CN104774416A - Foamable resin particles and method for preparing foaming material by using foamable resin particles - Google Patents
Foamable resin particles and method for preparing foaming material by using foamable resin particles Download PDFInfo
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- CN104774416A CN104774416A CN201510158364.7A CN201510158364A CN104774416A CN 104774416 A CN104774416 A CN 104774416A CN 201510158364 A CN201510158364 A CN 201510158364A CN 104774416 A CN104774416 A CN 104774416A
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Abstract
The invention provides foamable resin particles. The foamable resin particles comprise a methyl methacrylate-butadiene-styrene copolymer and a foaming agent. The invention also provides a foamable composition, and the foamable composition comprises polycarbonate (PC) and the foamable resin particles. The invention also provides a foaming material prepared from the foamable composition and a method for preparing the foaming material.
Description
Technical field
The present invention relates to a kind of expandable resin particle, and prepare the method for foam material with this expandable resin particle.
Background technology
Polycarbonate resin because thermotolerance, oxygen index are high, electrology characteristic and mechanical characteristics also good, be therefore widely used in vehicular field, building, building field.Particularly polycarbonate resin foam is in the building materials purposes of mechanical characteristics requiring thermotolerance, flame retardant resistance and excellence, expects the purposes widely such as developing lightweight structural materials, lagging material, interior finish.But, because polycarbonate resin (being sometimes called hereinafter " PC resin ") and other resin are as compared with polystyrene, there is much higher melt viscosity under close to its blowing temperature and require high extrusion pressure, be therefore difficult to extrude PC resin and make it foam.In addition, whipping agent is unstable in polycarbonate resin, easily reunites, causes foaming uneven, the melt tension of adding PC resin much smaller than other resin as polystyrene, so abscess is easy to break at growing period.Therefore, be difficult to obtain the little foam material of expansion density.
Therefore, be starved of that exploitation is a kind of to be easy to foam and the very little foam material of expansion density.
Summary of the invention
In order to solve the problem, one aspect of the present invention provides a kind of expandable resin particle, by weight, comprises:
(1) MBS 100
(2) whipping agent 20 ~ 60.
In one embodiment, in described MBS, the massfraction of methyl methacrylate is about 20%-60%; Preferably, in described MBS, the massfraction of methyl methacrylate is about 35%-45%; More preferably, in described MBS, the massfraction of methyl methacrylate is about 40%.
In one embodiment, described whipping agent is selected from one or more the combination in Barium azodicarboxylate, barium azodicarboxylate, hydrazo-dicarbonamide, oxalyl hydrazine, nitroguanidine, tolysulfonyl amido urea, three diazanyl s-triazine; Preferably, described whipping agent is selected from one or more the combination in Barium azodicarboxylate, barium azodicarboxylate and hydrazo-dicarbonamide; More preferably, described whipping agent is Barium azodicarboxylate.
In one embodiment, described expandable resin particle, can be used for preparation PC foam material.
Another aspect of the present invention relates to the method preparing described expandable resin particle, adds Banbury mixer mix by MBS and whipping agent, then by injection moulding machine extruding pelletization.
Another aspect of the present invention relates to a kind of foamable composite, by weight, comprises:
(1) polycarbonate (PC) 100
(2) above-mentioned expandable resin particle 10 ~ 60.
Another aspect of the present invention relates to a kind of goods, the foam material that described goods are comprised described foamable composite or obtained by foaming said composition.
Another aspect of the present invention relates to a kind of method using described foamable composite to prepare foam material, comprising:
(1) raw material is taken according to described weight part;
(2) after above-mentioned raw materials being stirred in medium speed mixer fully mixing, send in twin screw extruder through measuring apparatus, through melt extruding, cooling forming in a mold, the temperature controlling twin screw extruder is about 240 ~ 300 DEG C.
Be easier to understand the above-mentioned of the application and other features, aspect and advantage with reference to following detailed description.
Embodiment
The detailed description of the following preferred implementation method of the present invention of participation in the election and the embodiment comprised more easily can understand present disclosure.Can mention a large amount of term in following specification sheets and claims, these terms are defined as following implication.
Singulative comprises plural number and object is discussed, unless clearly indicated in addition in context.
" optional " or " optionally " refers to that the item that describes thereafter or event can occur or not occur, and this description comprises situation that event occurs and the situation that event does not occur.
Approximate term in specification sheets and claims is used for modifying quantity, represents that the present invention is not limited to this concrete quantity, also comprises close to this quantity acceptable and can not cause the part of the correction of the change of relevant basic function.Accordingly, modify a numerical value with " approximately ", " about " etc., mean and the invention is not restricted to this exact numerical.In some example, approximate term may correspond to the precision of the instrument measuring numerical value.In present specification and claims, scope limits and can combine and/or exchange, if do not illustrate that these scopes comprise contained all subranges therebetween in addition.
