CN102898976A - Hot melt adhesive based on revulsive orientation of magnetic particles and preparation method of hot melt adhesive - Google Patents
Hot melt adhesive based on revulsive orientation of magnetic particles and preparation method of hot melt adhesive Download PDFInfo
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- CN102898976A CN102898976A CN201210385432XA CN201210385432A CN102898976A CN 102898976 A CN102898976 A CN 102898976A CN 201210385432X A CN201210385432X A CN 201210385432XA CN 201210385432 A CN201210385432 A CN 201210385432A CN 102898976 A CN102898976 A CN 102898976A
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- hot melt
- melt adhesive
- tackifying resin
- vinyl acetate
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Abstract
A hot melt adhesive based on revulsive orientation of magnetic particles consists of a basic hot melt adhesive and inorganic magnetic particles, mass ratios of the inorganic magnetic particles to the basic hot melt adhesive are (1-10) to 20, and components of the basic hot melt adhesive and mass percentages of the components are as follows in percentage by weight: 50 to 70% of ethylene-vinyl acetate copolymer, 20 to 40% of tackifying resin and 5 to 15% of plasticizer. A preparation method of the hot melt adhesive is as follows: adding the tackifying resin into a reaction kettle, heating to a melting point of the tackifying resin, and keeping a temperature; and then stirring, adding the ethylene-vinyl acetate copolymer into the reaction kettle after the tackifying resin is completely molten; adding the plasticizer into the reaction kettle when the tackifying resin and the ethylene-vinyl acetate copolymer are uniformly mixed; adding the inorganic magnetic particles into the reaction kettle after the components of the basic hot melt resin in the reaction kettle are uniformly mixed; and stopping mixing after substances in the reaction kettle are uniformly mixed, and obtaining the hot melt adhesive based on the revulsive orientation of the magnetic particles.
Description
Technical field
The invention belongs to the hot melt adhesive field, particularly a kind of for buried pipe-line rot-resistant hot melt adhesive and preparation method thereof.
Background technology
Oil-gas pipeline corrosion not only causes oil and gas leakage, also can cause the accidents such as fire, blast, causes the serious consequences such as environmental pollution, stop work and production even loss of life and personal injury.The anticorrosion normal employing of buried oil and gas pipes and repaired mouth coats the method for external anti-corrosion layer, external anti-corrosion layer is for applying the shrink belt of certain thickness hot melt adhesive, during use preservative coat is coated on tubing repaired mouth place, then its heating is made the hot melt adhesive melting, rely on the convergent force of its shrink belt to make hot melt adhesive be close to the joint coating on pipeline place, namely finish rotproofing.Production practice and excavation questionnaire open conduit preventing corrosion of repaired mouth layer lost efficacy mainly be not good by melt viscosity knotting strength deficiency or flowing property due to.
The problem of and construction poor fluidity bad for hot melt adhesive bonding, existing bibliographical information following improving one's methods: (1) carries out graft modification to ethylene-vinyl acetate copolymer, increasing its polarity, but along with polarity increases, the coating layer polyethylene bonding performance of itself and oil and gas pipes can descend; (2) the hot melt adhesive basic components is studied, namely determined optimum formula by the composition of Research foundation prescription, but its effect of optimization only can realize in certain limit, generally speaking still can not satisfy the requirement of Practical Project; (3) add inorganic powder or the second polymeric constituent blending and modifying, although the method has promoted adhesive property, the construction flowability descends a lot, is difficult to improve simultaneously the cohesive force of two bonding interfaces.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of hot melt adhesive based on the magnetic particle induced orientation and preparation method thereof is provided, described hot melt adhesive not only has high cohesive strength, and it is mobile to have a good construction.
Hot melt adhesive based on the magnetic particle induced orientation provided by the invention, formed by basal heat melten gel and inorganic particle, the mass ratio of inorganic particle and basal heat melten gel is 1～10 ︰ 20, and the component of described basal heat melten gel and the mass percent of each component are as follows:
Ethylene-vinyl acetate copolymer 50～70%
Tackifying resin 20～40%
Softening agent 5～15%.
