CN108026342A - For rotational moulding application can non-frozen grinding based on polyacrylic compound - Google Patents
For rotational moulding application can non-frozen grinding based on polyacrylic compound Download PDFInfo
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- CN108026342A CN108026342A CN201680053054.1A CN201680053054A CN108026342A CN 108026342 A CN108026342 A CN 108026342A CN 201680053054 A CN201680053054 A CN 201680053054A CN 108026342 A CN108026342 A CN 108026342A
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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
- C08L23/14—Copolymers of propene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/14—Copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/16—Ethene-propene or ethene-propene-diene copolymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
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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)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The present invention relates to the method for being used to prepare powdery polymer composition, including：Composition is provided, said composition includes at least one polypropylene of 65 to 95 parts by weight, it is selected from the group being made of homopolymer, anti-impact polymer, random copolymer or their mixture, at least one polyethylene of 5 to 30 parts by weight, it is selected from the group being made of high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene, the copolymer of ethylene, propylene or their mixture, and at least one additive of 0.0005 to 7 parts by weight；And at a temperature of at least 0 DEG C, preferably 10 30 DEG C pulverising step a) composition.
Description
Technical field
The present invention relates to the polypropylene composite for rotational moulding product.
Background technology
Conventional material for rotational moulding application is linear low density polyethylene (LLDPE), it provides impact resistance and rigidity
Particular balance performance and with conventional disk formula flour mill grind ability.LLDPE is stored in applied at elevated temperature, such as industry heat
There is its limitation in water tank or medical chemistry container.
In order to be applicable to higher some rotational moulding products both mechanically and thermally, it is contemplated that polypropylene, polyamide etc..
In order to grind, these materials need refrigeration system (as defined below) so that production cost is higher than conventional disk formula flour mill
Several times.
In order to avoid expensive Freezing smashing, the polypropylene (PP) for rotational moulding can be produced in the form of granules.
A diameter of about 1000 μm of PP little particles are produced using high pressure granulating system.The PP of this form can be easily processed and rotational moulding.
However, PP granules still need higher processing temperature but have the process window more narrower than LLDPE, and the product of rotational moulding
The defects of surface is still main.Even if production cost is PP powder less than Freezing smashing, but compared to the output of extruder,
Granules throughput rate is low-down.So total conversion cost is still too many without reducing.
Polypropylene for rotational moulding is significant lower in terms of impact resistance and has poor machinability and product
Appearance.For higher operating temperature and higher rigidity, its expenditure is much larger than routine PE.
Prior art discloses the composition for rotational moulding for some.
2008/009392 A1 of WO disclose the polymer composition for rotational moulding, wherein the composition includes:(i)
At least two propylene polymer components；And (ii) nucleator.
US 7332543B2 disclose the polymer composition suitable for rotational moulding, and it includes Alathon or copolymer；
Or I) Noblen or copolymer；And II) Alathon or the copolymer with least one other C3-10 alhpa olefins, its
With the melt flow rate (MFR) in the 40% of the melt flow rate (MFR) of component (I), the molecular weight distribution of (Mw/Mn) less than 4,
Mw in the 30% of the Mw of component (I), the density of 0.880g/cm3 to 0.940g/cm3, the density ratio component (I) it is close
Spend small at least 0.010g/cm3, and the fusing point of low at least 5 DEG C of the fusing point than component (I)；Or (II) Noblen with least
A kind of other C2-10 alhpa olefins or copolymer, it has melt flows in the 40% of the melt flow rate (MFR) of component (I)
Speed, the molecular weight distribution of (Mw/Mn) less than 4, the Mw in the 30% of the Mw of component (I), and the fusing point than component (I)
Low at least 10 degrees Celsius of fusing point.
