CN110483918B - UV-resistant environment-friendly PVC door seal material formula and preparation method thereof - Google Patents

UV-resistant environment-friendly PVC door seal material formula and preparation method thereof Download PDF

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CN110483918B
CN110483918B CN201910803447.5A CN201910803447A CN110483918B CN 110483918 B CN110483918 B CN 110483918B CN 201910803447 A CN201910803447 A CN 201910803447A CN 110483918 B CN110483918 B CN 110483918B
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plasticizer
door seal
seal material
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CN110483918A (en
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严娟
田海明
答镇
储贻建
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Anhui Higasket Plastics Co ltd
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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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C08K5/101—Esters; Ether-esters of monocarboxylic acids
    • C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/15—Heterocyclic compounds having oxygen in the ring
    • C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
    • C08K5/1515—Three-membered rings
    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/16—Solid spheres
    • C08K7/18—Solid spheres inorganic
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/08—Parts formed wholly or mainly of plastics materials
    • F25D23/082—Strips
    • F25D23/087—Sealing strips
    • 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
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Sealing Material Composition (AREA)

Abstract

The invention relates to the technical field of high polymer materials, in particular to a formula and a preparation method of a UV-resistant environment-friendly PVC door seal material, wherein the formula of the UV-resistant environment-friendly PVC door seal material comprises the following substances in parts by weight: 100 parts by weight of PVC; 55-95 parts by weight of a plasticizer; 20-70 parts by weight of a filler; wherein the plasticizer comprises a first plasticizer which is PETM. The UV-resistant environment-friendly PVC door seal material provided by the invention has better low-temperature flexibility, the processing temperature is 5-10 ℃ lower than that of the traditional DOTP formula, the migration resistance effect is good, the material cost is reduced, and the UV-resistant environment-friendly PVC door seal material is safe and environment-friendly and has good application prospect.

Description

UV-resistant environment-friendly PVC door seal material formula and preparation method thereof
Technical Field
The invention relates to the technical field of high polymer materials, and particularly relates to a UV-resistant environment-friendly PVC door seal material formula and a preparation method thereof.
Background
The door seal for refrigerator, freezer and other cold storage device is one kind of fitting for sealing between the door and the box and consists of two parts, one part is soft polymer casing and the other part is magnetic adhesive tape. At present, polymer jackets of door seals used on refrigeration devices such as refrigerators and the like basically adopt soft PVC (polyvinyl chloride), and have the advantages of good flexibility, electrical insulation, stable chemical performance, good processability, low cost and the like.
At present, the composite plasticizer used for the door seal (soft PVC) of the refrigerator and freezer is mainly compounded by environment-friendly composite plasticizers such as ESO (epoxidized soybean oil), DOS (dioctyl sebacate), DOTP (dioctyl terephthalate), TOTM (tri (2-ethylhexyl) trimellitate), polyester and the like, and the existing environment-friendly composite plasticizer has the following disadvantages: 1. the environment-friendly composite plasticizer has small molecular weight, is easy to migrate when being applied to PVC door seal products, and has high thermal volatility; 2. the UV resistance is poor, and the use requirement can be met only by compounding an anti-UV absorbent in PVC.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a formula of a UV-resistant environment-friendly PVC door seal material, which has the advantages of safety, environmental protection and good UV resistance.
The invention also aims to provide a preparation method of the UV-resistant environment-friendly PVC door seal material.
The invention provides a UV-resistant environment-friendly PVC door seal material formula, which comprises the following substances in parts by weight:
100 parts by weight of PVC;
55-95 parts by weight of a plasticizer;
20-70 parts by weight of a filler;
wherein the plasticizer comprises a first plasticizer which is PETM.
The second aspect of the invention provides a preparation method of the UV-resistant environment-friendly PVC door seal material, which comprises the following steps:
(1) adding PVC into a high-speed mixing pot for stirring, slowly adding a plasticizer which is heated to 45-50 ℃ into the high-speed mixing pot, completely adding the plasticizer when the temperature of the high-speed mixing pot is raised to 95-100 ℃, adding a filling agent when the temperature of the high-speed mixing pot is raised to 105-110 ℃, and discharging when the temperature of the mixing pot is raised to 115-125 ℃ to obtain mixed powder;
(2) and conveying the mixed powder into a double-screw extruder or an internal mixer for mixing, conveying the mixed material into a single-screw molding extruder for extrusion molding, and finally carrying out hot cutting to obtain the UV-resistant environment-friendly PVC door seal material.
