CN101665548A - PVC resin with ultra-low degree of polymerization and manufacturing method thereof - Google Patents
PVC resin with ultra-low degree of polymerization and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a PVC resin with ultra-low degree of polymerization and a manufacturing method thereof. In the invention, a polymerization method is adopted to carry out polymerization reaction, the reaction temperature is 60-64 DEG C, and the reaction pressure is less than 1.0 MPa; a first chain transfer agent is added when the polymerization reaction is carried out for 0-30min, and then0.005-0.012% of vinyl chloride monomer (VCM) is added; a second chain transfer agent is added when the polymerization reaction is carried out for 60-90min, and then 0.005-0.02% of monomer is added toobtain the PVC resin with ultra-low degree of polymerization. The PVC resin manufactured by the invention has the advantages of the average degree of polymerization below 500, high apparent density, low melting and gelatinization temperature, low melt viscosity, good transparency, short plasticization time and favorable processability and the like, and the phenomenon of accelerating products agingdue to the transfer of plasticizer does not appear in machining process.
Description
Technical field
The present invention relates to a kind of polyvinyl chloride resin and production method thereof, relate in particular to a kind of PVC resin with ultra-low degree of polymerization and production method thereof.
Background technology
As everyone knows, during no chain-transfer agent, polymerization temperature is unique factor of decision polyvinyl chloride molecular weight, polymeric reaction temperature is high more, the molecular weight of polyvinyl chloride (PVC) RESINS is low more, therefore, obtain the very low polyvinyl chloride (PVC) RESINS of mean polymerisation degree just needs very high temperature of reaction, even can reach more than 70 ℃.Raising along with temperature of reaction, internal structure to polyvinyl chloride resin particle can produce a very large impact: primary particle becomes big, the clinkering heighten degree, improved the solubleness of polyvinyl chloride (PVC) RESINS in monomer etc., and formation closely reaches the granulated glass sphere particle, this must cause the reduction of resin particle interior porosity easily, the thermal decomposition rate of polyvinyl chloride (PVC) RESINS constantly aggravates, and causes the thermostability of resin to reduce.Temperature of reaction is high more, and the corresponding raising of polymerization pressure can surpass 1.0MPa, the requirement that this is harsh more to the withstand voltage proposition of polymerization unit.Temperature of reaction is high more, also can cause sticking still serious, gives in the Production of PVC process and brings difficulty.Also have, along with the raising of temperature of reaction, polymerization also correspondingly requires to improve with the gelling temperature and the cloud point of dispersion agent, and this just causes polymerization to be very restricted with dispersion agent.
At present, produce the polyvinyl-chloride of low-polymerization degree resin and all adopt chain-transfer agent, to reduce temperature of reaction.Different chain-transfer agents is also inequality to the ability of polyvinyl chloride molecular weight influence under identical concentration, and the polyvinyl chloride particles characteristic is also had a significant impact, and this just needs to select suitable chain-transfer agent.
Adopting chain-transfer agent to produce the polyvinyl-chloride of low-polymerization degree resin also will consider under different transformation efficiencys, chain transfer agent concentration is to the influence of polyvinyl chloride molecular weight, this just needs to select suitable chain-transfer agent add-on, reinforced time and feed way, otherwise will make the polyvinyl chloride (PVC) RESINS molecular weight distribution wide, the branchign of molecule degree is big, cause the resin particle poor morphology, the problem of processing heat stability difference.
Summary of the invention
The objective of the invention is to overcome the problems referred to above of polyvinyl chloride resin of the prior art and production method existence thereof, a kind of PVC resin with ultra-low degree of polymerization and production method thereof are provided.The polyvinyl chloride resin mean polymerisation degree that the present invention produces reaches below 500, have characteristics such as apparent density height, fusion and gelling temperature are low, melting viscosity is low, the transparency is good, fusion time is short, processing characteristics is good, in the course of processing, can not produce owing to goods aged phenomenon is quickened in plasticizer migration.