WO2013/096696 discloses rotational moulding composition, and it includes the thermoplastic polymer of at least 95 percentage by weights；With
The metal oxide flakes of 0.1 to 3 percentage by weight；Wherein rotational moulding composition is characterized in that at least one of following performance：
(a) reservation with least 85% elongation at break after the accelerated ageing when 4000 is small；Or (b) relative to without the gold
Belong to the analogous composition of oxide films improves with least 50% ductility.
It is therefore an object of the present invention to provide the method for being used to prepare powdery polymer composition, it overcomes the prior art
The shortcomings that, especially overcome the high production cost of Freezing smashing, be used for rotational moulding and with elevated operating temperature, the machine balanced to obtain
The PP of tool performance and good finished appearance.
The content of the invention
This purpose is by being realized including the following method for being used to prepare powdery polymer composition：A) combination is provided
Thing, it includes aa) at least one polypropylene of 65 to 95 parts by weight, it is selected from by homopolymer, anti-impact polymer, random copolymer
Or the group of their mixture composition, bb) 5 to 30 parts by weight at least one polyethylene, it is selected from by high density polyethylene (HDPE), low
The group that density polyethylene, linear low density polyethylene, the copolymer of ethylene-propylene or their mixture form, and cc) 0,
At least one additive of 0005 to 7 parts by weight；And b) the pulverising step a at a temperature of at least 0 DEG C, preferably 10-30 DEG C
Composition.
Polypropylene (PP) is generally classified as three types, i.e. homopolymer, random copolymer and block copolymer.Random copolymerization
Thing PP and ethylene comonomer random copolymerization.
For the present invention, impact copolymer is that it contains PP of the ethylene-propylene rubber (ERP) as impact modifier.
In the compositions of the present invention, the amount of component can preferably by weight percentage, and condition is that each components total reaches
100 percentage by weights.That is it is this it is preferable in the case of, component aa), i.e., polyacrylic amount can be no more than 94.9995
Percentage by weight.
Preferably, composition further includes 0.005 to 0.5, the thermoplastic polyester bullet of preferably 0.1 to 0.3 parts by weight
Property body.
In a preferred embodiment, at least one additive includes
A) at least one sterically hindered phenolic antioxidant of 0.0005-10 parts by weight or non-phenol antioxidant, azanol or they
Mixture,
B) processing additives having less than 10.000g/ moles of molecular weight of 0.0005 to 1 parts by weight, its be selected from by
Antioxidant based on phosphorus, preferably phosphite ester, alkyl phosphite, aryl phosphite, the aryl phosphite that is obstructed composition
Group；
C) UV stabilizer of 0.002 to 2 parts by weight, its be selected from by the molecular weight with about 800 to 1.500g/ moles by
Hinder the group of amine light stabilizer (HALS) composition.
D) thermoplastic polyester elastomer of 0.002 to 2 parts by weight；And
E) nucleator of 0 to 0.5 parts by weight.
It act as hydroperoxides decomposition under the processing conditions of polyolefin based on the antioxidant of phosphorus according to the present invention
Agent.Corresponding antioxidant prevents autoxidation by making hydroperoxides (oxidation intermediates) be reduced into alcohol.
For the present invention, nucleator is fining agent, it is to be used for polyacrylic additive to strengthen its transparency.It is commercially available
Most of fining agents be dibenzyl sorbitol (DBS) or its chemical derivative.
It is highly preferred that polyacrylic amount is in 70 to 90 parts by weight, preferably in the range of 75 to 90 parts by weight.
Most preferably, the amount of polyethylene is in 10 to 30 parts by weight, preferably in the range of 20 to 30 parts by weight.
Preferably, crushing is the crushing by means of refrigeration system.
For the present invention, refrigeration system is the system being wherein chilled to polypropylene less than -40 DEG C.In order to ensure non-
Freezing smashing, temperature are at least 0 DEG C and preferably 10 to 30 DEG C.
Freezing smashing refers to breaking method, it introduces cooling medium, and such as liquid nitrogen, is extremely less than its Tg to cool down grinding-material.
