CN113354908A - Environment-friendly matte medical PVC (polyvinyl chloride) aggregate and preparation method thereof - Google Patents
Environment-friendly matte medical PVC (polyvinyl chloride) aggregate and preparation method thereof Download PDFInfo
- Publication number
- CN113354908A CN113354908A CN202110632367.5A CN202110632367A CN113354908A CN 113354908 A CN113354908 A CN 113354908A CN 202110632367 A CN202110632367 A CN 202110632367A CN 113354908 A CN113354908 A CN 113354908A
- Authority
- CN
- China
- Prior art keywords
- pvc
- environment
- parts
- plasticizer
- medical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention relates to the technical field of medical PVC granules, and discloses an environment-friendly matte medical PVC granule and a preparation method thereof, wherein the preparation method comprises the following steps of S1, weighing PVC cross-linked resin and other auxiliary additives; s2, adding the mixture into a high-speed mixer for mixing and stirring; s3, adding fumed nano silicon dioxide into the hot mixed powder; s4, stirring the hot mixed powder at a constant speed, and then sending the powder into a cold mixer for cooling; s5, cooling the mixture, and adding the cooled mixed powder into an extruder for granulation; s6, adjusting the barrel temperature to 150 ℃ and the die head temperature to 155 ℃, and pelletizing; and S7, cutting into granules, cooling, and finally packaging and warehousing. The environment-friendly matte medical PVC granular material and the preparation method thereof have the advantages of reasonable formula and advanced production process, can meet the matte requirement of the appearance of medical instruments, and has high environment-friendly performance.
Description
Technical Field
The invention relates to the technical field of medical PVC granules, in particular to an environment-friendly matte medical PVC granule and a preparation method thereof.
Background
The medical PVC granular material is one of the main raw materials widely applied to disposable medical instruments at home and abroad at present. Because of the characteristics of safety, low price, excellent comprehensive performance and the like, besides the application fields of traditional infusion sets, infusion bags and the like, various other applications are popularized more and more, for example: various oxygen masks, anaesthetic masks, tracheal cannulas, analgesic pumps and the like.
The prior art has the following defects and shortcomings:
along with the increasing awareness of people on environmental protection, higher requirements are put forward on the environmental protection performance of medical PVC granules, and meanwhile, the existing medical PVC granules do not have the matte effect and can cause the phenomena of glare and glaring on the surface of a medical instrument, so that the clinical application of the appearance of the medical instrument is influenced, and the requirements of high-quality medical instruments cannot be met.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an environment-friendly matte medical PVC granular material and a preparation method thereof, which can solve the problems that the prior medical PVC granular material does not have a matte effect, and the surface of a medical instrument can generate phenomena of glare and dazzling, so that the clinical application of the appearance of the medical instrument is influenced, the requirements of high-quality medical instruments cannot be met, the formula is unreasonable, the production process is not advanced enough, and the product performance needs to be improved; the invention effectively solves the problems by arranging the environment-friendly matte medical PVC granular material and the preparation method thereof.
In order to achieve the purpose of the environment-friendly matte medical PVC granular material and the preparation method thereof, the invention provides the following technical scheme: an environment-friendly matte medical PVC granular material comprises 100 parts of PVC cross-linked resin, 40 parts of a plasticizer, 5-10 parts of silicon dioxide, 1-3 parts of a composite heat stabilizer, 3-6 parts of an auxiliary stabilizer, 0.1-0.7 part of a lubricant and 2 parts of a chelating agent.
Preferably, the PVC cross-linked resin is loose PVC resin, and the residual vinyl chloride monomer in the resin is completely removed after the processes of hot mixing, cold stirring and vacuumizing.
Preferably, the silica is fumed nanosilica.
Preferably, the plasticizer comprises a primary plasticizer and a secondary plasticizer, wherein the primary plasticizer is dioctyl phthalate, and the secondary plasticizer is an epoxy compound.
Preferably, the composite heat stabilizer comprises organic acid calcium salt, organic acid zinc salt and organic acid lead salt, wherein the organic acid calcium salt, the organic acid zinc salt and the organic acid lead salt are mixed in a ratio of 1.5:1.8: 1.6.
Preferably, the auxiliary stabilizer is epoxidized soybean oil.
Preferably, the chelating agent is a phosphite compound.
