CN105504509A - Wall-shrink-resisting modified polypropylene material - Google Patents
Wall-shrink-resisting modified polypropylene material Download PDFInfo
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- CN105504509A CN105504509A CN201610001892.6A CN201610001892A CN105504509A CN 105504509 A CN105504509 A CN 105504509A CN 201610001892 A CN201610001892 A CN 201610001892A CN 105504509 A CN105504509 A CN 105504509A
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- polypropylene
- nonshrink
- modified polypropylene
- polypropylene material
- wall
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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
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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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
- 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
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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
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a wall-shrink-resisting modified polypropylene material. The wall-shrinkage-resisting modified polypropylene material is characterized by being prepared from, by mass, 50%-70% of polypropylene, 10%-15% of grafting polypropylene, 5%-20% of PS resin, 2%-5% of a solubilizer, 10%-35% of silicone whiskers and 1%-3% of an auxiliary, wherein the solubilier is selected from one or a combination of SEPS, SEBS and SBS. The wall-shrinkage-resisting modified polypropylene material is excellent in shrink mark resistance, outstanding in product appearance and quality and capable of being applied to appearance products such as household appliances and automobiles which have the higher requirements for the appearance.
Description
Technical field
The present invention relates to a kind of nonshrink wall modified polypropylene material, belong to technical field of polymer materials.
Background technology
Acrylic resin is as a kind of environmentally friendly material, and its use range expands rapidly.But due to polypropylene material, cooling curing speed is slow after moulding, the position of variation in thickness is there is in product, easily there is shrink mark phenomenon, shrink mark refers to the local dent formed at article surface, shrink mark often produces in the larger region of local wall thickness, the back side of muscle or thrust, does not obtain enough compensation produce by product thick wall part when cooling.This surface imperfection has a strong impact on the appearance looks elegant degree of goods, and still visible after spray coating, strongly limit the use of polypropylene material in appearance part.
Research shows, the formation of shrink mark is except outside the Pass having with product design, die design, moulding process etc., also there are much relations with material itself, first, crystalline material more easily produces shrink mark for amorphous material, because crystalline material is from molten state to the process of room temperature, molecular chain ordered arrangement forms crystal.Polypropylene material belongs to crystalline material, and shrinking percentage own is large, so be easy to produce shrink mark, secondly, the viscosity of material and filling additive etc. should also have very large impact to the product of shrink mark.
Chinese patent CN102816384B discloses the fiber glass reinforced polypropylene material of the low warpage of a kind of shallow shrink mark and method for making thereof and application, it has selected polypropylene and the short glass fiber of high-crystallinity, although the generation of shrink mark can be reduced to a certain extent, but glass emergence on the surface phenomenon is easily caused, and affect material glossiness, moreover this polypropylene product does not improve shrink mark problem to a great extent, only estimate degree better, still can not meet the demands for more high-grade exterior trimming parts.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of nonshrink wall modified polypropylene material.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of nonshrink wall modified polypropylene material, is characterized in that, be prepared from by the raw material comprising following component, each component by mass percentage:
Polypropylene: 50-70%, graft polypropylene 10-15%, PS resin 5-20%, solubilizing agent 2-5%, silicon whisker 10-35%, auxiliary agent 1-3%, described solubilizing agent is selected from one in SEPS, SEBS and SBS or its combination.Wherein SEPS, SEBS and SBS refer to respectively: styrene ethylene-propylene-styrene type segmented copolymer, styrene-ethylene-butylene-styrene block copolymer and styrene-butadiene-styrene block copolymer.Both solubilizing agent effect used in combination is more excellent.
Preferably, described silicon whisker is the active silicon whisker after silane coupling agent surface coating modification.Silane coupling agent is silane coupling agent KH560 more preferably, and this coupling agent is dispersed better.
Preferably, the staple length of described silicon whisker is 2-10 μm, and clad ratio is not less than 90%.
Preferably, described graft polypropylene be selected from itaconic acid grafted polypropylene, polypropylene grafted toxilic acid, polypropylene grafted vinylformic acid, polypropylene grafted maleic anhydride one or more, percentage of grafting is 0.8-1.5%.
Preferably, described PS resin is the mixture of foamed polystyrene resin and high-impact polystyrene resin.
Preferably, described auxiliary agent comprises more than one in oxidation inhibitor, fire retardant, the agent of wax class damage resistant.
Hinge structure, the beneficial effect that the present invention reaches:
(1) the nonshrink trace excellent performance of product of the present invention, product appearance quality is given prominence to, and can meet in the higher looking products such as household electrical appliance, automobile of appearance requirement;
(2) silicon whisker compares glass fibre not only the advantage in price (its price only has 1/2 of short glass fiber), exposing of glass can be eliminated, and its thermostability is high, make product size stability higher with coordinating of other components of the present invention, particularly with the addition of the polypropylene material of the active silicon whisker after silane coupling agent surface coating modification, contraction on its parallel and perpendicular flow direction reduces all greatly, and shrink mark obviously improves;
(3) intensity of both joint effect materials of PS resin and solubilizing agent (SEPS/SEBS/SBS) and viscosity, particularly viscosity, material obtains suitable mobility can reduce punch die resistance, improves pressurize feeding effect, improves the shrink mark of product.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
The preparation method that polypropylene material preparation method for material of the present invention all can use this area conventional, comprise melt-blending process, following examples and comparative example all use melt-blending process to prepare sample, and wherein the temperature of twin screw extruder is set to 160-250 DEG C.Following component all by weight percentage.
