CN1432617A - Prepn Process of polyethylene adhesive for anticorrosion of steel pipe - Google Patents
Prepn Process of polyethylene adhesive for anticorrosion of steel pipe Download PDFInfo
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- CN1432617A CN1432617A CN 02112550 CN02112550A CN1432617A CN 1432617 A CN1432617 A CN 1432617A CN 02112550 CN02112550 CN 02112550 CN 02112550 A CN02112550 A CN 02112550A CN 1432617 A CN1432617 A CN 1432617A
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- polyethylene
- anticorrosion
- steel pipe
- static mixer
- die head
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Abstract
The preparation process of the present invention is the heat initiated grafting reaction of polyethylene as basic resin and maleic anhydride as grafting monomer in heat initiated grafting reactor. Polar functional group is grafted to polyethylene molecular chain to produce the polyethylene adhesive for anticorrosion of steel pipe. The heat initiated grafting reactor consists of screw extruder, static mixer, and die head connected successively. Maleic anhydride as grafting monomer and polyethylene as basic resin are extruded from the screw extruder to the static mixer, from the static mixer to the die head and out of the die head. The said process has the advantages of less investment in equipment, and the product has the advantages of high flowability and low gel content.
Description
One, technical field:
The present invention is a kind of preparation method of macromolecule adhesive, especially a kind of method for preparing Process of polyethylene adhesive for anticorrosion of steel pipe with the thermal booster reaction grafting method.
Two, background technology:
The method for preparing at present tackiness agent mainly contains two kinds of fusion-grafting and solution graft copolymerizations, patent CN1109001A, CN1125739A, CN1143102A, CN85105447A have introduced the whole bag of tricks of preparation graft product, mainly concentrate on methods such as fusion-grafting, solution graft copolymerization, solid phase grafting, be mainly two kinds of fusion-grafting and solution graft copolymerizations.Adopt solution graft copolymerization to prepare the shortcoming that tackiness agent exists complicated process of preparation, cost height, difficult solvent recovery.Adopt the preparation of fusion-grafting method to exist the tackiness agent of preparation to coagulate the high shortcoming of content, influence the processing characteristics of tackiness agent.
Three, summary of the invention:
(1) goal of the invention
The purpose of this invention is to provide that a kind of equipment cost is low, the preparation method of product good flowing properties, Process of polyethylene adhesive for anticorrosion of steel pipe that gel content is low.
(2) technical scheme
The preparation method of Process of polyethylene adhesive for anticorrosion of steel pipe of the present invention carries out the thermal initiation graft reaction with base resin polyethylene and grafted monomer maleic anhydride in thermal initiation graft reaction device, polar functional group in grafting on the sub polyethylene subchain, thereby generation Process of polyethylene adhesive for anticorrosion of steel pipe, thermal initiation graft reaction device is by screw extrusion press, static mixer, die head is linked in sequence and forms, grafted monomer maleic anhydride and base resin polyethylene are extruded into the static mixer from screw extrusion press, and then calm and unhurried static mixer is clamp-oned die head, extrude from die head at last, the thermal initiation graft reaction that in static mixer, carries out, its temperature of reaction is 250 ℃～430 ℃, the Heating temperature of the screw extrusion press in the thermal initiation graft reaction device is 150 ℃～250 ℃, the add-on of maleic anhydride accounts for 0.5～2% of raw material gross weight, and all the other are polyethylene.
(3) technique effect
Adopt method of the present invention to prepare Process of polyethylene adhesive for anticorrosion of steel pipe and compared with prior art have 1. equipment less investment: armamentarium only needs a forcing machine and connects a static mixer in the exit of forcing machine, connects a die head in the exit of static mixer.2. the good fluidity of product: grafting base resin polyethylene melt flow rate is 4 grams/10 minutes, the general method of fusion-grafting that adopts is produced tackiness agent, its melt flow rate (MFR) is 2.5 grams/10 minutes, and its melt flow rate (MFR) of product of the present invention is 4.5 grams/10 minutes.3. gel content is low: generally adopt the tackiness agent of the method production of fusion-grafting, its gel content is 1.2%, and product gel content of the present invention is 0.4%.
Four, description of drawings:
Fig. 1 is the structural representation of thermal initiation graft reaction device of the present invention.Screw extrusion press 1, opening for feed 11, static mixer 2, die head 3 are wherein arranged.
Five, embodiment
A, grafted monomer adopt maleic anhydride, and base resin is a polyethylene;
B, do not add peroxide initiator, but also can add a small amount of, below the 1%wt;
C, thermal initiation graft reaction device are made up of screw extrusion press and static mixer and die head, and wherein screw extrusion press can be a single screw extrusion machine, also can be twin screw extruders.Thermal initiation graft reaction device is linked in sequence and is formed by screw extrusion press 1, static mixer 2, die head 3, grafted monomer maleic anhydride and base resin polyethylene go out machine 1 from screw rod and are extruded into the static mixer 2, and then clamp-on die head 3, extrude from die head 3 at last from static mixer 2;
D, thermal initiation graft reaction carry out in static mixer, and temperature of reaction is controlled at 250～430 ℃ of scopes;
E, screw extrusion press mainly work to make material fusion, conveying, and temperature is controlled at 150～290 ℃ of scopes;
Die head before f, the static mixer plays the effect of cooling material;
G, technological process.
