CN104531002B - A kind of magnetic PUR and its preparation and application - Google Patents
A kind of magnetic PUR and its preparation and application Download PDFInfo
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- CN104531002B CN104531002B CN201510013027.9A CN201510013027A CN104531002B CN 104531002 B CN104531002 B CN 104531002B CN 201510013027 A CN201510013027 A CN 201510013027A CN 104531002 B CN104531002 B CN 104531002B
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Abstract
For the correlation technique that there is no magnetic nanometer to promote hotmelt melts at present, the invention provides a kind of magnetic PUR and its preparation and application, belong to adhesive area.Magnetic PUR raw materials by weight portion is constituted：10 60 parts of thermoplastic polymers, 25 55 parts of tackifiers, 2 20 parts of plasticizer, 3 15 parts of viscosity-controlling agents, 0.1 4.5 parts of antioxidant, 5 30 parts of magnetic ferrites powder.Magnetic PUR is dispersed in the nano magnetic ferrite body powder with magnetic thermal characteristics in PUR, the heat that Nano-Ferrite Particle is produced in alternating magnetic field is with radial quick to extending around, promote neighbouring PUR molecule heated fast, can rapidly be bonded within the several seconds, thus have coating uniform, adhesion strength advantage high.Firing equipment need not be equipped with when using, it is not required that pre- PUR, it is only necessary to small-sized alternating magnetic field generator, it is easy to operate, it is suitable to serialization, automatic high-speed operation.Cured PUR reapposes and is heated in alternating magnetic field and can be separated again easily.
Description
Technical field
The invention belongs to adhesive area, and in particular to a kind of magnetic PUR and its preparation and application.
Background technology
PUR have the advantages that quick solidifying, it is pollution-free, prepare it is convenient, be widely used in mechanical packaging, furniture make,
Shoemaking, automobile, unsewn binding, electronic component and articles for daily use bonding.At present, the PUR for having inserts is accounted for because its is cheap
According to most markets, but because its fusing time is more long, viscosity is higher after melting, therefore wetability is poor, it is more difficult to which coating is uniform,
It is not suitable for the coating bonding of large area, and PUR heat resistance is not high, is only used for technological requirement product not high.Although domestic
Have many on adding research of the filler to PUR performance impact, but research of the major part on filler at present also to rest on
The strengthening action stage of filler, the performance change of property and the glue for thus causing with regard to some fillers is not goed deep into
Extensive research.At present, the correlation technique of hotmelt melts is also promoted without magnetic nanometer both at home and abroad.
Special equipment melting, applying glue, such as hot melt adhesive machine, PUR heating tube, hot melt need to be equipped with when using PUR
Glue rifle etc., inconvenient to use, so as to limit using and promoting for PUR.For dividing for cured hot melt adhesive layer
From there is two kinds of separation methods of heating and solvent dissolution method.Solvent dissolution method can generation environment pollution, and do not permit in many occasions
Perhaps may even not heat and separate, such as civil construction etc..Thus in the market an urgent demand develop low cost, rapid melting,
Coating is uniform, adhesion strength is high and is easily achieved the PUR for again separate.
The content of the invention
The purpose of the present invention is to overcome defect of the prior art, there is provided a kind of magnetic PUR and its preparation and user
Method.Magnetic PUR proposed by the present invention be with polyol process prepare ferrite nanometer particle as filler, with coupling agent to its table
Face is modified, and it is dispersed in PUR, and using magnetic-particle there is magnetothermal effect characteristic to make it in alternation magnetic
Magnetic energy is converted into heat energy in, the heat that Nano-Ferrite Particle is produced promotes hot melt with radial quick to extending around
Glue neighboring molecule thermally equivalent, shortens fusing time, improves adhesion strength.The product is inexpensive, pollution-free, operation is quick, letter
Just, it is coated with uniform, adhesion strength high and be easily achieved and separate again.The preparation and application is simple and convenient, it is easy to implement.
