CN1432596A - Production process of polypropylene resin composite containing long branched chain - Google Patents
Production process of polypropylene resin composite containing long branched chain Download PDFInfo
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- CN1432596A CN1432596A CN 02112548 CN02112548A CN1432596A CN 1432596 A CN1432596 A CN 1432596A CN 02112548 CN02112548 CN 02112548 CN 02112548 A CN02112548 A CN 02112548A CN 1432596 A CN1432596 A CN 1432596A
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- polypropylene
- screw extruder
- resin composite
- screw rod
- polypropylene resin
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Abstract
A production process of polypropylene resin composite containing long branched chain and with strain hardening characteristic, high melt strength and no gel includes the steps of: dissolving 2,5-dimethyl-2,5-di(tert-butyl peroxide) hexane and 1,6-butanediol biacrylate in acetone at room temperature to form acetone solution of peroxide and polyfunctional group monomer; feeding polypropylene powder to double-screw extruder heated to reaction temperature via its feeding port; feeding the acetone solution via the middle feeding port so as to make peroxide, polyfunctional group monomer and polypropylene melt react inside the double-screw extruder while turning on the vacuum pump in the tail of the extruder to pump out solvent and other volatile matters; mixing with antioxidant, extruding and stoving to obtain the final product.
Description
One, technical field:
The present invention is a kind of method for preparing high melt strength, propylene, and especially a kind of preparation has the method for the high melt strength, propylene of strain hardening characteristic and gel-free.
Two, background technology:
Commercial polypropylene is a kind of isotactic, half hitch crystalline thermoplastic polymer, yet because its melt strength and strain hardening deficiency, cause its shortcoming aspect melt-processed, thereby limited its application aspect extruding coating, blowing, foaming and profile extrusion thermoforming, this is owing to be a kind of line polymer that does not have branching by Ziegler-Natta catalyst synthetic polypropylene.For obtain to have long chain branching, the high melt strength, propylene of strain hardening rheological characteristics, in recent years, various technologies and technology are indicated in document again and again, as the special CN86 of house journal of amaurosis, 100,791A, CN1,105,033A and EP190,889 adopt high energy electron irradiation to obtain the high melt strength, propylene of branching; The patent CN1 of the said firm, 045,107A and CN1,055,372A has disclosed by the superoxide polypropylene that modified polypropene powder (or grafted monomer) has obtained to have the strain hardening characteristic in polymeric kettle; Reactive extrusion technology is because it is efficient, economic and practical advantage has also obtained development faster in recent years, and begin to be applied to the production of high melt strength, propylene, as (Joural of Applied Polymer Science Vol 61.1395～1404 such as Xiaochun Wang, 1996) by homo-polypropylene and polyfunctional monomer (as pentaerythritol triacrylate), (Joural of AppliedPolymer Science Vol.66 such as Didier Graebling, 809～819,1997) by polypropylene PP and polythene PE, TMPTA TMPTA, under superoxide causes, in twin screw extruder, all obtained the high melt strength, propylene of branching.
Three, summary of the invention:
(1) goal of the invention
The purpose of this invention is to provide the manufacture method of the polypropylene resin composite that contains long-chain branch that a kind ofly has certain long chain branching, has the high melt strength, propylene of strain hardening characteristic and gel-free.
(2) technical scheme
The manufacture method that contains the polypropylene resin composite of long-chain branch of the present invention is:
Under a, the room temperature, with 2,5-dimethyl-2, two (tert-butyl hydroperoxide) hexanes of 5-and diacrylate-1, the 6-butanediol ester is dissolved in the acetone, forms the acetone soln of superoxide and polyfunctional monomer;
B, two spiral shell forcing machine heat up and maintain temperature of reaction, will not add the polypropylene powder of any additives
Spout by twin screw extruder adds screw rod;
C, at the charging opening in twin screw extruder stage casing, the acetone soln that adds superoxide and polyfunctional monomer by volume pump continuously, make superoxide, polyfunctional monomer and melt polypropylene in the reaction of the spiro rod section of twin screw extruder, the vacuum pump of opening screw rod tail simultaneously is to take out volatile matter such as desolvate;
D, obtain the finished product after further adding oxidation inhibitor, granulation again by the polypropylene GRANULES of screw rod extruding pelletization, oven dry.
When the screw rod extruding pelletization, what add trace in the polypropylene GRANULES of oven dry prevents to corrode the calcium stearate that screw rod is used.
