CN106554558A - Easy-formation heat-proof polythene compositionss - Google Patents
Easy-formation heat-proof polythene compositionss Download PDFInfo
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- CN106554558A CN106554558A CN201510641952.6A CN201510641952A CN106554558A CN 106554558 A CN106554558 A CN 106554558A CN 201510641952 A CN201510641952 A CN 201510641952A CN 106554558 A CN106554558 A CN 106554558A
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- easy
- formation heat
- proof polythene
- compositionss
- antioxidant
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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
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
-
- 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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Abstract
The invention belongs to polymeric material field, and in particular to a kind of easy-formation heat-proof polythene compositionss.It is made up of the component of following parts by weight：100 parts of polyvinyl resin, antioxidant 0.2-0.5 parts, processing aid 0.04-0.06 parts.In polyvinyl resin, thickness is less than 6.1nm platelets percent ranges for 7.3-9.0, and thickness is more than 13.3nm platelets percent ranges for 64.0-68.0, two kinds of thickness platelet ratios:6.5<x/y<9.5.Polyethylene composition of the present invention has good pressure performance, pliability and higher crystallization temperature and crystalline rate.Can be used to produce the production such as floor heating pipe, solar pipe, advantageously ensure that the performance and used life of tubing, improve production efficiency, reduce production cost.
Description
Technical field
The invention belongs to polymeric material field, and in particular to a kind of easy-formation heat-proof polythene compositionss.
Background technology
Heat-proof polythene (Polyethylene of raised temperature resistance, abbreviation PE-RT) tube material is newest one
For heat-resistant tube and geothermal tube special plastic, be in recent years tubing industry gradually a kind of adopted resistance to hot press performance it is remarkable need not
The polyethylene of crosslinking, can be applicable to the production of the hot and cold water conveyance conduit with heat resistant requirements, and such as floor heating, heat are handed over
Parallel operation, solar pipe and oil transportation tubing etc..
Heat-proof polythene tube material speed of production is higher, and hauling speed reaches as high as 40m/min, it is desirable to which tube material has good adding
Work performance, and the needs of the rapid shaping during rapid processing will be met, to prevent tubing from producing change when uncolled complete
Shape, affects the tubing later stage to use and the life-span.The crystallization temperature of tube material determines its molding cycle size, and crystallization temperature is higher, says
Bright its crystalline rate is very fast, and molding time is shorter.During tube forming, main at present employing reduces cooling water temperature, carries
The modes such as high cooling water inflow, meet tubing High-speed machining needs, but need the higher fund of input to buy cooling device, and safeguard
It is relatively costly.
In polyethylene, add nucleator improve Resin crystallization, improve its crystalline rate, but tube material is firm after adding nucleator
Property increase be unfavorable for construction and price is higher, the impact to tubing Long Service Life does not have, and there is potential safety hazard
With the problem for increasing cost.
Chinese patent CN102197082A《Polyethylene with faster crystalline rate and the environmental stress crack resistance for improving》,
One kind is disclosed comprising nucleator and multimodal polyethylene, low-molecular-weight ethylenic of the multimodal polyethylene comprising 25-50 weight % is equal
The high molecular weight ethylene copolymer of copolymer component, the middle-molecular-weihydroxyethyl ethylene copolymer component of 25-50 weight % and 25-50 weight %
Component.The polyethylene composition with according to ASTM D1693, condition B, measure in 100%Igepal more than or wait
The half of in the environmental stress crack resistances of 40 days and less than or equal to the multimodal polyethylene flexible chain for not having nucleator 70%
Crystallization time.The method is formed by various ingredients blending, and component and preparation process are complicated, while nucleator is relatively costly and is difficult
Dispersion, prepares composition properties unstable.
The content of the invention
It is an object of the invention to provide a kind of easy-formation heat-proof polythene compositionss, with good pressure performance, pliability and compared with
High crystallization temperature and crystalline rate.
Easy-formation heat-proof polythene compositionss of the present invention, are made up of the component of following parts by weight：Polyvinyl resin 100
Part, antioxidant 0.2-0.5 parts and processing aid 0.04-0.06 parts；
Wherein：In polyvinyl resin, thickness is 7.3-9.0% less than the weight/mass percentage composition of 6.1nm platelets, and thickness is more than 13.3nm
The weight/mass percentage composition of platelet is 64.0-68.0%.
Polyethylene composition of the present invention is a kind of with higher simply supported beam notch impact strength, crystallization temperature and faster
Crystalline rate polyethylene composition, can be used to produce the production such as floor heating pipe, solar pipe, advantageously ensures that the performance of tubing and make
With the life-span, improve production efficiency, reduce production cost.
