CN105566751A - High-crystallinity polypropylene foaming master batch and preparation method thereof - Google Patents
High-crystallinity polypropylene foaming master batch and preparation method thereof Download PDFInfo
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Abstract
The invention discloses high-crystallinity polypropylene foaming master batch and a preparation method thereof. The preparation method comprises the following steps: taking LDPE as matrix resin; adding a chemical foaming agent, a nucleating agent 1, a nucleating agent 2, a lubricating agent, a surfactant and the like into a high-speed mixer for uniform mixing; putting the obtained uniform mixture into a double-screw extruder for extrusion palletization, so as to obtain the high-crystallinity polypropylene foaming master batch. The high-crystallinity polypropylene foaming master batch can be used for forming during polypropylene injection molding, and extraction of foamed plates, foamed profiles and foamed pipes; the foaming rate of a foamed product is high; the size of foam holes is small; the density of the foam holes is low; the appearance defect of the product as well as the mechanical property reduction is low.
Description
Technical field
The present invention relates to polypropylene expanded master batch of a kind of high crystalline and preparation method thereof, belong to polymeric material field.
Background technology
Injection foaming can reduce the weight of goods, reduces the use of resin material, reduces production cost, has very important significance.But high crystalline PP is in injection foaming process, obviously, surperficial gas trace is serious, degradation problem under glossiness to deposit mechanical properties decrease after expanding, seriously constrains this technological industrialization and promotes and application.
Current solution is the improvement by chemical foaming agent prescription, the size of refinement and homogenize abscess and distribution as far as possible, effectively reduce the mechanical properties decrease because chemical foaming brings, but the refinement of abscess and homogenize limit to some extent, arrive and be to a certain degree difficult to afterwards continue to change.From current state of the art, abscess-size is enough little, and distribution of cells is enough even, but the mechanical properties decrease brought, be still the subject matter that producer is worried.
Therefore, we are under the prerequisite first ensureing abscess-size and distribution, improve the mechanical property in non-foamed region in injection foaming process, under measure so both ways, significantly reduce the mechanical properties decrease because chemical foaming brings.
Summary of the invention
The present invention is directed to the defect of the mechanical properties decrease that high crystalline polypropylene PP in prior art brings due to chemical foaming in injection foaming process, propose a kind of high crystalline expandable polypropylene resin master batch and preparation method thereof, under the prerequisite ensureing abscess-size and distribution, improve the mechanical property in non-foamed region simultaneously.
For achieving the above object, the present invention adopts following technical proposals to be achieved: the polypropylene expanded master batch of a kind of high crystalline of the present invention, comprises the component of following weight part:
The polypropylene expanded master batch of high crystalline of the present invention also comprises the brightening agent of 0.1-10 weight part, and described brightening agent is selected from the mixture of one or more of the amino modified polydimethylsiloxane of non-reactive, response type amino silicone, modified polyethylene wax, polar-modified ethylene bis stearamide.
Wherein said whipping agent is selected from one or several mixture of volatile salt, bicarbonate of ammonia, sodium bicarbonate, citric acid, sodium borohydride, Cellmic C 121, Diisopropyl azodicarboxylate, dinitrosopentamethlyene tetramine, 4,4-oxos two benzene sulphur hydrazine, tolysulfonyl amido urea, hydrazo-dicarbonamide or trihydrazinotriazine.
Wherein said nucleator 1 is selected from the mixture of one or more of calcium carbonate, talcum powder, calcium oxide, silicon-dioxide, carbon black or mica.
Wherein said nucleator 2 is selected from the mixture of one or more of rosin based, organic phosphate, dibenzal sorbitol class, beta nucleater, and described beta nucleater comprises condensed ring class, two component class, aromatic amine or rare earth class nucleator.
Wherein said lubricant is selected from the mixture of one or more of EBS, paraffin, polyethylene wax, calcium stearate, Magnesium Stearate, Zinic stearas, macromolecule wax or silicone oil.
Wherein said tensio-active agent is: the mixture of one or more of sodium lauryl sulphate, stearic acid or Sodium dodecylbenzene sulfonate.
