CN114656916A - Sealant for environment-friendly high-voltage cable intermediate joint and preparation method thereof - Google Patents
Sealant for environment-friendly high-voltage cable intermediate joint and preparation method thereof Download PDFInfo
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- CN114656916A CN114656916A CN202210358758.7A CN202210358758A CN114656916A CN 114656916 A CN114656916 A CN 114656916A CN 202210358758 A CN202210358758 A CN 202210358758A CN 114656916 A CN114656916 A CN 114656916A
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- sealant
- flame retardant
- phosphate
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- 239000000565 sealant Substances 0.000 title claims abstract description 149
- 238000002360 preparation method Methods 0.000 title claims abstract description 55
- 239000003063 flame retardant Substances 0.000 claims abstract description 63
- 239000002994 raw material Substances 0.000 claims abstract description 56
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 54
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 44
- 239000011574 phosphorus Substances 0.000 claims abstract description 44
- 239000012796 inorganic flame retardant Substances 0.000 claims abstract description 31
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 28
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical group [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 28
- 229920000570 polyether Polymers 0.000 claims abstract description 28
- 239000000945 filler Substances 0.000 claims abstract description 15
- 239000012188 paraffin wax Substances 0.000 claims abstract description 15
- 239000003054 catalyst Substances 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 14
- SBJCUZQNHOLYMD-UHFFFAOYSA-N 1,5-Naphthalene diisocyanate Chemical compound C1=CC=C2C(N=C=O)=CC=CC2=C1N=C=O SBJCUZQNHOLYMD-UHFFFAOYSA-N 0.000 claims abstract description 12
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 12
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims abstract description 12
- YIMQCDZDWXUDCA-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1CCC(CO)CC1 YIMQCDZDWXUDCA-UHFFFAOYSA-N 0.000 claims abstract description 11
- VNTDZUDTQCZFKN-UHFFFAOYSA-L zinc 2,2-dimethyloctanoate Chemical compound [Zn++].CCCCCCC(C)(C)C([O-])=O.CCCCCCC(C)(C)C([O-])=O VNTDZUDTQCZFKN-UHFFFAOYSA-L 0.000 claims abstract description 11
- SKDHHIUENRGTHK-UHFFFAOYSA-N 4-nitrobenzoyl chloride Chemical compound [O-][N+](=O)C1=CC=C(C(Cl)=O)C=C1 SKDHHIUENRGTHK-UHFFFAOYSA-N 0.000 claims abstract description 10
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 150000002009 diols Chemical class 0.000 claims abstract description 10
- GPZYYYGYCRFPBU-UHFFFAOYSA-N 6-Hydroxyflavone Chemical compound C=1C(=O)C2=CC(O)=CC=C2OC=1C1=CC=CC=C1 GPZYYYGYCRFPBU-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910019142 PO4 Inorganic materials 0.000 claims description 43
- 238000002156 mixing Methods 0.000 claims description 43
- 239000010452 phosphate Substances 0.000 claims description 43
- GTRSAMFYSUBAGN-UHFFFAOYSA-N tris(2-chloropropyl) phosphate Chemical compound CC(Cl)COP(=O)(OCC(C)Cl)OCC(C)Cl GTRSAMFYSUBAGN-UHFFFAOYSA-N 0.000 claims description 43
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 42
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 24
- 229920000639 hydroxypropylmethylcellulose acetate succinate Polymers 0.000 claims description 22
- 229920001195 polyisoprene Polymers 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 19
- ITCAUAYQCALGGV-XTICBAGASA-M sodium;(1r,4ar,4br,10ar)-1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylate Chemical compound [Na+].C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C([O-])=O ITCAUAYQCALGGV-XTICBAGASA-M 0.000 claims description 17
- 239000002244 precipitate Substances 0.000 claims description 15
- 229920005614 potassium polyacrylate Polymers 0.000 claims description 14
- OWICEWMBIBPFAH-UHFFFAOYSA-N (3-diphenoxyphosphoryloxyphenyl) diphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=C(OP(=O)(OC=2C=CC=CC=2)OC=2C=CC=CC=2)C=CC=1)(=O)OC1=CC=CC=C1 OWICEWMBIBPFAH-UHFFFAOYSA-N 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000002775 capsule Substances 0.000 claims description 11
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 10
- 235000010354 butylated hydroxytoluene Nutrition 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims description 10
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000003094 microcapsule Substances 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 18
- 239000001301 oxygen Substances 0.000 abstract description 18
- 229910052760 oxygen Inorganic materials 0.000 abstract description 18
- 238000002485 combustion reaction Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 description 15
- 238000002834 transmittance Methods 0.000 description 12
- 239000000126 substance Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 239000013543 active substance Substances 0.000 description 4
- -1 aromatic isocyanate Chemical class 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 229910001377 aluminum hypophosphite Inorganic materials 0.000 description 2
- 239000003849 aromatic solvent Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 231100000956 nontoxicity Toxicity 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- HHDUMDVQUCBCEY-UHFFFAOYSA-N 4-[10,15,20-tris(4-carboxyphenyl)-21,23-dihydroporphyrin-5-yl]benzoic acid Chemical compound OC(=O)c1ccc(cc1)-c1c2ccc(n2)c(-c2ccc(cc2)C(O)=O)c2ccc([nH]2)c(-c2ccc(cc2)C(O)=O)c2ccc(n2)c(-c2ccc(cc2)C(O)=O)c2ccc1[nH]2 HHDUMDVQUCBCEY-UHFFFAOYSA-N 0.000 description 1
- 239000004970 Chain extender Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- GKXVJHDEWHKBFH-UHFFFAOYSA-N [2-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC=C1CN GKXVJHDEWHKBFH-UHFFFAOYSA-N 0.000 description 1
- VBJSFORKWZFICI-UHFFFAOYSA-N [Bi].C(CCCCC(C)C)(=O)O Chemical compound [Bi].C(CCCCC(C)C)(=O)O VBJSFORKWZFICI-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AYWLCKHHUFBVGJ-UHFFFAOYSA-N bis(7-methyloctyl) hexanedioate Chemical compound CC(C)CCCCCCOC(=O)CCCCC(=O)OCCCCCCC(C)C AYWLCKHHUFBVGJ-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000009878 intermolecular interaction Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- NUHSROFQTUXZQQ-UHFFFAOYSA-N isopentenyl diphosphate Chemical compound CC(=C)CCO[P@](O)(=O)OP(O)(O)=O NUHSROFQTUXZQQ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- CMPQUABWPXYYSH-UHFFFAOYSA-N phenyl phosphate Chemical compound OP(O)(=O)OC1=CC=CC=C1 CMPQUABWPXYYSH-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004589 rubber sealant Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-L succinate(2-) Chemical compound [O-]C(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-L 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—Polyurethanes from polyethers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/324—Alkali metal phosphate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Sealing Material Composition (AREA)
Abstract
The application relates to the field of sealants, and particularly discloses a sealant for an environment-friendly high-voltage cable intermediate joint and a preparation method thereof, wherein the environment-friendly high-voltage cable joint sealant comprises the following raw materials in parts by weight: comprises a prepolymer component and a curing component, wherein the volume ratio of the prepolymer component to the curing component is 1 (1-2); the prepolymer component comprises the following raw materials in parts by weight: polyether diol, polyether triol, 1, 5-naphthalene diisocyanate, p-nitrobenzoyl chloride, an inorganic flame retardant, 1, 4-cyclohexanedimethanol and zinc neodecanoate; the inorganic flame retardant is aluminum hydroxide micro powder; the curing component comprises the following raw materials in parts by weight: m-xylylenediamine, a phosphorus flame retardant, a paraffin filler, diisononyl adipate and an organic bismuth catalyst. The maximum limit oxygen index of the obtained sealant is 25.5%, the combustion time is 1s, the combustion grade is 0 grade, and the flame retardant property of the sealant is improved.