The thick part correspondence molecule that branching content is few, methylene sequences are regular and longer of platelet in tube material；The thin part of platelet
Correspondence branching content is high, the irregular molecule of chain structure.Pressure performance, knot of the distribution and content of two kinds of size platelets to tube material
The importants such as brilliant speed, mechanical property, particularly have decisive role to crystal property.In polyvinyl resin of the present invention
Thickness is 7.3-9.0% less than the weight/mass percentage composition of 6.1nm platelets, and preferred 7.8-8.7%, thickness are more than the matter of 13.3nm platelets
Amount percentage composition is 64.0-68.0%, preferred 65.0-67.0%, using the polyvinyl resin of this kind of performance, it is possible to increase product
Pressure performance, crystalline rate, mechanical property and crystal property.Through creative research, thickness is more than 13.3nm platelets and thickness
Less than 6.1nm platelets mass ratio be 6.5-9.5：1, the properties of product are optimum.
For polyvinyl resin, density determines the intensity of resin, such as hydrostatic strength, tensile strength, bending moduluses etc.,
But density is too high to reduce the performances such as the resistance to slow crack growth and pliability of material., through research, polyvinyl resin is close for the present invention
Degree adopts 0.932-0.936g/cm3, preferably 0.933～0.935g/cm3, with good pliability, combination property is optimum, is easy to
Floor heating is constructed；Under 2.16 kilograms of loads, melt mass flow rate (MFR) determines the processing characteristics and molecular size range of resin,
The present invention is selected as 0.60-0.70g/10min, preferred 0.62-0.67g/10min through research, melt mass flow rate, it is ensured that
The processing of tube material and combination property.
Polyvinyl resin is the copolymer of ethylene and 1- hexenes.
Polyvinyl resin is polymerized using gas-phase process with 1- hexenes for ethylene, reaction temperature 83-90 DEG C, reaction pressure
2.0-2.2Mpa, catalyst are metallocene catalyst, and metallocene catalyst is the common commercial products in this area.
When tube material is with air contact, chemical reaction can be carried out with the oxygen in air and be oxidized, be a kind of typical free radical
Reaction.Antioxidant is added in tube material, can with plastic material in because oxidation produce oxyradical R.、ROO.Reaction, in
The growth of disconnected living chain, so as to effectively suppress or reduce the degraded of plastic material, ageing process, extends the use of plastic
Life-span.Antioxidant of the present invention is the compound of Hinered phenols antioxidant and phosphite kind antioxidant.Preferably Hinered phenols antioxygen
Agent is 1 with the mass ratio of phosphite kind antioxidant：1-1.3, antioxidant of the present invention be 0.2-0.5 parts, preferred 0.3-0.4 parts.
Hinered phenols antioxidant be four [methyl-β-(3,5- di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol esters or β-
Three (3,5- di-t-butyl -4- of the positive octadecanol ester of (3,5- di-tert-butyl-hydroxy phenyls) propanoic acid or 1,3,5- trimethyls -2,4,6-
Hydroxybenzyl) -2,4,6 (1H, 3H, 5H)-triketone of benzene or 1,3,5- tri- (3,5- di-tert-butyl-4-hydroxyl benzyls) -1,3,5- triazines；Phosphorous
Acid esters kind antioxidant is that three [2.4- di-tert-butyl-phenyls] phosphite esters or double (2,4- DI-tert-butylphenol compounds) tetramethylolmethanes two are sub-
Phosphate ester or diphosphorous acid tetramethylolmethane distearyl alcohol ester.
For the processing characteristics of optimum organization thing, also add processing aid, processing aid my fluoro containing polymerses polymer processing aidses
PPA, the mass content of fluorine in fluoro containing polymerses polymer processing aidses PPA>7%, processing aid addition is preferably
0.05-0.06。
The present invention compared with prior art, has the advantages that：
(1) polyethylene composition of the present invention, with good pressure performance, pliability and higher crystallization temperature and knot
Brilliant speed.Simply supported beam notch impact strength>75kJ/m2, crystallization temperature>118 DEG C, the growth rate (G) of spherocrystal when 119 DEG C>0.5
min-1, 70 DEG C, hydrostatic test under the conditions of 6.3MPa>6877h.
(2) present invention has obtained a kind of with higher freely-supported by selecting the structural parameters such as resin lamellae thickness and relative amount
Beam notch impact strength, crystallization temperature and crystalline rate polyethylene composition faster, can be used to produce floor heating pipe, solar pipe
Deng production, the performance and used life of tubing is advantageously ensured that, improve production efficiency, reduce production cost.
(3) China's house quickly grows, and building construction completion area, real estate investment continuously increase, the conveying of Building Cooling water,
The construction area of heating occupies significant proportion, and the market space is big；Development of China's Urbanization is accelerated, and drives urban infrastructure construction development,
The purposes plastic conduits such as the conveying of Building Cooling water, floor heating are requisite materials, and demand is continuously increased.Therefore, PE-RT pipes
Material field will be fast-developing, and market potential is huge.
