CN107254022B - A kind of bloom PTFE Antidrip agent and preparation method thereof - Google Patents
A kind of bloom PTFE Antidrip agent and preparation method thereof Download PDFInfo
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- CN107254022B CN107254022B CN201710487480.2A CN201710487480A CN107254022B CN 107254022 B CN107254022 B CN 107254022B CN 201710487480 A CN201710487480 A CN 201710487480A CN 107254022 B CN107254022 B CN 107254022B
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F285/00—Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers
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- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
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- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
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- C08F259/00—Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group C08F14/00
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Abstract
The present invention relates to a kind of bloom PTFE Antidrip agents and preparation method thereof.It includes the following steps: that the monomer solution A emulsified on a small quantity is 1. added in ptfe emulsion and places it in radiation treatment under high-energy ray, is grafted a small amount of monomer in PTFE particle surface.2. under anaerobic, cause monomer B using initiator carries out polymerization reaction in processed PTFE emulsion, and crosslinking agent is added in the later period, being formed by core, polymer of polytetrafluoroethylparticle particle is the core-shell structure copolymer nano PTFE compound particle of shell.3. modified ptfe lotion is filtered and by filtrate spray drying treatment, the nano PTFE Antidrip agent of high optical property is obtained.Product of the invention is without can be good at being scattered in thermoplastic resin and compatibility is good, translucency, the glossiness etc. for not influencing matrix resin are dispersed in the engineering plastics such as PA, PC as Antidrip agent under the conditions of adding any dispersing agent or compatilizer.
Description
Technical field
The present invention relates to a kind of bloom PTFE Antidrip agents and preparation method thereof.
Background technique
Antidrip agent product is grown up from plastic flame and modified desired continuous improvement, and early application chlorination is poly-
Ethylene, the products such as silicon rubber, but there is the problems such as environmentally friendly, operability and migration, gradually replaced by high molecular weight PTFE,
Mainstream as market.It is that at fine principle, PTFE forms network knot in extrusion process using high molecular weight amorphous state PTFE
Structure, enhances the melt elasticity intensity of polymer to achieve the effect that anti-dripping melt, theoretically various forms of high molecular weight amorphous
State PTFE can play a role, crystallize the PTFE of PTFE and high temperature sintering due to its insoluble infusibility at the effect of fibre and
It cannot be used for anti-dripping melt, low molecular weight PTFE and polytetrafluoroethylwax wax can not be used for anti-dripping melt at fine effect.
There are mainly three types of kenels for the polytetrafluoroethylene (PTFE) used as Antidrip agent: pure powder type, emulsion-type, cladded type
's.
It is antidrip that there is the pure polyflon of fibre-forming performance to be used as by the disclosure such as USP4463130,4786686 for addition
It falls in agent addition synthetic resin PC/ABS alloy and improves flame retardant effect.But the defect of pure polytetrafluoroethylene (PTFE) is addition operation not side
Just, there are surface defect, mechanical strength decline in difficulties in dispersion, when molding.Modified Teflon is studied as Antidrip agent simultaneously
Have as follows:
(1) physical blending: the rigid polymer particle that CN02805583 describes fine grain wraps up partial size as interleaving agent
Thicker pure polyflon, by simply mixing and the method for mixture extruding pelletization improves pure polytetrafluoroethyl-ne
The dispersion performance of alkene.But the ability of fibre-forming performance and solution surface defect is limited.
(2) with other lotion co-agglomerations: USP4810739,5061745 disclose aqueous dispersions of polytetrafluoroethylhaving and AS
Or co-agglomeration modified Teflon and part solves the problems, such as addition and surface defect after the mixing of ABS resin lotion.
(3) shell structure emulsion polymerization: CN95192785, which is disclosed, obtains surface package using nucleocapsid method emulsion polymerization
It flows freely PTFE particle and is used as Antidrip agent, partially solve the problems, such as addition and surface defect.
(4) polytetrafluoroethylene aqueous dispersion: CN98106922, which is disclosed, increases the addition of vaccum exhaust outlet method in extruder
Polytetrafluoroethylene aqueous dispersion obtains the biggish fine fibre of draw ratio and localized chiasma reticular structure, partially solve addition and
Still fibre forming property effect is unstable for surface defect problem, while moisture has adverse effect to the resins mechanical property such as PET, PC, PA.
The domestic prior art is immature, and process is complicated and product quality is bad, and the transparency reduces and there is scratch on surface.
It is external mainly with U.S. 3M, Daikin, based on South Korea's Chinese is received, nanoscale PTFE is mainly made in they using suspension polymerisation
Antidrip agent, product quality is preferable, but process flow is complicated.