Hot melt adhesive based on the magnetic particle induced orientation provided by the invention, described inorganic particle is α-Fe
2O
3, γ-Fe
2O
3, Fe
3O
4, in the cobalt, nickel, cobalt-nickel alloy, iron nickel alloy, alumino nickel any, its particle diameter is 0.1 μ m ~ 2 μ m.
Hot melt adhesive based on the magnetic particle induced orientation provided by the invention, in the described ethylene-vinyl acetate copolymer, the mass percent of vinyl acetate is 25～30%.
Hot melt adhesive based on the magnetic particle induced orientation provided by the invention, described tackifying resin is Gum Rosin or terpine resin; Described softening agent is paraffin.
Hot melt adhesive based on the magnetic particle induced orientation provided by the invention, the preferred following mass percent of the component of described basal heat melten gel:
Ethylene-vinyl acetate copolymer 50～60%
Tackifying resin 26～38%
Softening agent 7～15%.
The preparation method of the hot melt adhesive based on the magnetic particle induced orientation provided by the invention, take basal heat melten gel and inorganic particle as raw material, the mass ratio of inorganic particle and basal heat melten gel is 1～10 ︰ 20, and the component of described basal heat melten gel and the mass percent of each component are as follows:
Ethylene-vinyl acetate copolymer 50～70%
Tackifying resin 20～40%
Softening agent 5～15%;
Processing step is as follows:
Join tackifying resin in the reactor and be heated to its melting temperature and keep this temperature, then stir, after the complete melting of tackifying resin, in reactor, add ethylene-vinyl acetate copolymer, after tackifying resin and ethylene-vinyl acetate copolymer mix, in reactor, add softening agent, after each component of basal heat melten gel in the reactor mixes, in reactor, add inorganic particle, after each material in the reactor mixes, stop to stir, namely get the hot melt adhesive based on the magnetic particle induced orientation.
In the aforesaid method, described inorganic particle is α-Fe
2O
3, γ-Fe
2O
3, Fe
3O
4, in the cobalt, nickel, cobalt-nickel alloy, iron nickel alloy, alumino nickel any, its particle diameter is 0.1 μ m ~ 2 μ m.
In the aforesaid method, in the described ethylene-vinyl acetate copolymer, the mass percent of vinyl acetate is 25～30%.
In the aforesaid method, described tackifying resin is Gum Rosin or terpine resin; Described softening agent is paraffin.
In the aforesaid method, the preferred following mass percent of the raw material of basal heat melten gel:
Ethylene-vinyl acetate copolymer 50～60%
Tackifying resin 26～38%
Softening agent 7～15%.
The using method of the hot melt adhesive based on the magnetic particle induced orientation of the present invention is as follows:
Described hot-melt is overlying on the crosslinked polyethylene shrink belt, the steel tube surface polishing is extremely smooth, the heating steel pipe, and the crosslinked polyethylene shrink belt that will be coated with hot melt adhesive is close on the steel pipe, then heating described shrink belt with flame spray gun shrinks to it, meanwhile, apply thereon the hot melt adhesive melting and with crosslinked polyethylene shrink belt and steel pipe tight bond, realize the outer cladding of steel pipe.
The present invention has following beneficial effect:
1, hot melt adhesive based on the magnetic particle induced orientation of the present invention, in the basal heat melten gel, added inorganic particle, exist between magnetic particle and ethylene-vinyl acetate copolymer polar group are strong and interact, during use, there are the Magnetic force tracting effect in magnetic particle and iron-based pipeline enclosure, when the hot melt adhesive heating and melting, orientation movement occurs in the polarity of hot melt adhesive and nonpolar segment under the draw of magnetic force, be formed in the interface with tube contacts and contain more polarity segment, with contain the oriented structure of more nonpolar segment in the interface that polyethylene contacts, thereby improved similarity and the cohesive action power at two interfaces.
2, the hot melt adhesive based on the magnetic particle induced orientation of the present invention can be adjusted the molecular weight of ethylene-vinyl acetate copolymer and the content of softening agent according to different needs, adjusts the mobile purpose of its construction thereby reach, and is applied widely.