First aspect of the present invention provides a kind of expandable resin particle, by weight, comprises:
(1) MBS 100
(2) whipping agent 20 ~ 60.
Preferably, in the MBS used in the present invention, stratum nucleare is formed by butadiene-styrene polymer, and shell is formed by methyl methacrylate.
Chemical formula 1
Chemical formula 1 represents the modular construction of the butadiene-styrene polymer contained in stratum nucleare, and wherein the left-hand part of chemical formula 3 is butadiene unit and right hand portion is styrene units.
Chemical formula 2
Chemical formula 2 represents the modular construction of the methyl methacrylate polymer contained in shell;
The commercially available product that can preferably use comprises METABLEN C-223A, METABLENC-323A, METABLEN C-215A, METABLEN C-201A, METABLEN C-202, METABLEN C-102, METABLEN C-104A and METABLEN C-132 (trade(brand)name; Can purchased from Mitsubishi Rayon Co.Ltd.), KANE ACE (trade(brand)name; Can purchased from Kaneka Corporation) and ROHM AND HAAS KM355P.
The term " whipping agent " used in the application is that those can discharge the gas such as carbonic acid gas and nitrogen after thermal degradation, and forms the compound of pore in polymkeric substance composition.
In one embodiment, in described MBS, the massfraction of methyl methacrylate is about 20%-60%; Preferably, in described MBS, the massfraction of methyl methacrylate is about 35%-45%; More preferably, in described MBS, the massfraction of methyl methacrylate is about 40%.
In one embodiment, described whipping agent is selected from one or more the combination in Barium azodicarboxylate, barium azodicarboxylate, hydrazo-dicarbonamide, oxalyl hydrazine, nitroguanidine, tolysulfonyl amido urea, three diazanyl s-triazine; Preferably, described whipping agent is selected from one or more the combination in Barium azodicarboxylate, barium azodicarboxylate and hydrazo-dicarbonamide; More preferably, described whipping agent is Barium azodicarboxylate.
In one embodiment, described expandable resin particle, can be used for preparing polystyrene, polypropylene, polyvinyl chloride and polycarbonate foam material; Preferably, described expandable resin particle is for the preparation of polycarbonate foam material.
Second aspect of the present invention provides a kind of method preparing described expandable resin particle, adds Banbury mixer mix by MBS and whipping agent, then by injection moulding machine extruding pelletization.
In the prior art, prepare expandable resin particle need first by resin melting in an extruder, the mould installed by forcing machine front end is extruded tubular strand thing cutting and after obtaining tubular resin particle, again in encloses container, by High Temperature High Pressure, pneumatogen is impregnated in resin particle and obtains.Aforesaid method, technique is complicated and condition harsh, and due to the blow point of pneumatogen low, generally only by self foaming obtain goods.
The method of the application is the whipping agent selecting blow point higher, and Controlling Technology condition, is mixed in MBS by banburying, then extruding pelletization, obtains expandable resin particle.Therefore, relative to prior art, the very easy and easy handling of the method for the application.And the expandable resin particle in the application, except self foaming, is more suitable for foaming with other resin alloys.
3rd aspect of the present invention provides a kind of foamable composite, by weight, comprises:
(1) polycarbonate (PC) 100
(2) above-mentioned expandable resin particle 10 ~ 60.