With maleic anhydride, base resin and auxiliary agent uniform mixing, add screw extrusion press, the temperature of screw extrusion press is 150 ℃～290 ℃, enter and carry out the thermal initiation graft reaction in the static mixer, temperature of reaction is 250 ℃～430 ℃, reacts under these processing condition, extrudes and obtains product.Base resin polyethylene and grafted monomer maleic anhydride are carried out the thermal initiation graft reaction in thermal initiation graft reaction device, polar functional group in grafting on the sub polyethylene subchain, thus generate Process of polyethylene adhesive for anticorrosion of steel pipe.
Claims (5)
1, a kind of preparation method of Process of polyethylene adhesive for anticorrosion of steel pipe, it is characterized in that base resin polyethylene and grafted monomer maleic anhydride are carried out the thermal initiation graft reaction in thermal initiation graft reaction device, polar functional group in grafting on the sub polyethylene subchain, thus Process of polyethylene adhesive for anticorrosion of steel pipe generated.
2, the preparation method of Process of polyethylene adhesive for anticorrosion of steel pipe according to claim 1, it is characterized in that thermal initiation graft reaction device is linked in sequence and is formed by screw extrusion press (1), static mixer (2), die head (3), grafted monomer maleic anhydride and base resin polyethylene are extruded into the static mixer (2) from screw extrusion press (1), and then clamp-on die head (3), extrude from die head (3) at last from static mixer (2).
3, the preparation method of a kind of Process of polyethylene adhesive for anticorrosion of steel pipe according to claim 1 and 2 is characterized in that the thermal initiation graft reaction that carries out in static mixer, its temperature of reaction is 250 ℃～430 ℃.
4, the preparation method of a kind of Process of polyethylene adhesive for anticorrosion of steel pipe according to claim 1 and 2, the Heating temperature that it is characterized in that the screw extrusion press (1) in the thermal initiation graft reaction device is 150 ℃～250 ℃.
5, the preparation method of a kind of Process of polyethylene adhesive for anticorrosion of steel pipe according to claim 1 is characterized in that the add-on of maleic anhydride accounts for 0.5～2% of raw material gross weight, and all the other are polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02112550 CN1432617A (en) | 2002-01-17 | 2002-01-17 | Prepn Process of polyethylene adhesive for anticorrosion of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02112550 CN1432617A (en) | 2002-01-17 | 2002-01-17 | Prepn Process of polyethylene adhesive for anticorrosion of steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1432617A true CN1432617A (en) | 2003-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02112550 Pending CN1432617A (en) | 2002-01-17 | 2002-01-17 | Prepn Process of polyethylene adhesive for anticorrosion of steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1432617A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348678C (en) * | 2006-04-27 | 2007-11-14 | 王成人 | Black polyethylene anticorrosion adhesive for buried steel pipeline |
| CN101899275A (en) * | 2010-07-15 | 2010-12-01 | 华东理工大学 | Hot-melt adhesive for adhering with epoxy resin and preparation method thereof |
| CN101725774B (en) * | 2009-12-17 | 2011-07-27 | 河北金菱管业股份有限公司 | Mine wear-resistant composite metal plastic pipe, special preparation equipment thereof and preparation method thereof |
| CN102399519A (en) * | 2011-12-24 | 2012-04-04 | 山东东宏管业有限公司 | Hot melt adhesive for steel plastic composite pipeline and production method of hot melt adhesive |
-
2002
- 2002-01-17 CN CN 02112550 patent/CN1432617A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348678C (en) * | 2006-04-27 | 2007-11-14 | 王成人 | Black polyethylene anticorrosion adhesive for buried steel pipeline |
| CN101725774B (en) * | 2009-12-17 | 2011-07-27 | 河北金菱管业股份有限公司 | Mine wear-resistant composite metal plastic pipe, special preparation equipment thereof and preparation method thereof |
| CN101899275A (en) * | 2010-07-15 | 2010-12-01 | 华东理工大学 | Hot-melt adhesive for adhering with epoxy resin and preparation method thereof |
| CN101899275B (en) * | 2010-07-15 | 2012-02-08 | 华东理工大学 | Hot-melt adhesive for adhering with epoxy resin and preparation method thereof |
| CN102399519A (en) * | 2011-12-24 | 2012-04-04 | 山东东宏管业有限公司 | Hot melt adhesive for steel plastic composite pipeline and production method of hot melt adhesive |
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