The technical solution used in the present invention is as follows:
A kind of PVC resin with ultra-low degree of polymerization is characterized in that, comprises the component of following parts by weight:
100 parts of VCM vinyl chloride monomers,
150～200 parts of pure water,
0.4～0.7 part of dispersion agent,
0.02～0.04 part of buffer reagent,
0.04～0.09 part of initiator,
0.01～0.032 part of chain-transfer agent,
0.3～0.6 part of thermo-stabilizer,
0.3～0.6 part of terminator.
Described dispersion agent is a kind of among polyvinyl alcohol GH20, the polyvinyl alcohol KH20 of Japanese synthetic chemistry company and the polyvinyl alcohol KH17, and a kind of among the Vltra tears E50 of Dow Chemical company and the Vltra tears F50, a kind of compound with among the polyvinyl alcohol LL-02 of Japanese synthetic chemistry company and the polyvinyl alcohol LW-200, compositely proportional is 1: 1.2～2.0: 0.8～1.5.
Described initiator is a kind of compound in a kind of and peroxidation own ester of two-3,5,5 trimethylammoniums in peroxidation neodecanoic acid isopropyl benzene ester and the new peroxide tert-butyl caprate and the peroxidation dilaurate, and compositely proportional is 1: 1～2.
Described buffer reagent is bicarbonate of ammonia or sodium bicarbonate.
Described chain-transfer agent is coloured glaze base ethanol, lauryl mercaptan or trieline.
Described thermo-stabilizer is organic zinc or organotin.
Described terminator is acetone semicarbazone thiocarbamide or αJia Jibenyixi.
A kind of production method of PVC resin with ultra-low degree of polymerization, it is characterized in that: with the VCM vinyl chloride monomer, dispersion agent, initiator, pure water, buffer reagent, chain-transfer agent and thermo-stabilizer adopt polymerization process to carry out polyreaction, 60～64 ℃ of temperature of reaction, reaction pressure is less than 1.0MPa, when beginning 0～30 minute, polyreaction adds chain-transfer agent for the first time, add-on is 0.005～0.012% of a VCM vinyl chloride monomer amount, add chain-transfer agent for the second time during in polyreaction to 60～90 minute, add-on is 0.005～0.02% of an amount of monomer, as polymerization pressure decline 0.01～0.2MPa, add terminator and stop polyreaction.
Described dispersion agent is a kind of among polyvinyl alcohol GH20, the polyvinyl alcohol KH20 of Japanese synthetic chemistry company and the polyvinyl alcohol KH17, and a kind of among the Vltra tears E50 of Dow Chemical company and the Vltra tears F50, a kind of compound with among the polyvinyl alcohol LL-02 of Japanese synthetic chemistry company and the polyvinyl alcohol LW-200, compositely proportional is 1: 1.2～2.0: 0.8～1.5.
Described initiator is a kind of compound in a kind of and peroxidation own ester of two-3,5,5 trimethylammoniums in peroxidation neodecanoic acid isopropyl benzene ester and the new peroxide tert-butyl caprate and the peroxidation dilaurate.
Described buffer reagent is bicarbonate of ammonia or sodium bicarbonate.
Described chain-transfer agent is coloured glaze base ethanol, lauryl mercaptan or trieline.
Described thermo-stabilizer is organic zinc or organotin.
Described terminator is acetone semicarbazone thiocarbamide or αJia Jibenyixi.
Employing the invention has the advantages that:
One, the present invention adopts ternary composite dispersing agent system, adopt binary peroxide initiator system, chain transfer at twice, be chosen in the specific reaction times according to specific ratio adding, the particle form and the molecular weight distribution of resin have been improved, improved the processing heat stability of resin, the polyvinyl chloride resin quality of being produced is better.
Two, the temperature of reaction in the polyreaction is 60～64 ℃, reaction pressure is less than 1.0MPa, under this temperature and pressure, carry out polyreaction and can reduce polymerization process equipment and safe requirement, reaction process is more steady, also be more prone to control, under this temperature, carry out the decomposition rate that polyreaction can reduce polyvinyl chloride resin, favourable to the thermostability that improves resin.
Three, among the present invention, chain-transfer agent is pan feeding at twice, select reinforced time of suitable chain-transfer agent and reinforced ratio, can reduce the effect of chain-transfer agent to peroxide initiator, can also reduce the influence of chain-transfer agent to dispersant system, the polyvinyl chloride resin molecular weight distribution of producing is more concentrated, and the ratio of low-molecular-weight resin is littler.