To achieve these goals, one of technical scheme is as follows：
A kind of magnetic PUR, by weight for：Thermoplastic polymer is 10-60 parts, and tackifier is 25-55
Part, plasticizer is 2-20 parts, and viscosity-controlling agent is 3-15 parts, and antioxidant is 0.1-4.5 parts, and nano magnetic ferrite body is 5-30
Part；
Preferable quality number is constituted：Thermoplastic polymer is 25-45 parts, and tackifier is 25-45 parts, and plasticizer is 2-
10 parts, viscosity-controlling agent is 6-14 parts, and antioxidant is 0.3-2.5 parts, and nano magnetic ferrite body is 6-25 parts；
Best quality number is constituted：Thermoplastic polymer is 27-35 parts, and tackifier is 26-40 parts, and plasticizer is 3-
6 parts, viscosity-controlling agent is 9-13 parts, and antioxidant is 0.5-1.8 parts, and nano magnetic ferrite body is 8-20 parts；
Wherein, the thermoplastic polymer is ethylene-vinyl acetate copolymer (EVA), polyamide, polyester tree
Fat, polyurethane resin, acrylic resin, polyvinyl acetate resins, styrene-diene-styrene ternary block polymer
SDS (styrene-butadiene-styrene ternary block copolymer SBS, styrene-isoprene-phenylethene tri-block copolymerization
Thing SIS), polyvinyl alcohol, polyethylene, polyvinyl chloride, ethylene-ethyl acrylate copolymer (EEA), ethylene-acrylic acid copolymer
(EAA), the mixture of one or more in polydiallyl phthalate (DAP)；
The tackifier is in rosin and its derivative, terpenoid resin, Petropols, phenolic resin, coumarone indene resin
The mixture of one or more；
The plasticizer is dioctyl phthalate, dibutyl phthalate, tricresyl phosphate, naphthenic oil, poly-
The mixture of one or more in butadiene；
The viscosity-controlling agent be one kind in paraffin, husky rope synthetic wax, microwax, ceresine, low-molecular polyethylene wax or
Several mixtures；
The antioxidant is 2,6- Butylated Hydroxytoluenes (BHT), antioxidant 1010, double (the double first of the 6- tert-butyl groups of 4,4- sulfydryls
Phenol) (RC), the mixture of one or more in thiodipropionate；
The nano magnetic ferrite body is nickel zinc, MnZn, the cobalt zinc ferrite oxysome magnetic Nano prepared using polyol process
Grain, preferable nano magnetic ferrite body is manganese-zinc ferrite；Ferritic magnetic content is 30-70wt%, ferritic average grain
Footpath is 6nm-80nm.
The two of technical scheme are as follows：
A kind of preparation method of magnetic PUR, comprises the following steps：
1) tackifier, antioxidant, viscosity-controlling agent are put into container by above-mentioned formula consumption, and be heated to 60 DEG C with
On, stir, melt mixture；
2) after step 1) obtained in after mixture is completely melt, then be separately added into the thermoplastic polymer of formula ratio, plasticising
Agent, stirs at 150~180 DEG C；
3) after step 2) obtained in after mixture is completely melt mixing, add the modified magnetic Nano in surface of formula ratio
Ferrite powder, stirs；
Wherein, it is to the method that magnetic Nano ferrite powder surface is modified：Appropriate nano-powder is weighed, silane idol is added
Ultrasonically treated 2 hours of connection agent KH-550, is then vacuum dried and the modified magnetic Nano ferrite powder in surface is obtained；
4) by step 3) obtained in compound stop heating, make its temperature be down to≤130 DEG C after, through 200~300 mesh filter screens
Filtering；
5) by step 4) filtering after compound be placed in extruder, in 100~160 DEG C of extrusion moldings, then through cooling down, cutting
The operations such as grain, drying obtain final product magnetic PUR.
The three of technical scheme are as follows：
A kind of application method of magnetic PUR, may be selected following method 1) or 2)：
1) when magnetic PUR is used to paste, magnetic hot-melt is spread on face to be bonded, plus an alternating magnetic field melts it
After change, two adhesive surfaces are sticked together, after after the solidification of magnetic PUR；
2) when cured magnetic hot melt adhesive layer is separated, magnetic PUR weight is made on adhesive surface plus by an alternating magnetic field
New fusing is realized separating again；
Preferable alternating magnetic field intensity is 5-15kA/m, and alternation heated current is 10-100A, and field frequency is 100-
180kHz。
The present invention compared with prior art, the advantage is that：
1st, it is coated with uniform：Because magnetic Nano ferrite is uniformly distributed in PUR, the Nanoscale Iron oxygen in alternating magnetic field
The heat that body particle is produced promotes PUR neighboring molecule thermally equivalent with radial quick to extending around.Magnetic PUR can
Overcome traditional hot-melt adhesive mode of heating from outward appearance to inner essence, realize that intramolecular is uniformly heated, thus avoid thermograde from producing, so that
Ensure that PUR is heated in all directions identical, be coated with PUR uniform.
