CN111471250A - PVC pipe fitting composition with ultrahigh Vicat softening temperature and preparation method thereof - Google Patents
PVC pipe fitting composition with ultrahigh Vicat softening temperature and preparation method thereof Download PDFInfo
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- CN111471250A CN111471250A CN202010351623.9A CN202010351623A CN111471250A CN 111471250 A CN111471250 A CN 111471250A CN 202010351623 A CN202010351623 A CN 202010351623A CN 111471250 A CN111471250 A CN 111471250A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- 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
- C08K3/24—Acids; Salts thereof
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- C08K2003/265—Calcium, strontium or barium carbonate
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C—CHEMISTRY; METALLURGY
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention provides a PVC pipe fitting composition with an ultrahigh Vicat softening temperature, which comprises the following components in parts by weight: 40-60 parts of PVC resin, 40-60 parts of blending modified PVC resin, 3.5-4.5 parts of heat stabilizer, 15-25 parts of filler, 2-3 parts of colorant, 0.5-3 parts of lubricant and 1-2 parts of processing aid. The PVC pipe fitting composition provided by the invention not only effectively improves the Vicat softening temperature to 82-92 ℃, but also ensures that the PVC pipe fitting prepared from the PVC pipe fitting composition is not easy to crack, thereby improving the application range of PVC products.
Description
Technical Field
The invention belongs to the field of high polymer materials, and particularly relates to a PVC pipe fitting composition with an ultrahigh Vicat softening temperature and a preparation method thereof.
Background
The PVC pipe fitting plays roles in connection, control, diversion, sealing, supporting and the like in a pipeline system of building installation engineering. In recent years, in building installation engineering, PVC pipes are widely applied due to the advantages of light weight, good mechanical property, convenience in field installation and the like. In the use process of the PVC pipe fitting, the heat resistance is higher. Polyvinyl chloride (PVC), one of five general synthetic resins, is widely used in various fields of people's life due to its advantages of excellent performance, low price, etc. However, the polyvinyl chloride has poor processability, and a large amount of processing aids are required to be added, so that the vicat softening temperature of the polyvinyl chloride pipe fitting is low, and the heat resistance is poor, so that a PVC pipe fitting composition with enough strength and ultrahigh vicat softening temperature is required to increase the application range of the PVC pipe fitting.
CN201210418369.5 discloses a high Vicat softening temperature hard PVC medical modified material, which is prepared by blending PVC and CPVC resin and adding a specific plasticizer, a stabilizer, an antioxidant, an auxiliary stabilizer and a lubricant. Wherein the CPVC is a chlorinated modified product of PVC. However, although the vicat temperature of the hard PVC medical modified material prepared in the patent is increased, the PVC pipe prepared by using the material is easy to crack and has short service life. Therefore, it is necessary to develop a composition for PVC pipe, which can not only increase the vicat softening temperature, but also make the PVC pipe not easily broken and damaged, so as to ensure its normal use.
Disclosure of Invention
In order to solve the above problems, a first object of the present invention is to provide a PVC pipe composition with an ultra-high vicat softening temperature, which not only effectively increases the vicat softening temperature to 82-92 ℃, but also makes the PVC pipe made from the PVC pipe composition less prone to cracking, thereby increasing the application range of PVC products.
The invention also provides a preparation method of the PVC pipe fitting composition with the ultrahigh Vicat softening temperature, which is characterized in that the Vicat temperature of a PVC product is increased by adding blending modified PVC resin, wherein the blending modified PVC resin is prepared by modifying the PVC resin by adopting polyhexamethylene adipamide as a PVC thermal deformation modifier, a compatibilizer, a heat stabilizer, a lubricant and a filler, and the Vicat softening temperature of the PVC product can be increased under the normal use condition by adding the PVC pipe fitting composition prepared from the blending modified PVC resin.
In order to realize the first purpose of the invention, the invention adopts the technical scheme that: the PVC pipe fitting composition with the ultrahigh Vicat softening temperature comprises the following components in parts by weight:
40-60 parts of PVC resin
40-60 parts of blending modified PVC resin
3.5-4.5 parts of heat stabilizer
15-25 parts of filler
2-3 parts of colorant
0.5-3 parts of lubricant
1-2 parts of processing aid.
