CN115895143B - Impact-resistant high-temperature-resistant PVC pipe and production process thereof - Google Patents
Impact-resistant high-temperature-resistant PVC pipe and production process thereof Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 51
- 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 29
- 239000003063 flame retardant Substances 0.000 claims abstract description 29
- 239000002131 composite material Substances 0.000 claims abstract description 21
- 239000000314 lubricant Substances 0.000 claims abstract description 19
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 15
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000001038 titanium pigment Substances 0.000 claims abstract description 5
- 230000035939 shock Effects 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 54
- 239000000243 solution Substances 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 239000008367 deionised water Substances 0.000 claims description 30
- 229910021641 deionized water Inorganic materials 0.000 claims description 30
- 239000011159 matrix material Substances 0.000 claims description 26
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 24
- 239000007864 aqueous solution Substances 0.000 claims description 20
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 229920002125 Sokalan® Polymers 0.000 claims description 14
- 239000004584 polyacrylic acid Substances 0.000 claims description 14
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 13
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 12
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims description 12
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 12
- 229960001149 dopamine hydrochloride Drugs 0.000 claims description 12
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 5
- 239000007983 Tris buffer Substances 0.000 claims description 5
- 239000006185 dispersion Substances 0.000 claims description 5
- 239000012065 filter cake Substances 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 239000008117 stearic acid Substances 0.000 claims description 5
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 claims 1
- 239000010954 inorganic particle Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000004800 polyvinyl chloride Substances 0.000 description 37
- 229920000915 polyvinyl chloride Polymers 0.000 description 36
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- 229920001690 polydopamine Polymers 0.000 description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 229910001424 calcium ion Inorganic materials 0.000 description 4
- 238000004821 distillation Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 229910000000 metal hydroxide Inorganic materials 0.000 description 2
- 150000004692 metal hydroxides Chemical class 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- IQFVPQOLBLOTPF-HKXUKFGYSA-L congo red Chemical compound [Na+].[Na+].C1=CC=CC2=C(N)C(/N=N/C3=CC=C(C=C3)C3=CC=C(C=C3)/N=N/C3=C(C4=CC=CC=C4C(=C3)S([O-])(=O)=O)N)=CC(S([O-])(=O)=O)=C21 IQFVPQOLBLOTPF-HKXUKFGYSA-L 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 239000012796 inorganic flame retardant Substances 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Abstract
The invention discloses an impact-resistant high-temperature-resistant PVC pipe and a production process thereof, wherein the impact-resistant high-temperature-resistant PVC pipe comprises the following raw materials in parts by weight: 75-100 parts of PVC resin, 12-18 parts of modified particles, 6-8 parts of calcium zinc heat stabilizer, 2-5 parts of titanium dioxide and 0.5-1.2 parts of composite lubricant; mixing PVC tree with modified particles, and sequentially adding a calcium zinc heat stabilizer, titanium pigment and a composite lubricant to prepare a mixture; extruding in an extruder to obtain extruded material, shaping, cooling and cutting to obtain impact-resistant high-temperature-resistant PVC pipe; the performance of the PVC pipe is improved by adding the modified particles, so that the technical problems that inorganic particles are often added for improving the high temperature resistance and the shock resistance of the PVC pipe in the current market, but the compatibility of the inorganic particles and organisms is poor, so that the mechanical property of the material is reduced, and the flame retardant effect cannot be brought to the material by simply adding the inorganic particles, and the PVC pipe cannot be used in the special field are solved.
Description
Technical Field
The invention belongs to the technical field, and particularly relates to an impact-resistant high-temperature-resistant PVC pipe and a production process thereof.
Background
Polyvinyl chloride (PVC) for short is a universal plastic, has very wide application, and is widely applied to the aspects of building materials, industrial products, daily necessities, floor leathers, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, fibers and the like.
The pipe prepared from the polyvinyl chloride material has the characteristics of light dead weight, corrosion resistance, high compressive strength, good electrical insulation performance, safety, convenience and the like, is widely applied to the fields of drain pipes, water supply pipes, electric wire pipes, cable protective sleeves and the like, and is a plastic pipe with the application range being inferior to that of polyethylene; however, with the rapid development of the technology level, the performance requirements on the PVC pipe are increasingly high; the mode of adding inorganic particles is often adopted in order to improve the high temperature resistance and the shock resistance of PVC pipes in the current market, but the compatibility of the inorganic particles and organisms is poor, so that the mechanical property of the materials is reduced, and the flame retardant effect cannot be brought to the materials even if the inorganic particles are simply added, so that the PVC pipes cannot be used in the special field.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention aims to provide an impact-resistant high-temperature-resistant PVC pipe and a production process thereof.