Four, the resin mean polymerisation degree that adopts the present invention to produce is stable, and control has characteristics such as apparent density height, fusion and gelling temperature are low, melting viscosity is low, the transparency is good, fusion time is short, processing characteristics is good easily.
Five, can not add softening agent in the course of processing, can not produce owing to goods aged phenomenon is quickened in plasticizer migration.
Six, this resin and other macromolecular materials have fabulous consistency and " intramolecularly plasticising " effect, and it is good to make goods transparency height, any surface finish, thermostability and flame retardant properties, are a kind of large usage quantities, PVC resin specially that purposes is wider.
Seven, chain-transfer agent among the present invention is a coloured glaze base ethanol, lauryl mercaptan or trieline, under identical chain transfer agent concentration, what reduce polyvinyl chloride polymerization degree ability maximum is coloured glaze base ethanol, next is a lauryl mercaptan, the ability of trieline is minimum, a large amount of coalescences of the thin basic ethanol fine drop of chain-transfer agent have not only promoted to pile up a large amount of formation of hole, the polyvinyl chloride resin particle that obtains is the many cells particle, the granule interior porosity increases, and the collision of drop, in the merging process, the part dispersion agent of drop surface adsorption is also forced to take part feed liquor to drip inside, more dispersion agent can be adsorbed from aqueous phase again in drop surface after the merging, disperse phase viscosity is reduced, and after coloured glaze base alcohol concn surpasses certain value, the interfacial tension of monomer-water also can improve, and the deformation extent of drop reduces, and therefore the polyvinyl chloride resin particulate regularity that obtains is relatively good.
Eight, the chain-transfer agent among employing the present invention, as dredging basic ethanol, porosity reduces between the primary particle, pile up porosity and obviously improve, increased the size of primary particle, weaken gathering, after having added coloured glaze base ethanol, the pore size distribution change is tending towards concentrated between particle, has improved the regularity of polyvinyl chloride resin.
Nine, the present invention adds the reinforced selection of time of chain-transfer agent when polyreaction begins 0～30 minute for the first time, add during in polyreaction to 60～90 minute for the second time, so both guaranteed the add-on of chain-transfer agent, under suitable transformation efficiency situation, add chain-transfer agent and can bring into play the regulating effect of chain-transfer agent to greatest extent the polyvinyl chloride (PVC) RESINS molecular weight, can reduce simultaneously the instantaneous concentration of chain-transfer agent in the polymerization system again to greatest extent, limit the influence of chain-transfer agent polymeric dispersant system and binary peroxide initiator system.
Ten, the polyvinyl chloride resin mean polymerisation degree of the present invention's production reaches below 500, have characteristics such as apparent density height, fusion and gelling temperature are low, melting viscosity is low, the transparency is good, fusion time is short, processing characteristics is good, temperature of reaction, pressure are lower, the easier control of reaction process, requirement to polymerization unit is lower, the polyvinyl chloride resin particle of producing is more regular, and size distribution is more concentrated, and the resin mean polymerisation degree is stable.
Embodiment
Embodiment 1
A kind of PVC resin with ultra-low degree of polymerization comprises the component of following parts by weight:
100 parts of VCM vinyl chloride monomers,
150 parts of pure water,
0.4 part of dispersion agent,
0.02 part of buffer reagent,
0.04 part of initiator,
0.01 part of chain-transfer agent,
0.3 part of thermo-stabilizer,
0.3 part of terminator.
Wherein, dispersion agent comprises the Vltra tears E50 of polyvinyl alcohol GH20, Dow Chemical company of Japanese synthetic chemistry company and the polyvinyl alcohol LL-02 of Japanese synthetic chemistry company, and polyvinyl alcohol GH20: Vltra tears E50: polyvinyl alcohol LL-02 is 1: 1.2: 0.8.
Initiator comprises peroxidation neodecanoic acid isopropyl benzene ester and the own ester of peroxidation two-3,5,5 trimethylammoniums, and peroxidation neodecanoic acid isopropyl benzene ester: peroxidation two-3, the own ester of 5,5 trimethylammoniums is 1: 1.