According to the technical scheme, the blending modified PVC resin is added, and then the heat stabilizer, the filler, the colorant, the lubricant and the processing aid are combined with the PVC resin to process the PVC pipe fitting composition, so that the Vicat softening temperature of a PVC product is increased, and the application range of the PVC product is further increased.
Preferably, the PVC pipe fitting composition with the ultrahigh Vicat softening temperature comprises the following components in parts by weight:
PVC resin- -50 parts
50 portions of blending modified PVC resin
35 portions of heat stabilizer
Filler- -20 parts
Colorant- -2.5 parts
Lubricant- -1.5 parts
1 part of processing aid.
Further, the blending modified PVC resin comprises the following components: PVC resin, PVC thermal deformation modifier, compatibilizer, heat stabilizer, lubricant and filler.
In the technical scheme, polyhexamethylene adipamide is adopted as a PVC thermal deformation modifier, a compatibilizer, a heat stabilizer, a lubricant and a filler are adopted to modify PVC resin to prepare blending modified PVC resin, and the PVC pipe fitting composition prepared from the blending modified PVC resin can improve the Vicat softening temperature of a PVC product under the condition of keeping good wear resistance and impact resistance.
Further, the weight ratio of the PVC resin, the PVC thermal deformation modifier, the compatibilizer, the thermal stabilizer and the lubricant is 100: 15-35: 6-12: 10-15: 3-5; the weight of the filler is 4-6% of that of the PVC thermal deformation modifier.
Further, the weight ratio of the PVC resin, the PVC thermal deformation modifier, the compatibilizer and the thermal stabilizer is 100: 33.3: 10.7: 13.3: 3; the weight of the filler is 4% of the weight of the PVC thermal deformation modifier.
Further, the PVC thermal deformation modifier is polyhexamethylene adipamide; the compatibilizer is one or more of ethylene vinyl acetate grafted maleic anhydride (EVA-g-MAH), acrylonitrile-butadiene-styrene terpolymer grafted maleic anhydride (ABS-g-MAH) and polyethylene grafted maleic anhydride (PE-g-MAH); the heat stabilizer is one or more of a calcium-zinc heat stabilizer and a metal soap heat stabilizer; the lubricant is one or more of polyglycerol, lead stearate, alkyl wax, polyethylene wax, oxidized polyethylene wax, stearic acid and stearic acid monoglyceride; the filler is one or more of nano montmorillonite, nano sepiolite and mica.
Further, the filler is calcium carbonate; the colorant is rutile titanium dioxide; the processing aid is ACR 401.
In order to achieve the second object of the invention, the technical scheme adopted by the invention is as follows: a preparation method of a PVC pipe fitting composition with an ultrahigh Vicat softening temperature comprises the following steps:
1) preparing blending modified PVC resin: (a) putting PVC resin, PVC thermal deformation modifier, thermal stabilizer, compatibilizer and lubricant into a stirrer, stirring and heating; (b) adding filler, continuously stirring and heating, then adding into a cold pot, stirring and cooling to obtain the blending modified PVC resin.
2) Putting PVC resin, blending modified PVC resin, a heat stabilizer, a lubricant and a processing aid into a stirrer for stirring and heating;
3) adding a filler and a colorant, continuously stirring and heating, then adding into a cooling pot, stirring and cooling to obtain the PVC pipe fitting composition with the ultrahigh Vicat softening temperature.
Further, the stirring rotation speed in the step 1) and the step (a) is 650-700rpm, and the stirring rotation speed in the step 2) and the step (b) is 300-350 rpm.