The aim of the invention can be achieved by the following technical scheme:
an impact-resistant high-temperature-resistant PVC pipe comprises the following raw materials in parts by weight: 75-100 parts of PVC resin, 12-18 parts of modified particles, 6-8 parts of calcium zinc heat stabilizer, 2-5 parts of titanium dioxide and 0.5-1.2 parts of composite lubricant;
the anti-impact high-temperature-resistant PVC pipe comprises the following steps:
firstly, mixing a PVC tree and modified particles, uniformly stirring at a rotating speed of 150-200r/min, sequentially adding a calcium zinc heat stabilizer, titanium pigment and a composite lubricant, and stirring at a rotating speed of 200-300r/min for 10-15min to obtain a mixture;
and secondly, feeding the mixture into an extruder, extruding to obtain an extruded material, shaping, cooling and cutting to obtain the impact-resistant high-temperature-resistant PVC pipe.
Further, in the second step, the temperature of the extruder head was controlled to 175-185 ℃, 185-195 ℃ and 195-210 ℃ respectively, and the drawing speed was controlled to 0.6m/min.
Further, the composite lubricant is formed by mixing polyethylene wax and stearic acid according to the weight ratio of 1:1.
Further, the modified particles are prepared by the following steps:
step S1, respectively adding an equal volume of polyacrylic acid aqueous solution with the concentration of 1g/L into a sodium carbonate solution with the concentration of 0.1mol/L and a calcium chloride solution with the concentration of 0.1mol/L, and uniformly stirring for 20min to form a solution a and a solution b; transferring the solution a into a three-neck flask, adding a 10mmol/L sodium dodecyl sulfate aqueous solution, heating to 80 ℃, uniformly stirring and reacting for 30min, adding the solution b after the reaction is finished, uniformly stirring and reacting for 1h at a rotating speed of 250r/min, vacuum-pumping and filtering after the reaction is finished, respectively washing a filter cake with deionized water and absolute ethyl alcohol for three times, transferring into a 100 ℃ drying box, and drying for 8h to obtain a porous matrix, wherein the dosage ratio of the polyacrylic acid aqueous solution, the sodium carbonate solution, the calcium chloride solution and the sodium dodecyl sulfate aqueous solution is 50 mL/100 mL/50 mL;
in the step S1, calcium carbonate precipitate is generated through the reaction of sodium carbonate and calcium chloride, sodium dodecyl sulfate and polyacrylic acid are added as crystal form regulating agents, a porous matrix is prepared, the porous matrix is porous calcium carbonate, the sodium dodecyl sulfate and the polyacrylic acid are blended to form a composite micelle, an electrostatic effect is generated on calcium ions, and internal calcium ions are diffused from a nano pore canal through a solution diffusion effect to form a mesoporous structure of an internal cavity.
S2, adding 1-hydroxyethylidene-1, 1-diphosphonic acid into deionized water, stirring at a constant speed until the 1-hydroxyethylidene-1, 1-diphosphonic acid is dissolved, adding aluminum hydroxide, heating to 100 ℃, carrying out heat preservation reaction for 10 hours, carrying out reduced pressure distillation, and carrying out vacuum drying to obtain flame-retardant particles, wherein the dosage ratio of the 1-hydroxyethylidene-1, 1-diphosphonic acid, the aluminum hydroxide and the deionized water is controlled to be 0.05-1 mol:0.1-0.2 mol:500 mL;
in the step S2, the 1-hydroxyethylidene-1, 1-diphosphonic acid reacts with aluminum hydroxide to generate flame-retardant particles, and the flame-retardant particles are endowed with excellent flame-retardant performance through the synergistic flame-retardant effect of the organic phosphoric acid and the metal hydroxide on the one hand and can improve the compatibility with organisms on the other hand through compositing the organic phosphoric acid and the metal hydroxide.
And S3, adding the porous matrix into deionized water, stirring at a constant speed for 30min to obtain dispersion, adding dopamine hydrochloride, continuously stirring for 10min, adding Tris buffer solution to adjust pH until pH=8.5, heating to 40 ℃, adding flame-retardant particles after stirring at a constant speed for 12h, continuously stirring for 10h, filtering, washing with deionized water, and drying to obtain modified particles, wherein the dosage ratio of the porous matrix to the dopamine hydrochloride to the flame-retardant particles to the deionized water is controlled to be 10-15 g:3-5 g:0.1-0.3 g:1000 mL.
