CN113652045B - High-impact CPVC injection molding pipe fitting and preparation method thereof - Google Patents
High-impact CPVC injection molding pipe fitting and preparation method thereof Download PDFInfo
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- CN113652045B CN113652045B CN202111047808.1A CN202111047808A CN113652045B CN 113652045 B CN113652045 B CN 113652045B CN 202111047808 A CN202111047808 A CN 202111047808A CN 113652045 B CN113652045 B CN 113652045B
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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
- C08L27/22—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 modified by chemical after-treatment
- C08L27/24—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 modified by chemical after-treatment halogenated
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- 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
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of high polymer materials, in particular to a high-impact CPVC injection molding pipe fitting and a preparation method thereof. The addition of the acrylate processing aid ACR to conventional CPVC resin formulation systems increases the melt viscosity of the otherwise poorly flowing CPVC resin. Based on the problems, the invention provides the high-impact CPVC injection pipe fitting, wherein the VCE resin is adopted to replace the processing ACR, and the VCE resin and the impact modifier MBS are matched for use, so that the physical property of the CPVC injection pipe fitting can be effectively improved, the torque of the CPVC injection pipe fitting in the processing process is reduced, the processing fluidity of the CPVC injection pipe fitting is improved, and the CPVC injection pipe fitting is very beneficial to improving the comprehensive performance of the CPVC injection pipe fitting.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a high-impact CPVC injection molding pipe fitting and a preparation method thereof.
Background
Chlorinated polyvinyl chloride (CPVC) is a product obtained by further chlorinating polyvinyl chloride (PVC), and the chlorine content can reach 63% -73%. Compared with PVC, CPVC is used as a novel engineering plastic, a large amount of chlorine atoms in the molecular structure endow the novel engineering plastic with stronger polarity, the segment rigidity is enhanced, and the intermolecular acting force is increased. Has the characteristics of weather resistance, corrosion resistance, aging resistance, heat deformation resistance, flame retardance, self-extinguishing property and the like. The method is widely applied to various fields of various pipes, pipe fittings, sectional materials, sheets, foam materials, coatings and the like.
However, because of the characteristics of high intermolecular force, high chlorine content and the like of CPVC, the melt viscosity is high, the fluidity is poor, the processing is difficult and the decomposition is very easy. In addition, the high processing torque makes CPVC unsuitable for conventional PVC forming equipment, further compressing the production space.
Increasing melt flow by increasing processing temperature accelerates CPVC dechlorination, reduces product performance and is prone to paste. At present, an acrylic ester processing aid ACR is generally used in a CPVC injection molding pipe fitting formula to improve the processability, more lubricant is added to reduce the melt viscosity and improve the fluidity, but excessive lubrication has the defects of reducing the Vicat softening temperature of the CPVC pipe fitting and losing part of impact resistance and the like. This is one of the important reasons limiting the popularization of CPVC products.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to solve the technical problems that: the addition of the acrylate processing aid ACR to conventional CPVC injection molding formulation systems increases the melt viscosity of the otherwise poorly flowing CPVC resin, while the addition of more lubricant to the formulation often results in reduced impact resistance of the CPVC product.
The technical scheme adopted for solving the technical problems is as follows: the invention provides a high-impact CPVC injection molding pipe fitting, which comprises the following components in parts by weight:
CPVC resin 100 parts
1-3 parts of functional modifier
Petroleum resin 0.1-0.5 parts
3-4 parts of stabilizer
1-2 parts of internal lubricant
1.5 to 3.0 parts of external lubricant
6-10 parts of impact modifier
3-7 parts of inorganic filler
Pigment 0.3-0.6 weight portions.
Specifically, the CPVC resin is injection molding grade, and the chlorine content is 67% -68%.
Specifically, the functional modifier is a VCE resin.
Specifically, the stabilizer is methyl tin mercaptide YT-181.
Specifically, the internal lubricant is calcium stearate.
Specifically, the external lubricant is a mixture of OPE wax and PE wax.
Specifically, the impact modifier is Shandong Ruifeng MBS BL-126.
Specifically, the high-impact CPVC injection molding pipe fitting is prepared according to the following steps:
(1) According to the formula amount, the raw materials are added into a hot mixing pot of a high-low speed mixing unit to be heated and mixed at a high speed, the mixing speed is 900-1000r/min, the temperature of the hot mixing pot is increased to 110-120 ℃ within 10-12 min, and then the mixture is placed into a cold mixing pot to be stirred and cooled to the room temperature, so that CPVC dry mixed materials are obtained;
(2) Extruding and granulating the dry blend by a double-screw extruder to obtain CPVC granules;
(3) And (3) sampling the CPVC particles through an injection molding machine to obtain the injection molded pipe fitting.
