CN104177724B - A kind of denatured conductive type hard crosslinked polyvinyl chloride foam and preparation method thereof - Google Patents
A kind of denatured conductive type hard crosslinked polyvinyl chloride foam and preparation method thereof Download PDFInfo
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- CN104177724B CN104177724B CN201310206458.8A CN201310206458A CN104177724B CN 104177724 B CN104177724 B CN 104177724B CN 201310206458 A CN201310206458 A CN 201310206458A CN 104177724 B CN104177724 B CN 104177724B
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Abstract
The invention discloses a kind of modified hard cross-linked polrvinyl chloride flame-retardant foam, it is prepared from by following raw materials in parts by weight number ratio: PVC paste resin 90～99 parts, chlorinated polyvinyl chloride resin 1～10 parts, cross-linking agent 3～15 parts, isocyanates 30～70 parts, anhydride 9～24 parts, azo foaming agent 4～8 parts, epoxy soybean oil 2～15 parts, conductive filler 5～50 parts.The present invention passes through optimization of C/C composites, and the foam of preparation had both had the good mechanical of ordinary rigid crosslinked polyvinyl chloride foam, decay resistance, and had again good electric conductivity, and can be widely applied to multiple electrical field.
Description
Technical field
The present invention relates to polymer foams field, hand in particular to a kind of denatured conductive type hard
Connection polyvinyl chloride foam and preparation method thereof.
Background technology
Hard crosslinked polyvinyl chloride foam has a light-high-strength, the typical characteristic of the structural core such as high-modulus,
Relative to other high-performance foams such as polymethacrylimide foam, polyethyerimide foam etc., there is system
Make that low cost, water resistance be high, the preferable advantage of flame retardant effect, boats and ships, wind energy, transportation,
The field such as sports equipment, Aero-Space is in an increasingly wide range of applications.About hard cross-linked polrvinyl chloride
The composition of raw materials of foam and preparation method, had numerous patents to carry out disclosure, such as United States Patent (USP)
US2007/0200266A1 and US2010/0068487, Chinese patent CN101580573A etc..But,
Existing hard crosslinked polyvinyl chloride foam does not the most possess electric conductivity, is seldom related to have lead
The research of the hard crosslinked polyvinyl chloride foam of electrical property, therefore it provides a kind of light-high-strength, corrosion resistant
Erosion performance is good, has again the hard crosslinked polyvinyl chloride foam of excellent conductive performance simultaneously, anxious for this area
Need to solve the technical problem that.
Summary of the invention
It is an object of the invention to provide a kind of denatured conductive type hard crosslinked polyvinyl chloride foam, this foam was both
There is the good mechanical of ordinary rigid crosslinked polyvinyl chloride foam, decay resistance, there is again good leading
Electrically, can be widely applied to multiple electrical field.
Research find, in the formula of modified hard crosslinked polyvinyl chloride foam add conductive carbon black, graphite,
The conductive fillers such as conductive carbon fibre, aluminum, copper, nickel, ferrum, it is possible to significantly improve the electric conductivity of foam,
But likely the light-high-strength of foam, the mechanical performance of high-modulus can be produced after adding conductive filler
Raw certain adverse effect, the addition of conductive filler is also directly related with foam conductive performance simultaneously.Logical
Cross a large amount of experimental study electric conductivity, mechanical performance and the relation of each amounts of components proportioning, can find out
Suitably raw material dosage proportioning, makes modified hard crosslinked polyvinyl chloride foam be provided simultaneously with excellent mechanicalness
Energy and electric conductivity.