Description
Technical Field
The application relates to the field of sealants, in particular to a sealant for an environment-friendly high-voltage cable intermediate joint and a preparation method thereof.
Background
The middle joint of the high-voltage cable is a key part in a cable line, and an electronic plug element in the cable joint is connected with a conductor bundle after being welded or pressed, so that the requirements of looseness prevention, moisture prevention, vibration prevention, impact resistance and the like are met. In order to avoid the problems that the insulation resistance is reduced, the plug connector is corroded, the cable connector is broken and the like due to the fact that a high-voltage cable intermediate connector is not sealed under severe environments such as high temperature, high humidity and high salt fog, the air tightness, the perspective resistance and the insulativity of the high-voltage cable connector are guaranteed.
At present, the middle joint of a high-voltage cable adopts a plurality of sealing methods, namely sealing glue is encapsulated inside the high-voltage cable joint, and the connection quality between the cable joints directly influences the reliability of a cable line and the safety and the operation stability of the whole power transmission and transformation line.
In the related technology, the chloroprene rubber sealant is adopted as the middle joint sealant of the high-voltage cable, aromatic solvents are used as main raw materials, but the ignition point of the aromatic solvents is lower, the power of a cable line is increased, electronic components are easy to cause fire, and the flame retardance of the sealant is lower.
Disclosure of Invention
In order to improve the flame retardance of the sealant for the intermediate joint of the environment-friendly high-voltage cable, the application provides the sealant for the intermediate joint of the environment-friendly high-voltage cable and a preparation method thereof.
In a first aspect, the application provides a sealant for an intermediate joint of an environment-friendly high-voltage cable, which adopts the following technical scheme: the sealant for the middle joint of the environment-friendly high-voltage cable comprises a prepolymer component and a curing component, wherein the volume ratio of the prepolymer component to the curing component is 1 (1-2); the prepolymer component comprises the following raw materials in parts by weight: 30-50 parts of polyether diol, 6-8 parts of polyether triol, 20-30 parts of 1, 5-naphthalene diisocyanate, 1-2 parts of paranitrobenzoyl chloride, 20-40 parts of inorganic flame retardant, 1-3 parts of 1, 4-cyclohexanedimethanol and 0.3-0.7 part of zinc neodecanoate; the inorganic flame retardant is aluminum hydroxide micro powder;
the curing component comprises the following raw materials in parts by weight: 20-30 parts of m-xylylenediamine, 10-20 parts of a phosphorus flame retardant, 3-7 parts of a paraffin filler, 15-20 parts of diisononyl adipate and 1-3 parts of an organic bismuth catalyst.
In the sealant raw material, the prepolymer component raw materials comprise 30-50 parts of polyether diol, 6-8 parts of polyether triol, 20-30 parts of 1, 5-naphthalene diisocyanate, 1-2 parts of paranitrobenzoyl chloride, 20-40 parts of inorganic flame retardant, 1-3 parts of 1, 4-cyclohexanedimethanol and 0.3-0.7 part of zinc neodecanoate, the curing component raw materials comprise 20-30 parts of m-xylylenediamine, 10-20 parts of phosphorus flame retardant, 3-7 parts of paraffin filler, 15-20 parts of diisononyl adipate and 1-3 parts of organic bismuth catalyst, and various performance indexes of the sealant can be expected; in the prepolymer components, when the raw materials include 40 parts of polyether diol, 7 parts of polyether triol, 25 parts of 1, 5-naphthalene diisocyanate, 1.5 parts of paranitrobenzoyl chloride, 30 parts of inorganic flame retardant, 1.5 parts of 1, 4-cyclohexanedimethanol and 0.5 part of zinc neodecanoate, 25 parts of m-xylylenediamine, 16 parts of phosphorus flame retardant, 3 parts of paraffin filler, 18 parts of diisononyl adipate and 2 parts of organic bismuth catalyst, the sealant has the best effect on various performances.
By adopting the technical scheme, the sealant prepared from the polyether triol and the polyether diol in the prepolymer component has good water resistance, impact resistance and low temperature resistance; in addition, the polyether triol and the polyether diol are added simultaneously, so that the hardness of the sealant is increased, and the tensile strength and the elongation at break of the sealant are improved.
The 1, 5-naphthalene diisocyanate is aromatic isocyanate, has good rigidity, difficult change of molecular chain segment conformation and large intermolecular interaction force, ensures that the sealant is more heat-resistant, has enhanced stability at high temperature and has higher mechanical property. The paranitrobenzoyl chloride is added as a polymerization inhibitor, so that the stability of the prepolymer can be improved while side reaction is inhibited. The aluminum hydroxide micropowder is selected as the inorganic flame retardant, has the advantages of no toxicity, good stability, no generation of toxic gas at high temperature, capability of reducing smoke generation during combustion, capability of improving the flame retardant effect of the sealant, reinforcement effect and contribution to improving the tensile strength and hardness of the sealant. The 1, 4-cyclohexanedimethanol is added as a chain extender and can react with functional groups on the molecular chains of polyether triol, polyether diol and 1, 5-naphthalene diisocyanate to expand the molecular chains and increase the molecular weight, so that the heat resistance and the hardness of the sealant are improved. The zinc neodecanoate is added as a catalyst, so that the reaction activation energy can be reduced, the reaction rate is accelerated, and the side reaction is controlled.
