CN106117696A - A kind of weather-proof high-density polyethylene material of high shading - Google Patents
A kind of weather-proof high-density polyethylene material of high shading Download PDFInfo
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- CN106117696A CN106117696A CN201610324446.9A CN201610324446A CN106117696A CN 106117696 A CN106117696 A CN 106117696A CN 201610324446 A CN201610324446 A CN 201610324446A CN 106117696 A CN106117696 A CN 106117696A
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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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- C08K2201/00—Specific properties of additives
- C08K2201/016—Additives defined by their aspect ratio
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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Abstract
The invention discloses a kind of weather-proof high-density polyethylene material of high shading, it is mixed by following components by mass percentage: high density polyethylene (HDPE) 80 95%, modified attapulgite powder 1 8%, titanium dioxide 0.1 10%, maleic anhydride grafted polyethylene 1 5%, UV absorbent 0.1 1%, antioxidant 0.5 1%.The present invention has the resistance to UV aging of excellence out of doors, and service life is long, the good mechanical properties of material.
Description
Technical field
The present invention relates to a kind of high-density polyethylene material, particularly to a kind of high shading weather-proof high density polyethylene (HDPE) material
Material.
Background technology
High density polyethylene (HDPE) (High Density Polyethylene, referred to as " HDPE "), also known as low-pressure polyethylene, is
A kind of degree of crystallinity thermoplastic resin high, nonpolar.The milky appearance of ortho states HDPE, is a certain degree of in meagre cross section
Translucent.PE has excellent resistance to great majority life and the characteristic of chemicals for industrial use.
HDPE is a kind of degree of crystallinity thermoplastic resin high, nonpolar.High density polyethylene (HDPE) is kind of a white powder graininess
Product, nontoxic, tasteless, density is in the range of 0.940～0.976g/cm3；Degree of crystallinity is 80%～90%, softening point be 125～
135 DEG C, use temperature up to 100 DEG C；Fusion temperature 120～160 DEG C, for the material that molecule is bigger, it is proposed that fusion temperature model
It is trapped among between 200～250 DEG C.It has good thermostability and tolerance to cold, and chemical stability is good, also have higher rigidity and
Toughness, mechanical strength is good.Dielectric properties, environmental stress crack resistance is preferable.Hardness, hot strength and creep properties are better than low close
Degree polyethylene；Wearability, electrical insulating property, toughness and tolerance to cold are all preferable, but compare with low-density insulating properties the poorest；Chemistry is steady
Qualitative good, at ambient temperature, insoluble in any organic solvent, acid and alkali resistance and the corrosion of various salt；Thin film to steam and
The permeability of air is little, water absorption is low；Loss of properties on aging, ESCR is not so good as Low Density Polyethylene, the hottest oxygen
Change effect can make its hydraulic performance decline, so, resin need to add antioxidant and UV absorbent etc. and improve and improve this respect
Not enough.
Pure high density polyethylene out of doors under the conditions of resistance to UV aging poor, therefore, in order to improve high density
Polyethylene resistance to UV aging, often adds UV absorbent, but, a small amount of interpolation can not be effectively improved the anti-of HDPE
Ultraviolet ageing performance, and add UV absorbent in a large number, then can substantially reduce the mechanical property of material.Additionally, HDPE is usual
Can add opacifier titanium dioxide and improve resistance to UV aging, titanium dioxide has the highest photocatalytic activity, adds material to
Can cause the degraded of polyethylene in material system, reduce weatherability and the service life of high density polyethylene (HDPE), titanium dioxide is with highly dense
The compatibility of degree polyethylene is poor, causes the tension fracture elongation rate of material to decline rapidly.
Summary of the invention
It is an object of the invention to provide a kind of weather-proof high-density polyethylene material of high shading, there is excellence anti-out of doors
Ultraviolet ageing performance, service life is long, the good mechanical properties of material.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of weather-proof high-density polyethylene material of high shading, is mixed by following components: highly dense by mass percentage
Degree polyethylene 80-95%, modified attapulgite powder 1-8%, titanium dioxide 0.1-10%, maleic anhydride grafted polyethylene 1-5% are purple
Ultraviolet absorbers 0.1-1%, antioxidant 0.5-1%.
