CN106700253A - Low shrink and low density PP material and preparation method thereof - Google Patents
Low shrink and low density PP material and preparation method thereof Download PDFInfo
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- CN106700253A CN106700253A CN201611153457.1A CN201611153457A CN106700253A CN 106700253 A CN106700253 A CN 106700253A CN 201611153457 A CN201611153457 A CN 201611153457A CN 106700253 A CN106700253 A CN 106700253A
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- epoxy resin
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- 239000000463 material Substances 0.000 title claims abstract description 82
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000003822 epoxy resin Substances 0.000 claims abstract description 25
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 25
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 18
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 18
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- -1 polypropylene Polymers 0.000 claims abstract description 15
- 229920006124 polyolefin elastomer Polymers 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- 229920001577 copolymer Polymers 0.000 claims description 20
- 239000004925 Acrylic resin Substances 0.000 claims description 18
- 229920000178 Acrylic resin Polymers 0.000 claims description 18
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 16
- 238000004132 cross linking Methods 0.000 claims description 15
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 12
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 12
- 239000004793 Polystyrene Substances 0.000 claims description 6
- 239000011353 cycloaliphatic epoxy resin Substances 0.000 claims description 4
- 238000005453 pelletization Methods 0.000 claims description 4
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 239000005062 Polybutadiene Substances 0.000 claims description 3
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 claims description 3
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- 238000004898 kneading Methods 0.000 claims description 3
- 239000004611 light stabiliser Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 150000002989 phenols Chemical class 0.000 claims description 3
- 150000008301 phosphite esters Chemical class 0.000 claims description 3
- 229920002857 polybutadiene Polymers 0.000 claims description 3
- WVGXBYVKFQJQGN-UHFFFAOYSA-N 1-tert-butylperoxy-2-propan-2-ylbenzene Chemical compound CC(C)C1=CC=CC=C1OOC(C)(C)C WVGXBYVKFQJQGN-UHFFFAOYSA-N 0.000 claims description 2
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 2
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 2
- 229920000638 styrene acrylonitrile Polymers 0.000 claims description 2
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 claims 2
- 150000001335 aliphatic alkanes Chemical class 0.000 claims 1
- 150000001336 alkenes Chemical class 0.000 claims 1
- 229940106691 bisphenol a Drugs 0.000 claims 1
- 239000011145 styrene acrylonitrile resin Substances 0.000 claims 1
- 239000004743 Polypropylene Substances 0.000 abstract description 48
- 229920001155 polypropylene Polymers 0.000 abstract description 13
- 238000000465 moulding Methods 0.000 abstract description 12
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 11
- 239000000956 alloy Substances 0.000 description 10
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- NOSXUFXBUISMPR-UHFFFAOYSA-N 1-tert-butylperoxyhexane Chemical compound CCCCCCOOC(C)(C)C NOSXUFXBUISMPR-UHFFFAOYSA-N 0.000 description 2
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- ODLMAHJVESYWTB-UHFFFAOYSA-N propylbenzene Chemical compound CCCC1=CC=CC=C1 ODLMAHJVESYWTB-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 1
- ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 2,3-dimethylbutane Chemical group CC(C)C(C)C ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical group C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002305 electric material Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- YARNEMCKJLFQHG-UHFFFAOYSA-N prop-1-ene;styrene Chemical compound CC=C.C=CC1=CC=CC=C1 YARNEMCKJLFQHG-UHFFFAOYSA-N 0.000 description 1
- 230000003678 scratch resistant effect Effects 0.000 description 1
- 230000003335 steric effect Effects 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- 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 invention belongs to the technical field of modified materials and discloses a low shrink and low density PP material. The material comprises the following components in parts by weight: 85-95 parts of polypropylene resin, 1-5 parts of a polyolefin elastomer, 3-8 parts of a rigid molecular chain material, 1-5 parts of epoxy resin, 0.1-0.5 part of a crosslinking agent, 0.1-0.5 part of an auxiliary crosslinking agent, 0.2-0.4 part of an antioxidant and 0.2-0.4 part of a weather resistant. The invention also discloses a preparation method of the PP material. According to the material provided by the invention, a low molding shrinkage of 0.7-0.9% can be achieved only by adding an extremely small amount of material with large steric hindrance functional rigid molecular chain sections, and meanwhile, the influence on the rigidity and toughness of the PP material is relatively slight; and the material prepared by the method is low in density (smaller than 0.93g/cm<3>), the demand of a light trend is met, and the scratch-resisting performance of the PP material is improved.
