and size is unstable, is difficult to satisfy the requirement of automotive part dimensional stability.Automotive part is meant automotive upholstery and exterior trimming parts.Inside gadget comprises test board, auxiliary fasia console, column, glove box, door-plate, trunk plate, threshold etc.; Exterior trimming parts comprises collision bumper, rubbing strip, beater or beat-up and splash pan etc.
Along with the development and the progress of automotive industry technology, it is increasingly high that automobile attractive in appearance requires, so the notion in " 0-gap " is suggested.When " 0-gap " is meant that automotive part is on the assembling automobile, require the fit-up gap between the different products as far as possible little, and dimensional stabilizing.This just requires the coefficient of linear expansion of polypropylene material lower.The automotive part that particularly test board, collision bumper etc. are big and thin has lower demand to the Vestolen PP 7052 coefficient of linear expansion.In order to satisfy the demand in " 0-gap ", require polypropylene material not only to have low coefficient of linear expansion, also to have etc. to coefficient of linear expansion.The modified polypropylene material that is used for automobile need have favorable rigidity, high workability and impact property, needs to add filler raising rigidity such as talcum powder, adds elastomerics and improves toughness, so it is the material of component more than.Coefficient of linear expansion in melt flow direction (FD or MD) and perpendicular flow direction (TD) in the time of will being created in the injection molded automobile product produces huge difference; As material be 80 μ m/m/ ℃ at the coefficient of linear expansion of FD direction; And the TD direction is 170 μ m/m/ ℃; Can not satisfy the design requirements of automobile, particularly high-grade Automobile Design demand.If coefficient of linear expansion is excessive and on FD and TD direction difference excessive, will cause product such as fascia at excessive clearance under the bigger environment of temperature head and between other product, cause distortion, cause bayonet socket to come off when serious, influence visual appearance.Isocline property coefficient of expansion material is at FD and its value basically identical of TD direction.So it is extremely urgent to solve polypropylene material coefficient of linear expansion defect problem big and that different directions difference is big.
In order to satisfy the requirement of automotive part, people have proposed to reduce the method for coefficient of linear expansion.CN101624459A discloses the compsn of the acrylic resin with low-shrinkage and dimensional stability.This invention provides a kind of have relative higher rigidity and shock resistance and the relatively low molding shrinkage and the polypropene composition of coefficient of linear expansion.CN1834145A discloses polypropylene composite material for automobile bumper and preparation method, and this material has high polarity and low coefficient of linear expansion.But these two patents are not mentioned the coefficient of linear expansion situation at FD and TD, can't judge this invention whether have all to coefficient of linear expansion.
Along with the automobile usage quantity increases year by year, the automobile production Absatzvolumen also increases year by year.This will use by driving automobile product polypropylene material.Wherein have low and all constantly enlarge to the PP composite material demand of coefficient of linear expansion.The present invention has satisfied this request for utilization.
Summary of the invention
The objective of the invention is to the deficiency that exists to prior art, provide a kind of and be used for injection moulding and have low and all to the polypropene composition of coefficient of linear expansion.
Another object of the present invention is to provide the preparation method of above-mentioned polypropene composition.
To achieve these goals, the present invention adopts following technical scheme:
A kind of polypropene composition, form by the component of following weight percentage:
Acrylic resin 40 ~ 82%;
High-impact polystyrene 2 ~ 20%;
Talcum powder 15 ~ 40%;
Nucleator 0.05 ~ 0.2%;
Said nucleator is α-nucleator.
Said acrylic resin is preferably the COPP resin, and its melt mass flow rate (MFR) is 5 ~ 60g/10min, and its socle girder notched Izod impact strength is at>=5KJ/m
2(23 ℃).
Said talcum powder median size size (D
50) be 3 ~ 15 μ m, D
97Be 10 ~ 35 μ m.Talcous particle diameter is used D always
50With D
97Expression.D
50The expression particle diameter accounts for 50% greater than its particle, also accounts for 50% less than its particle, i.e. median size.D
97The expression particle diameter accounts for 97% less than its particle.Laser diffractometry is adopted in the test of particle diameter.
Said α-nucleator is preferably 2,2 '-methylene radical-two (4,6-di-t-butyl phenoxy) sodium phosphate, two (the 4-tertiary butyl-phenoxy) sodium phosphate, two [2; 2-methylene radical-two (4,6-di-t-butyl phenoxy) phosphoric acid oxyaluminum], two (2-alkyl, 4-alkyl phenoxy) phosphoric acid salt, two the ring [2; 2; 1] mixture of heptane dicarboxylicacid sodium and two rings a kind of or two kinds of nucleators in [2,2,1] heptane dicarboxylicacid calcium.
The preparation method of above-mentioned polypropene composition, after comprising the steps: each component mixed, through twin screw extruder, melting mixing, the melting mixing temperature is 170 ~ 230 ℃, screw slenderness ratio is not less than 32, extruding pelletization, packing gets final product.
Compared with prior art; The present invention has following beneficial effect: the automotive part of polypropylene material preparation of the present invention not only has low coefficient of linear expansion, and it has equal tropism, the dimensional stabilizing of automotive part; The fit-up gap is little, satisfies automobile and under the differing temps environment, uses.The process test, the trolley part of polypropylene material preparation of the present invention, its various performances all reach request for utilization, and coefficient of linear expansion is low and have equal tropism, the dimensional stabilizing of automotive part, the gap is little, satisfies automobile and uses standard with extensive.
Polypropene composition of the present invention can be used for preparing automobile and uses product, and automotive part is meant automotive upholstery and exterior trimming parts.Inside gadget comprises test board, auxiliary fasia console, column, glove box, door-plate, trunk plate, threshold etc.; Exterior trimming parts comprises collision bumper, rubbing strip, beater or beat-up and splash pan etc.By the standard testing sample by CJ80C type injection moulding machine at 200 ~ 230 ℃ of temperature compacted unders.Condition of molding and specimen preparation meet the requirement of ISO294.1-96 and ISO1873.2-97.