The xylylenediamine in the curing component is added as a curing agent, can be cured at normal temperature, and has high heat resistance and corrosion resistance, and excellent adhesion, alkali resistance and water resistance. By adding the phosphorus flame retardant, when the sealant is heated, the phosphorus flame retardant generates a more stable cross-linked solid substance or carbonized layer structure, and the formation of the carbonized layer can prevent the polymer from further pyrolysis on the one hand and prevent the thermal decomposition product in the carbonized layer from entering a gas phase to participate in a combustion process so as to isolate the external air and heat, thereby achieving the purpose of flame retardance; meanwhile, the phosphorus flame retardant also has the advantages of low smoke, no toxicity, low halogen and the like.
The paraffin filler is a liquid filler, has low volatility and can be well dispersed in the curing component so as to improve the flame retardance and the electrical insulation of the sealant; in addition, the paraffin filler is added, so that the transparency of the sealant is not influenced, and the environmental protection requirement is met. The diisononyl adipate is added as a plasticizer, so that the flexibility and elasticity of the sealant are improved, the sealant is easier to extrude and use, the mechanical property of the sealant is improved, the stability is higher, the smoke generation amount is lower in the processing process, the volatilization loss is relatively less, and the environment-friendly requirement is met; in addition, diisononyl adipate also has a certain flame retardant effect. The organic bismuth catalyst is a high-efficiency environment-friendly catalyst, and the addition of the organic bismuth catalyst can reduce the reaction activation energy, accelerate the reaction rate and improve the mechanical property and hydrolysis resistance stability of the sealant.
Preferably, the method comprises the following steps: the inorganic flame retardant also comprises 5-10 parts of sodium abietate, 1-3 parts of sodium tripolyphosphate, 5-7 parts of tetraphenyl resorcinol diphosphate and 1-3 parts of 2, 6-di-tert-butyl-4-methylphenol.
The inorganic flame retardant is prepared from 20-40 parts of aluminum hydroxide micropowder, 5-10 parts of sodium abietate, 1-3 parts of sodium tripolyphosphate, 5-7 parts of tetraphenyl resorcinol diphosphate and 1-3 parts of 2, 6-di-tert-butyl-4-methylphenol, and various performance indexes of the sealant can be expected; 30 parts of aluminum hydroxide micro powder, 8 parts of sodium abietate, 2 parts of sodium tripolyphosphate, 6 parts of tetraphenyl resorcinol diphosphate and 2 parts of 2, 6-di-tert-butyl-4-methylphenol, and the sealant has the best effect on various performances.
By adopting the technical scheme, the sodium abietate has excellent emulsifying and dispersing properties, and the sodium abietate is used for carrying out surface modification on the aluminum hydroxide micro powder to ensure that the sodium abietate is uniformly adsorbed on the surface of the aluminum hydroxide micro powder so as to increase the particle spacing, prevent the agglomeration among the aluminum hydroxide particles, improve the affinity between the aluminum hydroxide micro powder and the components of the prepolymer, improve the flame retardance of the sealant and improve the shock resistance of the sealant.
The sodium tripolyphosphate can further improve the dispersion uniformity of the sodium abietate, so that the flame retardant effect of the aluminum hydroxide micropowder in the sealant raw material is further improved. The tetraphenyl resorcinol diphosphate and the aluminum hydroxide micropowder are added simultaneously, so that the synergistic effect is achieved, and the flame retardance of the sealant is improved. 2, 6-di-tert-butyl-4-methylphenol is added as a stabilizer, so that the thermal stability of the inorganic flame retardant can be improved.
Preferably, the method comprises the following steps: the weight ratio of the sodium abietate to the aluminum hydroxide micropowder is 1: (4-6).
By adopting the technical scheme, the dispersibility of the aluminum hydroxide micro powder in the prepolymer component can be further improved by adjusting the weight part ratio of the sodium abietate to the aluminum hydroxide micro powder, so that the flame retardance of the sealant is improved.
Preferably, the method comprises the following steps: the phosphorus flame retardant is a mixture of triisopropyl phenyl phosphate and tri (2-chloropropyl) phosphate.
By adopting the technical scheme, the triisopropylphenyl phosphate does not contain halogen, so that the environment is not polluted again; meanwhile, the triisopropylphenyl phosphate is colorless and transparent, and has better intermiscibility, oxygen resistance and thermal stability, namely has flame retardant action and plasticizing action; the tri (2-chloropropyl) phosphate contains phosphorus and chlorine elements simultaneously, has obvious flame retardant property and has the functions of plasticization, moisture resistance and static resistance. Triisopropylphenyl phosphate and tris (2-chloropropyl) phosphate are added simultaneously, so that the flame retardant sealant has a synergistic flame retardant effect, and the flame retardant property and the mechanical property of the sealant are improved.
Preferably, the method comprises the following steps: the weight part ratio of the tris (2-chloropropyl) phosphate to the triisopropylphenyl phosphate is 1: (2-3).
By adopting the technical scheme, the effect of the phosphorus flame retardant can be further improved by adjusting the weight part ratio of the tris (2-chloropropyl) phosphate to the triisopropylphenyl phosphate, so that the flame retardant property of the sealant is improved.
Preferably, the method comprises the following steps: the phosphorus flame retardant comprises the following raw materials in parts by weight: 10-20 parts of triisopropylphenyl phosphate, 5-10 parts of tris (2-chloropropyl) phosphate, 2-8 parts of hydroxypropyl methylcellulose acetate succinate, 2-12 parts of polyisoprene and 0.1-0.3 part of potassium polyacrylate.
The phosphorus flame retardant is prepared from 10-20 parts of triisopropylphenyl phosphate, 5-10 parts of tris (2-chloropropyl) phosphate, 2-8 parts of hydroxypropyl methylcellulose acetate succinate, 2-12 parts of polyisoprene and 0.1-0.3 part of potassium polyacrylate, and various performance indexes of the sealant can be expected; 16 parts of triisopropylphenyl phosphate, 8 parts of tris (2-chloropropyl) phosphate, 6 parts of hydroxypropyl methylcellulose acetate succinate, 2 parts of polyisoprene and 0.2 part of potassium polyacrylate, and the sealant has the best effect on each property.