Further, the preparation method of the environment-friendly matte medical PVC granular material specifically comprises the following steps,
the method comprises the following steps of firstly, carrying out quality inspection on PVC cross-linked resin and other auxiliary additives, and after the PVC cross-linked resin and the other auxiliary additives are qualified, carrying out vibration screening and carrying out mass weighing, wherein 100 parts of the PVC cross-linked resin, 40 parts of a plasticizer, 5-10 parts of silicon dioxide, 1-3 parts of a composite heat stabilizer, 3-6 parts of an auxiliary stabilizer, 0.1-0.7 part of a lubricant and 2 parts of a chelating agent are included;
step two, respectively adding the plasticizer, the composite heat stabilizer, the auxiliary stabilizer, the chelating agent, the lubricant and the PVC cross-linked resin into a high-speed mixer for mixing and stirring to obtain loose hot mixed powder, wherein the stirring speed is 1500 revolutions per minute;
step three, heating and stirring the hot mixed powder to 50-55 ℃, and adding gas-phase nano silicon dioxide into the hot mixed powder;
step four, stirring the hot mixed powder at a constant speed to 55-65 ℃, then sending the hot mixed powder into a cold mixer for cooling, and stirring the mixture at a stirring speed of 200 revolutions per minute;
step five, cooling the mixture to 25-30 ℃, adding the cooled mixed powder into an extruder for granulation, and keeping a certain vacuum degree of an extruder barrel to facilitate the extraction of vinyl chloride monomers and other volatile matters;
step six, adjusting the temperature of a cylinder to be 150 ℃ and the temperature of a die head to be 155 ℃, and carrying out grain cutting;
and step seven, granulating, cooling, and finally packaging and warehousing.
Compared with the prior art, the invention provides the environment-friendly matte medical PVC granular material and the preparation method thereof, and the environment-friendly matte medical PVC granular material has the following beneficial effects:
according to the environment-friendly matte medical PVC granular material and the preparation method thereof, the loose PVC cross-linked resin with stable performance is adopted, so that various additives can be effectively absorbed, the cost is low, the extinction effect is good, and the extinction effect of the product can be improved; the composite heat stabilizer is added, the composite heat stabilizer comprises organic acid calcium salt, organic acid zinc salt and organic acid lead salt, the composite heat stabilizer has excellent heat stability, the auxiliary stabilizer is added to slow down the reaction, keep chemical balance, reduce surface tension, prevent light, thermal decomposition or oxidative decomposition and the like, so that the stability of the PVC cross-linked resin is improved, the PVC cross-linked resin can be prevented from being decomposed in the dissolving process, the lubricant can reduce the intermolecular cohesion of PVC granules, the vitrification temperature of the PVC cross-linked resin is higher, the PVC cross-linked resin becomes hard and brittle after being slightly reduced, the plasticizer comprises a main plasticizer and an auxiliary plasticizer through adding the plasticizer, the main plasticizer is dioctyl phthalate, the auxiliary plasticizer is an epoxy compound, the vitrification temperature of the PVC cross-linked resin can be reduced, the plasticity and the elasticity are increased, and the PVC cross-linked resin, the plasticizer, the composite heat stabilizer, The chelating agent is added in the thermal mixing process of the auxiliary stabilizer, the lubricant and the chelating agent, the chelating agent is a phosphite compound, metal ions such as iron, calcium, magnesium and the like in water can be chelated, the effect of the stabilizer is improved, and meanwhile, the gas-phase nano silicon dioxide is added, so that the extinction effect is good, the environment is high, and the preparation method of the environment-friendly matte medical PVC granular material can produce a medical PVC granular material formula which can meet the matte requirement of the appearance of medical instruments, is reasonable in formula and excellent in performance, and can meet the medical requirement of the medical PVC granular material.
Drawings
FIG. 1 is a schematic view of the process of the present invention.
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.
Referring to fig. 1, an environment-friendly matte medical PVC pellet includes 100 parts of PVC crosslinked resin, 40 parts of plasticizer, 5-10 parts of silicon dioxide, 1-3 parts of composite heat stabilizer, 3-6 parts of auxiliary stabilizer, 0.1-0.7 part of lubricant, and 2 parts of chelating agent.