2nd, quick-binding：Alternating magnetic field without preheating and heating face to be bonded by directly heat solid melten gel, can be in number
Rapid bonding, is suitable to serialization, automatic high-speed operation, and low cost in second.
3rd, can separate again：The PUR on adherend is such as coated in, can not be bonded because of cooling and solidifying or bond effect is paid no attention to
When thinking, can reappose to be heated in alternating magnetic field and separated again.
4th, adhesive strength is high：Ferrite fillers are added in PUR can reduce shrinkage factor, improve adhesive strength and heat resistance.
5th, it is easy to operate：Hot melt adhesive machine, PUR heating tube, hand-held hot-melting glue rifle and hot melt coating machine need not be equipped with
Deng firing equipment, it is not required that pre- PUR, it is only necessary to which small-sized alternating magnetic field generator can make its rapid fusing.
Brief description of the drawings
Fig. 1 is the transmission electron microscope picture of the manganese-zinc ferrite that the present invention is selected；
Fig. 2 is the hysteresis curve figure of the manganese-zinc ferrite that the present invention is selected.
Specific embodiment
Material therefor of the present invention, in addition to special instruction, is purchased in market.
The preparation method of nickel zinc, MnZn and cobalt zinc ferrite oxysome：It is 4 by mol ratio:1:1 ferric acetyl acetonade, acetylacetone,2,4-pentanedione
Zinc and nickel acetylacetonate or manganese acetylacetonate or acetylacetone cobalt are added in ethylene glycol, are heated in Ar protective atmospheres, 80
~90 DEG C of 10~30min of insulation；170~200 DEG C of 2~5min of insulation are to slowly warm up to again, then are rapidly heated to 255~265 DEG C,
50~90min of backflow, finally naturally cools to room temperature；Absolute ethyl alcohol is added to reaction solution again, black reaction liquid is obtained；By solution
Centrifugation, is precipitated 3~5 times with absolute ethyl alcohol cyclic washing, and finally the black precipitate after washing is vacuum dried, and is obtained
Ni0.5Zn0.5Fe2O4、Mn0.5Zn0.5Fe2O4Or Co0.5Zn0.5Fe2O4Nanometer ferrite powder.
It is to the method that magnetic Nano ferrite powder surface is modified：Appropriate nano powder is weighed, silane coupler KH- is added
550 ultrasonically treated 2 hours, then it is vacuum dried and the modified magnetic Nano ferrite powder in surface is obtained.
Embodiment 1
25 kilograms of EVA, 22.5 kilograms of rosin, 4.5 kilograms of polybutadiene, husky rope are needed when making 65.5 kilograms of magnetic PURs
8 kilograms modified of magnetic manganese-zinc ferrite nano powder of 5 kilograms of synthetic wax, 0.5 kilogram of antioxidant 1010, surface；Described sand
Rope synthetic wax softening point is between 110 DEG C -120 DEG C；Described plasticizer is the divinol of molecular weight 2300.
Rosin, antioxidant 1010, husky rope synthetic wax are put into container by formula consumption, and are heated to more than 60 DEG C,
Stir, melt said mixture；After material is melted completely, EVA, the polybutadiene of formula ratio are separately added into, 150
Stirred at~180 DEG C；After the magnetic manganese-zinc ferrite nanometer for after complete melting mixing, adding the surface of formula ratio modified
Powder, stirs；Mixed melting charge is stopped to heat, its temperature is down to not higher than 130 DEG C, then above-mentioned melting charge is passed through
200 mesh filter screens are filtered；Take the melting charge after filtering to be placed in extruder, in 100~160 DEG C of extrusion moldings, then through cooling down, cutting
The operations such as grain, drying obtain final product magnetic PUR.
Using the magnetic PUR when, is applied and is spread on face to be bonded, plus an alternating magnetic field by make its 1 minute it
Interior rapid fusing, then two adhesive surfaces are sticked together, after after the solidification of magnetic PUR, magnetic field intensity is 8kA/m, and alternation adds
Thermocurrent is 30A, and field frequency is 130kHz.