The core of the present invention is to add modified attapulgite powder, utilizes the high length-diameter ratio after surface modification, nanometer and sub-micro
Meter ruler cun attapulgite, carries out composite with high density polyethylene (HDPE), modified attapulgite powder in material system as reinforcing agent
With efficient nucleation agent and cation capture agent, material system is remarkably reinforced and toughening effect.Additionally, surface modification is concavo-convex
Rod powder has bigger specific surface area and stronger absorbability, as the carrier of efficient hindered amine as light stabilizer, and profit
With crystal structure and the nano-scale of its uniqueness, the degree of scatter of hindered amine as light stabilizer can be improved, significantly reduce hindered amine light
The addition of stabilizer.
The present invention adds maleic anhydride grafted polyethylene in the material, can be remarkably reinforced titanium dioxide and high density polyethylene (HDPE)
The compatibility, improve material tension fracture elongation rate.
As preferably, described modified attapulgite powder is prepared by following steps:
(1) attapulgite is calcined at 400-450 DEG C 90-120min, after cooling, pulverize, sieve, obtain attapulgite；
(2) by the dimethyl sulphoxide solution of attapulgite and mass concentration 20-30%, attapulgite it is uniformly mixed to obtain
Powder dispersion liquid；By attapulgite is added in dimethyl sulphoxide solution, it is possible to make attapulgite be uniformly dispersed, be so beneficial to
Follow-up acid solution oxidation modification.Acid solution enables to attapulgite hydrophilic to be reduced, and lipophile increases, thus improves concavo-convex
Rod powder and the adhesion of high density polyethylene (HDPE).
(3) after adding acid solution stirring and evenly mixing in attapulgite dispersion liquid, supersound process 10-30min, filters, respectively
With water and absolute ethanol washing, at 70-80 DEG C, then it is vacuum dried 2-3h obtains primary modified attapulgite powder；
(4) the titanate coupling agent ethanol solution that mass concentration is 50-60% is mixed with primary modified attapulgite powder
Close 10-30min, then add the silane coupler ethanol solution mixing 10-30min that mass concentration is 50-60%, so
It is vacuum dried 30-60min at latter 80-100 DEG C, obtains intermediate modified attapulgite powder.
(5) by middle rank modified attapulgite powder and hindered amine as light stabilizer banburying 30-60min in 150-180 DEG C of banbury
After, grind to obtain modified attapulgite powder.
Primary modified attapulgite powder is relatively thin due to granule, easily reunites, is so unfavorable for following process, and to composite
Performance have considerable influence.Inventor, by finding after long-term experimentation, first passes through use titanate coupling agent to primary
Modified attapulgite powder carries out for the first time surface and processes, after again by adding the silane coupler primary modified attapulgite to processing
Powder carries out second time surface and processes, and so can effectively solve the problem that primary modified attapulgite powder ball is poly-, make silane coupler have
The parcel primary modified attapulgite powder of effect, further prevents the reunion of primary modified attapulgite powder, for follow-up and high density
Effective place mat effect has been carried out in the mixing of polyethylene, and due to the process of coupling agent, primary modified attapulgite powder gathers with high density
Ethylene mixes evenly, and bond strength is more preferable, and the composite material compositions of formation is uniform, and mechanical property is good.Titanate coupling agent,
Silane coupler is all made into the form of ethanol solution to be added, so good with the mixing uniformity of primary modified attapulgite powder,
Onset is good.
As preferably, in step (2), the dimethyl sulphoxide solution consumption of mass concentration 20-30% is that every gram of attapulgite makes
Use 10-15mL.
As preferably, acid solution described in step (3) be mass concentration be that the salpeter solution of 5-10% is with mass concentration
The acetic acid solution of 10-15% is according to the mixture of 1:3-5 volume ratio.The specific acid solution of the present invention is changing for attapulgite
Property design, it is possible to effectively making attapulgite hydrophilic reduce, lipophile increases, thus it is poly-to improve attapulgite and high density
The adhesion of ethylene, thus strengthen the enhancing of attapulgite, toughening effect.
As preferably, in step (4), the consumption of titanate coupling agent is the 0.2-of primary modified attapulgite grain weight amount
0.3%, the consumption of silane coupler is the 1-1.5% of primary modified attapulgite grain weight amount.
As preferably, the percent mass proportioning of middle rank modified attapulgite powder described in step (5) and hindered amine as light stabilizer
For: middle rank modified attapulgite powder 50-80%, hindered amine as light stabilizer 20-50%, both summations are 100%；Described hindered amine light
One or more in polymerized hindered amine light stabilizer, N-substituted alkoxy hindered amine as light stabilizer of stabilizer.Polymerization
Type hindered amine as light stabilizer, the model of N-substituted alkoxy hindered amine as light stabilizer may select light stabilizer 944, CYasorb
UV3346、Chimassorbr2020、Tinuvin622、Tinuvin123、Tinvin317、HS200、HS950、HS300。
As preferably, granularity D of described modified attapulgite powder50For 20nm-150nm, draw ratio is 10-50:1.Attapulgite
Soil draw ratio 10-50:1, has activeness and quietness effect in the composite so that hot strength improves 10%.