Thus material is brittle and easy grind into powder form.
Finally, method is included in the further step of rotational moulding after step b.
Inventors have surprisingly discovered that the shortcomings that method of the invention is by overcoming the prior art solves the present invention
Root problem.
In general, the purpose of the present invention obtains the side of the PP for rotational moulding by overcoming the high production cost of Freezing smashing
Method realizes that the PP has an elevated operating temperature, the mechanical performance of balance and can be with running product appearance.
Specifically, the inventors discovered that, the combination used in the method for the invention of the preferred compositions of additive is used
Thing can reduce micropore in the blend polymer system for rotational moulding application and bubble and when shortening the circulation of rotational moulding component
Between.Its preferred non-phenol antioxidant.
It is further unexpectedly discovered that the additive comprising nucleator can reduce micropore in blend polymer and
Bubble.
Finally, it was unexpectedly found that, the processing stabilizers selected from phosphinate (salt) can make blend polymer
Heat distortion temperature (HDT) increases above 10 DEG C.
The polyolefin elastomer or polyolefin plastomers that compound can include 0.05-25 percentage by weights are used for impact
Composition can be improved.
Come compounded materials and it is granulated by the double screw extruder of the mixed configuration with height at 190 DEG C.Compound
Crushing process occur in the case of without using refrigeration system in toothed disc type grinder.
Brief description of the drawings
The present invention is more fully described now with reference to specific embodiments and the drawings, wherein
Fig. 1 can non-frozen grinding PP compounds particle diameter distribution.
Embodiment
Embodiment
1-prior art of comparative example：Micronised polypropylene for rotational moulding
The antioxidant and UV stabilizer with addition for rotational moulding are processed by single screw rod or double screw extruder
Commercially available PP, micro- granulating system is installed in the wherein end of screw rod.The polymer of melting is promoted to pass through the mould and under water of pelletizing
Cutting.Typically about 800-1200 μm of the diameter of this granules product.Even if pellet is quite equal in terms of size and dimension
Even, but throughput rate is very low, and it causes high machine and conversion cost.
Embodiment 2-be used for rotational moulding non-frozen PP compounds
The random copolymer of linear low density polyethylene (MI 7g/10min) comprising 25 parts by weight, 75 parts by weight is gathered
The polypropylene composite of propylene (ethylene comonomer) (MI 12g/10min) in double screw extruder abundant mixture together,
It includes 0.05 parts by weight include non-phenol antioxidant (3114) additive, 0.1 parts by weight based on phosphorus
Stabilizer (168), 0.4 parts by weight hindered amine as light stabilizer (783) it is poly- with 0.2 parts by weight
Ester elastomer (5556)。
By PP compound grind into powder in fluted disc crusher.Dish gap is arranged to 0.6mm and using 710mm or
1000mm mesh sieves.Grinding is under full machine production.
Embodiment 3-be used for rotational moulding non-frozen PP compounds
Polypropylene composite by the linear low density polyethylene (MI 7g/10min) of 35 parts by weight, 10 parts by weight it is random
Impact copolymer polypropylene (the ethene of co-polymer polypropylene (ethylene comonomer) (MI 12g/10min) and 55 parts by weight
Comonomer) (MI 10g/10min) composition.Additive compounding method and breaking method with it is identical in example 2.
Embodiment 4-be used for rotational moulding non-frozen PP compounds
Polyacrylate compound by 30 parts by weight linear low density polyethylene (MI 7g/10min) and 70 parts by weight is random
Co-polymer polypropylene (ethylene comonomer) (MI 12g/10min) forms.Additive set group, compounding method and breaking method and
It is identical in embodiment 2.