In addition, buffer reagent is selected bicarbonate of ammonia for use.Chain-transfer agent is selected coloured glaze base ethanol for use.Thermo-stabilizer is selected organic zinc for use.Terminator is selected the acetone semicarbazone thiocarbamide for use.
A kind of production method of PVC resin with ultra-low degree of polymerization, with the VCM vinyl chloride monomer, dispersion agent, initiator, pure water, buffer reagent, chain-transfer agent and thermo-stabilizer adopt conventional polymerization process to carry out polyreaction, temperature of reaction is controlled at 60 ℃, reaction pressure is less than 1.0MPa, before beginning, polyreaction can add chain-transfer agent for the first time, add-on is 0.005% of a VCM vinyl chloride monomer amount, when polyreaction to 60 minute, add chain-transfer agent for the second time, add-on is 0.005% of an amount of monomer, as polymerization pressure decline 0.01MPa, be that polymerisation conversion reaches at 75～85% o'clock, add terminator and stop polyreaction.
Wherein, dispersion agent is polyvinyl alcohol LL-02 compound of the Vltra tears E50 of polyvinyl alcohol GH20, Dow Chemical company of Japanese synthetic chemistry company and Japanese synthetic chemistry company, compositely proportional is 1: 1.2: 0.8, promptly polyvinyl alcohol GH20, Vltra tears E50 and polyvinyl alcohol LL-02 are dropped in the poly-unit in this ratio, can mix the back and add, also can add respectively.Different compositely proportionals can obtain the polyvinyl chloride (PVC) RESINS of different performance index.Select composite dispersing agent can make the loose type resin of better performances, can make every performance index of resin reach optimization.
Initiator is the compound of peroxidation neodecanoic acid isopropyl benzene ester and peroxidation two-3,5, the 5 own esters of trimethylammonium, and compositely proportional is 1: 1.According to the heat transfer efficiency of poly-unit with to the requirement of polymerization time, carry out the compound requirement of satisfying polymerization process according to this ratio, promptly in this ratio with peroxidation neodecanoic acid isopropyl benzene ester and peroxidation two-3,5, the own ester of 5 trimethylammoniums drops in the poly-unit, can mix the back and add, also can add respectively.Use composite initiator not only can shorten polymerization time, and can improve the at the uniform velocity performance of polyreaction.
Above-mentioned compound being meant in proportion adds reaction material in the poly-unit, can be mixed in proportion adding, also can add respectively in proportion.
In addition, buffer reagent is selected bicarbonate of ammonia for use.Chain-transfer agent is selected coloured glaze base ethanol for use.Thermo-stabilizer is selected organic zinc for use.Terminator is selected the acetone semicarbazone thiocarbamide for use.
Embodiment 2
A kind of PVC resin with ultra-low degree of polymerization comprises the component of following parts by weight:
100 parts of VCM vinyl chloride monomers,
200 parts of pure water,
0.7 part of dispersion agent,
0.04 part of buffer reagent,
0.09 part of initiator,
0.032 part of chain-transfer agent,
0.6 part of thermo-stabilizer,
0.6 part of terminator.
Among the present invention, dispersion agent comprises the Vltra tears F50 of polyvinyl alcohol KH20, Dow Chemical company of Japanese synthetic chemistry company and the polyvinyl alcohol LW-200 of Japanese synthetic chemistry company, and polyvinyl alcohol KH20: Vltra tears F50: polyvinyl alcohol LW-200 is 1: 2.0: 1.5.
Initiator comprises new peroxide tert-butyl caprate and peroxidation dilaurate, new peroxide tert-butyl caprate: the peroxidation dilaurate is 1: 2.
In addition, buffer reagent is a sodium bicarbonate.Chain-transfer agent is a lauryl mercaptan.Thermo-stabilizer is an organotin.Terminator is a αJia Jibenyixi.
A kind of production method of PVC resin with ultra-low degree of polymerization, with the VCM vinyl chloride monomer, dispersion agent, initiator, pure water, buffer reagent, chain-transfer agent and thermo-stabilizer adopt conventional polymerization process to carry out polyreaction, 64 ℃ of temperature of reaction, reaction pressure is less than 1.0MPa, when beginning 30 minutes, polyreaction adds chain-transfer agent for the first time, add-on is 0.012% of a VCM vinyl chloride monomer amount, when polyreaction to 90 minute, add chain-transfer agent for the second time, add-on is 0.02% of an amount of monomer, as polymerization pressure decline 0.2MPa, be that polymerisation conversion reaches at 75～85% o'clock, add terminator and stop polyreaction.