3, the invention provides a kind of method of modifying of new hot melt adhesive, the method for the invention adopts conventional equipment processing, and is simple to operate, is convenient to suitability for industrialized production.
Embodiment
Below by embodiment a kind of hot melt adhesive based on the magnetic particle induced orientation of the present invention and preparation method thereof is described further.
Embodiment 1
In the present embodiment, preparation is based on the hot melt adhesive of magnetic particle induced orientation take basal heat melten gel and inorganic particle as raw material.The basal heat melten gel is by ethylene-vinyl acetate copolymer (mass percent of vinyl acetate is 28%), tackifying resin rosin (Xichang resin processing plant produces, technical grade) and softening agent 54
#Paraffin forms, and the mass percent of each component is as follows:
Ethylene-vinyl acetate copolymer 55.6%,
Rosin 33.3%,
54
#Paraffin 11.1%.
Inorganic particle is selected Fe
3O
4, particle diameter is 1.4 μ m, Fe
3O
4With the mass ratio of above-mentioned basal heat melten gel be 3 ︰ 20.
Processing step is as follows:
Tackifying resin rosin is joined in the reactor, after being heated to the fusing point (about 90 ℃) of tackifying resin, keep this temperature, the unlatching whipping appts stirs with the speed of 30r/min, after the complete melting of tackifying resin, in reactor, add ethylene-vinyl acetate copolymer, after tackifying resin rosin and ethylene-vinyl acetate copolymer mix, add softening agent paraffin in reactor, each the basal heat melten gel component in the question response still mixes and namely obtains basal heat melten gel F
0, continue after in reactor, add Fe again
3O
4, be stirred to that each material mixes in the reactor, namely get based on Fe
3O
4The hot melt adhesive F of induced orientation
1
Embodiment 2
In the present embodiment, the component of raw material basal heat melten gel and the mass percent of each component are identical with embodiment 1, and inorganic particle and embodiment 1 are identical (to be Fe
3O
4, particle diameter 1.4 μ m).Fe
3O
4With the mass ratio of basal heat melten gel be 6 ︰ 20.
In the present embodiment, preparation is identical with embodiment 1 based on the processing step of the hot melt adhesive of magnetic particle induced orientation, obtains based on Fe
3O
4The hot melt adhesive F of induced orientation
2
Embodiment 3
In the present embodiment, the component of raw material basal heat melten gel and the mass percent of each component are identical with embodiment 1, and inorganic particle and embodiment 1 are identical (to be Fe
3O
4, particle diameter 1.4 μ m).Fe
3O
4With the mass ratio of basal heat melten gel be 9 ︰ 20.
In the present embodiment, preparation is identical with embodiment 1 based on the processing step of the hot melt adhesive of magnetic particle induced orientation, obtains based on Fe
3O
4The hot melt adhesive F of induced orientation
3
Embodiment 4
In the present embodiment, the component of raw material basal heat melten gel and the mass percent of each component are identical with embodiment 1, and inorganic particle and embodiment 1 are identical (to be Fe
3O
4, particle diameter 1.4 μ m).Fe
3O
4With the mass ratio of basal heat melten gel be 10 ︰ 20.
In the present embodiment, preparation is identical with embodiment 1 based on the processing step of the hot melt adhesive of magnetic particle induced orientation, obtains based on Fe
3O
4The hot melt adhesive F of induced orientation
4
Embodiment 5
Present embodiment is to the basal heat melten gel F according to embodiment 1 preparation
0And embodiment 1 ~ 4 preparation based on Fe
3O
4The hot melt adhesive F of induced orientation
1, F
2, F
3, F
4Carry out respectively the test of adhesive property and orientation factor.