The invention has the advantages and positive effects that:
the preparation method adopts polyhexamethylene adipamide as a PVC thermal deformation modifier, a compatibilizer, a heat stabilizer, a lubricant and a filler to modify PVC resin to prepare blending modified PVC resin, and the blending modified PVC resin is added, then the heat stabilizer, the filler, the colorant, the lubricant and the processing aid are combined with the PVC resin to prepare the PVC pipe fitting composition; on the basis of normal use, the Vicat softening temperature of the PVC pipe fitting prepared from the PVC pipe fitting composition can be effectively increased to about 90 ℃ from about 70 ℃ of the original Vicat softening temperature, and the PVC pipe fitting is not easy to break, so that the application range of the PVC pipe fitting is greatly increased.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
Example 1:
consists of the following components:
(1) blending modified PVC resin
PVC resin: 85kg of
PVC thermal deformation modifier: 15kg of polyhexamethylene adipamide
Compatibilizer: 6kg of acrylonitrile-butadiene-styrene terpolymer grafted maleic anhydride (ABS-g-MAH)
Thermal stabilizer: 10kg of calcium-zinc heat stabilizer
Lubricant: 1.55kg of stearic acid monoglyceride and 1kg of stearic acid
Filling: nano montmorillonite 0.6kg
(2) Ultrahigh Vicat softening temperature PVC pipe fitting composition
PVC resin: 60kg of
Blending modified PVC resin: 40kg of
Thermal stabilizer: calcium zinc heat stabilizer 3.5kg
Lubricant: oxidized polyethylene wax 1.5kg
Filling agent: light calcium carbonate 20kg
Colorant: 2.5kg titanium dioxide
Processing aid: 1kgACR401
The preparation method comprises the following steps:
1. preparing blending modified PVC resin:
85kg of PVC resin, 15kg of polyhexamethylene adipamide, 6kg of acrylonitrile-butadiene-styrene terpolymer grafted maleic anhydride (ABS-g-MAH), 10kg of calcium-zinc heat stabilizer, 1.55kg of stearic acid monoglyceride and 1kg of stearic acid are put into a stirrer at room temperature, the rotating speed of the stirrer is 675rpm, and 0.6kg of nano montmorillonite is added after the temperature is raised to 80 ℃. And continuously heating to 180 ℃, then putting the mixture into a cooling pot, stirring and cooling to 45 ℃, discharging, and stirring the mixture in the cooling pot at the rotating speed of 350rpm to obtain the blending modified PVC resin.
2. Preparing the PVC pipe fitting composition with the ultrahigh Vicat softening temperature:
60kg of PVC resin, 40kg of the blending modified PVC resin prepared in the step 1, 3.5kg of calcium-zinc heat stabilizer, 1.5kg of oxidized polyethylene wax and 1kg of ACR401 are put into a stirrer, the rotating speed of the stirrer is 675rpm, the temperature is increased to 80 ℃, 20kg of light calcium carbonate and 2.5kg of titanium dioxide are put into the stirrer, the mixture is continuously heated to 120 ℃, then the mixture is put into a cold pot, stirred and cooled to 45 ℃ and discharged, the stirring speed of the cold pot is 350rpm, the PVC pipe fitting composition with the ultrahigh Vicat softening temperature is obtained, the Vicat softening temperature of the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is detected, and the Vicat softening temperature is shown in Table 1.
The prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature can be further subjected to injection molding by an injection molding machine to obtain a PVC tee pipe fitting. The obtained PVC tee pipe was subjected to a drop test, and the results are shown in Table 1.
Example 2:
consists of the following components:
(1) blending modified PVC resin
PVC resin: 75kg of
PVC thermal deformation modifier: 25kg of polyhexamethylene adipamide
Compatibilizer: 6kg of acrylonitrile-butadiene-styrene terpolymer grafted maleic anhydride (ABS-g-MAH)
Thermal stabilizer: 10kg of calcium-zinc heat stabilizer
Lubricant: 1.25kg of stearic acid monoglyceride and 1kg of stearic acid
Filling: nano montmorillonite 1.0kg
(2) Ultrahigh Vicat softening temperature PVC pipe fitting composition
PVC resin: 60kg of
Blending modified PVC resin: 40kg of
Thermal stabilizer: calcium zinc heat stabilizer 3.5kg
Lubricant: oxidized polyethylene wax 1.5kg
Filling agent: light calcium carbonate 20kg
Colorant: 2.5kg titanium dioxide
Processing aid: 1kgACR401
The preparation method comprises the following steps:
the vicat softening temperature of the prepared ultra-high vicat softening temperature PVC pipe composition was measured as in example 1, and the results are shown in table 1; the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is further subjected to injection molding by an injection molding machine to obtain a PVC tee pipe fitting, and the prepared PVC tee pipe fitting is subjected to a drop test, and the result is shown in Table 1.