In the step S3, dopamine hydrochloride is polymerized on the surface of a porous matrix under an alkaline condition to form polydopamine, the generation sites of polydopamine are increased through the ultrahigh specific surface area of the porous matrix, then flame-retardant particles are added, the flame-retardant particles are attached to the porous matrix structure through polydopamine, and the excellent flame-retardant performance of the prepared PVC pipe is endowed while toughening is realized.
A production process of an impact-resistant and high-temperature-resistant PVC pipe comprises the following steps:
firstly, mixing a PVC tree and modified particles, uniformly stirring at a rotating speed of 150-200r/min, sequentially adding a calcium zinc heat stabilizer, titanium pigment and a composite lubricant, and stirring at a rotating speed of 200-300r/min for 10-15min to obtain a mixture;
and secondly, feeding the mixture into an extruder, extruding to obtain an extruded material, shaping, cooling and cutting to obtain the impact-resistant high-temperature-resistant PVC pipe.
The invention has the beneficial effects that:
according to the invention, PVC resin is used as a matrix, the performance of the PVC pipe is improved by adding modified particles, calcium carbonate precipitation is generated by the reaction of sodium carbonate and calcium chloride in the preparation process of the modified particles, sodium dodecyl sulfate and polyacrylic acid are added as crystal form regulating agents, a porous matrix is prepared, the porous matrix is porous calcium carbonate, the sodium dodecyl sulfate and the polyacrylic acid are blended to form a composite micelle, static effect is generated on calcium ions, internal calcium ions are diffused from a nano pore canal through solution diffusion to form a mesoporous structure of an internal cavity, then a flame-retardant particle is synthesized, dopamine hydrochloride is polymerized on the surface of the porous matrix to form polydopamine, the generation site of the polydopamine is increased through the ultrahigh specific surface area of the porous matrix, then flame-retardant particles are added, the flame-retardant particles are attached to the porous matrix structure through polydopamine, and excellent flame retardant performance is endowed to the prepared PVC pipe while the shock resistance and the high temperature resistance are improved, and the requirements of some special fields are met.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The modified particles are prepared by the following steps:
step S1, respectively adding an equal volume of polyacrylic acid aqueous solution with the concentration of 1g/L into a sodium carbonate solution with the concentration of 0.1mol/L and a calcium chloride solution with the concentration of 0.1mol/L, and uniformly stirring for 20min to form a solution a and a solution b; transferring the solution a into a three-neck flask, adding a 10mmol/L sodium dodecyl sulfate aqueous solution, heating to 80 ℃, uniformly stirring and reacting for 30min, adding the solution b after the reaction is finished, uniformly stirring and reacting for 1h at a rotating speed of 250r/min, vacuum-pumping and filtering after the reaction is finished, respectively washing a filter cake with deionized water and absolute ethyl alcohol for three times, transferring into a 100 ℃ drying box, and drying for 8h to obtain a porous matrix, wherein the dosage ratio of the polyacrylic acid aqueous solution, the sodium carbonate solution, the calcium chloride solution and the sodium dodecyl sulfate aqueous solution is 50 mL/100 mL/50 mL;
s2, adding 1-hydroxyethylidene-1, 1-diphosphonic acid into deionized water, stirring at a constant speed until the 1-hydroxyethylidene-1, 1-diphosphonic acid is dissolved, adding aluminum hydroxide, heating to 100 ℃, carrying out heat preservation reaction for 10 hours, carrying out reduced pressure distillation, and carrying out vacuum drying to obtain flame-retardant particles, wherein the dosage ratio of the 1-hydroxyethylidene-1, 1-diphosphonic acid, the aluminum hydroxide and the deionized water is controlled to be 0.05 mol:0.1 mol:500 mL;
and S3, adding the porous matrix into deionized water, stirring at a constant speed for 30min to obtain dispersion, adding dopamine hydrochloride, continuously stirring for 10min, adding Tris buffer solution to adjust pH until pH=8.5, heating to 40 ℃, adding flame-retardant particles after stirring at a constant speed for 12h, continuously stirring for 10h, filtering, washing with deionized water, and drying to obtain modified particles, wherein the dosage ratio of the porous matrix to the dopamine hydrochloride to the flame-retardant particles to the deionized water is controlled to be 10 g:3 g:0.1 g:1000 mL.