By adopting the technical scheme, the tris (2-chloropropyl) phosphate and the triisopropylphenyl phosphate are added as capsule cores, so that the capsule has a high flame-retardant effect. Hydroxypropyl methylcellulose acetate succinate and polyisoprene are respectively added as an inner capsule shell and an outer capsule shell, so that the toxicity is low, the viscosity is high, the moldability is high, and the chemical stability and the mechanical property are high, and the hydroxypropyl methylcellulose succinate and the polyisoprene are wrapped on the surfaces of tris (2-chloropropyl) phosphate and triisopropylphenyl phosphate, so that a flame retardant can be protected, the flame retardance can be participated in, and the flame retardance and the water resistance of the tris (2-chloropropyl) phosphate and triisopropylphenyl phosphate are improved.
The addition of potassium polyacrylate can improve the stability of hydroxypropyl methylcellulose acetate succinate and polyisoprene in a solvent.
Preferably, the method comprises the following steps: the phosphorus flame retardant is prepared by the following operation steps:
s1, adding tris (2-chloropropyl) phosphate, triisopropylphenyl phosphate and polyacrylic acid potassium salt into methanol, uniformly mixing, adding hydroxypropyl methyl cellulose acetate succinate, heating to 60-90 ℃ for reacting for 2-4h to enable the hydroxypropyl methyl cellulose acetate succinate to wrap the surfaces of the tris (2-chloropropyl) phosphate and the triisopropylphenyl phosphate, filtering, collecting precipitate, washing, and collecting precipitate A;
s2, adding the precipitate A and the residual potassium polyacrylate salt into the residual methanol, mixing, adding polyisoprene, heating to 60-90 ℃ to react for 2-4h, so that the polyisoprene is coated on the surface of the precipitate A, filtering, collecting the precipitate, washing and drying to obtain the phosphorus-based composite flame retardant;
the dosage of the potassium polyacrylate in the S1 is 40% of the total dosage of the potassium polyacrylate, and the dosage of the methanol is 40% of the total dosage of the methanol.
By adopting the technical method, firstly, the hydroxypropyl methyl cellulose acetate succinate is uniformly coated on the surfaces of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate, and then the polyisoprene is included in the outer layer of the hydroxypropyl methyl cellulose acetate succinate, so that the double-layer coating of the flame retardant is realized, and the flame retardance of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate is further improved; moreover, the preparation method of the phosphorus flame retardant is simple and easy to operate.
Preferably, the method comprises the following steps: the hydroxypropyl methylcellulose acetate succinate accounts for 20-30% of the total volume of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate; the polyisoprene accounts for 20-50% of the total volume of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate.
By adopting the technical method, the dosage of hydroxypropyl methylcellulose acetate succinate and polyisoprene in the total volume of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate is respectively adjusted, so that the capsule shell is uniformly wrapped on the surface of the capsule core, and the flame retardant effect of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate is improved.
In a second aspect, the application provides a preparation method of an environment-friendly high-voltage cable intermediate joint sealant, which is realized by the following specific technical scheme:
a preparation method of an environment-friendly high-voltage cable intermediate joint sealant comprises the following operation steps:
preparation of a prepolymer component: dehydrating polyether dihydric alcohol and polyether trihydric alcohol, adding 1, 5-naphthalene diisocyanate and p-nitrobenzoyl chloride, mixing, dehydrating, adding inorganic flame retardant, 1, 4-cyclohexane dimethanol and zinc neodecanoate, stirring uniformly, and sealing and packaging under the protection of nitrogen to obtain a prepolymer component;
preparation of the curing component: mixing m-xylylenediamine and a paraffin filler, dehydrating, adding an organic bismuth catalyst and a phosphorus flame retardant, uniformly stirring, and hermetically packaging under the protection of nitrogen to obtain a curing component;
and (3) uniformly mixing the prepolymer component and the curing component according to the volume ratio of 1 (1-2) to obtain the environment-friendly sealant for the intermediate joint of the high-voltage cable.
Further, the dehydration condition is 100-120 ℃ and the dehydration is carried out for 1.5-2h under the vacuum condition.
By adopting the technical scheme, the dehydration condition is controlled, the phenomenon that after the prepolymer component and the curing component are mixed, moisture in the prepolymer component reacts with the isocyanate group to consume the isocyanate group, so that the isocyanate group which can react with the polyether triol and the polyether diol is reduced, and the tensile strength and the elongation of the sealant are improved.
In summary, the present application includes at least one of the following beneficial technical effects:
(1) the kind and the mixing amount of the raw materials of the sealant are controlled, so that the limited oxygen index of the sealant is 23.7%, the burning time is 4s, and the volume resistivity, the tensile strength, the elongation at break and the transmittance are respectively 3.94 multiplied by 10-10Omega cm, 1.54MPa, 728 percent and 62.6 percent, has higher flame retardance and mechanical property, and simultaneously keeps the transparency of the sealant.
(2) On the basis of the original raw materials, sodium abietate, sodium tripolyphosphate, tetraphenylresorcinol diphosphate and 2, 6-di-tert-butyl-4-methylphenol are added, and the using amount of the raw materials is adjusted, so that the limiting oxygen index of the sealant is 24.3%, the burning time is 2s, the volume resistivity, the tensile strength, the elongation at break and the transmittance are respectively 3.97 multiplied by 10-10Omega.cm, 1.60MPa, 733 percent and 63.3 percent, and further improves the flame retardance of the sealant.
(3) Triisopropylphenyl phosphate and tris (2-chloropropyl) phosphate are used as phosphorus flame retardants in a compounding manner, and the weight part ratio of triisopropylphenyl phosphate to tris (2-chloropropyl) phosphate is controlled, so that the limited oxygen index of the sealant is 24.5%, and the volume resistivity, the tensile strength, the elongation at break and the transmittance are respectively 4.00 multiplied by 10-10Omega cm, 1.61MPa, 737 percent and 63.5 percent, and improves the flame retardance and the mechanical property of the sealant.