Other wherein said auxiliary agents are one or both the mixture of four (3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol esters or three [2.4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of a kind of high crystalline of the present invention is mixed by proportioning each component; The material mixed is sent in twin screw extruder and carries out granulation.
Wherein said the step that each component mixes by proportioning to be specially: add materials in mixer; Drive described mixer to rotate, to drive described mixing of materials, described mixing time is 3-7min, and rotating speed is 400-600r/min, keeps temperature of charge to be 30-40 DEG C in rotary course.
Compared with prior art, advantage of the present invention and positively effect are: the present invention can ensure that abscess-size is enough little, on the basis of the enough uniform whipping agent of distribution of cells adopting in existing technique, the agent of PP efficient nucleation is with the addition of in formula, be combined by nucleator 1 and nucleator 2, in injection foaming process, the mechanical property in non-foamed region can be improved.
Also added brightening agent in formula of the present invention, can Intermolecular Forces be reduced, improve the consistency between resin and chemical foaming agent component, be easy to form homogeneous system, reduce the decline of glossiness, reduce the formation of aberration, improve products surface quality.
Embodiment
The polypropylene expanded master batch of a kind of high crystalline of the present invention, comprises the component of following weight part:
Preferably, also comprise the brightening agent of 0.1-10 weight part in component, described brightening agent is selected from the mixture of one or more of the amino modified polydimethylsiloxane of non-reactive, response type amino silicone, modified polyethylene wax, polar-modified ethylene bis stearamide.Described brightening agent has the mobility of superelevation, lower fusing point, higher bright property, in product molding process, is easy to the gas trace of filling bubbles burst generation, reduces the decline of glossiness, reduce the formation of aberration, improve products surface quality.Brightening agent can also reduce Intermolecular Forces, improve the intermiscibility between resin and chemical foaming agent component, be easy to form homogeneous system, be conducive to the dispersion of gas, nucleator and nucleation focus, with nucleator, there is the effect of synergy, be easy to form even and tiny abscess, improve the mechanical property of goods, effectively reduce the mechanical properties decrease because chemical foaming brings.
Wherein said matrix resin is Low Density Polyethylene (LDPE).
Wherein said whipping agent is selected from one or several mixture of volatile salt, bicarbonate of ammonia, sodium bicarbonate, citric acid, sodium borohydride, Cellmic C 121, Diisopropyl azodicarboxylate, dinitrosopentamethlyene tetramine, 4,4-oxos two benzene sulphur hydrazine, tolysulfonyl amido urea, hydrazo-dicarbonamide or trihydrazinotriazine.
Wherein said nucleator 1 is selected from the mixture of one or more of calcium carbonate, talcum powder, calcium oxide, silicon-dioxide, carbon black or mica.
Wherein said nucleator 2 is selected from the mixture of one or more of rosin based, organic phosphate, dibenzal sorbitol class, beta nucleater, and described beta nucleater comprises condensed ring class, two component class, aromatic amine or rare earth class nucleator.
Wherein said lubricant is selected from the mixture of one or more of EBS (ethylene bis stearamide), paraffin, polyethylene wax, calcium stearate, Magnesium Stearate, Zinic stearas, macromolecule wax or silicone oil.
Wherein said tensio-active agent is: the mixture of one or more of sodium lauryl sulphate, stearic acid or Sodium dodecylbenzene sulfonate.
Other wherein said auxiliary agents are one or both the mixture of four (3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol esters or three [2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of a kind of high crystalline of the present invention is by mixing of materials; The material mixed is sent in twin screw extruder and carries out granulation.
Concrete, mixer can be utilized to carry out batch mixing.The described step by mixing of materials is specially: add materials in mixer; Described mixer is driven to rotate, to drive described mixing of materials.
Preferably, mixing time is 3-7min, and mixer rotating speed is 400-600r/min.Preferably, in batch mixing process, temperature of charge is kept to be 30-40 DEG C.
Preferably, mixing time is 5min, and rotating speed is 500r/min.Preferably, temperature is 35 DEG C.