Respectively with basal heat melten gel F
0And based on Fe
3O
4The hot melt adhesive F of magnetic particle induced orientation
1, F
2, F
3, F
4Be coated on the crosslinked polyethylene shrink belt, the steel tube surface polishing to smooth, heated steel pipe, and will be coated with F
0～F
4The polyethylene pyrocondensation belt be close on the steel pipe, then shrink to it with flame spray gun heat cross-linking polyethylene thermal contraction strap, meanwhile, apply F thereon
0～F
4The hot melt adhesive melting and with polyethylene thermal contraction strap and steel pipe tight bond.Then according to GB/T2792-1998 " pressure-sensitive adhesive tape test method " standard testing tackiness agent 180o cohesive force experimental technique respectively to described F
0～F
4Hot melt adhesive carries out peel strength test.Shearing resistance is according to ISO4587-1979 " mensuration of tackiness agent-high-strength adhesive stretching lap shear strength " standard testing, and orientation degree adopts the infrared dichroism test, and flowing property adopts the fusion index instrument test.Shown in the test result following table.
As can be seen from the above table, F
1~ F
4With F
0Compare, its stripping strength and shearing resistance all have obvious raising, add magnetic particle Fe
3O
4After, hot melt adhesive has formed oriented structure in the bonding process, the construction flowability shows as the increase of melting index also along with the adding of inorganic particle improves, and shows that the method for the invention is a kind of comparatively desirable method of improving hot melt adhesive bonding performance and construction flowability.
Claims (10)
1. hot melt adhesive based on the magnetic particle induced orientation, it is characterized in that this hot melt adhesive is comprised of basal heat melten gel and inorganic particle, the mass ratio of inorganic particle and basal heat melten gel is 1～10 ︰ 20, and the component of described basal heat melten gel and the mass percent of each component are as follows:
Ethylene-vinyl acetate copolymer 50～70%
Tackifying resin 20～40%
Softening agent 5～15%.
2. described hot melt adhesive based on the magnetic particle induced orientation according to claim 1 is characterized in that described inorganic particle is α-Fe
2O
3, γ-Fe
2O
3, Fe
3O
4, in the cobalt, nickel, cobalt-nickel alloy, iron nickel alloy, alumino nickel any, its particle diameter is 0.1 μ m ~ 2 μ m.
3. described hot melt adhesive based on the magnetic particle induced orientation according to claim 1 and 2 is characterized in that in the described ethylene-vinyl acetate copolymer that the mass percent of vinyl acetate is 25～30%.
4. described hot melt adhesive based on the magnetic particle induced orientation according to claim 1 and 2 is characterized in that described tackifying resin is Gum Rosin or terpine resin; Described softening agent is paraffin.
5. described hot melt adhesive based on the magnetic particle induced orientation according to claim 3 is characterized in that described tackifying resin is Gum Rosin or terpine resin; Described softening agent is paraffin.
6. preparation method based on the hot melt adhesive of magnetic particle induced orientation, it is characterized in that take basal heat melten gel and inorganic particle as raw material, the mass ratio of inorganic particle and basal heat melten gel is 1～10 ︰ 20, and the component of described basal heat melten gel and the mass percent of each component are as follows:
Ethylene-vinyl acetate copolymer 50～70%
Tackifying resin 20～40%
Softening agent 5～15%;
Processing step is as follows:
Join tackifying resin in the reactor and be heated to its melting temperature and keep this temperature, then stir, after the complete melting of tackifying resin, in reactor, add ethylene-vinyl acetate copolymer, after tackifying resin and ethylene-vinyl acetate copolymer mix, in reactor, add softening agent, after each component of basal heat melten gel in the reactor mixes, in reactor, add inorganic particle, after each material in the reactor mixes, stop to stir, namely get the hot melt adhesive based on the magnetic particle induced orientation.
7. the preparation method of described hot melt adhesive based on the magnetic particle induced orientation according to claim 6 is characterized in that described inorganic particle is α-Fe
2O
3, γ-Fe
2O
3, Fe
3O
4, in the cobalt, nickel, cobalt-nickel alloy, iron nickel alloy, alumino nickel any, its particle diameter is 0.1 μ m ~ 2 μ m.
8. according to claim 6 or the preparation method of 7 described hot melt adhesives based on the magnetic particle induced orientation, it is characterized in that in the described ethylene-vinyl acetate copolymer that the mass percent of vinyl acetate is 25～30%.