Description
Technical field
The invention belongs to material modified technical field, and in particular to a kind of low-contraction low-density PP materials and its preparation side
Method.
Background technology
PP is one of five big general-purpose plastics, and density is low, is widely used in the fields such as automobile, household electrical appliances, toy.However, PP has
The weakness of one maximum is big molding shrinkage, and this brings certain puzzlement to die sinking and molded article dimensional stability.At present
The method of the most frequently used reduction PP shrinkage factors has two kinds：One is addition is mineral-filled, with the locus benefit reduction of mineral
Material shrinkage rate.The method effect is significant, but the density of material is increased, destroy the excellent of the low-density that PP materials possess in itself
Gesture；The second is by the way of alloy, adding another macromolecular material, the structural integrity of PP materials is destroyed, reduce material knot
Crystalline substance reduces Material shrinkage rate, and it is just effective that the method needs to add larger amount of alloy compositions, can influence the machinery of PP materials
Performance.
The patent document of Publication No. CN201511018344 discloses a kind of by adding mineral filler and olefin-modified
Agent synergistic prepares a kind of proportion as little as 0.97g/cm3, shrinkage factor is 0.6 ~ 0.8% lower shrinkage low-gravity polypropylene material.It is public
The number of opening discloses a kind of shrinkage factor that PP is reduced by way of PP/ABS alloys for the patent document of CN201310432874.It is public
The number of opening is a kind of for the patent document of CN200810030391 is disclosed to be prepared molding shrinkage and is by way of PP/PS alloys
0.7 ~ 0.9% PP materials, close to the level of ABS.The patent document of Publication No. CN201210124421 discloses a kind of original position
The mode of increase-volume reactive extrursion prepares relatively low molding shrinkage PO/PS alloy materials.
However, current low-density lower shrinkage PP density generally accomplishes 0.97g/cm3More than, compared to PP resins
0.9g/cm3Density, also there is a certain distance.
The content of the invention
The purpose of the present invention is directed to the deficiencies in the prior art, there is provided a kind of PP materials, neither damages PP materials original
Low-density advantage, and the less influence PP mechanical propertys of materials, while reaching the low requirement of molding shrinkage.
It is a further object of the present invention to provide the preparation method of the PP materials.
To reach one of above-mentioned purpose, the present invention uses following technical scheme：
A kind of low-contraction low-density PP materials, according to parts by weight, including following components：
85 ~ 95 parts of acrylic resin
1 ~ 5 part of polyolefin elastomer
3 ~ 8 parts of rigid molecule chain material
1 ~ 5 part of epoxy resin
0.1 ~ 0.5 part of crosslinking agent
0.1 ~ 0.5 part of crosslinking coagent
0.2 ~ 0.4 part of antioxidant
0.2 ~ 0.4 part of weather resisting agent.
Further, the acrylic resin is selected from the mixing of the one or two kinds of in homopolymerization or COPP
Thing, the melt index under the conditions of 230 DEG C/2.16kg is 1 ~ 100g/10min.
Further, the polyolefin elastomer is selected from ethylene-butene copolymer, ethylene-octene copolymer, ethene-the third
At least one in alkene-diene copolymer；Optimal ethylene-octene copolymer, 1 ~ 15g/10min of melt index（ISO 1133,
230℃/2.16kg）, octene content is more than 25%.
Further, the rigid molecule chain material is selected from polystyrene, polymethyl methacrylate, styrene-propene
At least one in lonitrile copolymer；It is preferred that polymethyl methacrylate.