Through the technical scheme, the invention has the following technical effects:
(1) the plasticizer has good compatibility with PVC, and the plasticizing efficiency is high;
(2) the molecular weight of the plasticizer is larger than that of DOTP, and the obtained product has good mobility and low thermal volatility;
(3) the plasticizer has the anti-UV capability, and the prepared PVC product has good UV resistance, so that the addition of the anti-UV agent in PVC can be cancelled;
in conclusion, the plasticizer added into PVC has good low-temperature flexibility, the processing temperature is 5-10 ℃ lower than that of the traditional DOTP formula, the migration resistance is good, the material cost is reduced, and the plasticizer is safe and environment-friendly and has good application prospect.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a UV-resistant environment-friendly PVC door seal material formula, which comprises the following substances in parts by weight:
100 parts by weight of PVC;
55-95 parts by weight of a plasticizer;
20-70 parts by weight of a filler;
wherein the plasticizer comprises a first plasticizer which is PETM.
The inventor of the invention finds that PETM has good plasticizing performance, good compatibility with PVC and high plasticizing efficiency on PVC; secondly, PETM has larger molecular weight, and is added into PVC as a plasticizer, so that the plasticity of PVC can be improved, and the obtained PVC product has good mobility and low thermal volatility; in addition, because PETM has good UV resistance, the PETM can also improve the UV resistance of PVC products and reduce or eliminate the addition of UV resistant agents in PVC.
The PETM can be used in combination with other existing plasticizers (hereinafter referred to as secondary plasticizers) to further improve the plasticizing effect on PVC, so that the ratio of the PETM to the secondary plasticizers is an important factor influencing the performance of the composite plasticizer, and preferably, the plasticizers further comprise at least one secondary plasticizer selected from ESO, polyester plasticizer, TOTM and DOTP.
The weight ratio of the PETM to the second plasticizer is an important factor influencing the plasticizing effect of the plasticizer, and under the preferable condition, the weight ratio of the PETM to the second plasticizer is 1: 0.33 to 1, and more preferably 1: 0.36 to 0.75, most preferably 1: 0.4.
in order to further improve the plasticizing effect of the composite plasticizer on PVC, the formula of the UV-resistant environment-friendly PVC door seal material comprises the following substances in parts by weight under the preferable conditions:
100 parts by weight of PVC;
60-85 parts of a plasticizer;
20 to 70 parts by weight of a filler.
Preferably, the filler is calcium carbonate, and the particle size of the filler is 10-15 μm.
In order to further improve the stability and the processing performance of the PVC, at least one of a stabilizer, a lubricant and an antibacterial mildew preventive is preferably included in the PVC.
Preferably, the stabilizing agent is at least one selected from zinc stearate, calcium stearate, hydrotalcite, pentaerythritol, phosphite ester, beta-diketone and 1010 antioxidant; further preferably, the addition amount of the stabilizer is 1-5 wt% of the weight of the PVC.
Preferably, the lubricant is at least one selected from stearic acid, paraffin wax and PE wax; more preferably, the addition amount of the lubricant is 0.2-1 wt% of the weight of the PVC.
Preferably, the antibacterial mildew inhibitor is at least one selected from DCOIT, ZPT and OIT; more preferably, the addition amount of the antibacterial and mildewproof agent is 0.2-1 wt% of the weight of the PVC.
The third aspect of the invention provides a preparation method of the UV-resistant environment-friendly PVC door seal material, which comprises the following steps:
(1) adding PVC into a high-speed mixing pot for stirring, slowly adding a plasticizer which is heated to 45-50 ℃ into the high-speed mixing pot, completely adding the plasticizer when the temperature of the high-speed mixing pot is raised to 95-100 ℃, adding a filling agent when the temperature of the high-speed mixing pot is raised to 105-110 ℃, and discharging when the temperature of the mixing pot is raised to 115-125 ℃ to obtain mixed powder;
(2) and conveying the mixed powder into a double-screw extruder or an internal mixer for mixing, conveying the mixed material into a single-screw molding extruder for extrusion molding, and finally carrying out hot cutting to obtain the UV-resistant environment-friendly PVC door seal material.