(4) The application adds hydroxypropyl methylcellulose acetate succinate, polyisoprene and potassium polyacrylate on the basis of taking triisopropylphenyl phosphate and tri (2-chloropropyl) phosphate as phosphorus flame retardants, and controls the using amounts of the triisopropylphenyl phosphate and the tri (2-chloropropyl) phosphate to ensure that the limit oxygen index of the sealant is 25.5%, the combustion time is 1s, and the volume resistivity, the tensile strength, the elongation at break and the transmittance are respectively 4.12 multiplied by 10-10Omega, cm, 1.65MPa, 743 percent and 64.0 percent, and further improves the flame retardance of the sealant.
Detailed Description
The present application will be described in further detail with reference to specific examples.
The following raw materials are all commercially available products, and are all sufficient for disclosure of the raw materials in the present application, and should not be construed as limiting the source of the raw materials. The method specifically comprises the following steps: polyether glycol with molecular weight of 3700-3(ii) a Polyether triol with molecular weight of 3000-7000 and density of 1.095g/cm3(ii) a 1, 5-naphthalene diisocyanate with an effective substance content of 99%; the particle size of the aluminum hydroxide micro powder is 800 meshes; 1, 4-cyclohexanedimethanol, the content of effective substances is 98.5%; zinc neodecanoate with an active substance content of 99%; m-xylylenediamine with an effective substance content of 98%; paraffin filler, selected from chlorinated paraffin 52; diisononyl adipate with an active substance content of 99.5%; phosphorus flame retardant, aluminum hypophosphite is selected; organic bismuth catalyst, select iso octanoic acid bismuth; the content of active substances of the sodium abietate is 99.8 percent; sodium tripolyphosphate with an effective substance content of 99%; tetraphenyl resorcinol diphosphate with effective substance content of 98%; 2, 6-di-tert-butyl-4-methylphenol, the content of effective substances is 99 percent; triisopropylphenyl phosphate, the type IPPP; tris (2-chloropropyl) phosphate, type TCPP; hydroxypropyl methylcellulose acetate succinate with the content of effective substances of 99 percent; polyisoprene with an active substance content of 99%; the content of effective substances of the potassium polyacrylate is 99 percent.
Preparation example 1
An inorganic flame retardant is prepared by the following method:
according to the mixing amount shown in the table 1, the aluminum hydroxide micro powder and the sodium abietate are mixed and stirred uniformly, and the sodium tripolyphosphate, the tetraphenyl resorcinol diphosphate and the 2, 6-di-tert-butyl-4-methylphenol are added and mixed uniformly to obtain the inorganic flame retardant.
Preparation examples 2 to 5
The inorganic flame retardants of preparation examples 2 to 5 were completely the same as those of preparation example 1 in the preparation method and the kinds of raw materials, except that: the mixing amount of each raw material is different, and the details are shown in table 1.
TABLE 1 blending amounts (unit: kg) of respective raw materials of inorganic flame retardants of preparation examples 1 to 5
| Raw materials | Preparation example 1 | Preparation example 2 | Preparation example 3 | Preparation example 4 | Preparation example 5 |
| Aluminum hydroxide micropowder | 30 | 30 | 30 | 30 | 30 |
| Rosin acid sodium salt | 8 | 8 | 8 | 8 | 8 |
| Sodium tripolyphosphate | 2 | 2 | 2 | 2 | 2 |
| Tetraphenyl resorcinol diphosphate | 5 | 5.5 | 6 | 6.5 | 7 |
| 2, 6-di-tert-butyl-4-methylphenol | 2 | 2 | 2 | 2 | 2 |
Preparation examples 6 to 9
The inorganic flame retardants of preparation examples 6 to 9 were completely the same as those of preparation example 3 in the preparation method and the kinds of raw materials except that: the mixing amount of each raw material is different, and the details are shown in table 2.
TABLE 2 blending amounts (unit: kg) of respective raw materials of inorganic flame retardants of preparation examples 6 to 9
| Raw materials | Preparation example 6 | Preparation example 7 | Preparation example 8 | Preparation example 9 |
| Aluminum hydroxide micropowder | 20 | 40 | 30 | 30 |
| Rosin acid sodium salt | 5 | 8 | 5 | 10 |
| Sodium tripolyphosphate | 2 | 2 | 2 | 2 |
| Tetraphenyl resorcinol diphosphate | 6 | 6 | 6 | 6 |
| 2, 6-di-tert-butyl-4-methylphenol | 2 | 2 | 2 | 2 |
Preparation example 10
A phosphorus flame retardant is prepared by the following method:
and (3) mixing triisopropylphenyl phosphate and tris (2-chloropropyl) phosphate according to the mixing amount shown in the table 3, and uniformly stirring to obtain the phosphorus flame retardant.
Preparation examples 11 to 12
The phosphorus-based flame retardants of preparation examples 11 to 12 were completely the same as those of preparation example 10 in the preparation method and the kinds of raw materials, except that: the mixing amount of each raw material is different, and the details are shown in table 3.
TABLE 3 blending amounts (unit: kg) of respective raw materials for phosphorus-based flame retardants of preparation examples 10 to 12
Preparation example 13
A phosphorus flame retardant is prepared by the following method:
adding tri (2-chloropropyl) phosphate, triisopropylphenyl phosphate and 0.08kg of polyacrylic acid potassium salt into 10kg of methanol according to the mixing amount shown in the table 4, uniformly mixing, adding hydroxypropyl methyl cellulose acetate succinate, heating to 90 ℃ for reacting for 4 hours to ensure that the hydroxypropyl methyl cellulose acetate succinate is coated on the surfaces of the tri (2-chloropropyl) phosphate and triisopropylphenyl phosphate, filtering, collecting precipitate, washing and collecting precipitate A;
adding the precipitate A and the rest of potassium polyacrylate into 15kg of methanol, mixing, adding polyisoprene, heating to 90 ℃ for reaction for 4h to wrap the polyisoprene on the surface of the precipitate A, filtering, collecting the precipitate, washing and drying to obtain the phosphorus-based composite flame retardant.
Preparation examples 14 to 16
The phosphorus-based flame retardants of preparation examples 14 to 16 were completely the same as those of preparation example 13 in the preparation method and the kinds of raw materials, except that: the mixing amount of each raw material is different, and the details are shown in table 4.
TABLE 4 phosphorus flame retardants of preparation examples 13 to 16 each raw material blending amount (unit: kg)
Preparation examples 17 to 20
The phosphorus-based flame retardants of preparation examples 17 to 20 were completely the same as those of preparation example 14 in the preparation method and the kinds of raw materials, except that: the mixing amount of each raw material is different, and the details are shown in table 5.
