CN114058132A - A kind of PVC toughening agent and preparation method thereof - Google Patents
A kind of PVC toughening agent and preparation method thereof Download PDFInfo
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- 239000012745 toughening agent Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 38
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 25
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 25
- 239000007822 coupling agent Substances 0.000 claims abstract description 25
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 19
- 239000004709 Chlorinated polyethylene Substances 0.000 claims abstract description 19
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 19
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 19
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 19
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000012188 paraffin wax Substances 0.000 claims abstract description 13
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 78
- 239000000203 mixture Substances 0.000 claims description 40
- 238000001816 cooling Methods 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 18
- 238000000227 grinding Methods 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000005303 weighing Methods 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- -1 sodium alkyl benzene Chemical class 0.000 claims description 7
- 229920000178 Acrylic resin Polymers 0.000 claims description 6
- 229920002125 Sokalan® Polymers 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 229940077388 benzenesulfonate Drugs 0.000 claims description 6
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 claims description 6
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 6
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 239000004584 polyacrylic acid Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000002131 composite material Substances 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 40
- 229920000915 polyvinyl chloride Polymers 0.000 description 39
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/26—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment
- C08L23/28—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment by reaction with halogens or halogen-containing compounds
- C08L23/286—Chlorinated polyethene
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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
-
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—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 an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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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
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
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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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Abstract
本发明公开了一种PVC增韧剂，按照重量份包括以下组分：包括氯化聚乙烯30‑50份、聚丙烯酸树脂15‑20份、纳米级碳酸钙8‑10份、ACR抗冲击剂6‑8份、乳化剂4‑6份、聚乙烯醇3‑4份、丙烯酸甲酯2‑5份、石蜡1‑2份、抗氧剂2‑3份、交联剂3‑5份、偶联剂3‑5份。本发明的有益效果是：本发明提供的制备方法工艺步骤简单，成本低，易于操作实现，采用本发明提供方案中制备方法生产出的PVC增韧剂用于PVC复合材料，在增韧PVC复合材料同时，还能够提高PVC复合材料的强度、刚性和模量，使得维卡软化点下降幅度极小或几乎不降低，PVC复合材料的强度与韧性达到更好的平衡，使得PVC复合材料在获得很好冲击韧性的同时，又具有很高的强度。
The invention discloses a PVC toughening agent, which comprises the following components according to parts by weight: 30-50 parts of chlorinated polyethylene, 15-20 parts of polyacrylic resin, 8-10 parts of nanoscale calcium carbonate, and ACR impact resistance agent 6-8 parts, 4-6 parts of emulsifier, 3-4 parts of polyvinyl alcohol, 2-5 parts of methyl acrylate, 1-2 parts of paraffin, 2-3 parts of antioxidant, 3-5 parts of cross-linking agent, 3-5 copies of coupling agent. The beneficial effects of the present invention are as follows: the preparation method provided by the present invention has simple process steps, low cost, and is easy to operate and realize, and the PVC toughening agent produced by the preparation method in the solution provided by the present invention is used for PVC composite materials. At the same time, it can also improve the strength, rigidity and modulus of PVC composite materials, so that the decrease of Vicat softening point is very small or almost not reduced, and the strength and toughness of PVC composite materials can achieve a better balance, so that PVC composite materials can be obtained in the It has good impact toughness and high strength at the same time.
Description
Technical Field
The invention relates to the technical field of PVC toughening agents, in particular to a PVC toughening agent and a preparation method thereof.
Background
Polyvinyl chloride (pvc), abbreviated as pvc in english, is an initiator of Vinyl Chloride Monomer (VCM) in peroxide, azo compound, etc.; or a polymer polymerized by a free radical polymerization mechanism under the action of light and heat. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. The traditional PVC product has poor toughness, and is easy to break, so that the application range of PVC is greatly limited.
In order to overcome the insufficient toughness of PVC products, it is a common practice to add a toughening agent to PVC resin to improve the toughness of PVC. The traditional toughening agent for processing the polyvinyl chloride film has the advantages that the produced polyvinyl chloride film has high brittleness, poor toughness and strength and high production cost, cannot meet the market demand, limits the application and popularization of the polyvinyl chloride film and needs to be further developed and improved.
Disclosure of Invention
The invention aims to provide a PVC toughening agent and a preparation method thereof in order to solve the problems of large brittleness, poor toughness and strength and higher production cost of the traditional toughening agent for processing a polyvinyl chloride film.