Example 3:
consists of the following components:
(1) blending modified PVC resin
PVC resin: 75kg of
PVC thermal deformation modifier: 25kg of polyhexamethylene adipamide
Compatibilizer: 8kg of acrylonitrile-butadiene-styrene terpolymer grafted maleic anhydride (ABS-g-MAH)
Thermal stabilizer: 10kg of calcium-zinc heat stabilizer
Lubricant: 1.25kg of stearic acid monoglyceride and 1kg of stearic acid
Filling: nano montmorillonite 1.0kg
(2) Ultrahigh Vicat softening temperature PVC pipe fitting composition
PVC resin: 60kg of
Blending modified PVC resin: 40kg of
Thermal stabilizer: calcium zinc heat stabilizer 3.5kg
Lubricant: oxidized polyethylene wax 1.5kg
Filling agent: light calcium carbonate 20kg
Colorant: 2.5kg titanium dioxide
Processing aid: 1kgACR401
The preparation method comprises the following steps:
the vicat softening temperature of the prepared ultra-high vicat softening temperature PVC pipe composition was measured as in example 1, and the results are shown in table 1; the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is further subjected to injection molding by an injection molding machine to obtain a PVC tee pipe fitting, and the prepared PVC tee pipe fitting is subjected to a drop test, and the result is shown in Table 1.
Example 4:
consists of the following components:
(1) blending modified PVC resin
PVC resin: 75kg of
PVC thermal deformation modifier: 25kg of polyhexamethylene adipamide
Compatibilizer: 8kg of acrylonitrile-butadiene-styrene terpolymer grafted maleic anhydride (ABS-g-MAH)
Thermal stabilizer: 10kg of calcium-zinc heat stabilizer
Lubricant: 1.25kg of stearic acid monoglyceride and 1kg of stearic acid
Filling: nano montmorillonite 1.0kg
(2) Ultrahigh Vicat softening temperature PVC pipe fitting composition
PVC resin: 50kg of
Blending modified PVC resin: 50kg of
Thermal stabilizer: calcium zinc heat stabilizer 3.5kg
Lubricant: oxidized polyethylene wax 1.5kg
Filling agent: light calcium carbonate 20kg
Colorant: 2.5kg titanium dioxide
Processing aid: 1kgACR401
The preparation method comprises the following steps:
the vicat softening temperature of the prepared ultra-high vicat softening temperature PVC pipe composition was measured as in example 1, and the results are shown in table 1; the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is further subjected to injection molding by an injection molding machine to obtain a PVC tee pipe fitting, and the prepared PVC tee pipe fitting is subjected to a drop test, and the result is shown in Table 1.
Example 5:
consists of the following components:
(1) blending modified PVC resin
PVC resin: 75kg of
PVC thermal deformation modifier: 25kg of polyhexamethylene adipamide
Compatibilizer: 8kg of acrylonitrile-butadiene-styrene terpolymer grafted maleic anhydride (ABS-g-MAH)
Thermal stabilizer: 10kg of calcium-zinc heat stabilizer
Lubricant: 1.25kg of stearic acid monoglyceride and 1kg of stearic acid
Filling: nano montmorillonite 1.0kg
(2) Ultrahigh Vicat softening temperature PVC pipe fitting composition
PVC resin: 50kg of
Blending modified PVC resin: 50kg of
Thermal stabilizer: calcium zinc heat stabilizer 3.5kg
Lubricant: stearic acid 0.8kg, alkyl wax 0.2kg
Filling agent: light calcium carbonate 20kg
Colorant: 2.5kg titanium dioxide
Processing aid: 1kgACR401
The preparation method comprises the following steps:
the vicat softening temperature of the prepared ultra-high vicat softening temperature PVC pipe composition was measured as in example 1, and the results are shown in table 1; the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is further subjected to injection molding by an injection molding machine to obtain a PVC tee pipe fitting, and the prepared PVC tee pipe fitting is subjected to a drop test, and the result is shown in Table 1.
Example 6:
consists of the following components:
(1) blending modified PVC resin
PVC resin: 75kg of
PVC thermal deformation modifier: polyhexamethylene adipamide 11.25kg
Compatibilizer: 4.5kg of acrylonitrile-butadiene-styrene terpolymer grafted maleic anhydride (ABS-g-MAH)
Thermal stabilizer: calcium zinc heat stabilizer 7.5kg
Lubricant: 1.25kg of stearic acid monoglyceride and 1kg of stearic acid
Filling: 0.45kg of nano montmorillonite
(2) Ultrahigh Vicat softening temperature PVC pipe fitting composition
PVC resin: 40kg of
Blending modified PVC resin: 60kg of
Thermal stabilizer: calcium zinc heat stabilizer 4.5kg
Lubricant: oxidized polyethylene wax 3kg
Filling agent: light calcium carbonate 25kg
Colorant: 3kg titanium white powder
Processing aid: 2kgACR401
The preparation method comprises the following steps:
the results obtained in the same manner as in example 1 are shown in Table 1; the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is further subjected to injection molding by an injection molding machine to obtain a PVC tee pipe fitting, and the prepared PVC tee pipe fitting is subjected to a drop test, and the result is shown in Table 1.