Specifically, the technological parameters of the twin-screw extrusion granulation are as follows: the feeding speed of the twin-screw extruder was 25rpm; the rotation speed of the twin-screw extruder is 30rpm; the temperature of the twin-screw extruder is controlled by zones, the temperature of the first zone is 172-178 ℃, the temperature of the second zone is 185-190 ℃, the temperature of the third zone is 190-195 ℃, and the temperature of the fourth zone is 193-198 ℃. The traction speed is 1-2m/min, the grain cutting mode adopts water-cooled grain cutting, and the grain length is controlled to be about 4mm.
Specifically, the injection molding machine sample processing parameters are as follows: the temperature of the injection molding machine charging barrel is controlled by areas, wherein the temperature of a first area is 170-175 ℃, the temperature of a second area is 172-175 ℃, the temperature of a third area is 175-180 ℃, the temperature of a fourth area is 180-185 ℃, and the temperature of a nozzle is 190-195 ℃; back pressure is 0-5bar; the die closing time of the injection molding machine is 1-3s;
injecting CPVC melt in a molten state into a mold through a nozzle, wherein the glue injection speed is 55-80% of the maximum speed, and the glue injection pressure is 50-70bar; the pressure maintaining pressure is 55-60bar, and the pressure maintaining time is 2-5s; the cooling time is 2-5s; the mold opening time is 1-4s; the demolding time is 1-3s.
The beneficial effects of the invention are as follows:
(1) The invention discovers that the use of the VCE resin and the Shandong Ruifeng MBS BL-126 has better synergistic effect compared with the use of the VCE resin and the processing aid CPE, can obviously improve the processing performance of CPVC injection molding pipe fittings, reduce the torque in the processing process, improve the processing mobility and greatly improve the comprehensive performance of CPVC injection molding pipe fittings;
(2) The chlorinated VCE resin has good compatibility with CPVC, can improve the chlorine content of CPVC products, and is very beneficial to improving the flame retardance of CPVC injection-molded pipe fittings;
(3) The invention also adds a small amount of petroleum resin into the CPVC resin system, thereby further improving the comprehensive performance of CPVC.
Detailed Description
The present invention will now be described in further detail with reference to examples.
CPVC resin adopted in the following examples of the invention is injection molding grade, and the chlorine content is 67% -68%.
The functional modifier used in the following examples of the present invention was an impact modifier VCE resin manufactured by New Material technology Co., ltd. Without tin Hong Hui.
The petroleum resin used in the following examples of the present invention is a C5 petroleum resin.
The stabilizer used in the following examples of the present invention was methyl tin mercaptide YT-181.
The internal lubricant used in the following examples of the present invention is calcium stearate.
The external lubricant used in the following examples of the present invention is a mixture of OPE wax and PE wax.
The impact modifier used in the following examples of the present invention is Shandong Ruifeng MBS BL-126.
The high impact CPVC injection molding pipe fittings in the following examples of the invention are prepared according to the following steps:
(1) According to the formula amount, the raw materials are added into a hot mixing pot of a high-low speed mixing unit to be heated and mixed at a high speed, the mixing speed is 900-1000r/min, the temperature of the hot mixing pot is increased to 110-120 ℃ within 10-12 min, and then the mixture is placed into a cold mixing pot to be stirred and cooled to the room temperature, so that CPVC dry mixed materials are obtained;
(2) Extruding and granulating the dry blend by a double-screw extruder to obtain CPVC granules;
(3) And (3) sampling the CPVC particles through an injection molding machine to obtain the injection molded pipe fitting.
In the following examples of the invention, the screw extrusion granulation process parameters were: the feeding speed of the twin-screw extruder was 25rpm; the rotation speed of the twin-screw extruder is 30rpm; the temperature of the twin-screw extruder is controlled by a partition, the temperature of the first region is 172-178 ℃, the temperature of the second region is 185-190 ℃, the temperature of the third region is 190-195 ℃, the temperature of the fourth region is 193-198 ℃, the traction speed is 1-2m/min, the grain cutting mode adopts water-cooled grain cutting, and the grain length is controlled to be about 4mm.