The invention realizes the purpose through the following technical scheme: the PVC toughening agent comprises the following components in parts by weight: the acrylic resin modified acrylic resin comprises 30-50 parts of chlorinated polyethylene, 15-20 parts of polyacrylic resin, 8-10 parts of nano calcium carbonate, 6-8 parts of ACR impact resistant agent, 4-6 parts of emulsifier, 3-4 parts of polyvinyl alcohol, 2-5 parts of methyl acrylate, 1-2 parts of paraffin, 2-3 parts of antioxidant, 3-5 parts of cross-linking agent and 3-5 parts of coupling agent.
Further, the emulsifier is sodium alkyl benzene sulfonate.
Further, the antioxidant is antioxidant BHT.
Further, the cross-linking agent is any one of allyl phthalate, vinyltriethoxysilane or vinyltrimethoxysilane.
Further, the coupling agent is a titanate coupling agent.
A preparation method of a PVC toughening agent comprises the following steps:
step S01: crushing for later use, namely weighing 30-50 parts by weight of chlorinated polyethylene, 15-20 parts by weight of polyacrylic resin and 8-10 parts by weight of nano calcium carbonate, feeding the materials into a crusher, and crushing the materials into particles with the diameter of 0.2-0.5 mm;
step S02: primary mixing and stirring, namely feeding the granular chlorinated polyethylene, the polyacrylic acid resin and the nano calcium carbonate prepared in the step S01 into a stirring tank for mixing, heating and stirring, wherein the stirring speed is 200-;
step S03: cooling, namely cooling the mixture prepared in the step S02 to a normal temperature state;
step S04: performing secondary mixing and stirring, namely continuously feeding the mixture prepared in the step S03 into a stirring tank for heating and stirring, wherein the stirring speed is 180-200 r/min, the heating temperature is 180-200 ℃, then weighing 6-8 parts of ACR impact resistance agent, 4-6 parts of emulsifier, 3-4 parts of polyvinyl alcohol, 2-5 parts of methyl acrylate, 1-2 parts of paraffin, 2-3 parts of antioxidant, 3-5 parts of cross-linking agent and 3-5 parts of coupling agent according to parts by weight, sequentially feeding into the stirring tank, adjusting the stirring speed to 60-120r/min during feeding, stirring while feeding, and adjusting the stirring speed to 300-400r/min after feeding is completed until the mixture is fully and uniformly mixed;
step S05: extrusion molding, namely feeding the mixture prepared in the step S04 into a granulator, and performing extrusion granulation through the granulator to form granules with the diameter of 2-3 mm;
step S06: and (4) grinding, namely grinding the particles prepared in the step S05 by using a grinding machine so that the particle size of the powder is 500-600 meshes to obtain the PVC toughening agent.
Further, the stirring time in the step S02 is 20-30 min.
Further, the mixture in the step S03 is cooled by being placed in a refrigerator.
Further, the mixture in the step S03 is cooled by natural cooling.
Compared with the prior art, the invention has the beneficial effects that: the preparation method provided by the invention has simple process steps, low cost and easy operation and realization, and the PVC toughening agent produced by the preparation method provided by the invention is used for the PVC composite material, and can improve the strength, rigidity and modulus of the PVC composite material while toughening the PVC composite material, so that the reduction range of the Vicat softening point is extremely small or hardly reduced, the strength and toughness of the PVC composite material are well balanced, and the PVC composite material has high strength while obtaining good impact toughness.
Drawings
FIG. 1 is a flow chart of the production process of the PVC toughening agent of the present invention;
FIG. 2 is a table comparing the performance of PVC articles produced using the PVC toughener of the present invention with prior art tougheners;
FIG. 3 is a table comparing physical and mechanical properties of PVC articles produced using the PVC toughener of the present invention and prior art tougheners.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The PVC toughening agent shown in the figures 1 to 3 comprises the following components in parts by weight: the acrylic resin modified acrylic resin comprises 30-50 parts of chlorinated polyethylene, 15-20 parts of polyacrylic resin, 8-10 parts of nano calcium carbonate, 6-8 parts of ACR impact resistant agent, 4-6 parts of emulsifier, 3-4 parts of polyvinyl alcohol, 2-5 parts of methyl acrylate, 1-2 parts of paraffin, 2-3 parts of antioxidant, 3-5 parts of cross-linking agent and 3-5 parts of coupling agent.
The emulsifier is sodium alkyl benzene sulfonate. The antioxidant is antioxidant BHT. The cross-linking agent is any one of allyl phthalate, vinyl triethoxysilane or vinyl trimethoxysilane. The coupling agent is titanate coupling agent.