Specific embodiment
With reference to embodiment, the present invention will be further described.
In embodiment and comparative example, polyethylene, resin density is carried out according to GB/T 1033.2-2010, using D methods, boils 30 points
Test after clock；Melt mass flow rate (MFR) is tested by GB/T 3682-2000, is loaded as 2.16kg；SSA is adopted
With differential scanning calorimeter (DSC) test, spontaneous nucleation temperature spot for (125,120,115,110,105,100,95,
90th, 85,80) DEG C, temperature rate is 25 DEG C/min.
Embodiment 1-5
The proportioning component that embodiment 1-5 is used for the polyethylene resin composition of hot water pipeline is as shown in table 1.
The polyethylene resin composition table (in parts by weight) of 1 embodiment 1-5 hot water pipeline of table
In table, "-" is represented.
The preparation method of embodiment 1-5 is：
A) polyvinyl resin, antioxidant and processing aid agent are put into high-speed mixer stirring to mix, 1200 revs/min of speed of agitator,
Mixing time 10min, whipping temp are less than 40 DEG C；
B) material of mix homogeneously is added to into melting in double screw extruder, plasticizing, extrusion, pelletize.Screw slenderness ratio is 35:1,
220 DEG C of processing temperature.
Comparative example 1-3
The proportioning component that comparative example 1-3 is used for the polyethylene resin composition of hot water pipeline is as shown in table 2.
The polyethylene resin composition table (in parts by weight) of 2 comparative example of table, 1～3 hot water pipeline
In table, "-" is represented.
The preparation method of comparative example 1-3 is：
A) by heat-proof polythene resin, antioxidant, processing aid agent are put into high-speed mixer stirring mixing, 1200 turns of speed of agitator
/ point, mixing time 10min, whipping temp are less than 40 DEG C；
B) material of mix homogeneously is added to into melting in double screw extruder, plasticizing, extrusion, pelletize.Screw slenderness ratio is 35:1,
220 DEG C of processing temperature.
The resin combination that embodiment 1-5 and comparative example 1-3 are prepared carries out performance test：
By the resin combination of embodiment 1～5 and comparative example 1～3 Jing after high-speed mixer blending, twin screw pelletize at 190～230 DEG C,
Standard batten is made after mold pressing procedure.According to GB/T1040.2-2006 test fracture norminal strains；According to GB/T 19466.6-2009
Test oxidation induction time (OIT)；Crystallization temperature is tested using isothermal crystal, is heated to 165 DEG C, and constant temperature 5min is eliminating sample
The thermal history of product；Sample is cooled to the isothermal crystal temperature selected with the rate of temperature fall of 50 DEG C/min, constant temperature 30min,
It is complete to ensure sample crystallization；Record heat flow curve, obtains isothermal crystal temperature, when 119 DEG C are calculated according to Avrami equations
Flexible chain t1/2, flexible chain t1/2Inverse directly representing growth rate G of spherocrystal；Compositionss are prepared into
After the tubing of ф 20*2.0mm specifications, the hydrostatic strength of tubing is tested according to GB/T 18252-2000.
In embodiment 1-5 and comparative example 1-3, polyvinyl resin (PE-RT) is ethylene and the copolymer of 1- hexenes.
The performance test results of the resin combination that embodiment 1-5 is prepared are shown in Table 3, the resin group that comparative example 1-3 is prepared
The performance test results of compound are shown in Table 4.
The performance test results of the resin combination that 3 embodiment 1-5 of table is prepared
Note：Tubular object extruding technique：210 DEG C of the molten temperature of 215-195 DEG C of head of 170-195 DEG C of machine barrel, hauling speed 21m/min
The performance test results of the resin combination that 4 comparative example 1-3 of table is prepared
Note：Tubular object extruding technique：210 DEG C of the molten temperature of 215-195 DEG C of head of 170-195 DEG C of machine barrel, hauling speed 21m/min
From the performance test results contrast of table 3-4 as can be seen that embodiment 1-5 material has higher simply supported beam notch shock strong
Degree, crystallization temperature and crystalline rate faster.
Claims (10)
1. a kind of easy-formation heat-proof polythene compositionss, it is characterised in that：It is made up of the component of following parts by weight：Polyethylene tree
100 parts of fat, antioxidant 0.2-0.5 parts and processing aid 0.04-0.06 parts；
Wherein：In polyvinyl resin, thickness is 7.3-9.0% less than the weight/mass percentage composition of 6.1nm platelets, and thickness is more than 13.3nm
The weight/mass percentage composition of platelet is 64.0-68.0%.
