CN101544719B - Method for producing chlorinated polyvinyl chloride processing modified adjuvant - Google Patents
Method for producing chlorinated polyvinyl chloride processing modified adjuvant Download PDFInfo
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- CN101544719B CN101544719B CN2009101167400A CN200910116740A CN101544719B CN 101544719 B CN101544719 B CN 101544719B CN 2009101167400 A CN2009101167400 A CN 2009101167400A CN 200910116740 A CN200910116740 A CN 200910116740A CN 101544719 B CN101544719 B CN 101544719B
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Abstract
The present invention relates to a method for producing chlorinated polyvinyl chloride processing modified adjuvant, including the steps of emulsion copolymerization, emulsion breaking, washing, centrifugation, drying and the like of Alpha-methylstyrene and methylmethacrylate mixing monomer, so as to obtain the chlorinated polyvinyl chloride processing modified adjuvant. It is capable of improving the plasticizing performance of the chlorinated polyvinyl chloride without an adverse effect to the heat resistance deformation performance of the chlorinated polyvinyl chloride, by means of adding the adjuvant into the chlorinated polyvinyl chloride.
Description
Technical field
The present invention relates to a kind of production method of chlorinated polyvinyl chloride processing modified adjuvant.
Background technology
Chlorinated polyvinyl chloride (CPVC) is a further chlorating product of polyvinyl chloride (PVC), than polyvinyl chloride bigger tensile strength, higher softening temperature and heat-drawn wire, superior performance such as high temperature resistant, anticorrosive and fire-retardant are arranged, be widely used in supply and drain water system, cable shoe system and industrial tubing system etc. under the heat-resisting or corrosion-resistant environment, development prospect is very wide.But CPVC resin melt viscosity height, machine-shaping difficulty in the use causes the application of CPVC resin to be restricted.Therefore, in the course of processing of CPVC, must add the properties-correcting agent of different sorts and quantity to improve its processing and use properties.
In the CPVC production of articles, generally use chlorinatedpolyethylene (CPE), acrylic elastomer (ACR), methyl methacrylate-butadiene-styrene copolymer resin (MBS) etc. that CPVC is carried out modification at present.The use of these modified resin, processing and the shock resistance of CPVC have been improved, but because above properties-correcting agent generally has lower second-order transition temperature, when improving CPVC processing and mechanical property, generally cause the decline of CPVC goods heat-drawn wire, make the superior characteristics of CPVC resin heat-resistant deforming performance fail to be not fully exerted.
Poly alpha methylstyrene causes the sterically hindered increase of molecular chain owing to contain methyl side groups and phenyl side group in its structural unit, and the internal rotation of the molecular chain degree of being obstructed is higher.Therefore, the homopolymer of alpha-methyl styrene or multipolymer generally have high glass transition.Blend alloy as U.S. Pat 4710533 adopts poly alpha methylstyrene and styrene-acrylonitrile copolymer and CPVC to make has good processing characteristics and high heat distortion temperature; But this method needs poly alpha methylstyrene and the compound use of styrene-acrylonitrile copolymer, and is to improve the consistency of poly alpha methylstyrene and CPVC, more loaded down with trivial details.Chinese invention patent CN1451670A adopts alpha-methyl styrene-acrylonitrile-styrene terpolymer as properties-correcting agent, can obviously improve the processing stability of CPVC; But this multipolymer adopts three kinds of monomer copolymerizations synthetic, and the mechanism complexity is wayward.
Summary of the invention
For improving the processing characteristics of CPVC resin, and in raising CPVC processing characteristics, keep the original good heat-resistant deforming performance of CPVC, the invention provides a kind of CPVC processing modified adjuvant and production method thereof, promptly adopt method of emulsion polymerization to make alpha-methyl styrene and methyl methacrylate carry out copolymerization, obtain the production method of CPVC processing modified adjuvant.
A kind of chlorinated polyvinyl chloride processing modified adjuvant and production method thereof, the copolymerization, breakdown of emulsion, washing, centrifugal, the drying step that comprise alpha-methyl styrene and methyl methacrylate mix monomer, obtain the CPVC processing modified adjuvant, in CPVC, add this modified additive, can effectively improve the plasticizing capacity of CPVC and its heat-resistant deforming performance is had no adverse effects.
The concrete operations step is as follows:
A kind of chlorinated polyvinyl chloride modified additive and production method thereof comprise following operation steps:
(1) adopts the emulsion method synthesis technique, in deionized water, add emulsifying agent, mix monomer and initiator, molecular weight regulator;
(2) stirring and emulsifying 30min;
(3) above material is warming up to 80 ℃ and carries out polymerization 8h, be warming up to 90 ℃ of slaking 2h, cooling discharge, emulsion are through breakdown of emulsion, washing, centrifugal, the dry CPVC processing modified adjuvant that gets.