Summary of the invention
To solve the above-mentioned problems, it is an object of that present invention to provide a kind of bloom PTFE Antidrip agents and preparation method thereof.
The purpose of the present invention can be achieved through the following technical solutions:
The preparation method of bloom PTFE Antidrip agent provided by the invention, includes the following steps:
(1) it will be added in ptfe emulsion and stir evenly after monomer A emulsification, then its radiation treatment is irradiated
Processed lotion；
Wherein, the monomer A is one or two kinds of in styrene and acrylonitrile；Polytetrafluoro in the ptfe emulsion
Ethylene contents are 5-60wt%；The partial size of the ptfe emulsion particle is 0.1-0.5 μm；
By radiation exposure, it is grafted a small amount of monomer in PTFE particle surface, improves the dispersion stabilization of PTFE；In order to avoid
The cracking of PTFE, using lower absorbed dose.Processing is modified to PTFE particle surface using irradiation technique, makes it more
Stablize, to be unlikely to agglomeration traits occur during the further cladding in later period, keeps last PTFE particle still
In nano-scale.
(2) under anaerobic, initiator is added to dissolving, first in the lotion that the radiation treatment obtained in step (1) is crossed
Monomer B is added dropwise, then crosslinking agent graft reaction is added dropwise and obtains the lotion of the Antidrip agent containing nano PTFE；Wherein, the monomer B is benzene
It is one or two kinds of in ethylene and acrylonitrile；The oxygen free condition can be realized by this field conventional technology, such as can
Inert gas is passed through material, oxygen therein and other impurities are discharged.The inert gas, which refers to, to be occurred with material
The gas of reaction is not limited to conventionally referred rare gas, such as can be nitrogen.In a better embodiment of the invention
In, the oxygen free condition is realized using nitrogen 30min is passed through.
(3) lotion of the Antidrip agent containing nano PTFE obtained in step (2) is filtered, by filtrate spray drying treatment,
Obtain the nano PTFE Antidrip agent of high optical property.Filtering, spray drying process and the condition can be the side of this field routine
Method and condition.
Wherein, in step (1), the weight of the monomer A is the 0.5-10wt% of polytetrafluoroethylene (PTFE).Preferably 1~
3wt%, above-mentioned percentage are the percentage of PTFE weight in monomer A total weight and lotion.
Wherein, in step (1), the radiation source of the radiation treatment is electron beam or cobalt source, absorbed dose 5-
100Gy, preferably 5~10Gy.Place is modified to PTFE particle surface using high-energy ray such as electron accelerator or Υ ray
Reason, but the too high excessive fragmentation for having caused PTFE strand of absorbed dose.
Wherein, in step (1), the emulsifier of monomer A emulsification is anionic surfactant and/or non-ionic
Surfactant.Preferably one of allyl alcohol ethers, fatty alcohol polyethenoxy ether class and sulfonate surfactant
Or it is a variety of.Since styrene or acrylonitrile are oil-soluble monomers, directly addition easily layering in water is emulsified using emulsifier
Monomer can be made preferably to be scattered in PTFE emulsion.
Wherein, in step (1), polytetrafluoroethylene content is 20~30%wt in the ptfe emulsion.Preparation is high
The nanoparticle of light, PTFE particle diameter original first is the smaller the better, and secondly solid content is too high easily causes subsequent polymerisation reaction
Shi Fasheng reunites.
Wherein, in step (2), the monomer B dosage is 1~20wt% of polytetrafluoroethylene (PTFE).Above-mentioned percentage is monomer B
The percentage of PTFE weight in total amount and lotion.Amount of monomer is very little, and not exclusively, modified effect is poor for PTFE particle cladding；Amount of monomer
Excessively, system demulsification agglomeration can be caused.
Wherein, in step (2), the initiator is water soluble starter ammonium persulfate, potassium peroxydisulfate, two NSC 18620 of azo
Ammonium persulfate/sulphur of hydrochloride and/or oil-soluble initiator, preferably ammonium persulfate, potassium peroxydisulfate and redox system
It is sour ferrous；The dosage of the initiator accounts for the 0.5-5 ‰ of monomer B dosage.Preferably account for 1 ‰~the 2 ‰ of monomer B dosage.Draw
The amount for sending out agent is very little, and the required reaction time is long；Amount of initiator is too many, then reflecting too can acutely cause to gather cruelly makes system demulsification knot
Block.