A preparation method of a PVC toughening agent comprises the following steps:
step S01: crushing for later use, namely weighing 30-50 parts by weight of chlorinated polyethylene, 15-20 parts by weight of polyacrylic resin and 8-10 parts by weight of nano calcium carbonate, feeding the materials into a crusher, and crushing the materials into particles with the diameter of 0.2-0.5 mm;
step S02: primary mixing and stirring, namely feeding the granular chlorinated polyethylene, the polyacrylic acid resin and the nano calcium carbonate prepared in the step S01 into a stirring tank for mixing, heating and stirring, wherein the stirring speed is 200-;
step S03: cooling, namely cooling the mixture prepared in the step S02 to a normal temperature state;
step S04: performing secondary mixing and stirring, namely continuously feeding the mixture prepared in the step S03 into a stirring tank for heating and stirring, wherein the stirring speed is 180-200 r/min, the heating temperature is 180-200 ℃, then weighing 6-8 parts of ACR impact resistance agent, 4-6 parts of emulsifier, 3-4 parts of polyvinyl alcohol, 2-5 parts of methyl acrylate, 1-2 parts of paraffin, 2-3 parts of antioxidant, 3-5 parts of cross-linking agent and 3-5 parts of coupling agent according to parts by weight, sequentially feeding into the stirring tank, adjusting the stirring speed to 60-120r/min during feeding, stirring while feeding, and adjusting the stirring speed to 300-400r/min after feeding is completed until the mixture is fully and uniformly mixed;
step S05: extrusion molding, namely feeding the mixture prepared in the step S04 into a granulator, and performing extrusion granulation through the granulator to form granules with the diameter of 2-3 mm;
step S06: and (4) grinding, namely grinding the particles prepared in the step S05 by using a grinding machine so that the particle size of the powder is 500-600 meshes to obtain the PVC toughening agent.
And the stirring time in the step S02 is 20-30 min. And cooling the mixture in the step S03 by putting the mixture into a refrigerator for cooling. And cooling the mixture in the step S03 in a natural cooling mode.
The present invention is illustrated by the following more specific examples.
The first embodiment is as follows:
the PVC toughening agent comprises the following components in parts by weight: the paint comprises 16 parts of chlorinated polyethylene, 30 parts of polyacrylic resin, 8 parts of nano calcium carbonate, 6 parts of ACR impact resistance agent, 4 parts of emulsifier, 3 parts of polyvinyl alcohol, 2 parts of methyl acrylate, 1 part of paraffin, 2 parts of antioxidant, 3 parts of crosslinking agent and 3 parts of coupling agent.
The emulsifier is sodium alkyl benzene sulfonate. The antioxidant is antioxidant BHT. The cross-linking agent is any one of allyl phthalate, vinyl triethoxysilane or vinyl trimethoxysilane. The coupling agent is titanate coupling agent.
A preparation method of a PVC toughening agent comprises the following steps:
step S01: crushing for later use, namely weighing 30 parts by weight of chlorinated polyethylene, 15 parts by weight of polyacrylic resin and 8 parts by weight of nano calcium carbonate, feeding the materials into a crusher, and crushing the materials into particles with the diameter of 0.2 mm;
step S02: primary mixing and stirring, namely feeding the granular chlorinated polyethylene, the polyacrylic acid resin and the nano calcium carbonate prepared in the step S01 into a stirring tank for mixing, heating and stirring, wherein the stirring speed is 200r/min, and the heating temperature is 200 ℃;
step S03: cooling, namely cooling the mixture prepared in the step S02 to a normal temperature state;
step S04: mixing and stirring for the second time, continuously feeding the mixture prepared in the step S03 into a stirring tank for heating and stirring, wherein the stirring speed is 180r/min, the heating temperature is 180 ℃, then weighing 6 parts of ACR impact resistance agent, 4 parts of emulsifier, 3 parts of polyvinyl alcohol, 2 parts of methyl acrylate, 1 part of paraffin, 2 parts of antioxidant, 3 parts of cross-linking agent and 3 parts of coupling agent according to the parts by weight, sequentially feeding into the stirring tank, adjusting the stirring speed to 60r/min during feeding, feeding while stirring, and adjusting the stirring speed to 300r/min after feeding is finished until the mixture is fully and uniformly mixed;
step S05: extrusion molding, namely feeding the mixture prepared in the step S04 into a granulator, and performing extrusion granulation through the granulator to form granules with the diameter of 2 mm;
step S06: and (5) grinding, namely grinding the particles prepared in the step S05 by using a grinding mill to make the particle size of the powder be 500 meshes, thus obtaining the PVC toughening agent.