Under the preferable conditions, in the step (2), the mixing temperature is 95-140 ℃, and the extrusion molding temperature is 100-140 ℃.
In one embodiment of the present invention, the method for preparing the refrigerator door seal includes: the UV-resistant environment-friendly PVC door seal material is extruded out of a door seal rubber sleeve by a single-screw door seal extruder, and then a finished door seal is prepared after magnetic penetration and welding.
The present invention will be described in further detail with reference to examples.
In the following examples PETM is the esterification product of valeric acid and pentaerythritol, having a molecular weight of 472g/mol, a viscosity of 35 mPas (RT),200 mPas (-10 ℃ C.), available from Cytostan; ESO is epoxidized soybean oil, purchased from Jia Australia; PVC was purchased from Taiwan plastics, model number S-70, polyester plasticizer, model number W-8000.
Example 1
The formula of the UV-resistant environment-friendly PVC door seal material comprises the following substances in parts by weight:
100 parts by weight of PVC;
50 parts of PETM;
ESO 20 parts by weight;
5 parts of a stabilizer;
1 part by weight of a lubricant;
1 part of antibacterial mildew preventive;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
The preparation method of the UV-resistant environment-friendly PVC door seal material comprises the following steps:
(1) adding the lubricant, the PVC, the stabilizer and the antibacterial mildew preventive into a high-speed mixing pot according to the weight ratio, mixing at a low speed for 1-3min, then putting all the composite plasticizers heated to 50 ℃ into a composite plasticizer storage cylinder according to the formula ratio, slowly adding the composite plasticizers into the high-speed mixing pot until the composite plasticizers are completely added at 95-100 ℃, adding the formula ratio filler when the composite plasticizers are mixed to 105-110 ℃, and discharging when the temperature of the mixing pot is increased to 115-120 ℃ to obtain dry and uniform mixed powder;
(2) and (2) conveying the mixed powder into an opened double-screw extruder or internal mixer, controlling the extrusion processing temperature within 110-125 ℃, conveying the mixed material into a single-screw molding extruder, controlling the molding temperature within 110-125 ℃, and finally carrying out hot cutting to obtain the UV-resistant environment-friendly PVC door seal material formula.
Example 2
The process of example 1 is followed except that the weight ratio of the PETM to the ESO is: 1: 0.75; the method comprises the following specific steps:
the formula of the UV-resistant environment-friendly PVC door seal material comprises the following substances in parts by weight:
100 parts by weight of PVC;
40 parts of PETM;
30 parts of ESO;
5 parts by weight of zinc stearate;
1 part by weight of PE wax;
1 part by weight of DCOIT;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
The preparation method of the UV-resistant environment-friendly PVC door seal material comprises the following steps:
(1) adding a lubricant, PVC, a stabilizer and an antibacterial mildew preventive into a high-speed mixing pot according to the weight ratio, mixing at a low speed for 1-3min, then putting all the composite plasticizers heated to 50 ℃ into a composite plasticizer storage cylinder according to the formula ratio, slowly adding the composite plasticizers into the high-speed mixing pot until the temperature is 100 ℃, adding all the composite plasticizers into the high-speed mixing pot, mixing to 105-110 ℃, adding a formula ratio filler, and discharging when the temperature of the mixing pot is raised to 115-120 ℃ to obtain dry and uniform mixed powder;
(2) and (3) conveying the mixed powder into an opened double-screw extruder or internal mixer, controlling the extrusion processing temperature within 125-140 ℃, conveying the mixed material into a single-screw molding extruder, wherein the molding temperature is 100-110 ℃, and finally carrying out hot cutting to obtain the UV-resistant environment-friendly PVC door seal material formula.