Wherein, in step (2), the crosslinking agent is Triallyl isocyanurate, divinylbenzene；The crosslinking agent is single
The 0.5-20wt% of body B weight, is preferably in a proportion of 5~10wt%.Crosslinking action is to make PTFE nanometers of core-shell structure copolymer that be formed
Particle is slightly cross-linked, avoids bonding of agglomerating in drying process, and particle after drying is caused to become larger.
Wherein, in step (2), the graft reaction temperature is 40-85 DEG C, and preferably 50~65 DEG C, be more preferably 60 ± 2
℃；Time is 3-10h, preferably 4~6h；Stirring rate is 100~500r/min, preferably 150~300r/min.Temperature
Degree must can just cause polymerization reaction more than decomposition of initiator temperature, and temperature is excessively high, will cause reaction and be acutely easy demulsification；When
Between too short monomer reaction it is incomplete, the time is also not easy too long；Suitable stirring rate is in order to make the temperature and monomer of whole system
Even concentration.
Bloom PTFE Antidrip agent made from above-mentioned preparation method.
Compared with prior art, the present invention having the following advantages that and effect:
1, the Antidrip agent of PTFE core-shell structure has related patents, and existing patent is essentially all to be suspended using transfer in situ
Polymerization technique coats one layer of polymeric in PTFE particle surface, and this method involves while the cream of affine PTFE and thermoplastic resin
The adjusting back and forth of the extent of reaction and reaction condition of agent selection and discontinuous reaction process, control is bad will to will appear cladding
Unevenly, the problems such as particle is easily settled；And we are then first to coat a layers of polymer in PTFE particle surface using irradiation technique
Object keeps PTFE particle more stable in lotion, can to avoid during subsequent cladding occur reunite, sedimentation situations such as, from
And modified particle is made to be still nano-scale.
2, nanoscale PTFE Antidrip agent preparation process provided by the invention is simple, relates generally to two processes, i.e., first
Radiation treatment after a small amount of monomer is added in lotion, then carries out coating reaction.
3, a kind of modified Teflon micropowder material produced by the present invention, without adding dispersion emulsifier or compatilizer
Under the conditions of, it can be good at being scattered in thermoplastic resin and compatibility be good, as Antidrip agent for engineering plastics such as PA, PC
Translucency, the glossiness etc. of matrix resin are not influenced in material.The fields such as gliding mass system are of great significance as special additive.
Antidrip agent provided by the invention have high photosensitiveness, general Antidrip agent bad dispersibility, influence resin surface glossiness and thoroughly
Photosensitiveness
4, for the present invention by grafting method in PTFE nanoparticle surface coated polymer, being formed has nucleocapsid structure
PTFE nanocomposite, technological operation is simply controllable, does not use synthesis technology, has abandoned the remnants of monomer and emulsifier, produces
Product granularity is controllable, and the influence to matrix resin is smaller, at low cost.
Detailed description of the invention
Fig. 1 is the SEM figure of modified ptfe particle prepared by embodiment 1.
Fig. 2 is the SEM figure of modified ptfe particle prepared by embodiment 3.
Fig. 3 is the SEM figure of modified ptfe particle prepared by embodiment 4.
Fig. 4 is the SEM figure of modified ptfe particle prepared by comparative example 1
Fig. 5 is the SEM figure of modified ptfe particle prepared by comparative example 2
Fig. 6 is that modified ptfe particle prepared by embodiment 1 is scattered in the figure of the SEM in polycarbonate.
Fig. 7 is that modified ptfe particle prepared by embodiment 3 is scattered in the figure of the SEM in polycarbonate.
Fig. 8 is that modified ptfe particle prepared by comparative example 1 is scattered in the figure of the SEM in polycarbonate.
Fig. 9 is that modified ptfe particle prepared by comparative example 2 is scattered in the figure of the SEM in polycarbonate.
Specific embodiment
The present invention is further illustrated below in conjunction with specific example.
In following embodiments, the partial size of ptfe emulsion particle is 0.1~0.5 μm.
Scanning electron microscope (SEM): using the JSM-6360LV type scanning electron microscope of JEOL company, Japan.
Embodiment 1
(1) ptfe emulsion that commercially available polytetrafluoroethylene content is 60wt%, partial size is 0.1-0.5um is weighed
100g, while pouring into ptfe emulsion and stirring after weighing the styrene monomer 30mg dodecyl sodium sulfate emulsification of 6g
It mixes uniformly, then places it in radiation treatment in gamma-ray source, absorbed dose 100Gy.