Concrete, adopt spiral circulation stirring means, each component is mixed more even; Strict control mixing temperature, rotating speed and time, by the method for physical blending frictional heat, improve surface temperature between different components, make pulverulent filler uniform fold in different components surface.
Raw material after mixing enters twin screw extruder extruding pelletization by automatical feeding system, mainly through Solid Conveying and Melting, fusion plastification, shear-mixed, metering four-stage.Solid conveying section adopts wide screw thread, strengthens mass transport; Under the prerequisite of fusion plastification section strict guarantee temperature, adopt the combination of fine pitch screw thread and 45 °, 60 ° gear blocks, each component is plastified abundant, even; Shear-mixed section adopts the combination of gear block and reverse thread, strengthens the use of 60 °, 90 ° gear blocks and reverse thread, ensures that shear-mixed is even, makes full use of the degassing function between gear block simultaneously; Metering zone ensures accurate-metering; In addition, steep-pitch thread element to be adopted in exhaust ports, ensure the moisture of material in discharge extrusion, moisture, the air carried secretly and monomer and low molecular weight volatile thing; 9 heating warm areas of twin screw extruder are set as 105 degree, 110 degree, 115 degree, 120 degree, 125 degree, 130 degree, 135 degree, 130 degree, 120 degree successively, head temperature 130 degree, the setting of temperature will ensure the abundant melting of material, the cooling of forcing machine adopts the mode of water-cooled, prevent temperature of charge in charging basket too high, cause the decomposition of material, affect the quality of master batch; Main frame frequency 20-30HZ, feeding frequency 20-40HZ, ensure carrying out smoothly of production efficiency and process for processing.
The polypropylene expanded master batch of the high crystalline that the present invention relates to can be used for polypropylene injection foaming, extruding of foaming plate, foamed profile and foam pipe, foamed products foaming ratio is high, abscess-size is little, cell density is little, products appearance defect is little, and mechanical properties decrease is little, opens a new route for polypropylene expanded.
In order to make object of the present invention, technical scheme and advantage clearly understand, below with reference to embodiment and comparative example, the present invention is described in further detail.
Embodiment 1
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 40kg Cellmic C 121,2kg talcum powder, 2kg calcium carbonate, 500g dibenzal sorbitol class nucleator, 500g aromatic amine beta nucleater, 500gEBS, 1kg Zinic stearas, 500g sodium lauryl sulphate, 250g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester, 250g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is: above-mentioned material is mixed 5min in high speed mixer, and mixing temperature is 35 DEG C, and rotating speed is 500r/min.Extrude in twin screw extruder after discharging and obtain polypropylene expanded master batch, 9 heating warm areas of twin screw extruder are set as 105 DEG C, 110 DEG C, 115 DEG C, 120 DEG C, 125 DEG C, 130 DEG C, 135 DEG C, 130 DEG C, 120 DEG C successively, head temperature is 130 DEG C, main frame frequency is 20-30Hz, and feeding frequency is 20-40Hz.
