CN111484687A - Impact-resistant toughened PVC pipe fitting and preparation method thereof - Google Patents
Impact-resistant toughened PVC pipe fitting and preparation method thereof Download PDFInfo
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- CN111484687A CN111484687A CN202010323371.9A CN202010323371A CN111484687A CN 111484687 A CN111484687 A CN 111484687A CN 202010323371 A CN202010323371 A CN 202010323371A CN 111484687 A CN111484687 A CN 111484687A
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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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- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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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
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/53—Core-shell polymer
Abstract
The invention discloses an impact-resistant toughened PVC pipe fitting and a preparation method thereof, wherein the impact-resistant toughened PVC pipe fitting is prepared from the following raw materials, by weight, 100 parts of SG-7 type PVC resin, 4.2-4.9 parts of H L-60 type processing aid, 2-5 parts of MBS-66 type impact modifier, 6.1-6.9 parts of calcium-zinc heat stabilizer, 11.5-13.8 parts of PCC-P type superfine calcium carbonate, 2.1-2.8 parts of SR-240 type titanium dioxide, 4.2-4.9 parts of DS-65 type dioctyl ester and 0.6-0.8 part of L A-W95 type lubricant.
Description
Technical Field
The invention relates to the technical field of PVC pipe fitting production, in particular to an impact-resistant toughened PVC pipe fitting, and more particularly relates to a preparation method of the impact-resistant toughened PVC pipe fitting.
Background
The Chinese patent with the application number of 201510562894.8, named as 'impact-resistant toughened PVC pipe fitting and a preparation method thereof', is prepared by adding seven raw materials of PVC resin, organic silicon processing aid, stabilizer, superfine calcium carbonate, titanium dioxide, dioctyl ester and lubricant at the high temperature of 125-135 ℃. According to the application, the ACR and the MBS are replaced by the organic silicon processing aid, so that the impact resistance of the PVC pipe is improved, the production cost is reduced, but the MBS is less used, so that the produced product has poor compatibility, and the compatibility is expressed in tensile impact strength, simple beam impact property and elongation at break.
However, the PVC pipe prepared in this way is not transparent. Can bring a great deal of inconveniences for daily use, if the foreign matter can appear in the pipeline, influence the heat dissipation of circuit, because PVC pipeline is opaque during the installation, can't see clearly whether the circuit is neat.
In order to improve the impact resistance and toughness of the PVC pipe, it is necessary to provide an impact resistant toughened PVC pipe and a method for preparing the same.
Disclosure of Invention
The invention provides an impact-resistant toughened PVC pipe fitting and a preparation method thereof, aiming at overcoming at least one defect in the prior art. The impact resistance and the toughness are improved, and meanwhile, the transparency of the pipe fitting can be improved.
An impact-resistant toughened PVC pipe fitting is composed of the following raw materials, by weight, 100 parts of SG-7 type PVC resin, 4-5 parts of H L-60 type processing aid, 2-5 parts of MBS-66 type impact modifier, 6-7 parts of calcium-zinc heat stabilizer, 11-14 parts of PCC-P type superfine calcium carbonate, 2-3 parts of SR-240 type titanium dioxide, 4-5 parts of DS-65 type dioctyl ester and 0.6-0.8 part of lubricant.
The processing aid of H L-60 type and the impact modifier of MBS-66 type are used together, so that the prepared PVC pipe fitting has better transparency.
MBS-66 has excellent impact resistance and good thermal formability.
After MBS-66 is added, the elastomer particles of the impact modifier can reduce the stress caused by the total silver streaks, and the deformation and the shear band of the particles are utilized to prevent the silver streaks from expanding and increasing and absorb the impact energy transmitted into the material, thereby achieving the aim of impact resistance.
The impact modifier MBS is a core-shell copolymer which is prepared by grafting styrene butadiene latex with MMA and then salting out and drying, and the impact strength and the comprehensive performance of the modified PVC can be improved by using the modified PVC, so that the modified PVC has better transparency due to the similar refractive index with the PVC.