Such as need again to separate cured hot melt adhesive layer, an alternating magnetic field is added on adhesive surface, you can make magnetic PUR
Refuse is realized separating again, and magnetic field intensity is 10kA/m, and alternation heated current is 35A, and field frequency is 140kHz.
Testing result is shown in Table 1.
Embodiment 2
52 kilograms of EEA, 41.2 kilograms of coumarone indene resin, dibutyl phthalate are needed when making 129 kilograms of magnetic PURs
3.6 kilograms, the modified magnetic nickel-zinc ferrite nano powder 20,000 in 11 kilograms of microwax, 1.2 kilograms of thiodipropionate, surface
Gram；Described microwax softening point is between 60 DEG C -90 DEG C.
By formula consumption coumarone indene resin, thiodipropionate, microwax are put into container, and be heated to 60 DEG C with
On, stir, melt said mixture；After material is melted completely, EEA, the phthalic acid of formula ratio are separately added into
Dibutyl ester, stirs at 150~180 DEG C；After after complete melting mixing, the Magnetic nickel for adding the surface of formula ratio modified
Zn ferrite nano powder, stirs；Mixed melting charge is stopped to heat, its temperature is down to not higher than 130 DEG C, then will
Above-mentioned melting charge is filtered through 300 mesh filter screens；The melting charge after filtering is taken to be placed in extruder, in 100~160 DEG C of extrusion moldings,
Again magnetic PUR is obtained final product through operations such as cooling, pelletizing, drying.
Using the magnetic PUR when, is applied and is spread on face to be bonded, plus an alternating magnetic field by make its 1 minute it
Interior rapid fusing, then two adhesive surfaces are sticked together, after after the solidification of magnetic PUR, magnetic field intensity is 12kA/m, alternation
Heated current is 40A, and field frequency is 160kHz.
Such as need again to separate cured hot melt adhesive layer, an alternating magnetic field is added on adhesive surface, you can make magnetic PUR
Refuse is realized separating again, and magnetic field intensity is 14kA/m, and alternation heated current is 45A, and field frequency is 170kHz.
Testing result is shown in Table 1.
Embodiment 3
26.5 kilograms of EVA, 20.3 kilograms of rosin, dibutyl phthalate 1.9 are needed when making 69.5 kilograms of magnetic PURs
Kilogram, modified 15 kilograms of the magnetic cobalt Zn ferrite nano powder in 5 kilograms of paraffin, 0.8 kilogram of thiodipropionate, surface；Institute
The paraffin softening point stated is between 55 DEG C -85 DEG C.
Rosin, thiodipropionate, paraffin are put into container by formula consumption, and are heated to more than 60 DEG C, stirring is equal
It is even, melt said mixture；After material is melted completely, EVA, the dibutyl phthalate of formula ratio are separately added into,
Stirred at 150~180 DEG C；After after complete melting mixing, the magnetic cobalt Zn ferrite for adding the surface of formula ratio modified
Nano powder, stirs；Mixed melting charge is stopped to heat, its temperature is down to not higher than 130 DEG C, then by above-mentioned melting
Material is filtered through 200 mesh filter screens；The melting charge after filtering is taken to be placed in extruder, in 100~160 DEG C of extrusion moldings, then through cooling down,
The operations such as pelletizing, drying obtain final product magnetic PUR.
Using the magnetic PUR when, is applied and is spread on face to be bonded, plus an alternating magnetic field by make its 1 minute it
Interior rapid fusing, then two adhesive surfaces are sticked together, after after the solidification of magnetic PUR, magnetic field intensity is 5kA/m, and alternation adds
Thermocurrent is 10A, and field frequency is 100kHz.
Such as need again to separate cured hot melt adhesive layer, an alternating magnetic field is added on adhesive surface, you can make magnetic PUR
Refuse is realized separating again, and magnetic field intensity is 12kA/m, and alternation heated current is 40A, and field frequency is 160kHz.
Testing result is shown in Table 1.
Embodiment 4
15.3 kilograms of acrylic resin, 14.1 kilograms of coumarone indene resin, naphthenic oil are needed when making 39.9 kilograms of magnetic PURs
0.8 kilogram, the modified magnetic MnZn iron in 2.7 kilograms of low-molecular polyethylene wax, 0.4 kilogram of 2,6- Butylated Hydroxytoluenes, surface
6.6 kilograms of oxysome nano powder；Described low-molecular polyethylene wax softening point is between 90 DEG C -110 DEG C.