Further, the epoxy resin is selected from bisphenol A type epoxy resin, glycidyl ether type epoxy resin, organic titanium
Epoxy resin or cycloaliphatic epoxy resin；It is preferred that cycloaliphatic epoxy resin.
Further, the crosslinking agent is selected from cumyl peroxide, Isosorbide-5-Nitrae-dual-tert-butyl peroxy isopropyl base benzene, peroxidating
At least one in benzoyl, 2,5- dimethyl -2,5 two (t-butylperoxy) hexane；It is preferred that 1,4- dual-tert-butyl peroxides are different
Propylbenzene.
Further, the crosslinking coagent is selected from polybutadiene and/or trimethylolpropane trimethacrylate, molecular weight ＜
6000。
Further, the antioxidant is selected from Hinered phenols antioxidant 168 and/or phosphite ester kind antioxidant 1010.
Further, the weather resisting agent is selected from hindered amine light stabilizer UV-3808PP5.
The method that one kind prepares the low-contraction low-density PP materials described in claim 1 ~ 9 any one, specifically：By original
Material is put into batch mixer and is well mixed, and is then placed in double screw extruder extruding pelletization, and melt zone is mediated using three 90 ° of anglecs of rotation of section
Element and a small helical pitch delivery element block of section are installed, and 350 ~ 450r/min of engine speed, expressing technique temperature is 180 ~ 200
℃。
Compared with prior art, it is of the invention by adding a small amount of rigid molecule chain material, with crosslinking agent initiation grafting,
Reduce the structural integrity of PP materials and reduce the crystallization of material, the grafting booster action along with epoxy resin improves grafting
Efficiency, while the space steric effect of epoxy resin itself, makes mutually to be wound between strand, so as to reach the effect of lower shrinkage
Really.So, the present invention has following advantage：
1st, compared to PP alloy materials, although simple material blending method can also reduce the shrinkage factor of material, to reach
Relatively low shrinkage factor effect, non-PP compositions need addition number more, have a strong impact on the mechanical performance of PP materials.The present invention is only needed
The material for adding minimal amount of big steric hindrance functional group rigid molecular segments can reach 0.7 ~ 0.9% low molding shrinkage, because
This, while material reduction material molding shrinkage prepared by the present invention, the firm Toughness to PP materials is slighter.
2nd, compared to mineral-filled PP materials, on the premise of identical molding shrinkage is reached, material prepared by the present invention
Material density is low（＜ 0.93g/cm3）, meet the demand of lightweight trend, can directly substitute the mineral-filled PP materials of high density without
With more mold exchange, it is also possible to make master batch and make shrinkage factor conditioning agent for automobile/family's electric material.
3rd, by the addition of rigid particles and epoxy resin, the case hardness of material is improve, improves the resistance to of PP materials
Scratch performance.
4th, the present invention uses special process screw combinations, and melt zone is small using three 90 ° of anglec of rotation kneading members of section and a section
Helical pitch delivery element block is installed, and possesses the strong dispersibility of low-heat-generation, it is to avoid material hot-spot occurs and influences grafting.
Specific embodiment
With reference to specific embodiment, the present invention is described further.
In following examples, acrylic resin used is selected from the mixed of the one or two kinds of in homopolymerization or COPP
Compound, the melt index under the conditions of 230 DEG C/2.16kg is 1 ~ 100g/10min.Crosslinking agent used is selected from peroxidating diisopropyl
In benzene, 1,4 bis tert butyl peroxy isopropyl benzene, benzoyl peroxide, 2,5- dimethyl -2,5 two (t-butylperoxy) hexane
At least one.Crosslinking coagent used is selected from polybutadiene and/or trimethylolpropane trimethacrylate, molecular weight ＜ 6000.
Antioxidant used is selected from Hinered phenols antioxidant 168 and/or phosphite ester kind antioxidant 1010.Weather resisting agent used is selected from hindered amine
Class light stabilizer UV-3808PP5.It is purchased from commercially produced product.