As preferably, described antioxidant is selected from antioxidant 1010, antioxidant 1076, irgasfos 168, antioxidant 1098, resists
One or more in oxygen agent P-EPQ, antioxidant PEP-36A, antioxidant 300, antioxidant S-9299.
As preferably, described ultraviolet absorber is selected from the one or several in UV-234, UV-531, UV-4602, UV-3638F
Kind.
As preferably, using after described titania modified process, modification processing method is: put into by titanium dioxide powder
In plasma reactor, evacuation, empty electric discharge is removed impurity in reactor, is regulated mass flow controller, be passed through tetrafluoro second
One or more gases in alkene, freon, ethylene, open plasma generator and fluidizer, discharge polymerization；Plasma
Reactor according parameter is set to: operating frequency 13.56MHz, discharge power 10-30W, and 20-60min, pulsed and compared 20-discharge time
50%, oscillating width 50-100ms, the powder body after discharge polymerization terminates, after collection process.Using plasma technology of the present invention,
Tetrafluoroethene, freon, ethylene etc. are coated on titanium dioxide surface, the photocatalytic activity of titanium dioxide can be significantly reduced,
Making titanium dioxide surface hydrophobicity increase simultaneously, improve the compatibility of material, the impact on mechanical property is substantially reduced.
The invention has the beneficial effects as follows: there is the resistance to UV aging of excellence out of doors, according to ASTMG155 test mark
Standard, at 0.55W/m2, 6000 hours after-drawing elongation retentions ＞ 70% of 340nm ultraviolet light and aging.Service life is long, is
25 years as long as, the good mechanical properties of material.
Detailed description of the invention
Below by specific embodiment, technical scheme is described in further detail.
In the present invention, if not refering in particular to, the raw material used and equipment etc. are all commercially available or commonly used in the art.
Method in following embodiment, if no special instructions, is the conventional method of this area.
Total embodiment:
A kind of weather-proof high-density polyethylene material of high shading, is mixed by following components: highly dense by mass percentage
Degree polyethylene (commercially available, melt index about 0.5-5g/10min, test condition: 190 DEG C, 21.6kg) 80-95%, modified attapulgite
Powder 1-8%, titanium dioxide (granularity D50It is 1 μm-5 μm) 0.1-10%, maleic anhydride grafted polyethylene 1-5%, ultra-violet absorption
Agent 0.1-1%, antioxidant 0.5-1%.
Described modified attapulgite powder is prepared by following steps:
(1) attapulgite is calcined at 400-450 DEG C 90-120min, after cooling, pulverize, sieve, obtain attapulgite.
(2) by the dimethyl sulphoxide solution of attapulgite and mass concentration 20-30%, the two of mass concentration 20-30%
Methyl sulfoxide solution usage is that every gram of attapulgite uses 10-15mL, is uniformly mixed to obtain attapulgite dispersion liquid.
(3) after adding acid solution stirring and evenly mixing in attapulgite dispersion liquid, supersound process 10-30min, filters, respectively
With water and absolute ethanol washing, at 70-80 DEG C, then it is vacuum dried 2-3h obtains primary modified attapulgite powder.Acid solution is quality
Concentration is the salpeter solution of 5-10% and the acetic acid solution mixture according to 1:3-5 volume ratio that mass concentration is 10-15%.
(4) the titanate coupling agent ethanol solution that mass concentration is 50-60% is mixed with primary modified attapulgite powder
Close 10-30min, then add silane coupler (KH570) the ethanol solution mixing 10-that mass concentration is 50-60%
30min, is then vacuum dried 30-60min at 80-100 DEG C, obtains intermediate modified attapulgite powder；The consumption of titanate coupling agent is
The 0.2-0.3% of primary modified attapulgite grain weight amount, the consumption of silane coupler is the 1-of primary modified attapulgite grain weight amount
1.5%.