Embodiment 1-4
The composition of raw materials of embodiment 1-4 is as shown in table 1, preparation method is melt-blending process, and wherein, the staple length of silicon whisker is 2-10 μm, silane clad ratio is 90%, auxiliary agent comprises oxidation inhibitor well known in the art, fire retardant and the agent of wax class damage resistant, and in embodiment 1, graft polypropylene is polypropylene grafted maleic anhydride, percentage of grafting 1.2%, embodiment 2 is polypropylene grafted toxilic acid, percentage of grafting 0.8%, embodiment 3 and embodiment 4 are polypropylene grafted vinylformic acid, percentage of grafting 1.4%.PS resin is the mixture of foamed polystyrene resin and high-impact polystyrene resin.
Comparative example 1-3
The composition of raw materials of comparative example 1-3 is as shown in table 1, sample preparation methods is with embodiment 3, be melt-blending process, wherein comparative example 1 is to change silicon whisker into short glass fiber with the difference of embodiment 3, comparative example 2 is not add PS resin (i.e. polystyrene resin) with the difference of embodiment 3, and comparative example 3 is not add solubilizing agent with the difference of embodiment 3.
Table 1: embodiment and comparative example polypropylene material material formula:
| Numbering | Polypropylene | Graft polypropylene | PS resin | Solubilizing agent | Silicon whisker | Auxiliary agent |
| Embodiment 1 | 50% | 15% | 5% | SEPS and SEBS:2% | 27% | 1% |
| Embodiment 2 | 57% | 10% | 20% | SEPS and SEBS:2% | 10% | 2% |
| Embodiment 3 | 60% | 10% | 15% | SEPS and SBS:3% | 11% | 1% |
| Embodiment 4 | 50% | 10% | 5% | SEPS and SBS: 5% | 28% | 2% |
| Comparative example 1 | 60% | 10% | 15% | SEPS and SBS: 3% | Chopped glass fiber 11% | 1% |
| Comparative example 2 | 65% | 10% | Nothing | SEPS and SBS: 3% | 21% | 1% |
| Comparative example 3 | 63% | 10% | 15% | Nothing | 11% | 1% |
Performance test:
The sample prepared by embodiment 1-4 and comparative example 1-3 carries out performance test, test result in table 2, wherein: bending property is tested according to GB/T9341-2008; Izod notched impact strength is tested according to GB/T1043-2008; Shrinking trace test employing instrument is: step instrument, test condition is: sweep length: 10mm, sweep velocity: 0.03mm/s, setting range: 100um.
Table 2: embodiment and comparative example the performance test results:
| Test event | Unit | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Flexural strength | MPa | 98.6 | 112.2 | 129.2 | 102.3 | 127.6 | 86.1 | 90.2 |
| Bending elastic modulus | MPa | 3016 | 4098 | 5216 | 3986 | 5019 | 2987 | 3010 |
| Izod notched impact strength 23 DEG C | kJ/m 2 | 20.1 | 25.6 | 28.1 | 21.9 | 26.1 | 18.1 | 23.2 |
| The shrink mark degree of depth | μm | 3.0 | 2.8 | 2.1 | 3.1 | 7.1 | 5.1 | 5.5 |
As seen from Table 2, the polypropylene material shrink mark degree of depth of the present invention obviously improves, and the shrink mark of the sample appearance surface range estimation of embodiment 1-4 is all very shallow, almost can't see, polypropylene product visual appearance of the present invention is higher compared with commercial goods, and has the advantage in price.Active silicon whisker ensure that the mechanical property of material while improving surface quality, and PS resin and solubilizing agent jointly use and plays great role to reduction polypropylene material shrink mark.
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 technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (6)
1. a nonshrink wall modified polypropylene material, is characterized in that, is prepared from by the raw material comprising following component, each component by mass percentage:
Polypropylene: 50-70%, graft polypropylene 10-15%, PS resin 5-20%, solubilizing agent 2-5%, silicon whisker 10-35%, auxiliary agent 1-3%, described solubilizing agent is selected from one in SEPS, SEBS and SBS or its combination.
2. the nonshrink wall modified polypropylene material of one according to claim 1, is characterized in that, described silicon whisker is the active silicon whisker after silane coupling agent surface coating modification.
3. the nonshrink wall modified polypropylene material of one according to claim 2, is characterized in that, the staple length of described silicon whisker is 2-10 μm, and clad ratio is not less than 90%.
4. the nonshrink wall modified polypropylene material of the one according to any one of claim 1-3, it is characterized in that, described graft polypropylene be selected from itaconic acid grafted polypropylene, polypropylene grafted toxilic acid, polypropylene grafted vinylformic acid, polypropylene grafted maleic anhydride one or more, percentage of grafting is 0.8-1.5%.
5. the nonshrink wall modified polypropylene material of one according to claim 4, is characterized in that, described PS resin is the mixture of foamed polystyrene resin and high-impact polystyrene resin.
6. the nonshrink wall modified polypropylene material of one according to claim 5, is characterized in that, described auxiliary agent comprise in oxidation inhibitor, fire retardant, the agent of wax class damage resistant more than one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610001892.6A CN105504509A (en) | 2016-01-05 | 2016-01-05 | Wall-shrink-resisting modified polypropylene material |
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| CN201610001892.6A CN105504509A (en) | 2016-01-05 | 2016-01-05 | Wall-shrink-resisting modified polypropylene material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110452461A (en) * | 2019-08-19 | 2019-11-15 | 汕头市精通实业有限公司 | A kind of polypropylene modification plastics |
| CN110982174A (en) * | 2019-11-29 | 2020-04-10 | 苏州润佳高分子材料有限公司 | Shallow sink mark reinforced polypropylene material for automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN110982174A (en) * | 2019-11-29 | 2020-04-10 | 苏州润佳高分子材料有限公司 | Shallow sink mark reinforced polypropylene material for automobile |
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Application publication date: 20160420 |
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