Example 2
The modified particles are prepared by the following steps:
step S1, respectively adding an equal volume of polyacrylic acid aqueous solution with the concentration of 1g/L into a sodium carbonate solution with the concentration of 0.1mol/L and a calcium chloride solution with the concentration of 0.1mol/L, and uniformly stirring for 20min to form a solution a and a solution b; transferring the solution a into a three-neck flask, adding a 10mmol/L sodium dodecyl sulfate aqueous solution, heating to 80 ℃, uniformly stirring and reacting for 30min, adding the solution b after the reaction is finished, uniformly stirring and reacting for 1h at a rotating speed of 250r/min, vacuum-pumping and filtering after the reaction is finished, respectively washing a filter cake with deionized water and absolute ethyl alcohol for three times, transferring into a 100 ℃ drying box, and drying for 8h to obtain a porous matrix, wherein the dosage ratio of the polyacrylic acid aqueous solution, the sodium carbonate solution, the calcium chloride solution and the sodium dodecyl sulfate aqueous solution is 50 mL/100 mL/50 mL;
s2, adding 1-hydroxyethylidene-1, 1-diphosphonic acid into deionized water, stirring at a constant speed until the 1-hydroxyethylidene-1, 1-diphosphonic acid is dissolved, adding aluminum hydroxide, heating to 100 ℃, carrying out heat preservation reaction for 10 hours, carrying out reduced pressure distillation, and carrying out vacuum drying to obtain flame-retardant particles, wherein the dosage ratio of the 1-hydroxyethylidene-1, 1-diphosphonic acid, the aluminum hydroxide and the deionized water is controlled to be 0.08 mol:0.15 mol:500 mL;
and S3, adding the porous matrix into deionized water, stirring at a constant speed for 30min to obtain dispersion, adding dopamine hydrochloride, continuously stirring for 10min, adding Tris buffer solution to adjust pH until pH=8.5, heating to 40 ℃, adding flame-retardant particles after stirring at a constant speed for 12h, continuously stirring for 10h, filtering, washing with deionized water, and drying to obtain modified particles, wherein the dosage ratio of the porous matrix to the dopamine hydrochloride to the flame-retardant particles to the deionized water is controlled to be 12 g:4 g:0.2 g:1000 mL.
Example 3
The modified particles are prepared by the following steps:
step S1, respectively adding an equal volume of polyacrylic acid aqueous solution with the concentration of 1g/L into a sodium carbonate solution with the concentration of 0.1mol/L and a calcium chloride solution with the concentration of 0.1mol/L, and uniformly stirring for 20min to form a solution a and a solution b; transferring the solution a into a three-neck flask, adding a 10mmol/L sodium dodecyl sulfate aqueous solution, heating to 80 ℃, uniformly stirring and reacting for 30min, adding the solution b after the reaction is finished, uniformly stirring and reacting for 1h at a rotating speed of 250r/min, vacuum-pumping and filtering after the reaction is finished, respectively washing a filter cake with deionized water and absolute ethyl alcohol for three times, transferring into a 100 ℃ drying box, and drying for 8h to obtain a porous matrix, wherein the dosage ratio of the polyacrylic acid aqueous solution, the sodium carbonate solution, the calcium chloride solution and the sodium dodecyl sulfate aqueous solution is 50 mL/100 mL/50 mL;
s2, adding 1-hydroxyethylidene-1, 1-diphosphonic acid into deionized water, stirring at a constant speed until the 1-hydroxyethylidene-1, 1-diphosphonic acid is dissolved, adding aluminum hydroxide, heating to 100 ℃, carrying out heat preservation reaction for 10 hours, carrying out reduced pressure distillation, and carrying out vacuum drying to obtain flame-retardant particles, wherein the dosage ratio of the 1-hydroxyethylidene-1, 1-diphosphonic acid, the aluminum hydroxide and the deionized water is controlled to be 1 mol:0.2 mol:500 mL;
and S3, adding the porous matrix into deionized water, uniformly stirring for 30min to obtain dispersion, adding dopamine hydrochloride, continuously stirring for 10min, adding Tris buffer solution to adjust pH until pH=8.5, heating to 40 ℃, adding flame-retardant particles after uniformly stirring for 12h, continuously stirring for 10h, filtering, washing with deionized water, and drying to obtain modified particles, wherein the dosage ratio of the porous matrix to the dopamine hydrochloride to the flame-retardant particles to the deionized water is controlled to be 15 g:5 g:0.3 g:1000 mL.