TABLE 5 blending amounts (unit: kg) of respective raw materials of phosphorus-based flame retardants of preparation examples 17 to 20
Example 1
The sealant for the middle joint of the environment-friendly high-voltage cable in the embodiment 1 is prepared by the following operation steps:
according to the mixing amount shown in the table 6, the preparation of the prepolymer component: dehydrating polyether diol and polyether triol for 2h at 120 ℃ under a vacuum condition, adding 1, 5-naphthalene diisocyanate and p-nitrobenzoyl chloride for mixing, dehydrating, adding an inorganic flame retardant (aluminum hydroxide micropowder), 1, 4-cyclohexane dimethanol and zinc neodecanoate, stirring uniformly, and sealing and packaging under the protection of nitrogen to obtain a prepolymer component; preparation of the curing component according to the blending amount of table 7: mixing m-xylylenediamine and paraffin filler, dehydrating at 120 deg.C under vacuum for 2 hr, adding organic bismuth catalyst, phosphorus flame retardant (aluminum hypophosphite) and diisononyl adipate, stirring, and sealing and packaging under nitrogen protection to obtain cured component;
and uniformly mixing the prepolymer component and the curing component according to the volume ratio of 1:2 to obtain the environment-friendly sealant for the high-voltage cable intermediate joint.
Examples 2 to 5
The production methods and the types of the raw materials of the sealant for the intermediate joint of the environment-friendly high-voltage cable in the embodiments 2 to 5 are completely the same as those of the sealant in the embodiment 1, except that the mixing amounts of the raw materials are different, and the details are shown in tables 6 and 7.
TABLE 6 examples 1-5 blending amounts (unit: kg) of respective raw materials of the prepolymer components of the sealant for the intermediate joint of the environmentally friendly high voltage cable
| Raw materials | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Polyether glycol | 40 | 40 | 40 | 40 | 40 |
| Polyether triol | 7 | 7 | 7 | 7 | 7 |
| 1, 5-naphthalene diisocyanate | 25 | 25 | 25 | 25 | 25 |
| Paranitrobenzoyl chloride | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
| Inorganic flame retardant | 20 | 25 | 30 | 35 | 40 |
| 1, 4-cyclohexanedimethanol | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
| Zinc neodecanoate | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
TABLE 7 examples 1 to 5 blending amounts (unit: kg) of respective raw materials of curing components of the sealant for the intermediate joint of the environmentally friendly high voltage cable
Examples 6 to 9
The production methods and the types of the raw materials of the environment-friendly high-voltage cable intermediate joint sealants of the embodiments 6 to 9 are completely the same as those of the embodiment 3, except that the mixing amounts of the raw materials of the curing component are different, and the details are shown in table 8.
TABLE 8 examples 6 to 9 blending amounts (unit: kg) of respective raw materials of curing components of the sealant for the intermediate joint of the environmentally friendly high voltage cable
| Raw materials | Example 6 | Example 7 | Example 8 | Example 9 |
| M-xylylenediamine | 25 | 25 | 25 | 25 |
| Phosphorus flame retardant | 16 | 16 | 16 | 16 |
| Filling agent of paraffin | 4 | 5 | 6 | 7 |
| Adipic acid diisononyl ester | 18 | 18 | 18 | 18 |
| Organic bismuth catalyst | 2 | 2 | 2 | 2 |
Examples 10 to 18
The production methods and the raw material mixing amounts of the environment-friendly high-voltage cable intermediate joint sealants of the embodiments 10 to 18 are completely the same as those of the embodiment 7, except that the inorganic flame retardant prepared in the preparation examples 1 to 9 is selected as the inorganic flame retardant, and the types and the mixing amounts of the other raw materials are completely the same as those of the embodiment 7.
Examples 19 to 29
The sealants for environment-friendly high-voltage cable intermediate joints of examples 19 to 29 were completely the same as those of example 16 in terms of production method and raw material mixing amount, except that the inorganic flame retardant prepared in preparation examples 10 to 20 was used as the inorganic flame retardant, and the types and mixing amounts of the remaining raw materials were completely the same as those of example 16.
Comparative example 1
The sealant for the middle joint of the environment-friendly high-voltage cable in the comparative example 1 is completely the same as the preparation method in the example 1, and the difference is that: the inorganic flame retardant (aluminum hydroxide micropowder) is replaced by red phosphorus in the sealant raw material for the environment-friendly high-voltage cable intermediate joint, and the other raw materials and the mixing amount are the same as those in the example 1.
Comparative example 2
The sealant for the middle joint of the environment-friendly high-voltage cable in the comparative example 2 is completely the same as the preparation method in the example 1, and the difference is that: the phosphorus flame retardant is replaced by the halogen flame retardant in the sealant raw materials for the environment-friendly high-voltage cable intermediate joint, and the rest raw materials and the mixing amount are the same as those in the example 1.
Performance detection
The following test standards or methods were used to test the performance of each of examples 1-29 and comparative examples 1-2, and the results are shown in Table 9.
Limiting oxygen index: according to the GB/T10707-2008 'determination of rubber combustion performance' standard, a sample to be tested is manufactured into a sample strip with the length of 130mm, the width of 13mm and the thickness of 3mm, and after the sample is maintained for 7 days under the conditions of the temperature of 23 ℃ and the humidity of 50%, an oxygen index tester is adopted to test the limited oxygen index of the sealant.
Flaming combustion time after application of flame: according to the standard of GB/T2408-1996 'determination of rubber burning performance', a sample to be tested is prepared into a sample strip with the length of 130mm, the width of 13mm and the thickness of 3mm, and after the sample is maintained for 7 days under the conditions of the temperature of 23 ℃ and the humidity of 50%, an oxygen index tester is adopted to test the flaming burning time of the sealant after flame application.
Combustion grade: and (3) measuring the combustion grade of the sealant according to GB/T2408-1996 plastic combustion performance test method.
Volume resistivity: and (4) measuring the volume resistivity of the sealant according to GB/T1410-2006 test method for the volume resistivity and the surface resistivity of the solid insulating material.
Tensile strength, elongation at break: and (3) measuring the tensile strength and the elongation of the sealant according to GB/T19250-2013 polyurethane waterproof paint.
Transmittance: and controlling the thickness of the test to be 3mm, and detecting the transmittance of the sealant by adopting a spectrophotometer.