Example 7:
consists of the following components:
(1) blending modified PVC resin
PVC resin: 75kg of
PVC thermal deformation modifier: 26.25kg of polyhexamethylene adipamide
Compatibilizer: 9kg of acrylonitrile-butadiene-styrene terpolymer grafted maleic anhydride (ABS-g-MAH)
Thermal stabilizer: 10kg of calcium-zinc heat stabilizer
Lubricant: stearic acid monoglyceride 2.25kg, stearic acid 1.5kg
Filling: nano montmorillonite 1.575kg
(2) Ultrahigh Vicat softening temperature PVC pipe fitting composition
PVC resin: 60kg of
Blending modified PVC resin: 40kg of
Thermal stabilizer: calcium zinc heat stabilizer 3.5kg
Lubricant: oxidized polyethylene wax 0.5kg
Filling agent: light calcium carbonate 20kg
Colorant: 2.5kg titanium dioxide
Processing aid: 1.5kgACR401
The preparation method comprises the following steps:
the same as example 1, wherein the rotation speed of the stirrer in the step 1 is 675rpm, and the rotation speed of the cold pot is 350 rpm; in step 2, the rotating speed of the stirrer is 675rpm, and the rotating speed of the stirring of the cooling pan is 350 rpm. The Vicat softening temperature of the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is detected, and the result is shown in Table 1; the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is further subjected to injection molding by an injection molding machine to obtain a PVC tee pipe fitting, and the prepared PVC tee pipe fitting is subjected to a drop test, and the result is shown in Table 1.
Example 8:
consists of the following components:
(1) blending modified PVC resin
PVC resin: 75kg of
PVC thermal deformation modifier: 25kg of polyhexamethylene adipamide
Compatibilizer: ethylene vinyl acetate grafted maleic anhydride (EVA-g-MAH)8kg
Thermal stabilizer: 10kg of calcium-zinc heat stabilizer
Lubricant: polyglycerol 2.25kg
Filling: nano sepiolite 1.0kg
(2) Ultrahigh Vicat softening temperature PVC pipe fitting composition
PVC resin: 50kg of
Blending modified PVC resin: 50kg of
Thermal stabilizer: metal soap Heat stabilizer 3.5kg
Lubricant: 1.5kg of hydrocarbon-based wax
Filling agent: light calcium carbonate 20kg
Colorant: 2.5kg titanium dioxide
Processing aid: 1kgACR401
The preparation method comprises the following steps:
the same as example 1, wherein the rotation speed of the stirrer in the step 1 is 650rpm, and the stirring rotation speed of the cooling pan is 300 rpm; in the step 2, the rotating speed of the stirrer is 650rpm, and the rotating speed of the stirring of the cooling pan is 300 rpm. The Vicat softening temperature of the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is detected, and the result is shown in Table 1; the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is further subjected to injection molding by an injection molding machine to obtain a PVC tee pipe fitting, and the prepared PVC tee pipe fitting is subjected to a drop test, and the result is shown in Table 1.
Example 9:
consists of the following components:
(1) blending modified PVC resin
PVC resin: 75kg of
PVC thermal deformation modifier: 25kg of polyhexamethylene adipamide
Compatibilizer: polyethylene-grafted maleic anhydride (PE-g-MAH)8kg
Thermal stabilizer: metal soap heat stabilizer 10kg
Lubricant: polyethylene wax 2.25kg
Filling: mica 1.0kg
(2) Ultrahigh Vicat softening temperature PVC pipe fitting composition
PVC resin: 50kg of
Blending modified PVC resin: 50kg of
Thermal stabilizer: calcium zinc heat stabilizer 3.5kg
Lubricant: 1.5kg of lead stearate
Filling agent: light calcium carbonate 20kg
Colorant: 2.5kg titanium dioxide
Processing aid: 1kgACR401
The preparation method comprises the following steps:
the same as example 1, wherein the rotation speed of the stirrer in the step 1 is 675rpm, and the rotation speed of the stirring of the cooling pan is 325 rpm; in step 2, the rotation speed of the stirrer is 675rpm, and the rotation speed of the cold pot is 325 rpm. The Vicat softening temperature of the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is detected, and the result is shown in Table 1; the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is further subjected to injection molding by an injection molding machine to obtain a PVC tee pipe fitting, and the prepared PVC tee pipe fitting is subjected to a drop test, and the result is shown in Table 1.