Embodiment 2
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 40kg Diisopropyl azodicarboxylate, 2kg talcum powder, 2kg silicon-dioxide, 500g nucleator in organic phosphate class, 500g rare earth class beta nucleater, 500g paraffin, 1kg Zinic stearas, 500g sodium lauryl sulphate, 500g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 3
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 10kg sodium bicarbonate, 20kg Cellmic C 121,2kg talcum powder, 2kg mica, 500g rosin based nucleator, 500g two component class beta nucleater, 500g calcium stearate, 500g stearic acid, 500g sodium lauryl sulphate, 500g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 4
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 40kg4,4-oxo two benzene sulphur hydrazine, 2kg calcium carbonate, 2kg mica, 500g dibenzal sorbitol class nucleator, 500g rare earth class nucleator, 500g paraffin, 500g stearic acid, 500g Sodium dodecylbenzene sulfonate, 500g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 5
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 40kg tolysulfonyl amido urea, 2kg talcum powder, 2kg calcium oxide, 500g aromatic amine nucleator, 500g condensed ring class beta nucleater, 500g silicone oil, 500g sodium lauryl sulphate, 500g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester, 500g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 6
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 15kg bicarbonate of ammonia, 15kg Trisodium Citrate, 2kg calcium carbonate, 2kg silicon-dioxide, 250g nucleator in organic phosphate class, 250g dibenzal sorbitol class nucleator, 250g aromatic amine beta nucleater, 250g rare earth class beta nucleater, 500g paraffin, 500g silicone oil, 250g sodium lauryl sulphate, 250g Sodium dodecylbenzene sulfonate, 500g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester, 500g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 7
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 40kg Cellmic C 121,2kg talcum powder, 2kg calcium carbonate, 500g dibenzal sorbitol class nucleator, 500g aromatic amine beta nucleater, 500gEBS, 1kg Zinic stearas, 500g sodium lauryl sulphate, 250g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester, 250g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 8
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 10kg Cellmic C 121,500g talcum powder, 500g calcium carbonate, 50g dibenzal sorbitol class nucleator, 50g aromatic amine beta nucleater, 50gEBS, 50g Zinic stearas, 100g sodium lauryl sulphate, 50g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester, 50g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 9
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 10kg Diisopropyl azodicarboxylate, 500g talcum powder, 500g silicon-dioxide, 500g nucleator in organic phosphate class, 500g rare earth class beta nucleater, 50g paraffin, 50g Zinic stearas, 100g sodium lauryl sulphate, 100g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 10
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 5kg bicarbonate of ammonia, 5kg citric acid, 500g calcium carbonate, 500g silicon-dioxide, 250g nucleator in organic phosphate class, 250g dibenzal sorbitol class nucleator, 250g aromatic amine beta nucleater, 250g rare earth class beta nucleater, 500g paraffin, 500g silicone oil, 250g sodium lauryl sulphate, 250g Sodium dodecylbenzene sulfonate, 500g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester, 500g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 11
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 10kg sodium bicarbonate, 10kg Cellmic C 121,5kg talcum powder, 5kg mica, 1kg rosin based nucleator, 1kg two component class beta nucleater, 500g calcium stearate, 500g Zinic stearas, 1kg sodium lauryl sulphate, 1kg tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 12
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 40kg4,4-oxo two benzene sulphur hydrazine, 8kg calcium carbonate, 8kg mica, 5kg dibenzal sorbitol class nucleator, 5kg rare earth class nucleator, 500g paraffin, 500g stearic acid, 500g Sodium dodecylbenzene sulfonate, 500g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 13
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 200kg tolysulfonyl amido urea, 25kg talcum powder, 25kg calcium oxide, 10kg aromatic amine nucleator, 10kg condensed ring class beta nucleater, 5kg silicone oil, 5kg sodium lauryl sulphate, 1kg tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester, 1kg tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 14
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 50kg sodium bicarbonate, 50kg Cellmic C 121,10kg talcum powder, 10kg mica, 2.5kg rosin based nucleator, 2.5kg two component class beta nucleater, 500g calcium stearate, 500g Zinic stearas, 1kg sodium lauryl sulphate, 1kg tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 15
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 100kg bicarbonate of ammonia, 100kg citric acid, 5kg calcium carbonate, 5kg silicon-dioxide, 5kg nucleator in organic phosphate class, 5kg dibenzal sorbitol class nucleator, 5kg aromatic amine beta nucleater, 5kg rare earth class beta nucleater, 2kg paraffin, 2kg silicone oil, 2kg sodium lauryl sulphate, 2kg Sodium dodecylbenzene sulfonate, 1kg tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester, 1kg tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 16