(2) into the good PTFE emulsion of (1) radiation treatment be added initiator potassium persulfate 60mg, stir to dissolve in
In PTFE emulsion, 85 DEG C are begun heat to after logical nitrogen 30min, starts that styrene monomer is slowly added dropwise after 10min, styrene
Amount is 12g, and 2.4g cross-linker divinylbenzene is slowly added dropwise after styrene monomer drips.Under anaerobic, stirring speed
Rate is 400-500r/min, carries out graft reaction 10h, obtains modified ptfe product；
(3) modified ptfe product is filtered, and filtrate is spray-dried, obtain bloom PTFE Antidrip agent.
Embodiment 2
(1) being diluted to commercially available polytetrafluoroethylene content is 60wt%, partial size is 0.1-0.5um PTFE emulsion
100g is measured after 5wt%, while weighing the styrene monomer of 25mg, with the millesimal sodium dodecyl sulfate aqueous solution of 25mg
It pours into ptfe emulsion and stirs evenly after emulsification, then place it in radiation treatment in gamma-ray source, absorbed dose
For 5Gy.
(2) the millesimal ammonium persulfate aqueous solution of 25mg is added into the good PTFE emulsion of (1) radiation treatment, stirring makes
It is dissolved in PTFE emulsion, begins heat to 40 DEG C after logical nitrogen 30min, starts that styrene monomer is slowly added dropwise after 10min
The millesimal cross-linker divinylbenzene solution of 12.5mg is slowly added dropwise in 50mg after monomer dropping is complete.Under anaerobic,
Stirring rate is 100~150r/min, carries out graft reaction 3h, obtains modified ptfe product；
(3) modified ptfe product is filtered, and filtrate is spray-dried, obtain bloom PTFE Antidrip agent.
Embodiment 3
(1) being diluted to commercially available polytetrafluoroethylene content is 60wt%, partial size is 0.1-0.5um PTFE emulsion
100g is measured after 40wt%, while weighing the acrylonitrile monemer of 0.4g, and polytetrafluoroethylene (PTFE) cream is poured into after being emulsified with 1mgOSP1380
It in liquid and stirs evenly, then places it in radiation treatment in gamma-ray source, absorbed dose 50Gy.
(2) into the good PTFE emulsion of (1) radiation treatment be added initiator ammonium persulfate 4mg, stir to dissolve in
In PTFE emulsion, 50 DEG C are begun heat to after logical nitrogen 30min, starts that acrylonitrile monemer 4g is slowly added dropwise after 10min, to monomer
40mg crosslinking agent Triallyl isocyanurate is slowly added dropwise after dripping.Under anaerobic, stirring rate be 300~
400r/min carries out graft reaction 4h, obtains modified ptfe product；
(3) modified ptfe product is filtered, and filtrate is spray-dried, obtain bloom PTFE Antidrip agent.
Embodiment 4
1) being diluted to commercially available polytetrafluoroethylene content is 60wt%, partial size is 0.1-0.5um PTFE emulsion
The acrylonitrile monemer for measuring 100g after 30wt%, while weighing 0.9g pours into polytetrafluoro after being emulsified with 3mg dodecyl sodium sulfate
It in vac emulsion and stirs evenly, then places it in radiation treatment in gamma-ray source, absorbed dose 30Gy.
(2) into the good PTFE emulsion of (1) radiation treatment be added initiator potassium persulfate 9mg, stir to dissolve in
In PTFE emulsion, 65 DEG C are begun heat to after logical nitrogen 30min, starts that acrylonitrile monemer is slowly added dropwise after 10min to be 4.5g, to
0.45g cross-linker divinylbenzene is slowly added dropwise in styrene monomer after dripping.Under anaerobic, stirring rate 150-
200r/min carries out graft reaction 6h, obtains modified ptfe product；
(3) modified ptfe product is filtered, and filtrate is spray-dried, obtain bloom PTFE Antidrip agent.
Embodiment 5
(1) being diluted to commercially available polytetrafluoroethylene content is 60wt%, partial size is 0.1-0.5um PTFE emulsion
100g is measured after 20wt%, while weighing the styrene and acrylonitrile mix monomer (styrene, 0.7g of 1g；Acrylonitrile, 0.3g),
It is poured into ptfe emulsion and is stirred evenly with after the emulsification of 3mg dodecyl sodium sulfate, then place it in gamma-ray source
Middle radiation treatment, absorbed dose 10Gy.