Embodiment
Testing method:
(1) coefficient of linear expansion:, use the test of thermo-mechanical analysis (TMA) method according to the ISO11359-2 standard testing.Range of measuring temp is-30 ℃～80 ℃.
Material property in the embodiment of the invention:
PP1: COPP, melt mass flow rate are 30g/10min (2.16kg, 230 ℃), and the socle girder notched Izod impact strength is 8KJ/m
2(23 ℃);
PP2: COPP, melt mass flow rate are 20g/10min (2.16kg, 230 ℃), and the socle girder notched Izod impact strength is 40KJ/m
2(23 ℃);
Talc1: talcum powder, particle diameter D
50Be 5.2 μ m and D
97Be 20 μ m;
Nucleator 1:2,2 '-methylene radical-two (4,6-di-t-butyl phenoxy) sodium phosphate;
Nucleator 2: two [2,2-methylene radical-two (4,6-di-t-butyl phenoxy) phosphoric acid oxyaluminum];
Nucleator 3:, two the ring [2,2,1] heptane dicarboxylicacid sodium;
Nucleator 4: Sodium Benzoate.
Embodiment 1 has the polypropene composition of low coefficient of linear expansion
The polypropene composition of present embodiment, its composition is as shown in table 1.
Table 1 polypropene composition is formed and coefficient of linear expansion
The polypropene composition of present embodiment, its preparation method is following:
Weigh up by its usage ratio by the said raw material of table 1, after mixing, add twin screw extruder, melting mixing under 190 ~ 210 ℃ temperature, extruding pelletization, water-cooled, air-dry, particle diameter is 3mm, packing gets final product.
Coefficient of linear expansion result by each embodiment and Comparative Examples can find out; The present invention has overcome the coefficient of linear expansion inequality for preparing in the prior art to shortcoming; Make product size under the differing temps environment uses more stable, satisfy the request for utilization and the car gage in " 0-gap ".
Claims (4)
1. polypropene composition is characterized in that being made up of the component of following weight percentage:
Acrylic resin 40 ~ 82%;
High-impact polystyrene 2 ~ 20%;
Talcum powder 15 ~ 40%;
Nucleator 0.05 ~ 0.2%;
Said nucleator is α-nucleator.
2. polypropene composition according to claim 1 is characterized in that: said acrylic resin is the COPP resin, and its melt mass flow rate (MFR) is 5 ~ 60g/10min, and its socle girder notched Izod impact strength is at>=5KJ/m
2(23 ℃).
3. polypropene composition according to claim 1 is characterized in that: said α-nucleator is 2,2 '-methylene radical-two (4; 6-di-t-butyl phenoxy) sodium phosphate, two (the 4-tertiary butyl-phenoxy) sodium phosphate, two [2; 2-methylene radical-two (4,6-di-t-butyl phenoxy) phosphoric acid oxyaluminum], two (2-alkyl, 4-alkyl phenoxy) phosphoric acid salt, two the ring [2; 2; 1] mixture of heptane dicarboxylicacid sodium and two rings a kind of or two kinds of nucleators in [2,2,1] heptane dicarboxylicacid calcium.
4. the preparation method of the said polypropene composition of claim 1 is after it is characterized in that comprising the steps: each component mixed, through twin screw extruder; Melting mixing, the melting mixing temperature is 170 ~ 230 ℃, screw slenderness ratio is not less than 32; Extruding pelletization, packing gets final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110165474A CN102329458A (en) | 2011-06-20 | 2011-06-20 | Polypropylene combination and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110165474A CN102329458A (en) | 2011-06-20 | 2011-06-20 | Polypropylene combination and preparation method thereof |
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|---|---|
| CN102329458A true CN102329458A (en) | 2012-01-25 |
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103665541A (en) * | 2013-11-04 | 2014-03-26 | 惠州新大都合成材料科技有限公司 | Low-after-contraction polypropylene composite material manufactured by controlling fluidity and preparation method thereof |
| CN104066782A (en) * | 2012-02-01 | 2014-09-24 | 博里利斯股份公司 | Talc containing polypropylene composition with excellent thermomechanical properties |
| CN104204104A (en) * | 2012-03-27 | 2014-12-10 | 积水化学工业株式会社 | Resin composite material |
| CN114438621A (en) * | 2020-10-30 | 2022-05-06 | 中国石油化工股份有限公司 | Polypropylene antistatic composition, expanded bead, preparation method thereof and molded body |
-
2011
- 2011-06-20 CN CN201110165474A patent/CN102329458A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104066782A (en) * | 2012-02-01 | 2014-09-24 | 博里利斯股份公司 | Talc containing polypropylene composition with excellent thermomechanical properties |
| CN104204104A (en) * | 2012-03-27 | 2014-12-10 | 积水化学工业株式会社 | Resin composite material |
| CN103665541A (en) * | 2013-11-04 | 2014-03-26 | 惠州新大都合成材料科技有限公司 | Low-after-contraction polypropylene composite material manufactured by controlling fluidity and preparation method thereof |
| CN103665541B (en) * | 2013-11-04 | 2015-10-28 | 惠州新大都合成材料科技有限公司 | A kind of low post shrinkage polypropylene composite material and preparation method thereof controlling mobility and manufacture |
| CN114438621A (en) * | 2020-10-30 | 2022-05-06 | 中国石油化工股份有限公司 | Polypropylene antistatic composition, expanded bead, preparation method thereof and molded body |
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Application publication date: 20120125 |