Example 10:
consists of the following components:
(1) blending modified PVC resin
PVC resin: 75kg of
PVC thermal deformation modifier: 25kg of polyhexamethylene adipamide
Compatibilizer: ethylene vinyl acetate grafted maleic anhydride (EVA-g-MAH)8kg
Thermal stabilizer: 10kg of calcium-zinc heat stabilizer
Lubricant: oxidized polyethylene wax 2.25kg
Filling: mica 1.0kg
(2) Ultrahigh Vicat softening temperature PVC pipe fitting composition
PVC resin: 50kg of
Blending modified PVC resin: 50kg of
Thermal stabilizer: metal soap Heat stabilizer 3.5kg
Lubricant: 1.5kg of stearic acid monoglyceride
Filling agent: light calcium carbonate 20kg
Colorant: 2.5kg titanium dioxide
Processing aid: 1kgACR401
The preparation method comprises the following steps:
the same as example 1, wherein the rotation speed of the stirrer in the step 1 is 700rpm, and the stirring rotation speed of the cooling pan is 350 rpm; in the step 2, the rotating speed of the stirrer is 700rpm, and the rotating speed of the stirring of the cooling pan is 350 rpm. The Vicat softening temperature of the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is detected, and the result is shown in Table 1; the prepared PVC pipe fitting composition with the ultrahigh Vicat softening temperature is further subjected to injection molding by an injection molding machine to obtain a PVC tee pipe fitting, and the prepared PVC tee pipe fitting is subjected to a drop test, and the result is shown in Table 1.
Comparative example 1:
preparation of PVC pipe composition:
100kg of polyvinyl chloride resin, 4.5kg of calcium-zinc heat stabilizer, 0.8kg of stearic acid, 0.2kg of alkyl wax and 1.0kg of ACR processing aid are put into a stirrer, the rotating speed of the stirrer is 675rpm, 30kg of light calcium carbonate and 2.5kg of titanium dioxide are put into the stirrer after the temperature is increased to 80 ℃, the mixture is continuously heated to 120 ℃, then the mixture is put into a cooling pot, stirred and cooled to 45 ℃ and discharged, and the stirring rotating speed of the cooling pot is 350rpm, so that the PVC pipe fitting composition is obtained. The vicat softening temperature of the obtained PVC pipe composition was measured, and the results are shown in table 1.
Further, the prepared PVC pipe composition was injection-molded by an injection molding machine to obtain a PVC tee pipe, and the obtained PVC tee pipe was subjected to a drop test, the results of which are shown in table 1.
Comparative example 2:
preparation of PVC pipe composition:
100kg of polyvinyl chloride resin, 2.6kg of lead salt heat stabilizer, 0.8kg of stearic acid, 0.2kg of alkyl wax and 1.0kg of ACR processing aid are put into a stirrer, the rotating speed of the stirrer is 675rpm, 20kg of light calcium carbonate and 2.5kg of titanium dioxide are put into the stirrer after the temperature is increased to 80 ℃, the mixture is put into a cold pot after the temperature is continuously increased to 120 ℃, the mixture is stirred and cooled to 45 ℃ and discharged, and the stirring rotating speed of the cold pot is 350rpm, so that the PVC pipe fitting composition is obtained. The vicat softening temperature of the obtained PVC pipe composition was measured, and the results are shown in table 1.
Further, the prepared PVC pipe composition was injection-molded by an injection molding machine to obtain a PVC tee pipe, and the obtained PVC tee pipe was subjected to a drop test, the results of which are shown in table 1.
Comparative example 3:
preparation of PVC pipe composition:
100kg of polyvinyl chloride resin, 3.5kg of calcium-zinc heat stabilizer, 1.5kg of oxidized polyethylene wax and 1kg of ACR401 are put into a stirrer at the rotating speed of 675rpm, 30kg of light calcium carbonate and 2.5kg of titanium dioxide are put into the stirrer after the temperature is raised to 80 ℃, the mixture is put into a cooling pot after the temperature is continuously raised to 120 ℃, the mixture is stirred and cooled to 45 ℃ and discharged, and the stirring rotating speed of the cooling pot is 350rpm, so that the PVC pipe fitting composition is obtained. The vicat softening temperature of the obtained PVC pipe composition was measured, and the results are shown in table 1.