Embodiment 5-be used for rotational moulding non-cryogenic PP compounds (change of additive)
Describe and provide the different PP compounds of non-frozen grinding performance and some formulas of additive (according to this hair
It is bright).PP can be one kind in homopolymer, impact copolymer or random copolymer.PE can be high density polyethylene (HDPE) or linear
Low density polyethylene (LDPE).The percentage of PE can be by weight 5-30, preferably by weight 20-30.Main anti-oxidant can be
The hindered phenol type of 500ppm or non-phenolic.Secondary antioxidants can be the type based on phosphorus of 1000ppm or based on phosphonous acid
The type of ester (salt).Stabilizer selection BASF (Chimasorb/Tinuvin) or Cytec (Cyasorb), HALS, content is
2000–4000ppm。
Compounding method is identical with embodiment 2.After grinding, these formula (tables are assessed with rotational moulding application test
3)。
Table 1
As a result and discuss
Embodiment 1-4's is both mechanically and thermally shown in table 1.Major requirement for PP grades of rotational moulding is applied at elevated temperature.So
HDT and bending modulus are emphasis (having rational impact resistance).The PP compounds of embodiment 2 and 3 (according to the present invention) are in height
Temperature is lower to have high-dimensional stability, as shown in HDT.However, comparative example 2 and 4, higher LLDPE compositions incline in example 4
To in improvement attrition process；But especially at the working temperature, it causes less than PP for the relatively low of the requirement of rotational moulding
Overall mechanical properties.The benefit of the embodiment of the present invention 2-4 is can be ground in the case of no refrigeration system.Embodiment 2
Assessment with 3 grinding performance is shown in table 2 and Fig. 1.
Because pure PP cannot be crushed under non-frozen system to form powder, there is one kind by being prepared as granules
The method of form and the pure PP of use, it needs not move through crushing before molding.Therefore, because it does not pass through crushing process,
So the grinding performance of comparative example 1 cannot be assessed.
Change dish gap and sieve mesh to optimize particle size distribution.Height can be obtained when using 710 hole sizers and 0.4 μm of gap
Spend uniform particle size.
Embodiment 4 describes some formulas with good rotational moulding machinability.The non-main AO of phenols provides gloss and ratio
The more preferable surface smoothnesses of main AO of phenols.Phosphinate (salt) secondary AO has increase HDT and significant reduction is in rotational moulding process
In PIAT (peak internal air temperature) protrusion effect.The content of HALS and nucleator has slightly for circulation time
Negative effect, but do not recommend the HALS of too high amount for food grade products.
Claims (7)
1. the method for powdery polymer composition is used to prepare, including：
A. provide and include following composition
I.65 it is selected at least one polypropylene of 95 parts by weight, the polypropylene by homopolymer, anti-impact polymer, random copolymerization
The group of thing or their mixture composition, wherein the anti-impact polymer is to contain ethylene-propylene rubber as impact modifier
Polypropylene,
Ii.5 to 30 parts by weight at least one polyethylene, the polyethylene be selected from by high density polyethylene (HDPE), low density polyethylene (LDPE),
The group of linear low density polyethylene, the copolymer of ethylene-propylene or their mixture composition, and
Iii.0.0005 to 7 parts by weight at least one additive, and
B. at a temperature of at least 0 DEG C, preferably 10-30 DEG C, the composition of pulverising step a).
2. according to the method described in claim 1, wherein, the composition further include 0.005 to 0.5, preferably 0.1 to
The thermoplastic polyester elastomer of 0.3 parts by weight.
3. method according to claim 1 or 2, wherein, at least one additive includes
A) at least one hindered phenolic antioxidants of 0.0005-10 parts by weight or non-phenol antioxidant, azanol or they
Mixture,
B) processing additives with the molecular weight less than 10.000g/ moles of 0.0005 to 1 parts by weight, the processing addition
Agent is the antioxidant based on phosphorus, preferably phosphite ester, alkyl phosphite, aryl phosphite, be obstructed aryl phosphite
Deng；
C) UV stabilizer of 0.002 to 2 parts by weight, it is steady selected from the hindered amine light by the molecular weight with 800 to 1.500g/ moles
Determine the group of agent (HALS) composition,
D) thermoplastic polyester elastomer of 0.002 to 2 parts by weight；And
E) nucleator of 0 to 0.5 parts by weight.