There is no particular restriction for the polycarbonate resin used in the present invention, but preferably, use using carbonic diester and aromatic dihydroxy compound as raw material, by aromatic polycarbonate resin that transesterification reaction legal system is standby under alkali metal compound catalyzer exists.In transesterification reaction method, the aromatic dihydroxy compound as raw material can enumerate such as following compound;
Specifically, two (4-hydroxy phenyl) methane can be enumerated, two (4-hydroxy phenyl) ethane of 1,1-, two (4-hydroxy phenyl) propane (dihydroxyphenyl propane) of 2,2-, two (the 4-hydroxy-3-methyl phenyl) propane of 2,2-, two (4-hydroxyl-3-tert-butyl-phenyl) propane of 2,2-, two (4-hydroxyl-3, the 5-3,5-dimethylphenyl) propane of 2,2-, two (3-tert-butyl-hydroxy phenyl) propane of 1,1-, two (4-hydroxyl-3, the 5-dibromo phenyl) propane (tetrabromo-bisphenol) of 2,2-, two (the bromo-4-hydroxy phenyl of the 3-) propane of 2,2-, two (the chloro-4-hydroxy phenyl of 3, the 5-bis-) propane of 2,2-, two (4-hydroxy phenyl) heptane of 2,2-, two (4-hydroxy phenyl) pentamethylene of 1,1-, 1,1-bis(4-hydroxyphenyl) cyclohexane, two (the chloro-4-hydroxy phenyl of 3, the 5-bis-) hexanaphthene of 1,1-, two (the bromo-4-hydroxy phenyl of 3, the 5-bis-) hexanaphthene of 1,1-, 3,3 ', 5,5 '-tetramethyl--4,4 '-dihydroxybiphenyl, two (4-hydroxy phenyl) sulfone, two (4-hydroxy phenyl) thioether, two (4-hydroxy phenyl) ether, two (4-hydroxy phenyl) ketone etc.These aromatic dihydroxy compounds can separately or mix two or more to use.Wherein, be preferably 2, two (4-hydroxy phenyl) propane (dihydroxyphenyl propane), 2 of 2-, two (the 4-hydroxy-3-methyl phenyl) propane of 2-, 2,2-two (4-hydroxyl-3-tert-butyl-phenyl) propane, 2,2-two (4-hydroxyls-3,5-3,5-dimethylphenyl) propane, 1, two (3-tert-butyl-hydroxy phenyl) propane of 1-, 2,2-two (4-hydroxyl-3,5-dibromo phenyl) propane (tetrabromo-bisphenol) etc.
Above-mentioned carbonic diester, can enumerate such as with the replacement diphenyl carbonate that diphenyl carbonate, carboxylol ester etc. are representative, or with the dialkyl carbonate that methylcarbonate, diethyl carbonate, dimethyl dicarbonate butyl ester etc. are representative.
In one embodiment, described polycarbonate resin is that weight-average molecular weight is at the bisphenol A polycarbonate about between 20000 ~ 40000g/mol; Preferably, described polycarbonate resin is the bisphenol A polycarbonate that weight-average molecular weight is about 30000g/mol.
4th aspect of the present invention provides a kind of goods, the foam material that described goods are comprised described foamable composite or obtained by foaming said composition.
5th aspect of the present invention provides a kind of method using described foamable composite to prepare foam material, comprising:
(1) raw material is taken according to described weight part;
(2) after above-mentioned raw materials being stirred in medium speed mixer fully mixing, send in twin screw extruder through measuring apparatus, through melt extruding, cooling forming in a mold, the temperature controlling twin screw extruder is about 240 ~ 300 DEG C.
In one embodiment, the temperature of described twin screw extruder is about 260 ~ 280 DEG C; Preferably, the temperature of described twin screw extruder is about 270 DEG C.
By following embodiment, the present invention will be described, and described embodiment not limits scope of the present invention.
Below, be described for embodiment, wherein polycarbonate used (PC) is 2,2-two (4-hydroxy phenyl) propane (dihydroxyphenyl propane) and dipheryl carbonate polyisocyanate polyaddition gained.
[embodiment 1]
In the present embodiment, make expandable resin particle, and use the composition of this expandable resin particle and polycarbonate (PC) to prepare foam material.
Below, be described for the expandable resin particle of the present embodiment and the manufacture method of foam material.
(1) making of expandable resin particle
The MBS (massfraction of methyl methacrylate is about 20%) of 100 weight parts and the Barium azodicarboxylate mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
(2) making of PC foam material
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 50, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 2]
The MBS (massfraction of methyl methacrylate is about 30%) of 100 weight parts and the Barium azodicarboxylate mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 50, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 3]
The MBS (massfraction of methyl methacrylate is about 40%) of 100 weight parts and the Barium azodicarboxylate mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 50, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 4]
The MBS (massfraction of methyl methacrylate is about 55%) of 100 weight parts and the Barium azodicarboxylate mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 50, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 5]
The MBS (massfraction of methyl methacrylate is about 40%) of 100 weight parts and the barium azodicarboxylate mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 50, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 6]
The MBS (massfraction of methyl methacrylate is about 55%) of 100 weight parts and the barium azodicarboxylate mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 50, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 7]
The MBS (massfraction of methyl methacrylate is about 40%) of 100 weight parts and the hydrazo-dicarbonamide mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 50, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 8]
The MBS (massfraction of methyl methacrylate is about 40%) of 100 weight parts and the tolysulfonyl amido urea mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 50, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 9]
The MBS (massfraction of methyl methacrylate is about 40%) of 100 weight parts and the Barium azodicarboxylate mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 45, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 10]
The MBS (massfraction of methyl methacrylate is about 40%) of 100 weight parts and the Barium azodicarboxylate mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 20, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 11]
The MBS (massfraction of methyl methacrylate is about 40%) of 100 weight parts and the Barium azodicarboxylate mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 20000g/mol) 100, expandable resin particle 20, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 12]
The MBS (massfraction of methyl methacrylate is about 40%) of 100 weight parts and the Barium azodicarboxylate mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 40000g/mol) 100, expandable resin particle 20, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 13]
The MBS (massfraction of methyl methacrylate is about 40%) of 100 weight parts and the barium azodicarboxylate mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 20, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 250 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[embodiment 14]
The MBS (massfraction of methyl methacrylate is about 40%) of 100 weight parts and the hydrazo-dicarbonamide mixture of 60 weight parts are put into carry out at 160 DEG C in mixing roll mixing, use forcing machine extruding pelletization at 90 DEG C again evenly, obtain expandable resin particle.