The solubility parameter of MBS is 9.4-9.5, and is close to that of PVC, so that the MBS has good compatibility with PVC. The MBS has good impact property and transparency, and has little influence on other properties of the resin, such as tensile strength, elongation at break and the like, while improving the impact property.
The calcium-zinc heat stabilizer has quite good heat stability, light stability and transparency.
The application selects the PCC-P type superfine calcium carbonate, has small grain diameter and avoids the problem of secondary agglomeration of nano powder.
The L A-W95 type lubricant is used, so that the processing torque can be effectively reduced, the production energy consumption is reduced, the smoothness and the gloss of the PVC pipe fitting are improved, the aging resistance of the product can be improved, and the precipitation resistance of the product is excellent.
Further, the impact-resistant toughened PVC pipe fitting is composed of the following raw materials, by weight, 100 parts of SG-7 type PVC resin, 4.7 parts of H L-60 type processing aid, 3 parts of MBS-66 type impact modifier, 6.2 parts of calcium-zinc heat stabilizer, 12.5 parts of PCC-P type superfine calcium carbonate, 2.6 parts of SR-240 type titanium dioxide, 4.4 parts of DS-65 type dioctyl ester and 0.7 part of L A-W95 type lubricant.
Further, the lubricant consists of 0.45-0.75 part of polyethylene wax and 0.05-0.15 part of stearic acid. The surface of the superfine calcium carbonate can be used as a toughening agent after being treated by stearic acid, and has a coupling effect with MBS.
Also provides a preparation method of the impact-resistant toughened PVC pipe fitting, which comprises the following steps:
s1, mixing SG-7 type PVC resin, H L-60 type processing aid and MBS-66 type impact modifier according to the weight parts of the raw materials, and uniformly stirring at a low speed to obtain mixed slurry, wherein the rotating speed of the low-speed stirring is 200-400 r/min;
s2, sequentially adding a calcium-zinc heat stabilizer, PCC-P type superfine calcium carbonate, SR-240 type titanium dioxide, DS-65 type dioctyl ester and L A-W95 type lubricant into the mixed slurry, stirring at a high speed, cooling to 55 ℃, and discharging, wherein the rotating speed of the high-speed stirring is 800-1200 r/min;
and S3, injection molding the cooled material, and cooling.
The low-speed stirring enables the SG-7 type PVC resin to fully absorb H L-60 type processing aids and MBS-66 type impact modifiers, the full low-speed stirring is beneficial to improving the impact strength and transparency of the PVC pipe fitting, the high-speed stirring enables the dispersibility of materials to be good, and the problems of low uniformity, dead angles and the like caused by different specific gravities of the materials are avoided.
Further, the stirring temperature of the S1 and the S2 is 105-115 ℃.
Further, the stirring time of S1 and S2 is 20-30 min.
Compared with the prior art, the invention has the beneficial effects that:
the impact-resistant toughened PVC pipe fitting and the preparation method thereof provided by the invention have the advantages that the produced PVC pipe fitting is high in impact strength, the production quality of the PVC pipe fitting is high, and the prepared PVC pipe fitting has better transparency due to the matched use of the H L-60 type processing aid and the MBS-66 type impact modifier.
Compared with the existing preparation method of the PVC pipe fitting, the toughness, tensile strength and fracture strength of the PVC pipe fitting are improved.