(5) by middle rank modified attapulgite powder and hindered amine as light stabilizer banburying 30-60min in 150-180 DEG C of banbury
After, grind to obtain modified attapulgite powder.Described middle rank modified attapulgite powder with the percent mass proportioning of hindered amine as light stabilizer is: in
Level modified attapulgite powder 50-80%, hindered amine as light stabilizer 20-50%, both summations are 100%.Described hindered amine light stabilizer
Agent one or several in polymerized hindered amine light stabilizer (commercially available), N-substituted alkoxy hindered amine as light stabilizer (commercially available)
Kind.Hindered amine as light stabilizer model may select light stabilizer 944, CYasorb UV3346, Chimassorbr2020,
Tinuvin622、Tinuvin123、Tinvin317、HS200、HS950、HS300。
Granularity D of modified attapulgite powder50For 20nm-150nm, draw ratio is 10-50:1.Described antioxidant (commercially available) is selected from
Antioxidant 1010, antioxidant 1076, irgasfos 168, antioxidant 1098, antioxidant P-EPQ, antioxidant PEP-36A, antioxidant
300, one or more in antioxidant S-9299.Described ultraviolet absorber (commercially available) selected from UV-234, UV-531, UV-4602,
One or more in UV-3638F.Maleic anhydride grafted polyethylene (commercially available), selected from Du Pont E100, E158, M603, E528,
The one or more combinations such as Exxon Mobil Exxelor PE 1040.
Using after the most described titania modified process, modification processing method is: put into by 20g titanium dioxide powder
In plasma reactor, being evacuated to about 10Pa, empty electric discharge 5min and remove impurity in reactor, regulation mass flow controls
Device, one or more gases being passed through in tetrafluoroethene, freon, ethylene, open plasma generator and fluidizer, put
Electropolymerization；Plasma reactor parameter is set to: operating frequency 13.56MHz, discharge power 10-30W, discharge time 20-
60min, pulse ratio 20-50%, oscillating width 50-100ms, the powder body after discharge polymerization terminates, after collection process.Concrete real
Execute, implement the present invention with the material mixture ratio of table 1.
Table 1:
| Formula | Comparative example 1 | Comparative example 2 | Comparative example 3 | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| HDPE (%) | 93.6 | 91.4 | 89 | 94 | 92 | 90 | 90 |
| Hindered amine as light stabilizer (%) | 0.4 | 0.6 | 1 | 0 | 0 | 0 | 0 |
| Attapulgite (%) | 2 | 2 | 2 | 0 | 0 | 0 | 0 |
| Modified attapulgite powder (%) | 0 | 0 | 0 | 2 | 2 | 2 | 2 |
| Titanium dioxide (%) | 1 | 3 | 5 | 0 | 0 | 0 | 5 |
| Modifying titanium dioxide (%) | 0 | 0 | 0 | 1 | 3 | 5 | 0 |
| PE-g-MAH (%) | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Irgasfos 168 (%) | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
| Antioxidant 1076 (%) | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
| UV-531 (%) | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Add up to | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
Wherein, in embodiment 1 in modified attapulgite powder: middle rank modified attapulgite powder 80%, hindered amine as light stabilizer 20%.
In embodiment 2 in modified attapulgite powder: middle rank modified attapulgite powder 70%, hindered amine as light stabilizer 30%.Modification in embodiment 3
In attapulgite: middle rank modified attapulgite powder 50%, hindered amine as light stabilizer 50%.In embodiment 4 in modified attapulgite powder: in
Level modified attapulgite powder 50%, hindered amine as light stabilizer 50%.
The present invention can obtain multiple product, these products can by extrusion, be molded or the technique such as blowing is processed, it is thus achieved that
One series products, can be used for outdoor products, and the most outdoor resistance to long-term UV is aging and the field such as life-time service.
Carrying out melt blending with double screw extruder, batten prepared by injection machine.
Extruder barrel temperature: 1 120 DEG C of district, 2 140 DEG C of districts, 3 150 DEG C of districts, 4 165 DEG C of districts, 175 DEG C of 5-9 district；10 districts 190
DEG C, head temperature 200 DEG C.
Injection machine barrel zone temperature: 1 165 DEG C of district, 2 180 DEG C of districts, 3 200 DEG C of districts；Head temperature 200 DEG C；Dwell time: 2s.
The product test of the present invention the results are shown in Table 2:
Table 2:
As seen from the results in Table 2, compared with unmodified attapulgite, unmodified titanium dioxide, the present invention has the anti-of excellence
Ultraviolet ageing performance, service life is long, and the mechanical property of material is more preferable.
Embodiment described above is the one preferably scheme of the present invention, not makees the present invention any pro forma
Limit, on the premise of without departing from the technical scheme described in claim, also have other variant and remodeling.