For achieving the above object, the present invention takes techniques below scheme:
A kind of denatured conductive type hard crosslinked polyvinyl chloride foam, it is characterised in that by following raw material by weight
Portion rate is prepared from: PVC paste resin 90～99 parts, chlorinated polyvinyl chloride resin 1～10 parts, hands over
Connection agent 3～15 parts, isocyanates 30～70 parts, anhydride 9～24 parts, azo foaming agent 4～8 parts, ring
Oxygen soybean oil 2～15 parts, conductive filler 5～50 parts；Wherein:
Described cross-linking agent is selected from Triallyl isocyanurate or trimethylol-propane trimethacrylate
A kind of；
Described isocyanates selects the '-diphenylmethane diisocyanate or many that white carbodiimides-urine ketimide is modified
One or both of polymethylene polyphenyl polyisocyanates；
Described anhydride is selected from cis-hexamethylene-1, one or both of 2-dicarboxylic anhydride or methyl hexahydrophthalic anhydride；
Described foaming agent is the mixture of azodicarbonamide and azodiisobutyronitrile, and both weight ratios are 1:
1～1: 5；
Described conductive filler selected from conductive carbon black, graphite, conductive carbon fibre, aluminum, copper, nickel, the one of ferrum
Plant or several.
Preferably, the K value of above-mentioned PVC paste resin is 70～80, and chlorinated polyvinyl chloride resin is chloride
Amount is not less than 64%, and PVC paste resin and chlorinated polyvinyl chloride resin weight sum are 100 parts.
It is further preferred that conductive filler is one or both of conductive carbon black or conductive carbon fibre.
It is a further object to provide the system of above-mentioned denatured conductive type hard crosslinked polyvinyl chloride foam
Preparation Method, takes following steps:
A the raw material in described component being liquid, under 0.09MPa, is carried out mixing all by described weight by ()
Even, then the raw material in described component being solid is added in liquid by described weight, stir 10～30 points
Clock obtains homogeneous paste mixture；
B homogeneous paste mixture is poured into the mould of good seal by (), be 145～195 DEG C and pressure in temperature
It is by force to carry out compression molding under conditions of 5～30MPa, cools down mould die sinking, obtain die briquetting；
C die briquetting that step (b) is obtained by () is positioned in the vaporium of 70～98 DEG C and foams,
To foam；
D foam that step (c) is obtained by () carries out cured in the vaporium of 40～80 DEG C and is changed
Property conductivity type hard crosslinked polyvinyl chloride foam.
The beneficial effects of the present invention is, by groping optimization of C/C composites, prepared and there is satisfactory electrical conductivity
The denatured conductive type hard cross-linked polrvinyl chloride flame-retardant foam of energy, it is poly-that this foam had both had modified hard crosslinking
Original advantageous property of chloride foams, has again good electric conductivity, enters electrical field for this material
And play its advantage further and provide the foundation.
Detailed description of the invention
The present invention will be further described below:
Following formula every part is 1 kilogram.
Embodiment 1
Recipe ingredient is formed by following weight part ratio: K value is the PVC paste resin 90 parts of 70, contains
The chlorinated polyvinyl chloride resin of chlorine dose 64% 10 parts, Triallyl isocyanurate 3 parts, carbodiimides
The '-diphenylmethane diisocyanate 30 parts that-urine ketimide is modified, cis-hexamethylene-1,2-dicarboxylic anhydride 9 parts,
Azodicarbonamide and 4 parts of the mixture of azodiisobutyronitrile, and azodicarbonamide is different with azo two
Butyronitrile weight ratio is 1: 1, epoxy soybean oil 2 parts, conductive carbon black 5 parts.
According to formula dispensing, under vacuum is 0.09MPa, the raw material in described component being liquid is pressed
Described weight carries out mix homogeneously, then by described weight, the raw material in described component being solid is added liquid
Internal, stir 30 minutes to obtain homogeneous paste mixture；The thickener of preparation is filled 25mm thickness steel die,
Being put into by mould in the platen-press of 195 DEG C after matched moulds, pressure is to keep cooling mould after 10min under 5MPa
Tool, the die sinking when mold temperature is less than 60 DEG C, obtain die briquetting；The die briquetting of taking-up is placed in 98 DEG C
Vaporium is carried out foam 4 hours, prepare foam；By foam post processing 4 days in the vaporium of 80 DEG C,
Preparing density is 75kg/m3Denatured conductive type hard cross-linked polrvinyl chloride flame-retardant foam.Its performance indications
As shown in table 1.