Embodiment 1
A kind of low-contraction low-density polypropylene material, is made up of the raw material of following weight portion：
85 parts of acrylic resin
5 parts of ethylene-octene copolymer
8 parts of polymethyl methacrylate
2 parts of bisphenol A type epoxy resin
0.2 part of crosslinking agent
0.2 part of crosslinking coagent
0.4 part of antioxidant
0.2 part of weather resisting agent
By acrylic resin, ethylene-octene copolymer, polymethyl methacrylate, bisphenol A type epoxy resin, crosslinking agent, crosslinking
Auxiliary agent, antioxidant, weather resisting agent are put into batch mixer and are well mixed（3 minutes）, double screw extruder extruding pelletization is then placed in, melt
Duan Caiyong tri- saves 90 ° of anglec of rotation kneading members and a small helical pitch delivery element block of section is installed, and the screw combinations possess low-heat-generation
Strong dispersibility, it is to avoid material hot-spot occurs and influences grafting, 350 ~ 450r/min of engine speed, expressing technique temperature is
180~200℃.Its performance parameter is as shown in table 1.
Embodiment 2
A kind of low-contraction low-density polypropylene material, is made up of the raw material of following weight portion：
85 parts of acrylic resin
2 parts of ethylene-octene copolymer
8 parts of polymethyl methacrylate
5 parts of bisphenol A type epoxy resin
0.2 part of crosslinking agent
0.2 part of crosslinking coagent
0.4 part of antioxidant
0.2 part of weather resisting agent
Its preparation technology is with example 1, and its performance parameter is as shown in table 1.
Embodiment 3
A kind of low-contraction low-density polypropylene material, is made up of the raw material of following weight portion：
95 parts of acrylic resin
5 parts of ethylene-octene copolymer
5 parts of polymethyl methacrylate
5 parts of bisphenol A type epoxy resin
0.5 part of crosslinking agent
0.5 part of crosslinking coagent
0.4 part of antioxidant
0.2 part of weather resisting agent
Its preparation technology is with example 1, and performance parameter is as shown in table 1.
Embodiment 4
A kind of low-contraction low-density polypropylene material, is made up of the raw material of following weight portion：
87 parts of acrylic resin
1 part of ethylene-butene copolymer
3 parts of polystyrene
1 part of glycerol epoxy resin
0.1 part of crosslinking agent
0.1 part of crosslinking coagent
0.2 part of antioxidant
0.4 part of weather resisting agent
Its preparation technology is with example 1.
Embodiment 5
A kind of low-contraction low-density polypropylene material, is made up of the raw material of following weight portion：
92 parts of acrylic resin
3 parts of ethylene-propylene-diene copolymer
8 parts of SAN
2 parts of organotitanium epoxy resin
0.3 part of crosslinking agent
0.3 part of crosslinking coagent
0.3 part of antioxidant
0.3 part of weather resisting agent
Its preparation technology is with example 1.
Embodiment 6
A kind of low-contraction low-density polypropylene material, is made up of the raw material of following weight portion：
90 parts of acrylic resin
4 parts of ethylene-propylene-diene copolymer
6 parts of polystyrene
4 parts of cycloaliphatic epoxy resin
0.4 part of crosslinking agent
0.4 part of crosslinking coagent
0.3 part of antioxidant
0.3 part of weather resisting agent
Its preparation technology is with example 1.
Comparative example 1
A kind of polypropylene material, is made up of the raw material of following weight portion：
90 parts of acrylic resin
0.4 part of antioxidant
0.2 part of weather resisting agent
Its preparation technology is with example 1, and performance parameter is as shown in table 1.
Comparative example 2
A kind of polypropylene alloy material, is made up of the raw material of following weight portion：
90 parts of acrylic resin
5 parts of ethylene-octene copolymer
5 parts of polymethyl methacrylate
0.4 part of antioxidant
0.2 part of weather resisting agent
Its preparation technology is with example 1, and performance parameter is as shown in table 1.