In the following embodiments of the present invention, the sample processing parameters of the injection molding machine are as follows: the temperature of the injection molding machine charging barrel is controlled by areas, wherein the temperature of a first area is 170-175 ℃, the temperature of a second area is 172-175 ℃, the temperature of a third area is 175-180 ℃, the temperature of a fourth area is 180-185 ℃, and the temperature of a nozzle is 190-195 ℃; back pressure is 0-5bar; the die closing time of the injection molding machine is 1-3s; injecting CPVC melt in a molten state into a mold through a nozzle, wherein the glue injection speed is 55-80% of the maximum speed, and the glue injection pressure is 50-70bar; the pressure maintaining pressure is 55-60bar, and the pressure maintaining time is 2-5s; the cooling time is 2-5s; the mold opening time is 1-4s; the demolding time is 1-3s.
Example 1
The high-impact CPVC injection molding pipe fitting comprises the following components in parts by weight:
CPVC resin 100 parts
1 part of functional modifier
Petroleum resin 0.1 parts
3.5 parts of stabilizer
1 part of internal lubricant
External lubricant 2 parts
Impact modifier 6 parts
Inorganic filler 5 parts
Pigment 0.3 parts.
Example 2
The high-impact CPVC injection molding pipe fitting comprises the following components in parts by weight:
CPVC resin 100 parts
3 parts of functional modifier
Petroleum resin 0.5 parts
3 parts of stabilizer
Internal lubricant 2 parts
3.0 parts of external lubricant
10 parts of impact modifier
Inorganic filler 7 parts
Pigment 0.3 parts.
Example 3
The high-impact CPVC injection molding pipe fitting comprises the following components in parts by weight:
CPVC resin 100 parts
1.5 parts of functional modifier
Petroleum resin 0.2 parts
3.2 parts of stabilizer
1.2 parts of internal lubricant
1.5 parts of external lubricant
Impact modifier 7 parts
Inorganic filler 5 parts
Pigment 0.6 parts.
Example 4
The high-impact CPVC injection molding pipe fitting comprises the following components in parts by weight:
CPVC resin 100 parts
2 parts of functional modifier
Petroleum resin 0.3 parts
3.5 parts of stabilizer
1.6 parts of internal lubricant
2.4 parts of external lubricant
Impact modifier 8 parts
3 parts of inorganic filler
Pigment 0.3 parts.
Example 5
The high-impact CPVC injection molding pipe fitting comprises the following components in parts by weight:
CPVC resin 100 parts
3 parts of functional modifier
Petroleum resin 0.5 parts
Stabilizer 4 parts
1.8 parts of internal lubricant
2.7 parts of external lubricant
Impact modifier 9 parts
Inorganic filler 6 parts
Pigment 0.5 parts.
Example 6
The high-impact CPVC injection molding pipe fitting comprises the following components in parts by weight:
CPVC resin 100 parts
1 part of functional modifier
Petroleum resin 0.3 parts
3.5 parts of stabilizer
1 part of internal lubricant
External lubricant 2 parts
Impact modifier 6 parts
Inorganic filler 5 parts
Pigment 0.3 parts.
Example 7
The high-impact CPVC injection molding pipe fitting comprises the following components in parts by weight:
CPVC resin 100 parts
1 part of functional modifier
Petroleum resin 0.5 parts
3.5 parts of stabilizer
1 part of internal lubricant
External lubricant 2 parts
Impact modifier 6 parts
Inorganic filler 5 parts
Pigment 0.3 parts.
Comparative example 1 is the same as example 1 except that no petroleum resin was added in comparative example 1.
Comparative example 2 is the same as example 1 except that comparative example 2 uses impact modifier CPE instead of Shandong Ruifeng MBS BL-126.
Comparative example 3 the same as example 1 was carried out, except that comparative example 3 used a processing aid ACR instead of the functional modifier VCE resin.
Performance test:
the high impact CPVC injection molded pipe obtained in examples 1-7 and comparative examples 1-2 were tested for vicat softening temperature and impact properties and their rheological torque, wherein:
vicat softening temperature was tested according to standard GB/T8802-2001;
the notched impact performance of the cantilever beam is tested according to the standard GB/T1843-2008;
drop hammer impact performance was tested according to standard GB/T14153-2002;
the rheological torque was measured using a rheometer at 185℃with a torque of 30rpm and a charge of 57g.