Example 3
The process of example 1 is followed except that the weight ratio of the PETM to the ESO is: 1: 0.33; the method comprises the following specific steps:
the formula of the UV-resistant environment-friendly PVC door seal material comprises the following substances in parts by weight:
100 parts by weight of PVC;
60 parts of PETM;
ESO 20 parts by weight;
5 parts by weight of zinc stearate;
1 part by weight of PE wax;
1 part by weight of DCOIT;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
The preparation method of the UV-resistant environment-friendly PVC door seal material comprises the following steps:
(1) adding a lubricant, PVC, a stabilizer and an antibacterial mildew preventive into a high-speed mixing pot according to the weight ratio, mixing at a low speed for 1-3min, then putting all the composite plasticizers heated to 45 ℃ into a composite plasticizer storage cylinder according to the formula ratio, slowly adding the composite plasticizers into the high-speed mixing pot until the composite plasticizers are completely added at 95 ℃, adding a formula ratio filler when the composite plasticizers are mixed to 105-110 ℃, and discharging when the temperature of the mixing pot is increased to 120-125 ℃ to obtain dry and uniform mixed powder;
(2) and (3) conveying the mixed powder into an opened double-screw extruder or internal mixer, controlling the extrusion processing temperature within 95-110 ℃, conveying the mixed material into a single-screw molding extruder, wherein the molding temperature is 125-140 ℃, and finally carrying out hot cutting to obtain the UV-resistant environment-friendly PVC door seal material formula.
Example 4
The process of example 1 is followed except that the weight ratio of the PETM to the ESO is: 1: 1; the method comprises the following specific steps:
the formula of the UV-resistant environment-friendly PVC door seal material comprises the following substances in parts by weight:
100 parts by weight of PVC;
30 parts of PETM;
30 parts of ESO;
5 parts by weight of zinc stearate;
1 part by weight of PE wax;
1 part by weight of DCOIT;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
The preparation method of the UV-resistant environment-friendly PVC door seal material is the same as that of example 1.
Example 5
The process of example 1 is followed except that the weight ratio of the PETM to the ESO is: 1: 0.55; the method comprises the following specific steps:
the formula of the UV-resistant environment-friendly PVC door seal material comprises the following substances in parts by weight:
100 parts by weight of PVC;
55 parts of PETM;
30 parts of ESO;
5 parts by weight of zinc stearate;
1 part by weight of PE wax;
1 part by weight of DCOIT;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
The preparation method of the UV-resistant environment-friendly PVC door seal material is the same as that of example 1.
Example 6
The method of example 1 is followed except that the second plasticizer is a polyester plasticizer (W-8000);
100 parts by weight of PVC;
50 parts of PETM;
20 parts by weight of polyester plasticizer (W-8000);
5 parts of a stabilizer;
1 part by weight of a lubricant;
1 part of antibacterial mildew preventive;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
Example 7
The process of example 2 was followed except that the second plasticizer was TOTM;
100 parts by weight of PVC;
40 parts of PETM;
30 parts of TOTM;
5 parts by weight of zinc stearate;
1 part by weight of PE wax;
1 part by weight of DCOIT;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
Example 8
The process of example 3 is followed except that the second plasticizer is DOTP;
100 parts by weight of PVC;
60 parts of PETM;
20 parts of DOTP;
5 parts by weight of zinc stearate;
1 part by weight of PE wax;
1 part by weight of DCOIT;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
Example 9
The process of example 1 was followed except that the second plasticizer was compounded with a polyester plasticizer (W-8000) and ESO;
100 parts by weight of PVC;
50 parts of PETM;
10 parts by weight of a polyester plasticizer (W-8000);
10 parts of ESO;
5 parts of a stabilizer;
1 part by weight of a lubricant;
1 part of antibacterial mildew preventive;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
Example 10
The process of example 1 was followed except that the second plasticizer was composed of TOTM and ESO;
100 parts by weight of PVC;
50 parts of PETM;
10 parts of TOTM;
10 parts of ESO;
5 parts of a stabilizer;
1 part by weight of a lubricant;
1 part of antibacterial mildew preventive;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
Example 11
The process of example 1 was followed except that the second plasticizer was composed of a polyester plasticizer (W-8000) and TOTM;
100 parts by weight of PVC;
50 parts of PETM;
12 parts by weight of a polyester plasticizer (W-8000);
TOTM 8 weight portions;
5 parts of a stabilizer;
1 part by weight of a lubricant;
1 part of antibacterial mildew preventive;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
Example 12
The formula of the UV-resistant environment-friendly PVC door seal material comprises the following substances in parts by weight:
100 parts by weight of PVC;
20 parts of PETM;
35 parts by weight of ESO;
5 parts by weight of zinc stearate;
p E wax 1 weight portions;
0.2 part by weight of DCOIT;
20 parts by weight of calcium carbonate microspheres (10-15 mu m).
The preparation method of the UV-resistant environment-friendly PVC door seal material is the same as that of example 1.