The present invention makes full use of alpha-methyl styrene polymer and has high glass-transition temperature and polymethylmethacrylate and the good characteristics of CPVC consistency, alpha-methyl styrene and methyl methacrylate are carried out copolymerization, preparation CPVC processing modified adjuvant, it is easy to have technology, be easy to control, the characteristics that modification CPVC effect is good.
Useful technique effect of the present invention is: add the CPVC processing modified adjuvant that present method makes in CPVC, CPVC is improved in processing characteristics, simultaneously its heat-resistant deforming performance is had no adverse effects, thereby the over-all properties of CPVC resin is effectively improved.
Embodiment
Below in conjunction with embodiment the present invention is done to describe further.
Embodiment 1
In the reactor of 200L, add deionized water 90kg, Sodium dodecylbenzene sulfonate 180g, Potassium Persulphate 300g, uncle's lauryl mercaptan 300g, alpha-methyl styrene and methyl methacrylate mass ratio are 45: 55 mix monomer 60kg, the capping still.Behind the stirring and emulsifying 30min, heating up makes temperature of charge keep 80 ℃ to carry out polyreaction 8h, be warming up to 90 ℃ of slaking 2h afterwards, be cooled to 50 ℃.Add the alum liquor breakdown of emulsion in emulsion, use deionized water wash three times, put the whizzer centrifuge dehydration, get white powdery CPVC processing modified adjuvant 57.6kg through vacuum-drying, monomer conversion is 95.7%.Under 25 ℃, be 41mPas with the viscosity of its 20% toluene solution of rotary viscosity design determining, the percent of pass of 0.595mm aperture sieve is 97.53%.
Embodiment 2
In the reactor of 200L, add deionized water 90kg, sodium lauryl sulphate 1800g, Sodium Persulfate 600g, uncle's lauryl mercaptan 90g, alpha-methyl styrene and methyl methacrylate mass ratio are 60: 40 mix monomer 60kg.
All the other are identical with the operation steps of embodiment 1.Get white powdery CPVC processing modified adjuvant 58.1kg, monomer conversion is 96.8%.Under 25 ℃, be 44mPas with the viscosity of its 20% toluene solution of rotary viscosity design determining, the percent of pass of 0.595mm aperture sieve is 98.31%.
Embodiment 3
In the reactor of 200L, add deionized water 90kg, polyoxyethylene nonylphenol ether 1200g, ammonium persulphate 1200g, uncle's lauryl mercaptan 60g, alpha-methyl styrene and methyl methacrylate mass ratio are 70: 30 mix monomer 60kg.
All the other are identical with the operation steps of embodiment 1.Get white powdery CPVC processing modified adjuvant 58.4kg, monomer conversion is 97.3%.Under 25 ℃, be 43mPas with the viscosity of its 20% dichloroethane solution of rotary viscosity design determining, the percent of pass of 0.595mm aperture sieve is 98.87%.
Embodiment 4
CPVC (cl content 67%), processing modified adjuvant and other auxiliary agents (seen the following form) according to a certain ratio places high mixer, mixes 3min, under the plasticization temperature, mixing 5min on twin-roll plastic mixing mill, the thin-pass several, following sheet, pressurization 5min moulding on thermocompressor under the 195 ℃ * 7.5MPa; The setting of colding pressing under the 10MPa.With the print that makes, make test sample by relevant criterion.Tensile property is measured by GB/T1633-2000 by GB/T16421-1996, dimension card (Vicat) softening temperature.The results are shown in following table:
The preparation prescription and the performance of CPVC and modified additive multipolymer
Above result shows that the blend of this modified additive and CPVC has lower plasticization temperature, and tensile strength and elongation all are higher than pure CPVC.This modified resin can effectively improve the plasticizing capacity of CPVC, compares with CPVC, and its Vicat softening temperature does not occur descending and also slightly rises.Illustrate that this modified resin is used for the CPVC modification and has better comprehensive performance.
Claims (5)
1. the production method of a chlorinated polyvinyl chloride (CPVC) processing modified adjuvant, it is characterized in that: it operation steps that comprises is:
1) stirs down, in reactor, add deionized water, emulsifying agent, initiator, molecular weight regulator and vinyl mix monomer successively;
2) capping still, stirring and emulsifying 30min;
3) carry out graft polymerization 8h at 80 ℃, be warming up to 95 ℃ of slaking 2h, be cooled to 80 ℃ and vacuumize and remove unreacted monomer 1h, be cooled to 50 ℃ of dischargings again;
4) with the emulsion that obtains through breakdown of emulsion, washing, centrifugal, be drying to obtain the CPVC processing modified adjuvant;
Described vinyl mix monomer is made up of alpha-methyl styrene and methyl methacrylate, and its quality proportioning is alpha-methyl styrene/methyl methacrylate=45～70: 55～30.