TABLE 9 Performance test results for different sealants
The detection results in Table 9 show that the limited oxygen index of the sealant obtained by the applicationThe highest number is 25.5%, the burning time is 1s, and the burning grades of the sealant obtained by the method are all 0 grade, so that the flame retardant property of the sealant is improved; in addition, the volume resistivity, the tensile strength, the elongation at break and the transparency of the sealant obtained by the application are respectively 4.12 multiplied by 10 at most-10Omega cm, 1.65MPa, 743 percent and 64.0 percent, has excellent mechanical property and insulating property, and simultaneously keeps the transparency of the sealant.
In examples 1-5, the limiting oxygen index of the sealant of example 3 was 23.7%, which is higher than that of examples 1-2 and examples 4-5, and the burning time of the sealant of example 3 was 4 seconds, which is shorter than that of the sealants of examples 1-2 and examples 4-5, improving the flame retardancy of the sealant; in addition, the volume resistivity, tensile strength and elongation at break of the sealant of example 3 were 3.94X 10, respectively-10And omega.cm, 1.54MPa and 728 percent are higher than those of the embodiments 1-2 and 4-5, so that the insulativity and the mechanical property of the sealant are improved. The results show that the inorganic flame retardant in the sealant prepolymer component of example 3 and the phosphorus flame retardant in the curing component are appropriate in parts by weight, and the flame retardance of the sealant is improved. Possibly in connection with both inorganic flame retardants and phosphorus based flame retardants to improve the flame retardancy of the sealant.
In examples 6-9, the limiting oxygen index of the sealant of example 7 was 23.9%, which is higher than that of examples 6 and 8-9, and the burning time of the sealant of example 7 was 3 seconds, which is shorter than that of the sealants of examples 6 and 8-9, improving the flame retardancy of the sealants; in addition, the volume resistivity, tensile strength, elongation at break and transmittance of the sealant of example 7 were 3.95X 10-10And the omega.cm, the 1.56MPa, the 730 percent and the 62.7 percent are higher than those of the embodiment 6 and the embodiments 8-9, so that the insulation property and the mechanical property of the sealant are improved. It is shown that the paraffin wax filler of the sealant pre-cure component of example 7 is in the right amount by weight to improve the flame retardancy of the sealant. Possibly in connection with a good dispersion of the paraffin-based filler in the curing component to improve the flame retardancy and electrical insulation of the sealant.
In examples 10-14, the limiting oxygen index of the sealant of example 12 was 24.0% higher than that of examples 10-11 and examples 13-14, to provideThe flame retardance of the sealant is improved; in addition, the volume resistivity, tensile strength, elongation at break and transmittance of the sealant of example 7 were 3.96X 10-10And the omega.cm, the 1.58MPa, the 731 percent and the 62.9 percent are higher than those of the examples 10-11 and the examples 13-14, so that the insulation property and the mechanical property of the sealant are improved. The sealant of example 12 was shown to have improved flame retardancy due to the appropriate parts by weight of tetraphenylresorcinol diphosphate. Probably, the tetraphenyl resorcinol diphosphate and the aluminum hydroxide micropowder are added simultaneously, so that the synergistic effect is achieved, and the flame retardance of the sealant is improved.
In examples 15-18, the limiting oxygen index of the sealant of example 16 was 24.3%, which is higher than that of examples 15 and 17-18, and the burning time of the sealant of example 16 was 2 seconds, which is shorter than that of the sealants of examples 15 and 17-18, improving the flame retardancy of the sealant; in addition, the volume resistivity, tensile strength, elongation at break and transmittance of the sealant of example 16 were 3.97X 10-10And the omega.cm, the 1.60MPa, the 733 percent and the 63.3 percent are higher than those of the embodiment 15 and the embodiments 17 to 18, so that the insulation property and the mechanical property of the sealant are improved. The weight ratio of the sodium abietate to the aluminum hydroxide micropowder in the sealant pre-inorganic flame retardant of the embodiment 16 is shown to be 1:5, which is more suitable for improving the flame retardance of the sealant. Probably related to the fact that sodium abietate can carry out surface modification on the aluminum hydroxide micro powder, so that the sodium abietate is uniformly adsorbed on the surface of the aluminum hydroxide micro powder, the affinity between the aluminum hydroxide micro powder and the prepolymer component is improved, and the flame retardance of the sealant is improved.
In examples 19-21, the limiting oxygen index of the sealant in example 20 was 24.5%, which is higher than that of examples 19 and 21, improving the flame retardancy of the sealant; in addition, the volume resistivity, tensile strength, elongation at break and transmittance of the sealant of example 20 were 4.00X 10-10Omega cm, 1.61MPa, 737% and 63.5% are all higher than those in examples 19 and 21, and the insulating property and the mechanical property of the sealant are improved. The results show that the phosphorus flame retardant of the sealant in the example 20 has proper weight parts of triisopropylphenyl phosphate and tri (2-chloropropyl) phosphate, and the flame retardance of the sealant is improvedIt is also good. Possibly, the tri-isopropyl phenyl phosphate and the tri (2-chloropropyl) phosphate are added simultaneously, and the synergistic flame retardant effect is realized.
In examples 22-25, the limiting oxygen index of the sealant of example 23 was 25.1%, which is higher than that of examples 22 and 24-25, and the burning time of the sealant of example 23 was 1s, which is shorter than that of the sealants of examples 22 and 24-25, improving the flame retardancy of the sealant; in addition, the volume resistivity, tensile strength, elongation at break and transmittance of the sealant of example 23 were 4.05X 10-10And the omega.cm, the 1.62MPa, the 740 percent and the 63.7 percent are higher than those of the embodiment 22 and the embodiments 24-25, so that the insulation property and the mechanical property of the sealant are improved. The result shows that the hydroxypropyl methylcellulose acetate succinate in the sealant in the embodiment 23 is more appropriate in an amount of 25% of the total amount of the tris (2-chloropropyl) phosphate and the triisopropylphenyl phosphate, so that the flame retardance of the sealant is improved. Possibly related to the adjustment of the dosage of hydroxypropyl methylcellulose acetate succinate in the total volume of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate, the uniform coating of the capsule shell on the surface of the capsule core, and the improvement of the flame retardant effect of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate.