Coumarone indene resin, 2,6- Butylated Hydroxytoluenes, low-molecular polyethylene wax are put into container by formula consumption, and are added
Heat stirs to more than 60 DEG C, melts said mixture；After material is melted completely, poly- the third of formula ratio is separately added into
Olefine resin, naphthenic oil, stir at 150~180 DEG C；After after complete melting mixing, the surface of addition formula ratio is modified
Magnetic manganese-zinc ferrite nano powder, stir；Mixed melting charge is stopped to heat, its temperature is down to not higher than
130 DEG C, then above-mentioned melting charge is placed in extruder through the melting charge that 200 mesh filter screens are filtered to take after filtering, in 100~160 DEG C
Extrusion molding, then obtain final product magnetic PUR through operations such as cooling, pelletizing, drying.
Using the magnetic PUR when, is applied and is spread on face to be bonded, plus an alternating magnetic field by make its 1 minute it
Interior rapid fusing, then two adhesive surfaces are sticked together, after after the solidification of magnetic PUR, magnetic field intensity is 7kA/m, and alternation adds
Thermocurrent is 25A, and field frequency is 120kHz.
Such as need again to separate cured hot melt adhesive layer, an alternating magnetic field is added on adhesive surface, you can make magnetic PUR
Refuse is realized separating again, and magnetic field intensity is 15kA/m, and alternation heated current is 100A, and field frequency is 180kHz.
Testing result is shown in Table 1.
The PUR performance test data of table 1
Embodiment 5
184.5 kilograms of magnetic PURs are made, 20 kilograms of SBS, 20 kilograms of SIS, 20 kilograms of DAP, terpenoid resin 35 is needed
Kilogram, 20g kilograms of hydrogenated rosin, 14 kilograms of dioctyl phthalate, 6 kilograms of dibutyl phthalate, 15 kilograms of ceresine,
30 kilograms modified of magnetic manganese-zinc ferrite nano powder of 4.5 kilograms of 4,4- sulfydryls double (the double cresols of the 6- tert-butyl groups), surface；It is described
Ceresine softening point between 62 DEG C -75 DEG C.
Embodiment 6
45.1 kilograms of magnetic PURs are made, 5 kilograms of polyethylene, 5 kilograms of EAA, 25 kilograms of Petropols, tripotassium phosphate is needed
5 kilograms modified of magnetic manganese-zinc ferrite nano powder of 2 kilograms of phenyl ester, 3 kilograms of paraffin, 0.1 kilogram of antioxidant 1010, surface；
Described paraffin softening point is between 55 DEG C -85 DEG C.
Embodiment 7
Magnetic PUR is made, EVA 27-35 kilogram, 26-40 kilograms of terpenoid resin, dioctyl phthalate 3-6 is needed
Kilogram, the modified magnetic in husky 9-13 kilograms of rope synthetic wax, 0.5-1.8 kilograms of 4,4- sulfydryls double (the double cresols of the 6- tert-butyl groups), surface
8-20 kilograms of property manganese-zinc ferrite nano powder；Described husky rope synthetic wax softening point is between 110 DEG C -120 DEG C.
Embodiment 8
Magnetic PUR is made, 27-35 kilograms of polyamide, 26-40 kilograms of rosin, dibutyl phthalate 3-6 is needed
Kilogram, the modified magnetic nickel-zinc ferrite nanometer in 9-13 kilograms of paraffin, 0.5-1.8 kilograms of 2,6- Butylated Hydroxytoluenes, surface
8-20 kilograms of powder；Described paraffin softening point is between 55 DEG C -85 DEG C.
Embodiment 9
Magnetic PUR is made, 27-35 kilograms of polyester resin, 26-40 kilograms of water-white rosin, 3-6 kilograms of polybutadiene, micro- is needed
8-20 kilograms modified of magnetic cobalt Zn ferrite nano powder of 9-13 kilograms of brilliant wax, 0.5-1.8 kilograms of antioxidant 1010, surface；
Described microwax softening point is between 60 DEG C -90 DEG C；Described plasticizer is the divinol of molecular weight 2300.
Embodiment 10
Make magnetic PUR, need 27-35 kilograms of polyurethane resin, 26-40 kilograms of coumarone indene resin, 3-6 kilograms of naphthenic oil,
The modified magnetic manganese-zinc ferrite nanometer in 9-13 kilograms of low-molecular polyethylene wax, 0.5-1.8 kilograms of thiodipropionate, surface
8-20 kilograms of powder；Described low-molecular polyethylene wax softening point is between 90 DEG C -110 DEG C.