Example 4
An impact-resistant high-temperature-resistant PVC pipe comprises the following raw materials in parts by weight: 75 parts of PVC resin, 12 parts of modified particles prepared in example 1, 6 parts of calcium zinc heat stabilizer, 2 parts of titanium dioxide and 0.5 part of composite lubricant;
the anti-impact high-temperature-resistant PVC pipe comprises the following steps:
firstly, uniformly stirring PVC tree and modified particles at a rotating speed of 150r/min, sequentially adding a calcium zinc heat stabilizer, titanium dioxide and a composite lubricant, and stirring at a rotating speed of 200r/min for 10min to obtain a mixture;
and secondly, feeding the mixture into an extruder, extruding to obtain an extruded material, shaping, cooling and cutting to obtain the impact-resistant high-temperature-resistant PVC pipe.
Further, in the second step, the temperature of the extruder head was controlled to 175-185 ℃, 185-195 ℃ and 195-210 ℃ respectively, and the drawing speed was controlled to 0.6m/min.
The composite lubricant is formed by mixing polyethylene wax and stearic acid according to the weight ratio of 1:1.
Example 5
An impact-resistant high-temperature-resistant PVC pipe comprises the following raw materials in parts by weight: 85 parts of PVC resin, 15 parts of modified particles prepared in example 2, 7 parts of calcium zinc heat stabilizer, 4 parts of titanium dioxide and 0.8 part of composite lubricant;
the anti-impact high-temperature-resistant PVC pipe comprises the following steps:
firstly, uniformly stirring PVC tree and modified particles at a rotating speed of 180r/min, sequentially adding a calcium zinc heat stabilizer, titanium dioxide and a composite lubricant, and stirring at a rotating speed of 250r/min for 12min to obtain a mixture;
and secondly, feeding the mixture into an extruder, extruding to obtain an extruded material, shaping, cooling and cutting to obtain the impact-resistant high-temperature-resistant PVC pipe.
Further, in the second step, the temperature of the extruder head was controlled to 175-185 ℃, 185-195 ℃ and 195-210 ℃ respectively, and the drawing speed was controlled to 0.6m/min.
The composite lubricant is formed by mixing polyethylene wax and stearic acid according to the weight ratio of 1:1.
Example 6
An impact-resistant high-temperature-resistant PVC pipe comprises the following raw materials in parts by weight: 100 parts of PVC resin, 18 parts of modified particles prepared in example 3, 8 parts of calcium zinc heat stabilizer, 5 parts of titanium dioxide and 1.2 parts of composite lubricant;
the anti-impact high-temperature-resistant PVC pipe comprises the following steps:
firstly, uniformly stirring PVC tree and modified particles at a rotation speed of 200r/min, sequentially adding a calcium zinc heat stabilizer, titanium dioxide and a composite lubricant, and stirring at a rotation speed of 300r/min for 15min to obtain a mixture;
and secondly, feeding the mixture into an extruder, extruding to obtain an extruded material, shaping, cooling and cutting to obtain the impact-resistant high-temperature-resistant PVC pipe.
Further, in the second step, the temperature of the extruder head was controlled to 175-185 ℃, 185-195 ℃ and 195-210 ℃ respectively, and the drawing speed was controlled to 0.6m/min.
The composite lubricant is formed by mixing polyethylene wax and stearic acid according to the weight ratio of 1:1.
Comparative example 1
In this comparative example, nano calcium carbonate was used as the modified particles as compared with example 4.
Comparative example 2
In this comparative example, aluminum hydroxide, an inorganic flame retardant, was used as the modified particle as compared with example 4.
The properties of the PVC pipes prepared in examples 4 to 6 and comparative examples 1 to 3 were examined, and the results are shown in Table 1 below:
impact resistance: reference is made to the method described in GB/T1043-79 "impact test method for rigid Plastic simply supported beams".
High temperature resistance: reference is made to congo red as described in GB/T2917.1-2002.
Flame retardant properties: reference is made to the method described in GB/T20284-2006.