According to the invention, the MBS is adopted, so that the impact resistance of the PVC pipe fitting is improved, the production cost is reduced, the preparation method is simple, and the production labor cost of the PVC pipe fitting is reduced.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example 1
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
4.2 portions of H L-60 type processing aid
MBS-66 type impact modifier 5 parts
6.1 parts of calcium-zinc heat stabilizer
11.5 parts of PCC-P type superfine calcium carbonate
2.1 portions of SR-240 type titanium dioxide
4.2 portions of DS-65 type dioctyl ester
L A-W95 parts of lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 115 ℃, stirring for 20min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
Example 2
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
4.9 portions of H L-60 type processing aid
MBS-66 type impact modifier 5 parts
6.9 parts of calcium-zinc heat stabilizer
13.8 parts of PCC-P type superfine calcium carbonate
2.8 portions of SR-240 type titanium dioxide
4.9 portions of DS-65 type dioctyl ester
L A-W95 parts of lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 115 ℃, stirring for 20min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
Example 3
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
4.5 portions of H L-60 type processing aid
MBS-66 type impact modifier 3 parts
6.5 parts of calcium-zinc heat stabilizer
12 portions of PCC-P type superfine calcium carbonate
2.5 portions of SR-240 type titanium dioxide
4.6 portions of DS-65 type dioctyl ester
L A-W95 parts of lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 115 ℃, stirring for 20min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
Example 4
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
4.5 portions of H L-60 type processing aid
MBS-66 type impact modifier 3 parts
6.5 parts of calcium-zinc heat stabilizer
12 portions of PCC-P type superfine calcium carbonate
2.5 portions of SR-240 type titanium dioxide
4.6 portions of DS-65 type dioctyl ester
L A-W95 parts of lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 105 ℃, stirring for 20min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
Example 5
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
4.5 portions of H L-60 type processing aid
MBS-66 type impact modifier 3 parts
6.5 parts of calcium-zinc heat stabilizer
12 portions of PCC-P type superfine calcium carbonate
2.5 portions of SR-240 type titanium dioxide
4.6 portions of DS-65 type dioctyl ester
L A-W95 parts of lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 110 ℃, stirring for 20min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
Example 6
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
4.5 portions of H L-60 type processing aid
MBS-66 type impact modifier 3 parts
6.5 parts of calcium-zinc heat stabilizer
12 portions of PCC-P type superfine calcium carbonate
2.5 portions of SR-240 type titanium dioxide
4.6 portions of DS-65 type dioctyl ester
L A-W95 parts of lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 115 ℃, stirring for 25min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
Example 7
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
4.5 portions of H L-60 type processing aid
MBS-66 type impact modifier 3 parts
6.5 parts of calcium-zinc heat stabilizer
12 portions of PCC-P type superfine calcium carbonate
2.5 portions of SR-240 type titanium dioxide
4.6 portions of DS-65 type dioctyl ester
L A-W95 parts of lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 115 ℃, stirring for 30min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
Comparative example 1
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
0 portion of H L-60 type processing aid
MBS-66 type impact modifier 5 parts
5 parts of calcium-zinc heat stabilizer
10 portions of PCC-P type superfine calcium carbonate
2 portions of SR-240 type titanium dioxide
DS-65 type dioctyl ester 4 parts
L A-W95 parts of lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 115 ℃, stirring for 20min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
Comparative example 2
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
5 parts of H L-60 type processing aid
MBS-66 type impact modifier 5 parts
0 portion of calcium-zinc heat stabilizer
10 portions of PCC-P type superfine calcium carbonate
2 portions of SR-240 type titanium dioxide
DS-65 type dioctyl ester 4 parts
L A-W95 parts of lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 115 ℃, stirring for 20min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
Comparative example 3
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
5 parts of H L-60 type processing aid
MBS-66 type impact modifier 3 parts
Calcium zinc heat stabilizer 8 parts
0 portion of PCC-P type superfine calcium carbonate
SR-240 type titanium dioxide 4 parts
6 portions of DS-65 type dioctyl ester
L A-W95 parts of lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 115 ℃, stirring for 20min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
Comparative example 4
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
3.5 parts of H L-60 type processing aid
MBS-66 type impact modifier 2 parts
5 parts of calcium-zinc heat stabilizer
10 portions of PCC-P type superfine calcium carbonate
2 portions of SR-240 type titanium dioxide
DS-65 type dioctyl ester 4 parts
0 part of L A-W95 type lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 115 ℃, stirring for 20min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
Comparative example 5
A preparation method of an impact-resistant toughened PVC pipe fitting comprises the following steps:
100 portions of SG-7 type PVC resin
6 parts of organic silicon processing aid
0 portion of MBS-66 type impact modifier
Calcium zinc heat stabilizer 8 parts
15 portions of PCC-P type superfine calcium carbonate
SR-240 type titanium dioxide 4 parts
6 portions of DS-65 type dioctyl ester
L A-W95 parts of lubricant
Adding the weighed raw materials into a high-speed mixer, stirring, controlling the temperature of the high-speed mixer at 115 ℃, stirring for 20min, and discharging when the molten material is cooled to 55 ℃;
and step two, injecting the cooled material into an injection molding machine for injection molding, and cooling to obtain the PVC pipe fitting.