(3) technique effect
The present invention is by adding peroxide initiator and polyfunctional monomer at twin screw extruder, make plain polypropylene and polyfunctional monomer reactive grafting, have certain long chain branching, have the high melt strength, propylene of strain hardening characteristic and gel-free with acquisition, thereby enlarged its range of application.The melt strength of the polymkeric substance that obtains is higher 3～5 times than the homo-polypropylene of similar melting index, looks MFR (melt flow rate (MFR)) difference, can be respectively applied for processed and applied such as extruding coating, blowing, foaming and profile extrusion thermoforming.
Four, embodiment:
1, under the room temperature, with 2 of 0.7ml, 5-dimethyl-2, two (tert-butyl hydroperoxide) hexanes (concentration is 85wt%, and is homemade commercially available) of 5-and diacrylate-1,6-butanediol ester (HDDA) and acetone are made into the solution of 20ml, make superoxide, the acetone soln of polyfunctional monomer;
2, (φ 30, L/D=35) heat up, and except that die head is 220 ℃, all the other each section temperature all are controlled at 200 ℃, and extruder temperature is controlled through variable valve by electrical heating wire and water coolant with twin screw extruder; The spout of 3KgF401 polypropylene powder (raise sub-petrochemical industry plastic molding and processing plant, MFR2.20g/10min does not add any additives) by twin screw extruder added screw rod, and rate of feeding is 0.3Kg/min; Simultaneously, the acetone soln of superoxide, polyfunctional monomer adds the speed of solution with 2ml/min with the accurate measurement pump from the charging opening in the middle part of the screw rod;
3, the vacuum pump of opening screw rod tail is to take out volatile matter such as desolvate;
4, further adding oxidation inhibitor 1wt%P～EPQ, 1wt%1010 and 1wt% calcium stearate (HA) by the polypropylene GRANULES of screw rod extruding pelletization, oven dry, extruding pelletization oven dry again obtains the finished product.
Claims (2)
1, a kind of manufacture method that contains the polypropylene resin composite of long-chain branch is characterized in that the method for making is:
Under a, the room temperature, with 2,5-dimethyl-2, two (tert-butyl hydroperoxide) hexanes of 5-and diacrylate-1, the 6-butanediol ester is dissolved in the acetone, forms the acetone soln of superoxide and polyfunctional monomer;
B, two spiral shell forcing machine heat up and maintain temperature of reaction, will not add the spout adding screw rod of the polypropylene powder of any additives by twin screw extruder;
C, at the charging opening in twin screw extruder stage casing, the acetone soln that adds superoxide and polyfunctional monomer by volume pump continuously, make superoxide, polyfunctional monomer and melt polypropylene in the reaction of the spiro rod section of twin screw extruder, the vacuum pump of opening screw rod tail simultaneously is to take out volatile matter such as desolvate;
D, obtain the finished product after further adding oxidation inhibitor, granulation again by the polypropylene GRANULES of screw rod extruding pelletization, oven dry.
2, a kind of manufacture method that contains the polypropylene resin composite of long-chain branch according to claim 1 is characterized in that when the screw rod extruding pelletization, adds the calcium stearate that Screw Corrosion is used that prevents of trace in the polypropylene GRANULES of oven dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02112548 CN1432596A (en) | 2002-01-17 | 2002-01-17 | Production process of polypropylene resin composite containing long branched chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02112548 CN1432596A (en) | 2002-01-17 | 2002-01-17 | Production process of polypropylene resin composite containing long branched chain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1432596A true CN1432596A (en) | 2003-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02112548 Pending CN1432596A (en) | 2002-01-17 | 2002-01-17 | Production process of polypropylene resin composite containing long branched chain |
Country Status (1)
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| CN (1) | CN1432596A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100569818C (en) * | 2008-03-06 | 2009-12-16 | 中国科学院长春应用化学研究所 | A kind of method that improves melt strength of polypropylene |
| CN1962707B (en) * | 2005-11-07 | 2010-05-05 | 中国科学院化学研究所 | Branched polypropylene and its preparation method |
| CN105250241A (en) * | 2014-07-18 | 2016-01-20 | 南京蓝登生物科技有限公司 | Transdermal patch preparation process |
-
2002
- 2002-01-17 CN CN 02112548 patent/CN1432596A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1962707B (en) * | 2005-11-07 | 2010-05-05 | 中国科学院化学研究所 | Branched polypropylene and its preparation method |
| CN100569818C (en) * | 2008-03-06 | 2009-12-16 | 中国科学院长春应用化学研究所 | A kind of method that improves melt strength of polypropylene |
| CN105250241A (en) * | 2014-07-18 | 2016-01-20 | 南京蓝登生物科技有限公司 | Transdermal patch preparation process |
| CN105250241B (en) * | 2014-07-18 | 2018-09-21 | 南京蓝登生物科技有限公司 | The preparation process of transdermal patch |
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