Claims (10)
1. the weather-proof high-density polyethylene material of high shading, it is characterised in that: mixed by following components by mass percentage
Making: high density polyethylene (HDPE) 80-95%, modified attapulgite powder 1-8%, titanium dioxide 0.1-10%, maleic anhydride is grafted poly-second
Alkene 1-5%, UV absorbent 0.1-1%, antioxidant 0.5-1%.
The weather-proof high-density polyethylene material of the high shading of one the most according to claim 1, it is characterised in that: described modification is recessed
Convex rod powder is prepared by following steps:
(1) attapulgite is calcined at 400-450 DEG C 90-120min, after cooling, pulverize, sieve, obtain attapulgite；
(2) by the dimethyl sulphoxide solution of attapulgite and mass concentration 20-30%, be uniformly mixed attapulgite divides
Dissipate liquid；
(3) after adding acid solution stirring and evenly mixing in attapulgite dispersion liquid, supersound process 10-30min, filters, uses water respectively
And absolute ethanol washing, at 70-80 DEG C, then it is vacuum dried 2-3h obtains primary modified attapulgite powder；
(4) by titanate coupling agent ethanol solution that mass concentration is 50-60% and primary modified attapulgite powder mixing 10-
30min, then adds silane coupler ethanol solution mixing 10-30min, then 80-that mass concentration is 50-60%
It is vacuum dried 30-60min at 100 DEG C, obtains intermediate modified attapulgite powder；
(5) middle rank modified attapulgite powder and hindered amine as light stabilizer after banburying 30-60min, are ground in 150-180 DEG C of banbury
Grind to obtain modified attapulgite powder.
The weather-proof high-density polyethylene material of the high shading of one the most according to claim 2, it is characterised in that: in step (2)
The dimethyl sulphoxide solution consumption of mass concentration 20-30% is that every gram of attapulgite uses 10-15mL.
The weather-proof high-density polyethylene material of the high shading of one the most according to claim 2, it is characterised in that: in step (3)
Described acid solution be mass concentration be salpeter solution and the mass concentration of 5-10% be that the acetic acid solution of 10-15% is according to 1:3-5
The mixture of volume ratio.
The weather-proof high-density polyethylene material of the high shading of one the most according to claim 2, it is characterised in that: in step (4)
The consumption of titanate coupling agent is the 0.2-0.3% of primary modified attapulgite grain weight amount, and the consumption of silane coupler is that primary changes
The 1-1.5% of property attapulgite weight.
The weather-proof high-density polyethylene material of the high shading of one the most according to claim 2, it is characterised in that: in step (5)
Described middle rank modified attapulgite powder with the percent mass proportioning of hindered amine as light stabilizer is: middle rank modified attapulgite powder 50-80%,
Hindered amine as light stabilizer 20-50%, both summations are 100%；Described hindered amine as light stabilizer is steady selected from polymerized hindered amine light
Determine one or more in agent, N-substituted alkoxy hindered amine as light stabilizer.
The weather-proof high-density polyethylene material of the high shading of one the most according to claim 1 and 2, it is characterised in that change described in:
Granularity D of property attapulgite50For 20nm-150nm, draw ratio is 10-50:1.
The weather-proof high-density polyethylene material of the high shading of one the most according to claim 1 and 2, it is characterised in that: described anti-
Oxygen agent selected from antioxidant 1010, antioxidant 1076, irgasfos 168, antioxidant 1098, antioxidant P-EPQ, antioxidant PEP-36A,
One or more in antioxidant 300, antioxidant S-9299.
The weather-proof high-density polyethylene material of the high shading of one the most according to claim 1 and 2, it is characterised in that: described purple
One or more in UV-234, UV-531, UV-4602, UV-3638F of outer absorbent.
The weather-proof high-density polyethylene material of the high shading of one the most according to claim 1 and 2, it is characterised in that: described two
Using after titanium oxide modification, modification processing method is: titanium dioxide powder is put into plasma reactor, takes out true
Sky, empty electric discharge is removed impurity in reactor, is regulated mass flow controller, be passed through the one in tetrafluoroethene, freon, ethylene
Or several gas, open plasma generator and fluidizer, discharge polymerization；Plasma reactor parameter is set to: work
Working frequency 13.56MHz, discharge power 10-30W, discharge time 20-60min, pulse ratio 20-50%, oscillating width 50-
100ms, the powder body after discharge polymerization terminates, after collection process.
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| CN113337026A (en) * | 2021-06-25 | 2021-09-03 | 广西顺通高分子材料科技有限公司 | Preparation process of corrosion-resistant PE drain pipe |
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