Embodiment 11
Make magnetic PUR, need 27-35 kilograms of acrylic resin, 26-40 kilograms of phenolic resin, 3-6 kilograms of polybutadiene,
The modified magnetic manganese-zinc ferrite nano powder 8- in husky 9-13 kilograms of rope synthetic wax, 0.5-1.8 kilograms of antioxidant 1010, surface
20 kilograms；Described husky rope synthetic wax softening point is between 110 DEG C -120 DEG C；Described plasticizer is low point of molecular weight 2300
Sub- polybutadiene.
Embodiment 12
Magnetic PUR is made, 27-35 kilograms of polyvinyl acetate resins, 26-40 kilograms of Petropols, phosphate trimethylbenzene is needed
The modified magnetic cobalt Zn ferrite nanometer in 3-6 kilograms of ester, 9-13 kilograms of ceresine, 0.5-1.8 kilograms of antioxidant 1010, surface
8-20 kilograms of powder；Described ceresine softening point is between 62 DEG C -75 DEG C.
Embodiment 13
Magnetic PUR is made, SDS 27-35 kilogram, 26-40 kilograms of rosin, 3-6 kilograms of polybutadiene, husky rope synthetic wax is needed
9-13 kilograms, modified 8-20 kilograms of the magnetic manganese-zinc ferrite nano powder in 0.5-1.8 kilograms of antioxidant 1010, surface；It is described
Husky rope synthetic wax softening point between 110 DEG C -120 DEG C；Described plasticizer is the divinol of molecular weight 2300.
Embodiment 14
Magnetic PUR is made, 27-35 kilograms of polyvinyl alcohol, 26-40 kilograms of hydrogenated rosin, 3-6 kilograms of polybutadiene, micro- is needed
8-20 kilograms modified of magnetic manganese-zinc ferrite nano powder of 9-13 kilograms of brilliant wax, BHT 0.5-1.8 kilogram, surface；Described
Microwax softening point is between 60 DEG C -90 DEG C；Described plasticizer is the divinol of molecular weight 2300.
Embodiment 15
Magnetic PUR is made, 27-35 kilograms of polyethylene, 26-40 kilograms of coumarone indene resin, 3-6 kilograms of polybutadiene, sand is needed
8-20 kilograms modified of magnetic nickel-zinc ferrite nano powder of 9-13 kilograms of rope synthetic wax, BHT 0.5-1.8 kilogram, surface；Institute
The husky rope synthetic wax softening point stated is between 110 DEG C -120 DEG C；Described plasticizer is the low molecule polybutadiene of molecular weight 2300
Alkene.
Embodiment 16
Magnetic PUR is made, 27-35 kilograms of polyvinyl chloride, 26-40 kilograms of rosin, dibutyl phthalate 3-6 thousand is needed
Gram, modified 8-20 kilograms of the magnetic manganese-zinc ferrite nano powder in 9-13 kilograms of microwax, RC 0.5-1.8 kilogram, surface；Institute
The microwax softening point stated is between 60 DEG C -90 DEG C.
Embodiment 17
Magnetic PUR is made, EEA 27-35 kilogram, 26-40 kilograms of coumarone indene resin, dioctyl phthalate 3-6 is needed
Kilogram, modified 8-20 kilograms of the magnetic manganese-zinc ferrite nano powder in 9-13 kilograms of microwax, RC 0.5-1.8 kilogram, surface；
Described microwax softening point is between 60 DEG C -90 DEG C.
Embodiment 18
Magnetic PUR is made, EAA 27-35 kilogram, 26-40 kilograms of coumarone indene resin, dioctyl phthalate 3-6 is needed
Kilogram, the modified magnetic manganese-zinc ferrite nano powder in husky 9-13 kilograms of rope synthetic wax, RC 0.5-1.8 kilogram, surface be 10-
20 kilograms；Described husky rope synthetic wax softening point is between 110 DEG C -120 DEG C.
Embodiment 19
Magnetic PUR is made, DAP 27-35 kilogram, 26-40 kilograms of rosin, 3-6 kilograms of dibutyl phthalate, sand is needed
The modified magnetic manganese-zinc ferrite nano powder in 9-13 kilograms of rope synthetic wax, RC 0.5-1.8 kilogram, surface is 10-20 kilograms；
Described husky rope synthetic wax softening point is between 110 DEG C -120 DEG C.