In conclusion, the PVC cross-linked resin adopts loose PVC resin, the residual vinyl chloride monomer in the resin is completely removed after the processes of hot mixing, cold stirring and vacuumizing, the loose PVC cross-linked resin with stable performance is adopted, various additives can be effectively absorbed, the cost is low, the extinction effect is good, the extinction effect of the product can be improved, and the residual vinyl chloride monomer in the resin can be completely removed after the processes of hot mixing, cold stirring and vacuumizing, so that the medical requirement is met; the silicon dioxide is gas phase nano silicon dioxide, so that the extinction effect is good, and the environment is high; the plasticizer comprises a primary plasticizer and a secondary plasticizer, wherein the primary plasticizer is dioctyl phthalate, and the secondary plasticizer is an epoxy compound, so that the glass transition temperature of the PVC cross-linked resin is reduced, and the plasticity and the elasticity are improved; the composite heat stabilizer comprises organic acid calcium salt, organic acid zinc salt and organic acid lead salt, wherein the organic acid calcium salt, the organic acid zinc salt and the organic acid lead salt are mixed according to the proportion of 1.5:1.8:1.6, and the composite heat stabilizer has excellent heat stability; the auxiliary stabilizer is epoxidized soybean oil, so that the reaction can be slowed down and the chemical balance is kept; the chelating agent is a phosphite compound, can chelate metal ions such as iron, calcium, magnesium and the like in water, and improves the effect of the stabilizer.
The working use flow and the installation method of the invention are that when the environment-friendly matte medical PVC granular material and the preparation method thereof are used, the preparation method specifically comprises the following steps of S1, carrying out quality inspection on PVC cross-linked resin and other auxiliary additives, and after the inspection is qualified, carrying out vibration screening and carrying out mass weighing, wherein 100 parts of PVC cross-linked resin, 40 parts of plasticizer, 5-10 parts of silicon dioxide, 1-3 parts of composite heat stabilizer, 3-6 parts of auxiliary stabilizer, 0.1-0.7 part of lubricant and 2 parts of chelating agent are used; s2, respectively adding the plasticizer, the composite heat stabilizer, the auxiliary stabilizer, the chelating agent, the lubricant and the PVC cross-linked resin into a high-speed mixer for mixing and stirring to obtain loose hot mixed powder, wherein the stirring speed is 1500 rpm; s3, heating and stirring the hot mixed powder to 50-55 ℃, and adding gas-phase nano silicon dioxide into the hot mixed powder; s4, stirring the hot mixed powder at a constant speed to 55-65 ℃, then sending the hot mixed powder into a cold mixer for cooling, and stirring the mixture at a stirring speed of 200 r/m; s5, cooling the mixture to 25-30 ℃, adding the cooled mixed powder into an extruder for granulation, and keeping a certain vacuum degree of an extruder barrel to facilitate the extraction of vinyl chloride monomer and other volatile matters; s6, adjusting the barrel temperature to 150 ℃ and the die head temperature to 155 ℃, and pelletizing; and S7, cutting into granules, cooling, and finally packaging and warehousing.
According to the environment-friendly matte medical PVC granular material and the preparation method thereof, the loose PVC cross-linked resin with stable performance is adopted, so that various additives can be effectively absorbed, the cost is low, the extinction effect is good, and the extinction effect of the product can be improved; the composite heat stabilizer is added, the composite heat stabilizer comprises organic acid calcium salt, organic acid zinc salt and organic acid lead salt, the composite heat stabilizer has excellent heat stability, the auxiliary stabilizer is added to slow down the reaction, keep chemical balance, reduce surface tension, prevent light, thermal decomposition or oxidative decomposition and the like, so that the stability of the PVC cross-linked resin is improved, the PVC cross-linked resin can be prevented from being decomposed in the dissolving process, the lubricant can reduce the intermolecular cohesion of PVC granules, the vitrification temperature of the PVC cross-linked resin is higher, the PVC cross-linked resin becomes hard and brittle after being slightly reduced, the plasticizer comprises a main plasticizer and an auxiliary plasticizer through adding the plasticizer, the main plasticizer is dioctyl phthalate, the auxiliary plasticizer is an epoxy compound, the vitrification temperature of the PVC cross-linked resin can be reduced, the plasticity and the elasticity are increased, and the PVC cross-linked resin, the plasticizer, the composite heat stabilizer, The chelating agent is added in the thermal mixing process of the auxiliary stabilizer, the lubricant and the chelating agent, the chelating agent is a phosphite compound, metal ions such as iron, calcium, magnesium and the like in water can be chelated, the effect of the stabilizer is improved, and meanwhile, the gas-phase nano silicon dioxide is added, so that the extinction effect is good, the environment is high, and the preparation method of the environment-friendly matte medical PVC granular material can produce a medical PVC granular material formula which can meet the matte requirement of the appearance of medical instruments, is reasonable in formula and excellent in performance, and can meet the medical requirement of the medical PVC granular material.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a medical PVC aggregate of mute light of environmental protection which characterized in that: the PVC heat stabilizer comprises 100 parts of PVC cross-linked resin, 40 parts of plasticizer, 5-10 parts of silicon dioxide, 1-3 parts of composite heat stabilizer, 3-6 parts of auxiliary stabilizer, 0.1-0.7 part of lubricant and 2 parts of chelating agent.