4. according to any method of the preceding claims, wherein, the polyacrylic amount is excellent in 70 to 90 parts by weight
In the range of the parts by weight of selection of land 75 to 90.
5. according to any method of the preceding claims, wherein, the amount of the polyethylene is excellent in 10 to 30 parts by weight
In the range of the parts by weight of selection of land 20 to 30.
6. according to any method of the preceding claims, wherein, crushing is the crushing by means of non-frozen system.
7. according to any method of the preceding claims, further comprise the rotational moulding after step b the step of.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15185261.3 | 2015-09-15 | ||
| EP15185261 | 2015-09-15 | ||
| EP15185465.0 | 2015-09-16 | ||
| EP15185465.0A EP3144348B1 (en) | 2015-09-16 | 2015-09-16 | Non-cryogenic grindable polypropylene based compounds for rotomolding applications |
| PCT/EP2016/071389 WO2017046018A1 (en) | 2015-09-15 | 2016-09-12 | Non-cryogenic grindable polypropylene based compounds for rotomolding applications |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108026342A true CN108026342A (en) | 2018-05-11 |
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ID=56920708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680053054.1A Pending CN108026342A (en) | 2015-09-15 | 2016-09-12 | For rotational moulding application can non-frozen grinding based on polyacrylic compound |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108026342A (en) |
| WO (1) | WO2017046018A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112300497A (en) * | 2020-10-29 | 2021-02-02 | 中国石油化工股份有限公司 | Low-foam polypropylene composition for rotational molding process and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101490165A (en) * | 2006-07-17 | 2009-07-22 | 保瑞利斯科技公司 | Use of polypropylene composition |
| CN102725345A (en) * | 2009-09-18 | 2012-10-10 | 陶氏环球技术有限责任公司 | Powdered thermoplastic polyolefin elastomer composition for slush molding processes |
| CN103739946A (en) * | 2013-12-07 | 2014-04-23 | 天津市华鑫达投资有限公司 | High-impact high-stiffness polypropylene rotational molding material and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US73325A (en) | 1868-01-14 | John w | ||
| EP1236770B1 (en) * | 2001-03-01 | 2006-06-07 | Borealis Technology Oy | Polyethylene compositions for rotomolding |
| IN2014CN04431A (en) | 2011-12-20 | 2015-09-04 | Dow Global Technologies Llc | |
| KR102519282B1 (en) * | 2013-10-15 | 2023-04-10 | 다우 글로벌 테크놀로지스 엘엘씨 | Compatibilized polyolefin blends |
-
2016
- 2016-09-12 CN CN201680053054.1A patent/CN108026342A/en active Pending
- 2016-09-12 WO PCT/EP2016/071389 patent/WO2017046018A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101490165A (en) * | 2006-07-17 | 2009-07-22 | 保瑞利斯科技公司 | Use of polypropylene composition |
| CN102725345A (en) * | 2009-09-18 | 2012-10-10 | 陶氏环球技术有限责任公司 | Powdered thermoplastic polyolefin elastomer composition for slush molding processes |
| CN103739946A (en) * | 2013-12-07 | 2014-04-23 | 天津市华鑫达投资有限公司 | High-impact high-stiffness polypropylene rotational molding material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112300497A (en) * | 2020-10-29 | 2021-02-02 | 中国石油化工股份有限公司 | Low-foam polypropylene composition for rotational molding process and preparation method thereof |
| CN112300497B (en) * | 2020-10-29 | 2023-04-07 | 中国石油化工股份有限公司 | Low-foam polypropylene composition for rotational molding process and preparation method thereof |
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| Publication number | Publication date |
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| WO2017046018A1 (en) | 2017-03-23 |
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Application publication date: 20180511 |