The specific test results are shown in Table 1:
TABLE 1
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (4)
1. The high-impact CPVC injection molding pipe fitting is characterized by comprising the following components in parts by weight:
the CPVC resin is injection molding grade, and the chlorine content is 67% -68%;
the functional modifier is impact modifier VCE resin produced by tin-free Hong Hui new material technology Co., ltd;
the petroleum resin is C5 petroleum resin;
the stabilizer is methyl tin mercaptide YT-181;
the internal lubricant is calcium stearate;
the external lubricant is a mixture of OPE wax and PE wax;
the impact modifier is Shandong Ruifeng MBS BL-126.
2. The high impact CPVC injection molded pipe of claim 1, prepared by the steps of:
(1) According to the formula amount, the raw materials are added into a hot mixing pot of a high-low speed mixing unit to be heated and mixed at a high speed, the mixing speed is 900-1000r/min, the temperature of the hot mixing pot is increased to 110-120 ℃ within 10-12 min, and then the mixture is placed into a cold mixing pot to be stirred and cooled to the room temperature, so that CPVC dry mixed materials are obtained;
(2) Extruding and granulating the CPVC dry mixed material by a double-screw extruder to obtain CPVC granules;
(3) And (3) sampling the CPVC particles through an injection molding machine to obtain the injection molded pipe fitting.
3. The high impact CPVC injection molded pipe of claim 2, wherein said twin screw extrusion pelletization process parameters are: the feeding speed of the twin-screw extruder was 25rpm; the rotation speed of the twin-screw extruder is 30rpm; the temperature of the twin-screw extruder is controlled by a partition, the temperature of the first region is 172-178 ℃, the temperature of the second region is 185-190 ℃, the temperature of the third region is 190-195 ℃, the temperature of the fourth region is 193-198 ℃, the traction speed is 1-2m/min, the grain cutting mode adopts water-cooled grain cutting, and the grain length is controlled to be 4mm.
4. The high impact CPVC injection molded pipe of claim 2, wherein said injection molding machine-like process parameters are: the temperature of the injection molding machine charging barrel is controlled by areas, wherein the temperature of a first area is 170-175 ℃, the temperature of a second area is 172-175 ℃, the temperature of a third area is 175-180 ℃, the temperature of a fourth area is 180-185 ℃, and the temperature of a nozzle is 190-195 ℃; back pressure is 0-5bar; the die closing time of the injection molding machine is 1-3s;
injecting CPVC melt in a molten state into a mold through a nozzle, wherein the glue injection speed is 55-80% of the maximum speed, and the glue injection pressure is 50-70bar; the pressure maintaining is 55-60bar, the pressure maintaining time is 2-5s, and the cooling time is 2-5s; the mold opening time is 1-4s; the demolding time is 1-3s.
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| CN202111047808.1A CN113652045B (en) | 2021-09-08 | 2021-09-08 | High-impact CPVC injection molding pipe fitting and preparation method thereof |
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| CN202111047808.1A CN113652045B (en) | 2021-09-08 | 2021-09-08 | High-impact CPVC injection molding pipe fitting and preparation method thereof |
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| CN113652045B true CN113652045B (en) | 2023-06-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993571A (en) * | 2009-08-10 | 2011-03-30 | 大义塑胶(香港)有限公司 | Modifier for processing polyvinyl chloride |
| CN103665684B (en) * | 2012-09-19 | 2015-10-21 | 中国石油化工股份有限公司 | Injection moulding high workability CPVC composition |
| CN103923422B (en) * | 2014-03-25 | 2016-05-18 | 山东高信化学股份有限公司 | A kind of corrosion-resistant, resistant to elevated temperatures industrial CPVC and preparation method thereof |
| CN108659421B (en) * | 2017-03-31 | 2021-04-13 | 中国石油化工股份有限公司 | Chlorinated polyvinyl chloride composition and pipe preparation method |
| CN109535618A (en) * | 2018-11-13 | 2019-03-29 | 新疆兵团现代绿色氯碱化工工程研究中心(有限公司) | A kind of high stability CPVC tubing and its mixing method |
| CN109627657B (en) * | 2018-12-25 | 2021-02-02 | 青岛海尔新材料研发有限公司 | Acrylonitrile-styrene copolymer/chlorinated polyvinyl chloride alloy material and preparation method thereof |
| CN111471246B (en) * | 2020-04-03 | 2021-11-02 | 无锡洪汇新材料科技股份有限公司 | Environment-friendly toughening type PVC electrical casing processing modifier and preparation method thereof |
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