Further, the prepared PVC pipe composition was injection-molded by an injection molding machine to obtain a PVC tee pipe, and the obtained PVC tee pipe was subjected to a drop test, the results of which are shown in table 1.
Comparative example 4:
preparation of PVC pipe composition:
50kg of PVC resin, 50kg of CPVC resin, 3.5kg of calcium-zinc heat stabilizer, 1.5kg of oxidized polyethylene wax and 1kg of ACR401 are put into a stirrer at 675rpm of the rotating speed, 20kg of light calcium carbonate and 2.5kg of titanium dioxide are put into the stirrer after the temperature is increased to 80 ℃, the mixture is put into a cold pot after the temperature is continuously increased to 120 ℃, the mixture is stirred and cooled to 45 ℃ and discharged, and the stirring rotating speed of the cold pot is 350rpm, so that the PVC pipe fitting composition is obtained. The vicat softening temperature of the obtained PVC pipe composition was measured, and the results are shown in table 1.
Further, the prepared PVC pipe composition was injection-molded by an injection molding machine to obtain a PVC tee pipe, and the obtained PVC tee pipe was subjected to a drop test, the results of which are shown in table 1.
The vicat softening temperature of the PVC pipe composition prepared according to the preparation methods of the above examples and comparative examples was measured, and the prepared PVC pipe composition was used to prepare a PVC tee pipe, and the prepared PVC tee pipe was subjected to a drop test to obtain the performance test results shown in table 1: wherein, the test condition of the drop test is that the nominal diameter of the PVC tee pipe fitting is 100mm, the PVC tee pipe fitting drops from a position 1m away from the ground, and the ground is a flat concrete ground;
TABLE 1 Performance test results
| Examples | Vicat softening temperature (. degree. C.) | Phenomenon of drop test |
| Example 1 | 82.9 | Without cracking |
| Example 2 | 88.6 | Without cracking |
| Example 3 | 90.8 | Without cracking |
| Example 4 | 92.6 | Without cracking |
| Example 5 | 92.1 | Without cracking |
| Example 6 | 83.9 | Without cracking |
| Example 7 | 91.9 | Without cracking |
| Example 8 | 92.5 | Without cracking |
| Example 9 | 92.9 | Without cracking |
| Example 10 | 92.0 | Without cracking |
| Comparative example 1 | 74.6 | 2/10 break |
| Comparative example 2 | 74.1 | Without cracking |
| Comparative example 3 | 74.5 | 1/10 break |
| Comparative example 4 | 95.6 | 6/10 break |
As can be seen from Table 1, the comparison of comparative examples 1-3 with examples 1-10 shows that the Vicat softening temperature of the PVC tee pipe fitting prepared in the embodiment of the invention is higher than that of the common PVC pipe fitting, and further shows that the Vicat softening temperature of a PVC product can be effectively increased by adding the blending modified PVC resin in the production of the PVC pipe fitting composition of the invention;
compared with the examples 1-10, the comparative example 4 shows that the PVC pipe fitting prepared from the PVC pipe fitting composition with the ultrahigh Vicat softening temperature has better performance and higher stability, is not easy to crack and damage when being subjected to external force, and is convenient to use normally.
Meanwhile, as can be seen from comparative examples 1 to 3, when the content of each component in the PVC pipe composition is not changed, the vicat softening temperature of the PVC pipe prepared in example 3 is the highest and the effect is the best, and in the blending modified PVC resin, the weight ratio of the PVC resin, the PVC thermal deformation modifier, the compatibilizer, the thermal stabilizer and the lubricant is 100: 33.3: 10.7: 13.3: 3.
meanwhile, as can be seen from comparative examples 3 to 10, when the contents of the components in the blending modified PVC resin are not changed, the vicat softening temperature of the PVC pipe prepared in example 4 is the highest and the effect is the best, that is, the weight parts of the components of the PVC pipe composition are: 50 parts of PVC resin, 50 parts of blending modified PVC resin, 3.5 parts of heat stabilizer, 20 parts of filler, 2.5 parts of colorant, 1.5 parts of lubricant and 1 part of processing aid.