Embodiment 2
Recipe ingredient is formed by following weight part ratio: K value is the PVC paste resin 99 parts of 80, contains
The chlorinated polyvinyl chloride resin of chlorine dose 68% 1 part, trimethylol-propane trimethacrylate 15 parts is many
Polymethylene polyphenyl polyisocyanates (commercial goods, for mixture) 70 parts, methyl hexahydrophthalic anhydride 24 parts,
Azodicarbonamide and 8 parts of the mixture of azodiisobutyronitrile, and azodicarbonamide is different with azo two
Butyronitrile weight ratio is 1: 5, epoxy soybean oil 15 parts, copper powder 20 parts.
According to formula dispensing, under vacuum is 0.09MPa, the raw material in described component being liquid is pressed
Described weight carries out mix homogeneously, then by described weight, the raw material in described component being solid is added liquid
Internal, stir 20 minutes to obtain homogeneous paste mixture；The thickener of preparation is filled 25mm thickness steel die,
Being put into by mould in the platen-press of 145 DEG C after matched moulds, pressure is to keep cooling after 10min under 30MPa
Mould, the die sinking when mold temperature is less than 60 DEG C；It is placed in the vaporium of 92 DEG C by the die briquetting of taking-up
Row foaming 2 hours, prepares foam；By foam post processing 2 days in the vaporium of 60 DEG C, prepare close
Degree is 45kg/m3Denatured conductive type hard crosslinked polyvinyl chloride foam.Its performance indications such as table 1
Shown in.
Embodiment 3
Recipe ingredient is formed by following weight part ratio: K value is the PVC paste resin 95 parts of 75, contains
The chlorinated polyvinyl chloride resin of chlorine dose 70% 5 parts, trimethylol-propane trimethacrylate 8 parts, carbon
Change the modified '-diphenylmethane diisocyanate 25 parts of diimine-urine ketimide and polymethylene polyphenyl polyisocyanate
The mixture 6 of cyanate 25 parts, methyl hexahydrophthalic anhydride 10 parts, azodicarbonamide and azodiisobutyronitrile
Part, and azodicarbonamide and azodiisobutyronitrile weight ratio be 1: 3, epoxy soybean oil 10 parts,
10 parts of graphite, conductive carbon fibre (market is on sale) 20 parts.
According to formula dispensing, under vacuum is 0.09MPa, the raw material in described component being liquid is pressed
Described weight carries out mix homogeneously, then by described weight, the raw material in described component being solid is added liquid
Internal, stir 15 minutes to obtain homogeneous paste mixture；The thickener of preparation is filled 25mm thickness steel die,
Being put into by mould in the platen-press of 175 DEG C after matched moulds, pressure is to keep cooling after 10min under 20MPa
Mould, the die sinking when mold temperature is less than 60 DEG C；It is placed in the vaporium of 70 DEG C by the die briquetting of taking-up
Row foaming 3 hours, prepares foam；By foam post processing 3 days in the vaporium of 40 DEG C, prepare close
Degree is 60kg/m3Hard crosslinked polyvinyl chloride foam.Its performance indications are as shown in table 1.
Embodiment 4
Recipe ingredient is formed by following weight part ratio: K value is the PVC paste resin 92 parts of 76, contains
The chlorinated polyvinyl chloride resin of chlorine dose 72% 8 parts, Triallyl isocyanurate 10 parts, carbodiimides
The '-diphenylmethane diisocyanate 20 parts of-urine ketimide modification and poly methylene poly phenyl poly isocyanate 30
Part, cis-hexamethylene-1,2-dicarboxylic anhydride 15 parts, azodicarbonamide and the mixture 7 of azodiisobutyronitrile
Part, and azodicarbonamide and azodiisobutyronitrile weight ratio be 1: 2, epoxy soybean oil 5 parts,
Aluminium powder 20 parts, iron powder 20 parts, nikel powder 5 parts.