The stirring time in the step S02 is 20 min. And cooling the mixture in the step S03 by putting the mixture into a refrigerator for cooling. And cooling the mixture in the step S03 in a natural cooling mode.
Example two:
the PVC toughening agent comprises the following components in parts by weight: the paint comprises 40 parts of chlorinated polyethylene, 18 parts of polyacrylic resin, 9 parts of nano calcium carbonate, 7 parts of ACR (acrylic acrylate) impact resistant agent, 5 parts of emulsifier, 3 parts of polyvinyl alcohol, 3 parts of methyl acrylate, 1 part of paraffin, 2 parts of antioxidant, 4 parts of crosslinking agent and 4 parts of coupling agent.
The emulsifier is sodium alkyl benzene sulfonate. The antioxidant is antioxidant BHT. The cross-linking agent is any one of allyl phthalate, vinyl triethoxysilane or vinyl trimethoxysilane. The coupling agent is titanate coupling agent.
A preparation method of a PVC toughening agent comprises the following steps:
step S01: crushing for later use, namely weighing 40 parts by weight of chlorinated polyethylene, 18 parts by weight of polyacrylic resin and 9 parts by weight of nano calcium carbonate, feeding the materials into a crusher, and crushing the materials into particles with the diameter of 0.3 mm;
step S02: primary mixing and stirring, namely feeding the granular chlorinated polyethylene, the polyacrylic acid resin and the nano calcium carbonate prepared in the step S01 into a stirring tank for mixing, heating and stirring, wherein the stirring speed is 300r/min, and the heating temperature is 210 ℃;
step S03: cooling, namely cooling the mixture prepared in the step S02 to a normal temperature state;
step S04: mixing and stirring for the second time, continuously feeding the mixture prepared in the step S03 into a stirring tank for heating and stirring, wherein the stirring speed is 250r/min, the heating temperature is 190 ℃, then weighing 7 parts of ACR impact resistance agent, 5 parts of emulsifier, 3 parts of polyvinyl alcohol, 3 parts of methyl acrylate, 1 part of paraffin, 2 parts of antioxidant, 4 parts of cross-linking agent and 4 parts of coupling agent according to the parts by weight, sequentially feeding into the stirring tank, adjusting the stirring speed to 90r/min during feeding, feeding while stirring, and adjusting the stirring speed to 350r/min after feeding is finished until the mixture is fully and uniformly mixed;
step S05: extrusion molding, namely feeding the mixture prepared in the step S04 into a granulator, and carrying out extrusion granulation through the granulator to form granules with the diameter of 2.5 mm;
step S06: and (4) grinding, namely grinding the particles prepared in the step S05 by using a grinder to make the particle size of the powder be 550 meshes to obtain the PVC toughening agent.
The stirring time in the step S02 is 25 min. And cooling the mixture in the step S03 by putting the mixture into a refrigerator for cooling. And cooling the mixture in the step S03 in a natural cooling mode.
Example three:
the PVC toughening agent comprises the following components in parts by weight: the paint comprises 50 parts of chlorinated polyethylene, 20 parts of polyacrylic resin, 10 parts of nano calcium carbonate, 8 parts of ACR (acrylic acrylate) impact resistant agent, 6 parts of emulsifier, 4 parts of polyvinyl alcohol, 5 parts of methyl acrylate, 2 parts of paraffin, 3 parts of antioxidant, 5 parts of crosslinking agent and 5 parts of coupling agent.
The emulsifier is sodium alkyl benzene sulfonate. The antioxidant is antioxidant BHT. The cross-linking agent is any one of allyl phthalate, vinyl triethoxysilane or vinyl trimethoxysilane. The coupling agent is titanate coupling agent.