Wherein, dispersion agent is polyvinyl alcohol LW-200 compound of the Vltra tears F50 of polyvinyl alcohol KH20, Dow Chemical company of Japanese synthetic chemistry company and Japanese synthetic chemistry company, and three's compositely proportional is 1: 2.0: 1.5.
Initiator comprises the compound of new peroxide tert-butyl caprate and peroxidation dilaurate, and the two compositely proportional is 1: 2.
In addition, buffer reagent is a sodium bicarbonate.Chain-transfer agent is a lauryl mercaptan.Thermo-stabilizer is an organotin.Terminator is a αJia Jibenyixi.
Embodiment 3
A kind of PVC resin with ultra-low degree of polymerization comprises the component of following parts by weight:
100 parts of VCM vinyl chloride monomers,
170 parts of pure water,
0.55 part of dispersion agent,
0.03 part of buffer reagent,
0.07 part of initiator,
0.02 part of chain-transfer agent,
0.45 part of thermo-stabilizer,
0.5 part of terminator.
Among the present invention, dispersion agent comprises the Vltra tears E50 of polyvinyl alcohol KH17, Dow Chemical company of Japanese synthetic chemistry company and the polyvinyl alcohol LW-200 of Japanese synthetic chemistry company, and polyvinyl alcohol KH17: Vltra tears E50: polyvinyl alcohol LW-200 is 1: 1.7: 1.1.
Initiator comprises peroxidation neodecanoic acid isopropyl benzene ester and peroxidation dilaurate, and oxidation neodecanoic acid isopropyl benzene ester: the peroxidation dilaurate is 1: 1.5.
In addition, buffer reagent is a bicarbonate of ammonia.Chain-transfer agent is a coloured glaze base ethanol.Thermo-stabilizer is an organotin.Terminator is a αJia Jibenyixi.
A kind of production method of PVC resin with ultra-low degree of polymerization, it is characterized in that: with the VCM vinyl chloride monomer, dispersion agent, initiator, pure water, buffer reagent, chain-transfer agent and thermo-stabilizer adopt conventional polymerization process to carry out polyreaction, 62 ℃ of temperature of reaction, reaction pressure is less than 1.0MPa, when beginning 15 minutes, polyreaction adds chain-transfer agent for the first time, add-on is 0.008% of a VCM vinyl chloride monomer amount, when polyreaction to 75 minute, add chain-transfer agent for the second time, add-on is 0.0075% of an amount of monomer, when polymerization pressure decline 0.1MPa, be that polymerisation conversion reaches at 75～85% o'clock, add terminator and stop polyreaction.
Wherein, dispersion agent is polyvinyl alcohol LW-200 compound of the Vltra tears E50 of polyvinyl alcohol KH17, Dow Chemical company of Japanese synthetic chemistry company and Japanese synthetic chemistry company, and polyvinyl alcohol KH17, Vltra tears E50 and polyvinyl alcohol LW-200 compositely proportional are 1: 1.7: 1.1.
Initiator is the compound of peroxidation neodecanoic acid isopropyl benzene ester and peroxidation dilaurate, and the compositely proportional of oxidation neodecanoic acid isopropyl benzene ester and peroxidation dilaurate is 1: 1.5.
In addition, buffer reagent is a bicarbonate of ammonia.Chain-transfer agent is a coloured glaze base ethanol.Thermo-stabilizer is an organotin.Terminator is a αJia Jibenyixi.
Embodiment 4
A kind of PVC resin with ultra-low degree of polymerization comprises the component of following parts by weight:
100 parts of VCM vinyl chloride monomers,
190 parts of pure water,
0.6 part of dispersion agent,
0.035 part of buffer reagent,
0.08 part of initiator,
0.030 part of chain-transfer agent,
0.5 part of thermo-stabilizer,
0.5 part of terminator.