The performance test data and the industry standard of the PVC pipe fittings prepared in the embodiments 1-9 and the comparative examples 1-5 are subjected to performance test, and the measured data and the industry standard of the PVC pipe fittings are compared, and the results are shown in Table 1.
The transparency means whether the circuit in the pipe can be seen under normal illumination.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. An impact-resistant toughened PVC pipe fitting is characterized by comprising the following raw materials, by weight, 100 parts of SG-7 type PVC resin, 4.2-4.9 parts of H L-60 type processing aid, 2-5 parts of MBS-66 type impact modifier, 6.1-6.9 parts of calcium-zinc heat stabilizer, 11.5-13.8 parts of PCC-P type superfine calcium carbonate, 2.1-2.8 parts of SR-240 type titanium pigment, 4.2-4.9 parts of DS-65 type dioctyl ester and 0.6-0.8 part of L A-W95 type lubricant.
2. The impact-resistant toughened PVC pipe fitting according to claim 1 is characterized by comprising, by weight, 100 parts of SG-7 type PVC resin, 4.7 parts of H L-60 type processing aid, 3 parts of MBS-66 type impact modifier, 6.2 parts of calcium-zinc heat stabilizer, 12.5 parts of PCC-P type ultrafine calcium carbonate, 2.6 parts of SR-240 type titanium dioxide, 4.4 parts of DS-65 type dioctyl ester, and 0.7 part of L A-W95 type lubricant.
3. The impact resistant toughened PVC pipe fitting according to claim 1, wherein said lubricant consists of 0.45 to 0.75 parts of polyethylene wax and 0.05 to 0.15 parts of stearic acid.
4. The preparation method of the impact-resistant toughened PVC pipe fitting is characterized by comprising the following steps of:
s1, mixing SG-7 type PVC resin, H L-60 type processing aid and MBS-66 type impact modifier according to the weight parts of the raw materials, and uniformly stirring at a low speed to obtain mixed slurry, wherein the rotating speed of the low-speed stirring is 200-400 r/min;
s2, sequentially adding a calcium-zinc heat stabilizer, PCC-P type superfine calcium carbonate, SR-240 type titanium dioxide, DS-65 type dioctyl ester and L A-W95 type lubricant into the mixed slurry, stirring at a high speed of 800-1200 r/min, cooling, and discharging;
and S3, injection molding the cooled material, and cooling.
5. The method for preparing the impact-resistant toughened PVC pipe fitting according to claim 4, wherein the stirring temperature of S1 and S2 is 105-115 ℃.
6. The method for preparing the impact-resistant toughened PVC pipe fitting according to claim 4 is characterized in that the stirring time of S1 and S2 is 20-30 min.
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| CN112279556A (en) * | 2020-10-20 | 2021-01-29 | 浙江中财管道科技股份有限公司 | High-impact-resistance integral H-tube structural part |
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| CN111040344A (en) * | 2019-12-31 | 2020-04-21 | 永川区嵘鑫塑料厂 | Antistatic heat-resistant high-transparency PVC/CPVC alloy pipe and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112279556A (en) * | 2020-10-20 | 2021-01-29 | 浙江中财管道科技股份有限公司 | High-impact-resistance integral H-tube structural part |
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