In examples 26-29, the limiting oxygen index of the sealant of example 27 was 25.5%, which is higher than that of examples 26 and examples 28-29, improving the flame retardancy of the sealant; in addition, the volume resistivity, tensile strength, elongation at break and transmittance of the sealant of example 27 were 4.12X 10-10Omega.cm, 1.65MPa, 743 percent and 64.0 percent are higher than those of the embodiment 26 and the embodiments 28-29, and the insulating property and the mechanical property of the sealant are improved. It is shown that the sealant of example 27, polyisoprene, accounted for 35% of the total amount of tris (2-chloropropyl) phosphate and triisopropylphenyl phosphate, improved the flame retardancy of the sealant. Probably related to the adjustment of the dosage of polyisoprene in the total volume of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate, the uniform coating of the capsule shell on the surface of the capsule core and the improvement of the flame retardant effect of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate.
The performance detection data of the sealants of the comparative examples 1-2 and the example 1 show that the flame retardance of the sealant is improved to different degrees by adding the aluminum hydroxide micropowder and the phosphorus flame retardant into the raw material of the sealant.
The specific embodiments are only for explaining the present application and are not limiting to the present application, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The environment-friendly sealant for the intermediate joint of the high-voltage cable is characterized by comprising a prepolymer component and a curing component, wherein the volume ratio of the prepolymer component to the curing component is 1 (1-2); the prepolymer component comprises the following raw materials in parts by weight: 30-50 parts of polyether diol, 6-8 parts of polyether triol, 20-30 parts of 1, 5-naphthalene diisocyanate, 1-2 parts of paranitrobenzoyl chloride, 20-40 parts of inorganic flame retardant, 1-3 parts of 1, 4-cyclohexanedimethanol and 0.3-0.7 part of zinc neodecanoate; the inorganic flame retardant is aluminum hydroxide micro powder;
the curing component comprises the following raw materials in parts by weight: 20-30 parts of m-xylylenediamine, 10-20 parts of a phosphorus flame retardant, 3-7 parts of a paraffin filler, 15-20 parts of diisononyl adipate and 1-3 parts of an organic bismuth catalyst.
2. The sealant for the intermediate joint of the environment-friendly high-voltage cable according to claim 1, which is characterized in that: the inorganic flame retardant also comprises 5-10 parts of sodium abietate, 1-3 parts of sodium tripolyphosphate, 5-7 parts of tetraphenyl resorcinol diphosphate and 1-3 parts of 2, 6-di-tert-butyl-4-methylphenol.
3. The sealant for the intermediate joint of the environment-friendly high-voltage cable according to claim 2, wherein: the weight ratio of the sodium abietate to the aluminum hydroxide micropowder is 1: (4-6).
4. The sealant for the intermediate joint of the environment-friendly high-voltage cable according to claim 2, wherein: the phosphorus flame retardant is a mixture of triisopropylphenyl phosphate and tris (2-chloropropyl) phosphate.
5. The sealant for the intermediate joint of the environment-friendly high-voltage cable according to claim 4, wherein: the weight part ratio of the tri (2-chloropropyl) phosphate to the triisopropylphenyl phosphate is 1: (2-3).
6. The environment-friendly sealant for the intermediate joint of the high-voltage cable as claimed in claim 2, wherein the phosphorus flame retardant comprises the following raw materials in parts by weight: 10-20 parts of triisopropylphenyl phosphate, 5-10 parts of tris (2-chloropropyl) phosphate, 2-8 parts of hydroxypropyl methylcellulose acetate succinate, 2-12 parts of polyisoprene and 0.1-0.3 part of potassium polyacrylate; the phosphorus flame retardant is a phosphorus flame retardant with a flame-retardant microcapsule structure, wherein hydroxypropyl methylcellulose acetate succinate and polyisoprene are sequentially used as capsule shells to be wrapped on the surfaces of triisopropylphenyl phosphate and tris (2-chloropropyl) phosphate.
7. The sealant for the middle joint of the environment-friendly high-voltage cable as claimed in claim 6, wherein the phosphorus-based flame retardant is prepared by the following steps:
s1, adding tris (2-chloropropyl) phosphate, triisopropylphenyl phosphate and polyacrylic acid potassium salt into methanol, uniformly mixing, adding hydroxypropyl methyl cellulose acetate succinate, heating to 60-90 ℃ for reacting for 2-4h to enable the hydroxypropyl methyl cellulose acetate succinate to wrap the surfaces of the tris (2-chloropropyl) phosphate and the triisopropylphenyl phosphate, filtering, collecting precipitate, washing, and collecting precipitate A;
s2, adding the precipitate A and the residual potassium polyacrylate salt into the residual methanol, mixing, adding polyisoprene, heating to 60-90 ℃ to react for 2-4h, so that the polyisoprene is coated on the surface of the precipitate A, filtering, collecting the precipitate, washing and drying to obtain the phosphorus-based composite flame retardant;
the dosage of the potassium polyacrylate in the S1 is 40% of the total dosage of the potassium polyacrylate.
8. The sealant for the intermediate joint of the environment-friendly high-voltage cable according to claim 7, wherein: the hydroxypropyl methylcellulose acetate succinate accounts for 20-30% of the total amount of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate; the polyisoprene accounts for 20-50% of the total amount of the tri (2-chloropropyl) phosphate and the triisopropylphenyl phosphate.
9. A method for preparing the sealant for the intermediate joint of the environment-friendly high-voltage cable according to any one of claims 1 to 8, which comprises the following steps:
preparation of a prepolymer component: dehydrating polyether dihydric alcohol and polyether trihydric alcohol, adding 1, 5-naphthalene diisocyanate and p-nitrobenzoyl chloride, mixing, dehydrating, adding inorganic flame retardant, 1, 4-cyclohexane dimethanol and zinc neodecanoate, stirring uniformly, and sealing and packaging under the protection of nitrogen to obtain a prepolymer component;
preparation of the curing component: mixing m-xylylenediamine and a paraffin filler, dehydrating, adding an organic bismuth catalyst and a phosphorus flame retardant, uniformly stirring, and hermetically packaging under the protection of nitrogen to obtain a curing component;
and (3) uniformly mixing the prepolymer component and the curing component according to the volume ratio of 1 (1-2) to obtain the environment-friendly sealant for the intermediate joint of the high-voltage cable.
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| CN202210358758.7A CN114656916A (en) | 2022-04-02 | 2022-04-02 | Sealant for environment-friendly high-voltage cable intermediate joint and preparation method thereof |
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| CN202210358758.7A CN114656916A (en) | 2022-04-02 | 2022-04-02 | Sealant for environment-friendly high-voltage cable intermediate joint and preparation method thereof |
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