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 200kg tolysulfonyl amido urea, 25kg talcum powder, 25kg calcium oxide, 10kg aromatic amine nucleator, 10kg condensed ring class beta nucleater, 5kg silicone oil, 5kg sodium lauryl sulphate, 1kg tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester, 1kg tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 17
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 40kg Cellmic C 121,2kg talcum powder, 2kg calcium carbonate, 500g dibenzal sorbitol class nucleator, 500g aromatic amine beta nucleater, the amino modified polydimethylsiloxane of 1kgA-408 non-reactive, 500gEBS, 1kg Zinic stearas, 500g sodium lauryl sulphate, 250g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester, 250g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 18
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 40kg Diisopropyl azodicarboxylate, 2kg talcum powder, 2kg silicon-dioxide, 500g nucleator in organic phosphate class, 500g rare earth class beta nucleater, the polar-modified ethylene bis stearamide of 1kg363,500g paraffin, 1kg Zinic stearas, 500g sodium lauryl sulphate, 500g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 19
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 10kg sodium bicarbonate, 20kg Cellmic C 121,2kg talcum powder, 2kg mica, 500g rosin based nucleator, 500g two component class beta nucleater, 1kgH2805 modified polyethylene wax, 500g calcium stearate, 500g stearic acid, 500g sodium lauryl sulphate, 500g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 20
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 40kg4,4-oxo two benzene sulphur hydrazine, 2kg calcium carbonate, 2kg mica, 500g dibenzal sorbitol class nucleator, 500g rare earth class nucleator, 1kgYY-503 response type amino silicone, 500g paraffin, 500g stearic acid, 500g Sodium dodecylbenzene sulfonate, 500g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 21
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 40kg tolysulfonyl amido urea, 2kg talcum powder, 2kg calcium oxide, 500g aromatic amine nucleator, 500g condensed ring class beta nucleater, the amino modified polydimethylsiloxane of 1kgA408 non-reactive, 500g silicone oil, 500g sodium lauryl sulphate, 500g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester, 500g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Embodiment 22
Component and the weight part of the polypropylene expanded master batch of described high crystalline are: 100kgLDPE, 15kg bicarbonate of ammonia, 15kg Trisodium Citrate, 2kg calcium carbonate, 2kg silicon-dioxide, 250g nucleator in organic phosphate class, 250g dibenzal sorbitol class nucleator, 250g aromatic amine beta nucleater, 250g rare earth class beta nucleater, the amino modified polydimethylsiloxane of 1kgA409 non-reactive, 500g paraffin, 500g silicone oil, 250g sodium lauryl sulphate, 250g Sodium dodecylbenzene sulfonate, 500g tetra-(3, 5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester, 500g tri-[2, 4-di-tert-butyl-phenyl] phosphorous acid ester.
The preparation method of the polypropylene expanded master batch of described high crystalline is with embodiment 1.
Comparative example 1
Component and the weight part of described polypropylene expanded master batch are: 100kgLDPE, 40kg Cellmic C 121,2kg talcum powder, 2kg calcium carbonate, 500gEBS, 1kg Zinic stearas, 500g sodium lauryl sulphate, 250g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester, 250g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.Compared with embodiment 1, in comparative example 1, do not add nucleator 2, compared with embodiment 17, in comparative example 1, do not add nucleator 2 and brightening agent.
The preparation method of described polypropylene expanded master batch is with embodiment 1.
Comparative example 2
Component and the weight part of described polypropylene expanded master batch are: the amino modified polydimethylsiloxane of 100kgLDPE, 40kg Cellmic C 121,2kg talcum powder, 2kg calcium carbonate, 1kgA-408 non-reactive, 500gEBS, 1kg stearic acid, 500g sodium lauryl sulphate, 250g tetra-(3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol ester, 250g tri-[2,4-di-tert-butyl-phenyl] phosphorous acid ester.Compared with embodiment 1, in comparative example 2, add brightening agent; Compared with embodiment 17, in comparative example 2, do not add nucleator 2.
The preparation method of described polypropylene expanded master batch is with embodiment 1.
Comparative example 3
Ke Laien whipping agent 2016C is adopted to carry out injection moulding.
The polypropylene expanded master batch performance obtained to above-described embodiment 1-22 and comparative example 1-3 and chemical foaming injecting products carry out performance test.Brightening agent is not added in the component of wherein said embodiment 1-16, brightening agent is added in the component of embodiment 17-22, nucleator 2 and brightening agent is not added in described comparative example 1, add brightening agent in comparative example 2 and do not add nucleator 2, comparative example 3 carries out injection moulding with Ke Laien whipping agent 2016C of the prior art.