Comparative example 3
A kind of polypropylene alloy material, is made up of the raw material of following weight portion：
85 parts of acrylic resin
5 parts of ethylene-octene copolymer
5 parts of polymethyl methacrylate
5 parts of bisphenol A type epoxy resin
0.4 part of antioxidant
0.2 part of weather resisting agent
Its preparation technology is with example 1, and performance parameter is as shown in table 1.
Comparative example 4
A kind of polypropylene alloy material, is made up of the raw material of following weight portion：
90 parts of acrylic resin
5 parts of ethylene-octene copolymer
5 parts of polymethyl methacrylate
0.5 part of crosslinking agent
0.5 part of crosslinking coagent
0.4 part of antioxidant
0.2 part of weather resisting agent
Its preparation technology is with example 1, and performance parameter is as shown in table 1.
Comparative example 5
A kind of polypropylene alloy material, is made up of the raw material of following weight portion：
85 parts of acrylic resin
5 parts of ethylene-octene copolymer
5 parts of polymethyl methacrylate
5 parts of bisphenol A type epoxy resin
0.5 part of crosslinking agent
0.5 part of crosslinking coagent
0.4 part of antioxidant
0.2 part of weather resisting agent
By acrylic resin, ethylene-octene copolymer, polymethyl methacrylate, epoxy resin, crosslinking agent, crosslinking coagent, anti-
Oxygen agent, weather resisting agent are put into batch mixer and are well mixed（3 minutes）, it is then placed in double screw extruder extruding pelletization, technique screw rod group
To close by the heat high strong dispersibility design of common PP materials, 350 ~ 450r/min of engine speed, expressing technique temperature is 180 ~
200℃.Its performance parameter is as shown in table 1.
Performance test
The above-mentioned material prepared is put into injection machine and breaks mechanics batten, colour table and shrinkage factor plate, the mould rule of shrinkage factor plate
Lattice are thickness 2.0mm, length 150mm, width 15mm, and mechanics batten and colour table Shooting Technique are 200 DEG C of temperature, injection pressure
45bar, firing rate 45mm/s, pressurize 15sec, shrinkage factor plate Shooting Technique are 200 DEG C of temperature, injection pressure 45bar, firing rate
45mm/s, pressurize 5sec.Each case presses ISO testing standards, and it is as follows that the physical property that measures, shrinkage factor, cross scrape aberration result：
The component proportion and the performance parameter of product of the various embodiments of the present invention of table 1 and comparative example
| Test event | Tensile strength（MPa） | Bending strength（MPa） | Bending modulus（MPa） | Impact strength（MPa） | Density（g/cm3） | Shrinkage factor（%） | Aberration △ L |
| Embodiment 1 | 24.5 | 27.3 | 1209 | 10.7 | 0.92 | 0.77 | 0.9 |
| Embodiment 2 | 24.8 | 27.6 | 1315 | 9.1 | 0.92 | 0.78 | 1.0 |
| Embodiment 3 | 24.9 | 28.1 | 1377 | 9.6 | 0.92 | 0.73 | 0.8 |
| Embodiment 4 | 25.3 | 30.3 | 1336 | 7.8 | 0.91 | 0.94 | 1.6 |
| Embodiment 5 | 24.8 | 29.1 | 1304 | 8.7 | 0.92 | 0.75 | 0.9 |
| Embodiment 6 | 24.9 | 28.8 | 1331 | 9.1 | 0.92 | 0.73 | 0.8 |
| Comparative example 1 | 25.1 | 29.7 | 1280 | 9.7 | 0.90 | 1.58 | 3.1 |
| Comparative example 2 | 24.4 | 26.7 | 1213 | 5.2 | 0.91 | 1.35 | 2.6 |
| Comparative example 3 | 24.8 | 27.4 | 1250 | 4.3 | 0.92 | 1.21 | 1.7 |
| Comparative example 4 | 24.3 | 26.9 | 1203 | 9.2 | 0.91 | 1.07 | 1.0 |
| Comparative example 5 | 24.8 | 27.9 | 1403 | 8.2 | 0.92 | 0.85 | 0.8 |
Can be drawn by table 1：
1st, by comparative example 2, comparative example 3, embodiment 1 ~ 6 as can be seen that being blended compared to General Physics, the mode of chemical graft
The molding shrinkage of material is significantly reduced, the molding shrinkage for especially having the synergistic effect of epoxy resin, material has
It is obvious to reduce.