Each raw material is taken: polycarbonate (PC according to following weight part, weight-average molecular weight is about 30000g/mol) 100, expandable resin particle 20, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 290 DEG C, twin screw extruder rotating speed is 600rpm, and pressure is 2MPa, and raw material is through melt extruding, cooling forming in a mold, obtains lightweight foam material.
[comparative example 1]
Each raw material is taken: polycarbonate (PC) 100 according to following weight part, MBS (massfraction of methyl methacrylate is about 40%) 50, azo first carboxylic acid barium mixture 30, above-mentioned raw materials is stirred in medium speed mixer fully mixing after 20 minutes, sending into length-to-diameter ratio through measuring apparatus is in the twin screw extruder of 32:1, the temperature controlling twin screw extruder is 270 DEG C, twin screw extruder rotating speed is 600rpm, pressure is 2MPa, raw material is through melt extruding, cooling forming in a mold, obtain lightweight foam material.
testing method
Product performance test condition is as follows:
Tensile property: by ISO527 method, draw speed 50 mm/min.
Bending property: by ISO178 method, trial speed 2 mm/min.
Apparent density: by the weight (g) of foamed material product divided by volume (m
3) calculate, wherein said volume measures by being immersed in the water by these goods.
It is as shown in the table for test result.
Table 1
By foam material prepared by method of the present invention, there is very little expansion density, can auto parts be widely used in, electric or electronic component, wrapping material and socket etc.
Aforesaid example is only illustrative, for explaining some features of feature of the present disclosure.Appended claim is intended to the scope wide as far as possible that requirement it is contemplated that, and the embodiment presented herein is only the explanation of the embodiment of the selection of combination according to all possible embodiment.Therefore, the purpose of applicant is the selectional restriction that appended claim is not illustrated the example of feature of the present invention.And progress in science and technology is not replaced to be formed due to the inaccurate reason of language performance by the possible equivalent considered at present or son, and these changes also should be interpreted as being covered by appended claim in the conceived case.
Claims (10)
1. an expandable resin particle, by weight, comprises:
(1) MBS 100
(2) whipping agent 20 ~ 80.
2. expandable resin particle as claimed in claim 1, wherein, in described MBS, the massfraction of methyl methacrylate is about 20%-60%.
3. expandable resin particle as claimed in claim 1, wherein, described whipping agent is selected from one or more the combination in Barium azodicarboxylate, barium azodicarboxylate, hydrazo-dicarbonamide, oxalyl hydrazine, nitroguanidine, tolysulfonyl amido urea, three diazanyl s-triazine.
4. expandable resin particle as claimed in claim 1, is applied to and prepares polycarbonate foam material.
5. prepare a method for expandable resin particle as claimed in claim 1, comprising: described MBS and described whipping agent are added Banbury mixer and mixes, then by injection moulding machine extruding pelletization.
6. a foamable composite, by weight, comprises:
(1) polycarbonate (PC) 100
(2) expandable resin particle 10 ~ 60 as claimed in claim 1.
7. can foam combination group as claimed in claim 6, and wherein, described polycarbonate (PC) is for weight-average molecular weight is at the bisphenol A polycarbonate about between 20000 ~ 40000g/mol.
8. goods, the foam material comprising foamable composite as claimed in claim 6 or obtained by foaming said composition.
9. use foamable composite as claimed in claim 6 to prepare a method for foam material, comprising:
(1) raw material is taken according to weight part according to claim 6;
(2) after above-mentioned raw materials being stirred in medium speed mixer fully mixing, send in twin screw extruder through measuring apparatus, through melt extruding, cooling forming in a mold, the temperature controlling twin screw extruder is about 240 ~ 300 DEG C.
10. prepare the method for foam material as claimed in claim 9, wherein, the temperature of described twin screw extruder is about 260 ~ 280 DEG C.
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| CN105219055A (en) * | 2015-10-20 | 2016-01-06 | 西南科技大学 | A kind of fretting map luminous reflectance PC mould material and preparation method thereof |
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