Although the embodiments of the present invention have been described in detail, the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. The PVC pipe fitting composition with the ultrahigh Vicat softening temperature is characterized by comprising the following components in parts by weight:
40-60 parts of PVC resin
40-60 parts of blending modified PVC resin
3.5-4.5 parts of heat stabilizer
15-25 parts of filler
2-3 parts of colorant
0.5-3 parts of lubricant
1-2 parts of processing aid.
2. The PVC pipe composition with the ultrahigh Vicat softening temperature as claimed in claim 1, which comprises the following components in parts by weight:
PVC resin- -50 parts
50 portions of blending modified PVC resin
3.5 portions of heat stabilizer
Filler- -20 parts
Colorant- -2.5 parts
Lubricant- -1.5 parts
1 part of processing aid.
3. The ultra-high vicat softening temperature PVC pipe composition of claim 1 or 2, wherein said blended modified PVC resin comprises the following components: PVC resin, PVC thermal deformation modifier, compatibilizer, heat stabilizer, lubricant and filler.
4. The PVC pipe composition with ultra-high Vicat softening temperature of claim 3, wherein the weight ratio of the PVC resin, the PVC thermal deformation modifier, the compatibilizer, the thermal stabilizer and the lubricant is 100: 15-35: 6-12: 10-15: 3-5; the weight of the filler is 4-6% of that of the PVC thermal deformation modifier.
5. The PVC pipe composition with ultra-high Vicat softening temperature of claim 4, wherein the weight ratio of the PVC resin, the PVC thermal deformation modifier, the compatibilizer and the thermal stabilizer is 100: 33.3: 10.7: 13.3: 3; the weight of the filler is 4% of the weight of the PVC thermal deformation modifier.
6. The ultra-high vicat softening temperature PVC pipe composition of claim 5, wherein said PVC heat distortion modifier is polyhexamethylene adipamide; the compatibilizer is one or more of ethylene vinyl acetate grafted maleic anhydride, acrylonitrile-butadiene-styrene terpolymer grafted maleic anhydride and polyethylene grafted maleic anhydride; the heat stabilizer is one or more of a calcium-zinc heat stabilizer and a metal soap heat stabilizer; the lubricant is one or more of polyglycerol, lead stearate, alkyl wax, polyethylene wax, oxidized polyethylene wax, stearic acid and stearic acid monoglyceride; the filler is one or more of nano montmorillonite, nano sepiolite and mica.
7. The PVC pipe composition with ultra-high Vicat softening temperature as claimed in claim 1 or 2, wherein the heat stabilizer is one or more of calcium zinc heat stabilizer and metal soap heat stabilizer; the lubricant is one or more of polyglycerol, lead stearate, alkyl wax, polyethylene wax, oxidized polyethylene wax, stearic acid and stearic acid monoglyceride; the filler is calcium carbonate; the colorant is rutile titanium dioxide; the processing aid is ACR 401.
8. The preparation method of the PVC pipe fitting composition with the ultrahigh Vicat softening temperature is characterized by comprising the following steps:
1) preparing blending modified PVC resin;
2) putting PVC resin, blending modified PVC resin, a heat stabilizer, a lubricant and a processing aid into a stirrer for stirring and heating;
3) adding a filler and a colorant, continuously stirring and heating, then adding into a cooling pot, stirring and cooling to obtain the PVC pipe fitting composition with the ultrahigh Vicat softening temperature.
9. The method for preparing the PVC pipe composition with the ultrahigh Vicat softening temperature according to claim 8, wherein the step 1) of preparing the blending modified PVC resin specifically comprises the following steps:
(a) putting PVC resin, PVC thermal deformation modifier, thermal stabilizer, compatibilizer and lubricant into a stirrer, stirring and heating;
(b) adding filler, continuously stirring and heating, then adding into a cold pot, stirring and cooling to obtain the blending modified PVC resin.
10. The method as claimed in claim 9, wherein the stirring speed in step 1) and step (a) is 650-700rpm, and the stirring speed in step 2) and step (b) is 300-350 rpm.
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Address after: No.58, Caiyun East Street, Hangu modern industrial zone, Binhai New Area Development Zone, Tianjin Patentee after: Ad pipeline (Tianjin) Co.,Ltd. Address before: No.58, Caiyun East Street, Hangu modern industrial zone, Binhai New Area Development Zone, Tianjin Patentee before: TIANJIN YONGGAO PLASTIC INDUSTRY DEVELOPMENT CO.,LTD. |