According to formula dispensing, under vacuum is 0.09MPa, the raw material in described component being liquid is pressed
Described weight carries out mix homogeneously, then by described weight, the raw material in described component being solid is added liquid
Internal, stir 15 minutes to obtain homogeneous paste mixture；The thickener of preparation is filled 25mm thickness steel die,
Being put into by mould in the platen-press of 178 DEG C after matched moulds, pressure is to keep cooling after 10min under 25MPa
Mould, the die sinking when mold temperature is less than 60 DEG C；It is placed in the vaporium of 96 DEG C by the die briquetting of taking-up
Row foaming 3 hours, prepares foam；By foam post processing 2 days in the vaporium of 60 DEG C, prepare close
Degree is 70kg/m3Hard crosslinked polyvinyl chloride foam.Its performance indications are as shown in table 1.
Embodiment 5
Recipe ingredient is formed by following weight part ratio: K value is the PVC paste resin 94 parts of 72, contains
The % chlorinated polyvinyl chloride resin of chlorine dose 75 6 parts, Triallyl isocyanurate 12 parts, carbodiimides
The '-diphenylmethane diisocyanate 10 parts of-urine ketimide modification and poly methylene poly phenyl poly isocyanate 40
Part, cis-hexamethylene-1,2-dicarboxylic anhydride 20 parts, azodicarbonamide and the mixture 5 of azodiisobutyronitrile
Part, and azodicarbonamide and azodiisobutyronitrile weight ratio be 1: 4, epoxy soybean oil 7 parts,
Conductive carbon fibre 50 parts.
According to formula dispensing, under vacuum is 0.09MPa, the raw material in described component being liquid is pressed
Described weight carries out mix homogeneously, then by described weight, the raw material in described component being solid is added liquid
Internal, stir 15 minutes to obtain homogeneous paste mixture；The thickener of preparation is filled 25mm thickness steel die,
Being put into by mould in the platen-press of 172 DEG C after matched moulds, pressure is to keep cooling after 10min under 10MPa
Mould, the die sinking when mold temperature is less than 60 DEG C；It is placed in the vaporium of 98 DEG C by the die briquetting of taking-up
Row foaming 2 hours, prepares foam；By foam post processing 2 days in the vaporium of 60 DEG C, prepare close
Degree is 90kg/m3Hard crosslinked polyvinyl chloride foam.Its performance indications data are as shown in table 1.
Comparative example 1:
Recipe ingredient is formed by following weight part ratio: K value is the PVC paste resin 92 parts of 76, contains
The chlorinated polyvinyl chloride resin of chlorine dose 72% 8 parts, Triallyl isocyanurate 10 parts, carbodiimides
The '-diphenylmethane diisocyanate 20 parts of-urine ketimide modification and poly methylene poly phenyl poly isocyanate 30
Part, cis-hexamethylene-1,2-dicarboxylic anhydride 15 parts, azodicarbonamide and the mixture 7 of azodiisobutyronitrile
Part, and azodicarbonamide and azodiisobutyronitrile weight ratio be 1: 2, epoxy soybean oil 5 parts.
According to formula dispensing, under vacuum is 0.09MPa, the raw material in described component being liquid is pressed
Described weight carries out mix homogeneously, then by described weight, the raw material in described component being solid is added liquid
Internal, stir 15 minutes to obtain homogeneous paste mixture；The thickener of preparation is filled 25mm thickness steel die,
Being put into by mould in the platen-press of 160 DEG C after matched moulds, pressure is to keep cooling after 10min under 25MPa
Mould, the die sinking when mold temperature is less than 60 DEG C；It is placed in the vaporium of 96 DEG C by the die briquetting of taking-up
Row foaming 4 hours, prepares foam；By foam post processing 2 days in the vaporium of 60 DEG C, prepare close
Degree is 62kg/m3Hard crosslinked polyvinyl chloride foam.Its performance indications are as shown in table 1.