9. according to claim 6 or the preparation method of 7 described hot melt adhesives based on the magnetic particle induced orientation, it is characterized in that described tackifying resin is Gum Rosin or terpine resin; Described softening agent is paraffin.
10. the preparation method of described hot melt adhesive based on the magnetic particle induced orientation according to claim 8 is characterized in that described tackifying resin is Gum Rosin or terpine resin; Described softening agent is paraffin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210385432.XA CN102898976B (en) | 2012-10-12 | 2012-10-12 | Hot melt adhesive based on revulsive orientation of magnetic particles and preparation method of hot melt adhesive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210385432.XA CN102898976B (en) | 2012-10-12 | 2012-10-12 | Hot melt adhesive based on revulsive orientation of magnetic particles and preparation method of hot melt adhesive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102898976A true CN102898976A (en) | 2013-01-30 |
| CN102898976B CN102898976B (en) | 2015-06-10 |
Family
ID=47571472
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|---|---|---|---|
| CN201210385432.XA Expired - Fee Related CN102898976B (en) | 2012-10-12 | 2012-10-12 | Hot melt adhesive based on revulsive orientation of magnetic particles and preparation method of hot melt adhesive |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634743A (en) * | 2016-12-30 | 2017-05-10 | 沈阳万合胶业股份有限公司 | Adhesive material with information recording function, preparation method and application |
| CN108192529A (en) * | 2017-12-13 | 2018-06-22 | 广州艾科洛克建筑材料技术开发有限公司 | A kind of new type hot-melt adhesive that microwave heating can be used and preparation method thereof |
| CN108192530A (en) * | 2017-12-26 | 2018-06-22 | 上海邦中高分子材料有限公司 | A kind of improvement EVA/Fe3O4The method of magnetic hot melt adhesive interface compatibility |
| WO2019174651A1 (en) * | 2018-03-16 | 2019-09-19 | 刘华 | Magnetic adhesive, magnetically separable and recyclable packaging container, and packaging waste recycling method |
| CN110964471A (en) * | 2019-12-30 | 2020-04-07 | 广州合曼电子科技有限公司 | Magnetism-increasing adhesive and preparation method thereof |
| CN113061407A (en) * | 2021-04-01 | 2021-07-02 | 李君� | EVA composite hot melt adhesive, and preparation method and use method thereof |
| CN114058296A (en) * | 2021-12-21 | 2022-02-18 | 北京工商大学 | Electromagnetic shielding function composite pressure-sensitive adhesive with oriented structure and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634743A (en) * | 2016-12-30 | 2017-05-10 | 沈阳万合胶业股份有限公司 | Adhesive material with information recording function, preparation method and application |
| CN108192529A (en) * | 2017-12-13 | 2018-06-22 | 广州艾科洛克建筑材料技术开发有限公司 | A kind of new type hot-melt adhesive that microwave heating can be used and preparation method thereof |
| CN108192530A (en) * | 2017-12-26 | 2018-06-22 | 上海邦中高分子材料有限公司 | A kind of improvement EVA/Fe3O4The method of magnetic hot melt adhesive interface compatibility |
| WO2019174651A1 (en) * | 2018-03-16 | 2019-09-19 | 刘华 | Magnetic adhesive, magnetically separable and recyclable packaging container, and packaging waste recycling method |
| CN110964471A (en) * | 2019-12-30 | 2020-04-07 | 广州合曼电子科技有限公司 | Magnetism-increasing adhesive and preparation method thereof |
| CN113061407A (en) * | 2021-04-01 | 2021-07-02 | 李君� | EVA composite hot melt adhesive, and preparation method and use method thereof |
| CN113061407B (en) * | 2021-04-01 | 2022-11-01 | 杭州索日智能装备有限公司 | EVA composite hot melt adhesive, and preparation method and use method thereof |
| CN114058296A (en) * | 2021-12-21 | 2022-02-18 | 北京工商大学 | Electromagnetic shielding function composite pressure-sensitive adhesive with oriented structure and preparation method thereof |
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