The polypropylene expanded master batch performance of table 1 embodiment 1-16 and chemical foaming injecting products appearance property, mechanical property and shaping cycle data
The polypropylene expanded master batch performance of table 2 embodiment 17-22 and chemical foaming injecting products appearance property, mechanical property and shaping cycle data
From the data in table 1, polypropylene expanded master batch goods indices (as gas forming amount, ash content, pH value, decomposition temperature) normal table prepared by the present invention, utilize the polypropylene expanded master batch of self-control to carry out chemical foaming injection moulding experiment, the stable performance of gained injecting products is excellent.
From the data in table 2, polypropylene expanded master batch goods indices (as gas forming amount, ash content, pH value, decomposition temperature) normal table prepared by the present invention, utilize the polypropylene expanded master batch of self-control to carry out chemical foaming injection moulding experiment, the stable performance of gained injecting products is excellent.
Known by the Data Comparison of table 1 and table 2, table 2 is owing to the addition of brightening agent, and appearance is better, and simultaneously due to brightening agent and the complex role of nucleator 2, every mechanical property is all than table 1 excellence.
The polypropylene expanded master batch performance of table 2 comparative example 1-3 and chemical foaming injecting products appearance property, mechanical property and shaping cycle data
Contrasted by embodiment 17 and comparative example 1, carry out contrast from embodiment 17 and comparative example 2, owing to not adding nucleator 2 in comparative example 1 and comparative example 2, in comparative example, mechanical property and shaping cycle are all not as embodiment 17 simultaneously.The interpolation of efficient PP nucleator is described, PP crystallisation process under Shooting Technique condition can be changed, refinement PP crystal grain, the crystal grain form regular shape, number is many, size is little, being evenly distributed, improve the mechanical property of goods, accelerate PP crystallization velocity simultaneously, effectively reduce shaping cycle.
Contrast is carried out from embodiment 1-16 and embodiment 17-22, owing to adding brightening agent in the component of embodiment 17-22, therefore embodiment 17-22 appearance is better, glossiness is better, the appearance of embodiment 1-16 is poor, this is mainly because the brightening agent of small molecules chain has the mobility of superelevation, lower fusing point, higher bright property, in product molding process, be easy to the gas trace of filling bubbles burst generation, reduce the decline of glossiness, reduce the formation of aberration, improve products surface quality.In addition, owing to adding brightening agent in embodiment 17-22, therefore to compare the mechanical property of embodiment 1-16 better for embodiment 17-22, mainly because brightening agent can reduce Intermolecular Forces, improve the intermiscibility between resin and chemical foaming agent component, be easy to form homogeneous system, be conducive to the dispersion of gas, nucleator and nucleation focus, be easy to form even and tiny abscess, improve the mechanical property of goods, effectively reduce the mechanical properties decrease because chemical foaming brings.Therefore brightening agent is added and nucleator 2 has synergistic function, more excellent than the mechanical property be used alone.
Carry out contrast from embodiment 17 and comparative example 3, owing to adding brightening agent and nucleator 2 in embodiment 17, every appearance property, mechanical property and shaping cycle are all excellent than use Ke Laien whipping agent 2016C.Ke Laien whipping agent 2016C represents blowing agent level of the prior art, enough little abscess-size can be realized, enough uniform distribution of cells, and the present invention is under the prerequisite ensureing abscess-size and distribution of cells, improves the mechanical property of foam material further.
By the comparison of above-described embodiment 1-22 and comparative example 1-3 mechanical property, apparent condition, shaping cycle, the polypropylene expanded master batch of the high crystalline that we prepare, in foamed forming process, due to adding of efficient PP nucleator and brightening agent, abscess-size even compact, product surface glossiness rises, aberration reducing tendency is obvious, the mechanical properties decrease trend caused due to chemical foaming reduces, and due to the raising of Tc and crystallization velocity, shaping cycle declines obviously.