Among the present invention, dispersion agent comprises the Vltra tears F50 of polyvinyl alcohol KH20, Dow Chemical company of Japanese synthetic chemistry company and the polyvinyl alcohol LL-02 of Japanese synthetic chemistry company, and polyvinyl alcohol KH20: Vltra tears F50: polyvinyl alcohol LL-02 is 1: 1.9: 1.4.
Initiator comprises peroxidation neodecanoic acid isopropyl benzene ester and peroxidation dilaurate, and peroxidation neodecanoic acid isopropyl benzene ester: the peroxidation dilaurate is 1: 1.9.
A kind of production method of PVC resin with ultra-low degree of polymerization, with the VCM vinyl chloride monomer, dispersion agent, initiator, pure water, buffer reagent, chain-transfer agent and thermo-stabilizer adopt conventional polymerization process to carry out polyreaction, 63.5 ℃ of temperature of reaction, reaction pressure is less than 1.0MPa, when beginning 25 minutes, polyreaction adds chain-transfer agent for the first time, add-on is 0.011% of a VCM vinyl chloride monomer amount, when polyreaction to 85 minute, add chain-transfer agent for the second time, add-on is 0.01% of an amount of monomer, as polymerization pressure decline 0.18MPa, be that polymerisation conversion reaches at 75～85% o'clock, add terminator and stop polyreaction.
Wherein, dispersion agent is polyvinyl alcohol LL-02 compound of the Vltra tears F50 of polyvinyl alcohol KH20, Dow Chemical company of Japanese synthetic chemistry company and Japanese synthetic chemistry company, and the compositely proportional of polyvinyl alcohol KH20, Vltra tears F50 and polyvinyl alcohol LL-02 is 1: 1.9: 1.4.
Initiator is the compound of peroxidation neodecanoic acid isopropyl benzene ester and peroxidation dilaurate, and the compositely proportional of peroxidation neodecanoic acid isopropyl benzene ester and peroxidation dilaurate is 1: 1.9.
Obviously; those of ordinary skill in the art is according to technical knowledge of being grasped and customary means; according to above said content, can also make the various ways that does not break away from basic fundamental thought of the present invention, these pro forma conversion are all within protection scope of the present invention.
Claims (10)
1, a kind of PVC resin with ultra-low degree of polymerization is characterized in that, comprises the component of following parts by weight:
100 parts of VCM vinyl chloride monomers,
150～200 parts of pure water,
0.4～0.7 part of dispersion agent,
0.02～0.04 part of buffer reagent,
0.04～0.09 part of initiator,
0.01～0.032 part of chain-transfer agent,
0.3～0.6 part of thermo-stabilizer,
0.3～0.6 part of terminator.
2, PVC resin with ultra-low degree of polymerization according to claim 1, it is characterized in that: described dispersion agent is a kind of among polyvinyl alcohol GH20, the polyvinyl alcohol KH20 of Japanese synthetic chemistry company and the polyvinyl alcohol KH17, and a kind of among the Vltra tears E50 of Dow Chemical company and the Vltra tears F50, a kind of compound with among the polyvinyl alcohol LL-02 of Japanese synthetic chemistry company and the polyvinyl alcohol LW-200, compositely proportional is 1: 1.2～2.0: 0.8～1.5.
3, PVC resin with ultra-low degree of polymerization according to claim 1, it is characterized in that: described initiator is a kind of and peroxidation two-3 in peroxidation neodecanoic acid isopropyl benzene ester and the new peroxide tert-butyl caprate, 5, a kind of compound in own ester of 5 trimethylammoniums and the peroxidation dilaurate, compositely proportional is 1: 1～2.
4, according to claim 1,2 or 3 described PVC resin with ultra-low degree of polymerization, it is characterized in that: described buffer reagent is bicarbonate of ammonia or sodium bicarbonate.
5, according to claim 1,2 or 3 described PVC resin with ultra-low degree of polymerization, it is characterized in that: described chain-transfer agent is coloured glaze base ethanol, lauryl mercaptan or trieline.
6, according to claim 1,2 or 3 described PVC resin with ultra-low degree of polymerization, it is characterized in that: described thermo-stabilizer is organic zinc or organotin.