Example 13
The formula of the UV-resistant environment-friendly PVC door seal material comprises the following substances in parts by weight:
Figure BDA0002182966500000121
the preparation method of the UV-resistant environment-friendly PVC door seal material is the same as that of example 1.
Example 14
According to the method of example 1, except that the formula of the UV-resistant environment-friendly PVC door seal material does not contain ESO, the method comprises the following steps:
the formula of the UV-resistant environment-friendly PVC door seal material comprises the following substances in parts by weight:
100 parts by weight of PVC;
50 parts of PETM;
5 parts of a stabilizer;
1 part by weight of a lubricant;
1 part of antibacterial mildew preventive;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
Comparative example 1
PVC consists of the following substances in parts by weight:
100 parts by weight of PVC;
60 parts of DOTP;
10 parts of ESO;
1 part by weight of zinc stearate;
0.8 part of PE wax;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
And UV 5310.5 weight portions.
Comparative example 2
According to the method of example 1, except that the formula of the UV-resistant environment-friendly PVC door seal material does not contain PETM, the concrete steps are as follows:
the formula of the UV-resistant environment-friendly PVC door seal material comprises the following substances in parts by weight:
100 parts by weight of PVC;
50 parts by weight of ESO;
5 parts of a stabilizer;
1 part by weight of a lubricant;
1 part of antibacterial mildew preventive;
50 parts by weight of calcium carbonate microspheres (10-15 μm).
TABLE 1
Figure BDA0002182966500000131
Figure BDA0002182966500000141
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.

Claims (8)

1. The UV-resistant environment-friendly PVC door seal material is characterized by comprising the following substances in parts by weight:
100 parts by weight of PVC;
20-70 parts by weight of a first plasticizer;
20-35 parts by weight of a second plasticizer;
20-70 parts by weight of a filler;
wherein the plasticizer comprises a first plasticizer and a second plasticizer;
the first plasticizer is PETM, wherein the PETM is an esterification product of valeric acid and pentaerythritol, and the molecular weight is 472 g/mol;
the second plasticizer is selected from at least one of ESO, polyester plasticizer, TOTM and DOTP;
the weight ratio of the first plasticizer to the second plasticizer is 1: 0.33 to 1.
2. The UV-resistant environment-friendly PVC door seal material according to claim 1, is characterized by comprising the following substances in parts by weight:
100 parts by weight of PVC;
60-85 parts of a plasticizer;
20 to 70 parts by weight of a filler.
3. The UV-resistant environment-friendly PVC door seal material according to claim 1, wherein the weight ratio of the PETM to the second plasticizer is 1: 0.36 to 0.75.
4. The UV-resistant environment-friendly PVC door seal material as claimed in claim 1, wherein the filler is calcium carbonate microspheres, and the particle size range of the filler is 10-15 μm.
5. The UV-resistant environment-friendly PVC door sealing material according to any one of claims 1 to 4, further comprising at least one of a stabilizer, a lubricant and an antibacterial and antifungal agent.
6. The UV-resistant environment-friendly PVC door seal material according to claim 5, wherein the stabilizer is at least one selected from zinc stearate, calcium stearate, hydrotalcite, pentaerythritol, phosphite ester, beta-diketone and 1010 antioxidant; and/or
The lubricant is at least one selected from stearic acid, paraffin wax and PE wax; and/or
The antibacterial and mildewproof agent is selected from at least one of DCOIT, ZPT and OIT.
7. The preparation method of the UV-resistant environment-friendly PVC door seal material according to any one of claims 1 to 6, characterized by comprising the following steps:
(1) adding PVC into a high-speed mixing pot for stirring, slowly adding a plasticizer which is heated to 45-50 ℃ into the high-speed mixing pot, completely adding the plasticizer when the temperature of the high-speed mixing pot is raised to 95-100 ℃, adding a filling agent when the temperature of the high-speed mixing pot is raised to 105-110 ℃, and discharging when the temperature of the mixing pot is raised to 115-125 ℃ to obtain mixed powder;
(2) and conveying the mixed powder into a double-screw extruder or an internal mixer for mixing, conveying the mixed material into a single-screw molding extruder for extrusion molding, and finally carrying out hot cutting to obtain the UV-resistant environment-friendly PVC door seal material.
8. The method according to claim 7, wherein in the step (2), the mixing temperature is 95 to 140 ℃;
the temperature of the extrusion molding is 100-140 ℃.
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