Above embodiment only in order to technical scheme of the present invention to be described, but not is limited; Although with reference to previous embodiment to invention has been detailed description, for the person of ordinary skill of the art, still can modify to the technical scheme described in previous embodiment, or equivalent replacement is carried out to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of the present invention's technical scheme required for protection.
Claims (10)
1. the polypropylene expanded master batch of high crystalline, is characterized in that: the component comprising following weight part:
Matrix resin LDPE100 part,
Whipping agent 10-200 part,
Nucleator 11-50 part,
Nucleator 20.1-20 part,
Lubricant 0.1-5 part,
Tensio-active agent 0.1-5 part,
Other auxiliary agents 0.1-2 part.
2. according to the polypropylene expanded master batch of a kind of high crystalline described in claim 1, it is characterized in that: the brightening agent also comprising 0.1-10 weight part, described brightening agent is selected from the mixture of one or more of the amino modified polydimethylsiloxane of non-reactive, response type amino silicone, modified polyethylene wax, polar-modified ethylene bis stearamide.
3. the polypropylene expanded master batch of a kind of high crystalline according to claim 1, it is characterized in that: described whipping agent is selected from one or several mixture of volatile salt, bicarbonate of ammonia, sodium bicarbonate, citric acid, sodium borohydride, Cellmic C 121, Diisopropyl azodicarboxylate, dinitrosopentamethlyene tetramine, 4,4-oxos two benzene sulphur hydrazine, tolysulfonyl amido urea, hydrazo-dicarbonamide or trihydrazinotriazine.
4. the polypropylene expanded master batch of a kind of high crystalline according to claim 1, is characterized in that: described nucleator 1 is selected from the mixture of one or more of calcium carbonate, talcum powder, calcium oxide, silicon-dioxide, carbon black or mica.
5. the polypropylene expanded master batch of a kind of high crystalline according to claim 1, it is characterized in that: described nucleator 2 is selected from the mixture of one or more of rosin based, organic phosphate, dibenzal sorbitol class, beta nucleater, described beta nucleater is condensed ring class, two component class, aromatic amine or rare earth class nucleator.
6. the polypropylene expanded master batch of a kind of high crystalline according to claim 1, is characterized in that: described lubricant is selected from the mixture of one or more of EBS, paraffin, polyethylene wax, calcium stearate, Magnesium Stearate, Zinic stearas, macromolecule wax or silicone oil.
7., according to the polypropylene expanded master batch of a kind of high crystalline described in claim 1, it is characterized in that: described tensio-active agent is selected from the mixture of one or more of sodium lauryl sulphate, stearic acid or Sodium dodecylbenzene sulfonate.
8. according to the polypropylene expanded master batch of a kind of high crystalline described in claim 1, it is characterized in that: other described auxiliary agents are one or both the mixture of four (3,5-di-t-butyl-4-hydroxyl) phenylpropionic acid pentaerythritol esters or three [2.4-di-tert-butyl-phenyl] phosphorous acid ester.
9. the preparation method of the polypropylene expanded master batch of a kind of high crystalline according to any one of claim 1-8, is characterized in that:
By each component by proportioning mixing;
The material mixed is sent in twin screw extruder and carries out granulation.
10. according to the preparation method of the polypropylene expanded master batch of a kind of high crystalline described in claim 9, it is characterized in that: described the step that each component mixes by proportioning to be specially:
Add materials in mixer;
Drive described mixer to rotate, to drive described mixing of materials, described mixing time is 3-7min, and rotating speed is 400-600r/min, keeps temperature of charge to be 30-40 DEG C in rotary course.
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Effective date of registration: 20200909 Address after: No.6, Ronggui Rongqi Avenue East, Foshan City, Guangdong Province Patentee after: FOSHAN SHUNDE RONGSHENG PLASTIC Co.,Ltd. Address before: 266114 Shandong city of Qingdao province high tech Industrial Development Zone, Juxian Bridge Road No. 17 Patentee before: QINGDAO HISENSE MOULD Co.,Ltd. |