2. easy-formation heat-proof polythene compositionss according to claim 1, it is characterised in that：Thickness is more than 13.3nm pieces
The brilliant mass ratio that 6.1nm platelets are less than with thickness is 6.5-9.5：1.
3. easy-formation heat-proof polythene compositionss according to claim 1, it is characterised in that：Polyethylene, resin density
0.932-0.936g/cm3；Melt mass flow rate is 0.60-0.70g/10min.
4. easy-formation heat-proof polythene compositionss according to claim 1, it is characterised in that：Polyvinyl resin be ethylene with
The copolymer of 1- hexenes.
5. easy-formation heat-proof polythene compositionss according to claim 1, it is characterised in that：Polyvinyl resin is ethylene
It is polymerized using gas-phase process with 1- hexenes, reaction temperature 83-90 DEG C, reaction pressure 2.0-2.2Mpa, catalyst are urged for metallocene
Agent.
6. according to the arbitrary described easy-formation heat-proof polythene compositionss of claim 1-5, it is characterised in that：Antioxidant is to be obstructed
The compound of phenolic antioxidant and phosphite kind antioxidant.
7. easy-formation heat-proof polythene compositionss according to claim 6, it is characterised in that：Hinered phenols antioxidant with
The mass ratio of phosphite kind antioxidant is 1：1-1.3.
8. easy-formation heat-proof polythene compositionss according to claim 6, it is characterised in that：Hinered phenols antioxidant is
Four [methyl-β-(3,5- di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol esters or β-(3,5- di-t-butyl -4- hydroxy benzeness
Base) the positive octadecanol ester of propanoic acid or three (3,5- di-tert-butyl-4-hydroxyl benzyls) benzene of 1,3,5- trimethyls -2,4,6- or 1,3,5-
- 2,4,6 (1H, 3H, 5H)-triketone of three (3,5- di-tert-butyl-4-hydroxyl benzyls) -1,3,5- triazines；Phosphite ester kind antioxidant is three [2.4-
Di-tert-butyl-phenyl] phosphite ester or double (2,4- DI-tert-butylphenol compounds) pentaerythritol diphosphites or diphosphorous acid season
Penta tetrol distearyl alcohol ester.
9. according to the arbitrary described easy-formation heat-proof polythene compositionss of claim 1-5, it is characterised in that：Processing aid be containing
Fluorine high molecular polymer processing aid PPA.
10. easy-formation heat-proof polythene compositionss according to claim 9, it is characterised in that：Fluoro containing polymerses polymer
The mass content of fluorine in processing aid PPA>7%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679835A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | High-density polyethylene resin composition for floating photovoltaic barrel and preparation method thereof |
| CN112679640A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | High-density polyethylene resin for floating photovoltaic barrel and preparation method thereof |
| CN115521530A (en) * | 2021-06-25 | 2022-12-27 | 中国石油化工股份有限公司 | High-density polyethylene resin composition and preparation method thereof |
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| WO2003102075A1 (en) * | 2002-06-04 | 2003-12-11 | Union Carbide Chemicals & Plastics Technology Corporation | Polymer compositions and method of making pipes thereof |
| CN102952323A (en) * | 2011-08-31 | 2013-03-06 | 中国石油化工股份有限公司 | PE-RT (polyethylene of raised temperature resistance) composition and application thereof |
| CN103160014A (en) * | 2011-12-15 | 2013-06-19 | 中国石油化工股份有限公司 | Polyethylene resin composition for hot-water pipeline and preparation method thereof |
-
2015
- 2015-09-30 CN CN201510641952.6A patent/CN106554558B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003102075A1 (en) * | 2002-06-04 | 2003-12-11 | Union Carbide Chemicals & Plastics Technology Corporation | Polymer compositions and method of making pipes thereof |
| CN102952323A (en) * | 2011-08-31 | 2013-03-06 | 中国石油化工股份有限公司 | PE-RT (polyethylene of raised temperature resistance) composition and application thereof |
| CN103160014A (en) * | 2011-12-15 | 2013-06-19 | 中国石油化工股份有限公司 | Polyethylene resin composition for hot-water pipeline and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679835A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | High-density polyethylene resin composition for floating photovoltaic barrel and preparation method thereof |
| CN112679640A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | High-density polyethylene resin for floating photovoltaic barrel and preparation method thereof |
| CN112679835B (en) * | 2019-10-18 | 2022-10-14 | 中国石油化工股份有限公司 | High-density polyethylene resin composition for floating photovoltaic barrel and preparation method thereof |
| CN115521530A (en) * | 2021-06-25 | 2022-12-27 | 中国石油化工股份有限公司 | High-density polyethylene resin composition and preparation method thereof |
| CN115521530B (en) * | 2021-06-25 | 2023-08-11 | 中国石油化工股份有限公司 | High-density polyethylene resin composition and preparation method thereof |
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