TABLE 1
From Table 1 above, it can be seen that the PVC pipes prepared in examples 4 to 6 of the present invention have excellent impact resistance and high temperature resistance, and impart excellent flame retardancy.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (7)
1. The anti-impact high-temperature-resistant PVC pipe is characterized by comprising the following raw materials in parts by weight: 75-100 parts of PVC resin, 12-18 parts of modified particles, 6-8 parts of calcium zinc heat stabilizer, 2-5 parts of titanium dioxide and 0.5-1.2 parts of composite lubricant;
the anti-impact high-temperature-resistant PVC pipe comprises the following steps:
firstly, mixing PVC resin and modified particles, uniformly stirring at a rotating speed of 150-200r/min, sequentially adding a calcium zinc heat stabilizer, titanium pigment and a composite lubricant, and stirring at a rotating speed of 200-300r/min for 10-15min to obtain a mixture;
secondly, feeding the mixture into an extruder, extruding to obtain an extruded material, shaping, cooling and cutting to obtain an impact-resistant high-temperature-resistant PVC pipe;
the modified particles are prepared by the following steps:
step S1, respectively adding an equal volume of polyacrylic acid aqueous solution with the concentration of 1g/L into a sodium carbonate solution with the concentration of 0.1mol/L and a calcium chloride solution with the concentration of 0.1mol/L, and uniformly stirring for 20min to form a solution a and a solution b; transferring the solution a into a three-neck flask, adding a sodium dodecyl sulfonate aqueous solution with the concentration of 10mmol/L, heating to 80 ℃, uniformly stirring and reacting for 30min, adding the solution b after the reaction is finished, uniformly stirring and reacting for 1h at the rotating speed of 250r/min, vacuum-pumping and filtering after the reaction is finished, respectively washing a filter cake with deionized water and absolute ethyl alcohol for three times, transferring to a drying box with the temperature of 100 ℃, and drying for 8h to obtain a porous matrix;
s2, adding 1-hydroxyethylidene-1, 1-diphosphonic acid into deionized water, stirring at a constant speed until the 1-hydroxyethylidene-1, 1-diphosphonic acid is dissolved, adding aluminum hydroxide, heating to 100 ℃, reacting for 10 hours at a temperature, distilling under reduced pressure, and drying in vacuum to obtain flame-retardant particles;
and S3, adding the porous matrix into deionized water, stirring at a constant speed for 30min to obtain dispersion, adding dopamine hydrochloride, continuously stirring for 10min, adding Tris buffer solution to adjust pH until pH=8.5, heating to 40 ℃, adding flame-retardant particles after stirring at a constant speed for 12h, continuously stirring for 10h, filtering, washing with deionized water, and drying to obtain modified particles.
2. An impact and high temperature resistant PVC pipe according to claim 1, wherein the extruder head temperature is controlled in the second step to be 175-185 ℃, 185-195 ℃ and 195-210 ℃ respectively, and the drawing speed is 0.6m/min.
3. An impact resistant and high temperature resistant PVC pipe according to claim 1, wherein the composite lubricant is formed by mixing polyethylene wax and stearic acid in a weight ratio of 1:1.
4. The shock-resistant and high-temperature-resistant PVC pipe according to claim 1, wherein the dosage ratio of the polyacrylic acid aqueous solution, the sodium carbonate solution, the calcium chloride solution and the sodium dodecyl sulfate aqueous solution in the step S1 is controlled to be 50 mL/100 mL/50 mL.
5. An impact-resistant and high temperature-resistant PVC pipe according to claim 1, wherein the dosage ratio of 1-hydroxyethylidene-1, 1-diphosphonic acid, aluminum hydroxide and deionized water is controlled to be 0.05-1 mol:0.1-0.2 mol:500 mL in the step S2.
6. The anti-impact high-temperature-resistant PVC pipe according to claim 1, wherein the dosage ratio of the porous matrix, the dopamine hydrochloride, the flame-retardant particles and the deionized water is controlled to be 10-15 g/3-5 g/0.1-0.3 g/1000 mL in the step S3.
7. The process for producing an impact-resistant and high temperature-resistant PVC pipe according to claim 1, comprising the steps of:
firstly, mixing PVC resin and modified particles, uniformly stirring at a rotating speed of 150-200r/min, sequentially adding a calcium zinc heat stabilizer, titanium pigment and a composite lubricant, and stirring at a rotating speed of 200-300r/min for 10-15min to obtain a mixture;
and secondly, feeding the mixture into an extruder, extruding to obtain an extruded material, shaping, cooling and cutting to obtain the impact-resistant high-temperature-resistant PVC pipe.
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