2. The environment-friendly matte medical PVC granular material according to claim 1, which is characterized in that: the PVC cross-linked resin is loose PVC resin, and the residual vinyl chloride monomer in the resin is completely removed after the processes of hot mixing, cold stirring and vacuum pumping.
3. The environment-friendly matte medical PVC granular material according to claim 1, which is characterized in that: the silicon dioxide is gas phase nano silicon dioxide.
4. The environment-friendly matte medical PVC granular material according to claim 1, which is characterized in that: the plasticizer comprises a primary plasticizer and a secondary plasticizer, wherein the primary plasticizer is dioctyl phthalate, and the secondary plasticizer is an epoxy compound.
5. The environment-friendly matte medical PVC granular material according to claim 1, which is characterized in that: the composite heat stabilizer comprises organic acid calcium salt, organic acid zinc salt and organic acid lead salt, wherein the organic acid calcium salt, the organic acid zinc salt and the organic acid lead salt are mixed according to the proportion of 1.5:1.8: 1.6.
6. The environment-friendly matte medical PVC granular material according to claim 1, which is characterized in that: the auxiliary stabilizer is epoxidized soybean oil.
7. The environment-friendly matte medical PVC granular material according to claim 1, which is characterized in that: the chelating agent is selected from phosphite compounds.
8. A preparation method of environment-friendly matte medical PVC granules is characterized by comprising the following steps: the environment-friendly matte medical PVC granule based on the claims 1-7, the preparation method thereof specifically comprises the following steps,
the method comprises the following steps of firstly, carrying out quality inspection on PVC cross-linked resin and other auxiliary additives, and after the PVC cross-linked resin and the other auxiliary additives are qualified, carrying out vibration screening and carrying out mass weighing, wherein 100 parts of the PVC cross-linked resin, 40 parts of a plasticizer, 5-10 parts of silicon dioxide, 1-3 parts of a composite heat stabilizer, 3-6 parts of an auxiliary stabilizer, 0.1-0.7 part of a lubricant and 2 parts of a chelating agent are included;
step two, respectively adding the plasticizer, the composite heat stabilizer, the auxiliary stabilizer, the chelating agent, the lubricant and the PVC cross-linked resin into a high-speed mixer for mixing and stirring to obtain loose hot mixed powder, wherein the stirring speed is 1500 revolutions per minute;
step three, heating and stirring the hot mixed powder to 50-55 ℃, and adding gas-phase nano silicon dioxide into the hot mixed powder;
step four, stirring the hot mixed powder at a constant speed to 55-65 ℃, then sending the hot mixed powder into a cold mixer for cooling, and stirring the mixture at a stirring speed of 200 revolutions per minute;
step five, cooling the mixture to 25-30 ℃, adding the cooled mixed powder into an extruder for granulation, and keeping a certain vacuum degree of an extruder barrel to facilitate the extraction of vinyl chloride monomers and other volatile matters;
step six, adjusting the temperature of a cylinder to be 150 ℃ and the temperature of a die head to be 155 ℃, and carrying out grain cutting;
and step seven, granulating, cooling, and finally packaging and warehousing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110632367.5A CN113354908A (en) | 2021-06-07 | 2021-06-07 | Environment-friendly matte medical PVC (polyvinyl chloride) aggregate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110632367.5A CN113354908A (en) | 2021-06-07 | 2021-06-07 | Environment-friendly matte medical PVC (polyvinyl chloride) aggregate and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113354908A true CN113354908A (en) | 2021-09-07 |
Family
ID=77532774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110632367.5A Withdrawn CN113354908A (en) | 2021-06-07 | 2021-06-07 | Environment-friendly matte medical PVC (polyvinyl chloride) aggregate and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113354908A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113881169A (en) * | 2021-11-11 | 2022-01-04 | 扬州中欣高分子材料有限公司 | Medical PVC infusion bag |