2. the production method of a kind of CPVC processing modified adjuvant according to claim 1 is characterized in that: the mass ratio of described vinyl mix monomer and deionized water is the vinyl mix monomer: deionized water=1: 1.5.
3. the production method of a kind of CPVC processing modified adjuvant according to claim 1, it is characterized in that: described emulsifying agent is a sodium alkyl benzene sulfonate, or be sodium alkyl sulfate, or be polyoxyethylene nonylphenol ether, its consumption is 0.3～3.0% of a mix monomer quality.
4. the production method of a kind of CPVC processing modified adjuvant according to claim 1 is characterized in that: described initiator is a Potassium Persulphate, or is Sodium Persulfate, or is ammonium persulphate, and its consumption is 0.5%～2.0% of a mix monomer quality.
5. the production method of a kind of CPVC processing modified adjuvant according to claim 1 is characterized in that: described molecular weight regulator is uncle's lauryl mercaptan, and its consumption is 0.1～0.5% of a mix monomer quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101167400A CN101544719B (en) | 2009-05-11 | 2009-05-11 | Method for producing chlorinated polyvinyl chloride processing modified adjuvant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101167400A CN101544719B (en) | 2009-05-11 | 2009-05-11 | Method for producing chlorinated polyvinyl chloride processing modified adjuvant |
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| Publication Number | Publication Date |
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| CN101544719A CN101544719A (en) | 2009-09-30 |
| CN101544719B true CN101544719B (en) | 2011-05-04 |
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| CN2009101167400A Expired - Fee Related CN101544719B (en) | 2009-05-11 | 2009-05-11 | Method for producing chlorinated polyvinyl chloride processing modified adjuvant |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417679B (en) * | 2011-11-23 | 2014-05-07 | 山东瑞丰高分子材料股份有限公司 | External lubricant for polyvinyl chloride (PVC) resin forming and processing and production method thereof |
| CN107474319A (en) * | 2017-08-26 | 2017-12-15 | 安徽胜利精密制造科技有限公司 | A kind of notebook computer casing injection molding heat-resistant deforming auxiliary agent |
| CN110804125A (en) * | 2019-11-26 | 2020-02-18 | 杭州鸿雁管道***科技有限公司 | α -methylstyrene bipolymer in preparing PVC-U transparent electrical casing pipe application |
| CN115181204B (en) * | 2022-07-05 | 2023-08-29 | 无锡洪汇新材料科技股份有限公司 | Chlorinated vinyl polymer and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4710533A (en) * | 1986-08-11 | 1987-12-01 | The B. F. Goodrich Company | Melt processable CPVC blends |
| CN1032797A (en) * | 1987-08-14 | 1989-05-10 | B·F·谷德里奇公司 | Polyvinyl chloride (PVC) is crossed polymkeric substance |
| CN1312298A (en) * | 2001-03-07 | 2001-09-12 | 威海市金泓化工集团有限公司 | Shock resisting polyvinyl chloride modifier |
| CN1386125A (en) * | 2000-08-08 | 2002-12-18 | 钟渊化学工业株式会社 | Expandable vinyl chloride resin composition |
| CN1451670A (en) * | 2002-04-13 | 2003-10-29 | 沂源瑞丰高分子材料有限公司 | Chlorizated polyvinyl chloride processing modifier |
-
2009
- 2009-05-11 CN CN2009101167400A patent/CN101544719B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4710533A (en) * | 1986-08-11 | 1987-12-01 | The B. F. Goodrich Company | Melt processable CPVC blends |
| CN1032797A (en) * | 1987-08-14 | 1989-05-10 | B·F·谷德里奇公司 | Polyvinyl chloride (PVC) is crossed polymkeric substance |
| CN1386125A (en) * | 2000-08-08 | 2002-12-18 | 钟渊化学工业株式会社 | Expandable vinyl chloride resin composition |
| CN1312298A (en) * | 2001-03-07 | 2001-09-12 | 威海市金泓化工集团有限公司 | Shock resisting polyvinyl chloride modifier |
| CN1451670A (en) * | 2002-04-13 | 2003-10-29 | 沂源瑞丰高分子材料有限公司 | Chlorizated polyvinyl chloride processing modifier |
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