A preparation method of a PVC toughening agent comprises the following steps:
step S01: crushing for later use, namely weighing 50 parts by weight of chlorinated polyethylene, 20 parts by weight of polyacrylic resin and 10 parts by weight of nano calcium carbonate, feeding the materials into a crusher, and crushing the materials into particles with the diameter of 0.5 mm;
step S02: primary mixing and stirring, namely feeding the granular chlorinated polyethylene, the polyacrylic acid resin and the nano calcium carbonate prepared in the step S01 into a stirring tank for mixing, heating and stirring, wherein the stirring speed is 400r/min, and the heating temperature is 220 ℃;
step S03: cooling, namely cooling the mixture prepared in the step S02 to a normal temperature state;
step S04: mixing and stirring for the second time, continuously feeding the mixture prepared in the step S03 into a stirring tank for heating and stirring, wherein the stirring speed is 300r/min, the heating temperature is 200 ℃, then weighing 8 parts of ACR impact resistance agent, 6 parts of emulsifier, 4 parts of polyvinyl alcohol, 5 parts of methyl acrylate, 2 parts of paraffin, 3 parts of antioxidant, 5 parts of cross-linking agent and 5 parts of coupling agent according to the parts by weight, sequentially feeding into the stirring tank, adjusting the stirring speed to 120r/min during feeding, feeding while stirring, and adjusting the stirring speed to 400r/min after feeding is finished until the mixture is fully and uniformly mixed;
step S05: extrusion molding, namely feeding the mixture prepared in the step S04 into a granulator, and performing extrusion granulation through the granulator to form granules with the diameter of 3 mm;
step S06: and (5) grinding, namely grinding the particles prepared in the step S05 by using a grinder to make the particle size of the powder be 600 meshes to obtain the PVC toughening agent.
And the stirring time in the step S02 is 20-30 min. And cooling the mixture in the step S03 by putting the mixture into a refrigerator for cooling. And cooling the mixture in the step S03 in a natural cooling mode.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The PVC toughening agent is characterized by comprising the following components in parts by weight: the acrylic resin modified acrylic resin comprises 30-50 parts of chlorinated polyethylene, 15-20 parts of polyacrylic resin, 8-10 parts of nano calcium carbonate, 6-8 parts of ACR impact resistant agent, 4-6 parts of emulsifier, 3-4 parts of polyvinyl alcohol, 2-5 parts of methyl acrylate, 1-2 parts of paraffin, 2-3 parts of antioxidant, 3-5 parts of cross-linking agent and 3-5 parts of coupling agent.
2. The PVC toughening agent according to claim 1, wherein the emulsifier is sodium alkyl benzene sulfonate.
3. The PVC toughening agent according to claim 1, wherein the antioxidant is antioxidant BHT.
4. The PVC toughening agent according to claim 1, wherein the crosslinking agent is any one of allyl phthalate, vinyltriethoxysilane or vinyltrimethoxysilane.
5. The PVC toughening agent of claim 1, wherein the coupling agent is a titanate coupling agent.
6. The preparation method of the PVC toughening agent is characterized by comprising the following steps:
step S01: crushing for later use, namely weighing 30-50 parts by weight of chlorinated polyethylene, 15-20 parts by weight of polyacrylic resin and 8-10 parts by weight of nano calcium carbonate, feeding the materials into a crusher, and crushing the materials into particles with the diameter of 0.2-0.5 mm;
step S02: primary mixing and stirring, namely feeding the granular chlorinated polyethylene, the polyacrylic acid resin and the nano calcium carbonate prepared in the step S01 into a stirring tank for mixing, heating and stirring, wherein the stirring speed is 200-;
step S03: cooling, namely cooling the mixture prepared in the step S02 to a normal temperature state;
step S04: performing secondary mixing and stirring, namely continuously feeding the mixture prepared in the step S03 into a stirring tank for heating and stirring, wherein the stirring speed is 180-200 r/min, the heating temperature is 180-200 ℃, then weighing 6-8 parts of ACR impact resistance agent, 4-6 parts of emulsifier, 3-4 parts of polyvinyl alcohol, 2-5 parts of methyl acrylate, 1-2 parts of paraffin, 2-3 parts of antioxidant, 3-5 parts of cross-linking agent and 3-5 parts of coupling agent according to parts by weight, sequentially feeding into the stirring tank, adjusting the stirring speed to 60-120r/min during feeding, stirring while feeding, and adjusting the stirring speed to 300-400r/min after feeding is completed until the mixture is fully and uniformly mixed;
step S05: extrusion molding, namely feeding the mixture prepared in the step S04 into a granulator, and performing extrusion granulation through the granulator to form granules with the diameter of 2-3 mm;
step S06: and (4) grinding, namely grinding the particles prepared in the step S05 by using a grinding machine so that the particle size of the powder is 500-600 meshes to obtain the PVC toughening agent.
7. The method for preparing the PVC toughening agent according to claim 6, wherein the stirring time in the step S02 is 20-30 min.
8. The method for preparing the PVC toughening agent according to claim 6, wherein the mixture in the step S03 is cooled and cooled by being put into a refrigerator.
9. The method for preparing the PVC toughening agent according to claim 6, wherein the mixture in the step S03 is cooled by natural cooling.
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| CN113429706A (en) * | 2021-07-21 | 2021-09-24 | 大维塑料技术(南京)有限公司 | Formula of PVC-M impact-resistant pipe |
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