| CN115819901A (en) * | 2022-12-29 | 2023-03-21 | 安徽天安新材料有限公司 | High-temperature non-grain non-shiny matte film and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020815A (en) * | 2011-01-12 | 2011-04-20 | 成都市新津事丰医疗器械有限公司 | Delustring medical soft PVC modified material with low temperature resistance and low DOP precipitation |
| CN104119625A (en) * | 2014-07-19 | 2014-10-29 | 浙江汪洋高分子材料有限公司 | Novel environment-friendly matte medical PVC aggregate and preparation method thereof |
| CN105419168A (en) * | 2015-12-31 | 2016-03-23 | 东莞市祺龙电业有限公司 | Medical environmental protection PVC modified material and preparation method therefor |
-
2021
- 2021-06-07 CN CN202110632367.5A patent/CN113354908A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020815A (en) * | 2011-01-12 | 2011-04-20 | 成都市新津事丰医疗器械有限公司 | Delustring medical soft PVC modified material with low temperature resistance and low DOP precipitation |
| CN104119625A (en) * | 2014-07-19 | 2014-10-29 | 浙江汪洋高分子材料有限公司 | Novel environment-friendly matte medical PVC aggregate and preparation method thereof |
| CN105419168A (en) * | 2015-12-31 | 2016-03-23 | 东莞市祺龙电业有限公司 | Medical environmental protection PVC modified material and preparation method therefor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113881169A (en) * | 2021-11-11 | 2022-01-04 | 扬州中欣高分子材料有限公司 | Medical PVC infusion bag |
| CN115819901A (en) * | 2022-12-29 | 2023-03-21 | 安徽天安新材料有限公司 | High-temperature non-grain non-shiny matte film and preparation method thereof |
| CN115819901B (en) * | 2022-12-29 | 2024-03-15 | 安徽天安新材料有限公司 | Matte film capable of preventing scattering lines and brightness at high temperature and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101921405B (en) | Methyltin composite heat stabilizer and preparation method thereof | |
| CN113354908A (en) | Environment-friendly matte medical PVC (polyvinyl chloride) aggregate and preparation method thereof | |
| CN103073816B (en) | Heat-resisting and cold-resisting environment-friendly PVC (polyvinyl chloride) modified material and preparation method thereof | |
| CN102321317A (en) | High-transparent medical PVC pellet and preparation method thereof | |
| CN102604295B (en) | Polymer calcium zinc complex soap heat stabilizer, preparation method thereof and application thereof | |
| CN107226967A (en) | Hidden pipe salt discharge modified PVC bellows | |
| CN104119625A (en) | Novel environment-friendly matte medical PVC aggregate and preparation method thereof | |
| CN103980636A (en) | Wood-plastic foamed composite material and preparation method thereof | |
| CN112646269B (en) | Environment-friendly high-flame-retardance battery shell and preparation method thereof | |
| CN111100409A (en) | High-temperature water-soluble PVA composition capable of being melt and cast into film, particles and preparation method thereof | |
| CN110079090A (en) | A kind of high insulation high tenacity fire resistant polyphenylene sulfide and preparation method thereof | |
| CN108250678A (en) | A kind of environment-friendly PVC section bar organic tin stabilizer | |
| CN110951196B (en) | Corrosion-resistant and high-temperature-resistant PVC-C pipe and preparation method thereof | |
| CN104448607A (en) | Highly fireproof PVC-U pipe and preparation method thereof | |
| CN102807688A (en) | Compound stabilizer for plastic bubble tube and preparation method thereof | |
| CN113604035B (en) | Flame-retardant wear-resistant plastic particle and processing technology thereof | |
| JPH01193354A (en) | Resin composition | |
| CN109851952B (en) | Environment-friendly low-smoke flame-retardant PVC material and preparation method and application thereof | |
| CN114230944A (en) | High-toughness easy-to-bend visual electrical casing and preparation method thereof | |
| CN115073499A (en) | Antibacterial rare earth compound and application thereof | |
| CN113881169A (en) | Medical PVC infusion bag | |
| CN111763366A (en) | Modified regenerated polyethylene corrugated pipe material and preparation method thereof | |
| CN112175312A (en) | Environment-friendly stabilizer applied to transparent PVC (polyvinyl chloride) hard product | |
| CN104962000A (en) | Preparation method for flame-retardant PVC-U drain pipe | |
| CN116178792B (en) | Calcium-zinc MOFs composite heat stabilizer and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210907 |