2nd, can be drawn by comparative example 1 ~ 4, embodiment 1 ~ 6, by chemical graft rigid particles synergistic epoxy resin
Material prepared by method had both possessed that molding shrinkage is low, but also with the low-density close to PP materials, while to the physical property of PP materials
Influence is little.After introducing Grafted rigid particle, the scratch resistant performance of material is obviously improved.
3rd, can be drawn by comparative example 5 and embodiment 1 ~ 6, the design of new screw group technology improves the grafting of material
Efficiency, improves the compatibility of material, while reducing material molding shrinkage, improves the impact property of material.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Belong to those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. a kind of low-contraction low-density PP materials, it is characterised in that according to parts by weight, including following components：
85 ~ 95 parts of acrylic resin
1 ~ 5 part of polyolefin elastomer
3 ~ 8 parts of rigid molecule chain material
1 ~ 5 part of epoxy resin
0.1 ~ 0.5 part of crosslinking agent
0.1 ~ 0.5 part of crosslinking coagent
0.2 ~ 0.4 part of antioxidant
0.2 ~ 0.4 part of weather resisting agent.
2. low-contraction low-density PP materials according to claim 1, it is characterised in that the acrylic resin is selected from homopolymerization
Or the mixture of the one or two kinds of in COPP, melt index under the conditions of 230 DEG C/2.16kg for 1 ~
100g/10min。
3. low-contraction low-density PP materials according to claim 1, it is characterised in that the polyolefin elastomer is selected from second
At least one in alkene-butylene copolymer, ethylene-octene copolymer, ethylene-propylene-diene copolymer.
4. low-contraction low-density PP materials according to claim 1, it is characterised in that the rigid molecule chain material is selected from
At least one in polystyrene, polymethyl methacrylate, SAN.
5. low-contraction low-density PP materials according to claim 1, it is characterised in that the epoxy resin is selected from bisphenol-A
Type epoxy resin, glycidyl ether type epoxy resin, organotitanium epoxy resin or cycloaliphatic epoxy resin.
6. low-contraction low-density PP materials according to claim 1, it is characterised in that the crosslinking agent is selected from peroxidating two
Isopropylbenzene, 1,4 bis tert butyl peroxy isopropyl benzene, benzoyl peroxide, 2,5- dimethyl -2,5 two (t-butylperoxy) oneself
At least one in alkane.
7. low-contraction low-density PP materials according to claim 1, it is characterised in that the crosslinking coagent is selected from polybutadiene
Alkene and/or trimethylolpropane trimethacrylate, molecular weight ＜ 6000.
8. low-contraction low-density PP materials according to claim 1, it is characterised in that the antioxidant is selected from Hinered phenols
Irgasfos 168 and/or phosphite ester kind antioxidant 1010.
9. low-contraction low-density PP materials according to claim 1, it is characterised in that the weather resisting agent is selected from hindered amines
Light stabilizer UV-3808PP5.
10. the method that one kind prepares the low-contraction low-density PP materials described in claim 1 ~ 9 any one, it is characterised in that
Raw material is put into batch mixer to be well mixed, double screw extruder extruding pelletization is then placed in, melt zone is using three 90 ° of anglecs of rotation of section
Kneading member and a small helical pitch delivery element block of section are installed, 350 ~ 450r/min of engine speed, and expressing technique temperature is 180 ~
200℃。
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| CN106700253B (en) | 2019-03-01 |
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