Table 1 illustrates, owing to not using conductive filler in comparative example, with embodiment 3 phase of similar density
Ratio, the electric conductivity of the obtained crosslinked polyvinyl chloride foam of embodiment 3 is all remarkably higher than comparative example.
From embodiment 1 to embodiment 5, it can be seen that along with crosslinked polyvinyl chloride foam obtained by the present invention
Conductive filler increase, its electric conductivity improve.In general, owing to present invention employs conductive filler,
The conductive effect of obtained foam increases.
Table 1 embodiment 1-5 and the mechanical property of comparative example 1 and resistivity
Claims (4)
1. a denatured conductive type hard crosslinked polyvinyl chloride foam, it is characterised in that by following raw material by weight
Amount portion rate is prepared from: PVC paste resin 90～99 parts, chlorinated polyvinyl chloride resin 1～10 parts,
Cross-linking agent 3～15 parts, isocyanates 30～70 parts, anhydride 9～24 parts, azo foaming agent 4～8 parts,
Epoxy soybean oil 2～15 parts, conductive filler 5～50 parts；Wherein:
Described cross-linking agent is selected from Triallyl isocyanurate or trimethylol-propane trimethacrylate
A kind of；
Described isocyanates is poly methylene poly phenyl poly isocyanate；
Described anhydride is selected from cis-hexamethylene-1, one or both of 2-dicarboxylic anhydride or methyl hexahydrophthalic anhydride；
Described foaming agent is the mixture of azodicarbonamide and azodiisobutyronitrile, and both weight ratios are 1:
1～1: 5；
Described conductive filler selected from conductive carbon black, graphite, conductive carbon fibre, aluminum, copper, nickel, the one of ferrum
Plant or several.
2. denatured conductive type hard crosslinked polyvinyl chloride foam as claimed in claim 1, it is characterised in that
The K value of described PVC paste resin is 70～80, and chlorinated polyvinyl chloride resin chlorinty is not less than 64%,
PVC paste resin and chlorinated polyvinyl chloride resin weight sum are 100 parts.
3. denatured conductive type hard crosslinked polyvinyl chloride foam as claimed in claim 1, it is characterised in that
Described conductive filler is one or both of conductive carbon black or conductive carbon fibre.
4. the denatured conductive type hard crosslinked polyvinyl chloride foam as described in any one of claim 1,2,3
Preparation method, it is characterised in that comprise the steps:
A the raw material in described component being liquid, under 0.09MPa, is carried out mixing all by described weight by ()
Even, then the raw material in described component being solid is added in liquid by described weight, stir 10～30 points
Clock obtains homogeneous paste mixture；
B homogeneous paste mixture is poured into the mould of good seal by (), be 145～195 DEG C and pressure in temperature
It is by force to carry out compression molding under conditions of 5～30MPa, cools down mould die sinking, obtain die briquetting；
C die briquetting that step (b) is obtained by () is positioned in the vaporium of 70～98 DEG C and foams,
To foam；
D foam that step (c) is obtained by () carries out cured in the vaporium of 40～80 DEG C and is changed
Property conductivity type hard crosslinked polyvinyl chloride foam.
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| CN108623770A (en) * | 2017-03-22 | 2018-10-09 | 广元瑞峰新材料有限公司 | The production method of PVC crosslinking accelerators |
| CN107033811A (en) * | 2017-05-05 | 2017-08-11 | 安徽国登管业科技有限公司 | Effective bonding agent of steel plastic compount and preparation method thereof |
| CN109054235A (en) * | 2018-07-12 | 2018-12-21 | 洛阳科博思新材料科技有限公司 | A kind of New Rigid crosslinked polyvinyl chloride structural foam material and preparation method thereof |
| CN112662090A (en) * | 2020-12-21 | 2021-04-16 | 淄博科信腾达信息科技有限公司 | Modified rigid polyvinyl chloride foam and preparation method thereof |
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