7, according to claim 1,2 or 3 described PVC resin with ultra-low degree of polymerization, it is characterized in that: described terminator is acetone semicarbazone thiocarbamide or αJia Jibenyixi.
8, a kind of production method of PVC resin with ultra-low degree of polymerization, it is characterized in that: with the VCM vinyl chloride monomer, dispersion agent, initiator, pure water, buffer reagent, chain-transfer agent and thermo-stabilizer adopt polymerization process to carry out polyreaction, 60～64 ℃ of temperature of reaction, reaction pressure is less than 1.0MPa, when beginning 0～30 minute, polyreaction adds chain-transfer agent for the first time, add-on is 0.005～0.012% of a VCM vinyl chloride monomer amount, add chain-transfer agent for the second time during in polyreaction to 60～90 minute, add-on is 0.005～0.02% of an amount of monomer, as polymerization pressure decline 0.01～0.2MPa, add terminator and stop polyreaction.
9, the production method of PVC resin with ultra-low degree of polymerization according to claim 8, it is characterized in that: described dispersion agent is a kind of among polyvinyl alcohol GH20, the polyvinyl alcohol KH20 of Japanese synthetic chemistry company and the polyvinyl alcohol KH17, and a kind of among the Vltra tears E50 of Dow Chemical company and the Vltra tears F50, a kind of compound with among the polyvinyl alcohol LL-02 of Japanese synthetic chemistry company and the polyvinyl alcohol LW-200, compositely proportional is 1: 1.2～2.0: 0.8～1.5.
10, the production method of PVC resin with ultra-low degree of polymerization according to claim 8, it is characterized in that: described initiator is a kind of and peroxidation two-3 in peroxidation neodecanoic acid isopropyl benzene ester and the new peroxide tert-butyl caprate, a kind of compound in own ester of 5,5 trimethylammoniums and the peroxidation dilaurate.
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| CN104231307A (en) * | 2013-06-09 | 2014-12-24 | 上海氯碱化工股份有限公司 | Application of hydrotalcite-like compound, heat stabilizer, PVC resin with ultra-low polymerization degree and production method |
| CN107602745A (en) * | 2017-09-30 | 2018-01-19 | 北京化工大学 | Ultra low polymerization degree polyvinyl chloride nano particle and preparation method thereof |
| CN109400784A (en) * | 2018-10-19 | 2019-03-01 | 新疆中泰化学股份有限公司 | Ultra low polymerization degree vinyl chloride-butyl acrylate copolymer resins and preparation method thereof |
| CN112745597A (en) * | 2020-12-28 | 2021-05-04 | 宜宾海丰和锐有限公司 | High-impact-resistance transparent PVC (polyvinyl chloride) medical material and preparation method thereof |
| CN113388055A (en) * | 2021-06-28 | 2021-09-14 | 天伟化工有限公司 | Low-polymerization-degree polyvinyl chloride special resin |
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2009
- 2009-09-25 CN CN2009101677530A patent/CN101665548B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104231307A (en) * | 2013-06-09 | 2014-12-24 | 上海氯碱化工股份有限公司 | Application of hydrotalcite-like compound, heat stabilizer, PVC resin with ultra-low polymerization degree and production method |
| CN107602745A (en) * | 2017-09-30 | 2018-01-19 | 北京化工大学 | Ultra low polymerization degree polyvinyl chloride nano particle and preparation method thereof |
| CN107602745B (en) * | 2017-09-30 | 2019-12-24 | 北京化工大学 | Polyvinyl chloride nano particle with ultralow polymerization degree and preparation method thereof |
| CN109400784A (en) * | 2018-10-19 | 2019-03-01 | 新疆中泰化学股份有限公司 | Ultra low polymerization degree vinyl chloride-butyl acrylate copolymer resins and preparation method thereof |
| CN112745597A (en) * | 2020-12-28 | 2021-05-04 | 宜宾海丰和锐有限公司 | High-impact-resistance transparent PVC (polyvinyl chloride) medical material and preparation method thereof |
| CN113388055A (en) * | 2021-06-28 | 2021-09-14 | 天伟化工有限公司 | Low-polymerization-degree polyvinyl chloride special resin |
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| CN101665548B (en) | 2012-07-18 |
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