Claims (9)
1. a kind of magnetic PUR, it is characterised in that by weight for：Thermoplastic polymer is 10-60 parts, tackifier
It it is 25-55 parts, plasticizer is 2-20 parts, viscosity-controlling agent is 3-15 parts, and antioxidant is 0.1-4.5 parts, and surface is modified to be received
Rice magnetic ferrites are 5-30 parts；
The nano magnetic ferrite body is nickel zinc, MnZn or the cobalt zinc ferrite oxysome magnetic nanoparticle prepared using polyol process；
The ferritic magnetic content is 30-70wt%, and ferritic average grain diameter is 6nm-80nm.
2. a kind of magnetic PUR according to claim 1, it is characterised in that the thermoplastic polymer is ethyl vinyl acetate
Vinyl ester copolymers, polyamide, polyester resin, polyurethane resin, acrylic resin, polyvinyl acetate resins, benzene second
Alkene-diene-styrene ternary block polymer, polyvinyl alcohol, polyethylene, polyvinyl chloride, ethylene-ethylacrylate copolymerization
The mixture of one or more in thing, ethylene-acrylic acid copolymer, polydiallyl phthalate.
3. a kind of magnetic PUR according to claim 1, it is characterised in that the tackifier be rosin and its derivative,
The mixture of one or more in terpenoid resin, Petropols, phenolic resin, coumarone indene resin.
4. a kind of magnetic PUR according to claim 1, it is characterised in that the plasticizer is that phthalic acid two is pungent
The mixture of one or more in ester, dibutyl phthalate, tricresyl phosphate, naphthenic oil, polybutadiene.
5. a kind of magnetic PUR according to claim 1, it is characterised in that the viscosity-controlling agent is paraffin, Sha Suohe
Into the mixture of one or more in wax, microwax, ceresine, low-molecular polyethylene wax.
6. a kind of magnetic PUR according to claim 1, it is characterised in that the antioxidant is 2, the 6- tert-butyl groups to first
The mixture of one or more in phenol, antioxidant 1010,4,4- sulfydryls double (the double cresols of the 6- tert-butyl groups), thiodipropionate.
7. the preparation method of a kind of magnetic PUR according to claim 1, it is characterised in that comprise the following steps：
1) tackifier, antioxidant, viscosity-controlling agent are put into container, and are heated to more than 60 DEG C, stirred, make mixing
Thing melts；
2) after step 1) obtained in after mixture is completely melt, then thermoplastic polymer, plasticizer are separately added into, 150~180
Stirred at DEG C；
3) after step 2) obtained in after mixture is completely melt mixing, add the modified magnetic Nano ferrite powder in surface, stir
Mix uniform；
4) by step 3) obtained in compound stop heating, make its temperature be down to≤130 DEG C after, through 200~300 mesh filter screen mistakes
Filter；
5) by step 4) filtering after compound be placed in extruder, in 100~160 DEG C of extrusion moldings, then through cooling, pelletizing,
Baking operation obtains final product magnetic PUR.
8. the application method of a kind of magnetic PUR according to claim 1, it is characterised in that following method 1 may be selected) or
2)：
1) when magnetic PUR be used for paste when, magnetic hot-melt is spread on face to be bonded, plus an alternating magnetic field make its melt after,
Two adhesive surfaces are sticked together, after after the solidification of magnetic PUR；
2) when cured magnetic hot melt adhesive layer is separated, magnetic PUR is made to melt again on adhesive surface plus by an alternating magnetic field
Change and realize separating again.
9. the application method of a kind of magnetic PUR according to claim 8, it is characterised in that the alternating magnetic field intensity is
5-15kA/m, alternation heated current is 10-100A, and field frequency is 100-180kHz.
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| CN104531002B true CN104531002B (en) | 2017-06-06 |
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| 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 |
| CN113416504A (en) * | 2021-08-13 | 2021-09-21 | 广州市方佳崇医疗科技有限公司 | Medical hot-melt adhesive and preparation method thereof |
| CN115011292A (en) * | 2021-08-30 | 2022-09-06 | 烟台德邦科技股份有限公司 | Epoxy resin bonding material capable of being cured by magnetic field and preparation method thereof |
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