(2) into the good PTFE emulsion of (1) radiation treatment be added initiator ammonium persulfate 3mg, stir to dissolve in
In PTFE emulsion, 65 DEG C are begun heat to after logical nitrogen 30min, starts that styrene and acrylonitrile mixing is slowly added dropwise after 10min
Monomer 4g, the amount of styrene are 2.8g, and the amount of acrylonitrile is 1.2g, and 2mg crosslinking agent is slowly added dropwise after monomer dropping to be mixed is complete
Triallyl isocyanurate.Under anaerobic, stirring rate is 100~150r/min, carries out graft reaction 4h, obtains modification
PTFE product；
(3) modified ptfe product is filtered, and filtrate is spray-dried, obtain bloom PTFE Antidrip agent.
Comparative example 1
(1) being diluted to commercially available polytetrafluoroethylene content is 60wt%, partial size is 0.1-0.5um PTFE emulsion
The styrene for measuring 100g after 30wt%, while measuring 2gl is poured into ptfe emulsion after being emulsified with OP-10 and is stirred equal
It is even, then place it in radiation treatment in gamma-ray source.Absorbed dose is 100Gy.
(2) initiator potassium persulfate 10mg is added into the PTFE emulsion of (1) radiation treatment, stirs to dissolve in PTFE
In lotion, 60 DEG C are begun heat to after logical nitrogen 30min, starts that styrene monomer is slowly added dropwise after 10min, the amount of monomer is
0.5gl cross-linker divinylbenzene is slowly added dropwise in 20g after monomer dropping is complete.Under anaerobic, stirring rate be 100~
150r/min carries out graft reaction 4h, obtains modified ptfe product；
(3) modified ptfe product is filtered, and filtrate is spray-dried, obtain bloom PTFE Antidrip agent.
In the comparative example, since the amount of monomer styrene is more than 20% (wt) of PTFE content, the amount of monomer is excessively easily made
At reunion, and it cannot be coated on PTFE emulsion particle surface well.
Comparative example 2
(1) being diluted to commercially available polytetrafluoroethylene content is 60wt%, partial size is 0.1-0.5um PTFE emulsion
The acrylonitrile for measuring 100g after 20wt%, while measuring 1g is poured into ptfe emulsion and is stirred after being emulsified with OSP1380
Uniformly, then radiation treatment in gamma-ray source is placed it in.Absorbed dose is 50Gy.
(2) initiator ammonium persulfate 8mg is added into the PTFE emulsion of (1) radiation treatment, stirs to dissolve in PTFE
In lotion, 65 DEG C are begun heat to after logical nitrogen 30min, starts that acrylonitrile monemer is slowly added dropwise after 10min, the amount of monomer is
0.4g cross-linker divinylbenzene is slowly added dropwise in 4g after monomer dropping is complete.Under anaerobic, stirring rate be 100~
150r/min carries out graft reaction 1h, obtains modified ptfe product；
(3) modified ptfe product is filtered, and filtrate is spray-dried, obtain bloom PTFE Antidrip agent.
This comparative example is since the reaction time is shorter, only 1h.Modified Teflon modified material covered effect obtained
It is poor, the not big improvement of dispersibility in the resins such as PC.
Effect example 1
Electronic Speculum test is scanned to bloom Antidrip agent material obtained by 1,3,4 comparative example 1~2 of embodiment.
It can be seen that bloom PTFE Antidrip agent outer layer made from embodiment 1,3,4 has obviously coated a strata as Fig. 1,2,3
Object is closed, wherein embodiment 1 (Fig. 1) cladding is obvious, there is larger improvement to dispersibility of the PTFE particle in the engineering plastics such as PC, but
A large amount of PTFE particles are covered by causes modified particle larger together, and modified effect is obviously poor compared with embodiment 3,4,；Comparison
Since monomer concentration is excessively high in example 1, causes PTFE emulsion to be demulsified in the course of the polymerization process and form one by polymer wrapped, such as scheme
4；Comparative example 2 causes covering amount on PTFE particle less since the reaction time is short, and modification is unobvious.
Effect example 2
Mixer is warming up to 275 DEG C.99.5gPC rouge is weighed, 0.5g (0.5%) modified ptfe sample is weighed.It opens close
Mill stirring, PC resin is added in mixer, after melting completely, is slowly added to PTFE.5min is stirred after adding, and is taken out
Mixed resin observes its dispersibility.The modified ptfe particle of embodiment 1,3 has dispersibility well in PC.But implement
Example 1 is Fig. 6, since particle is larger, is had a certain impact light transmittance tool to which mist spot occurs in surface, and embodiment 3 is that Fig. 7 changes
Property uniform particle, not only dispersibility preferably and also the fogless spot in surface.The modified ptfe particle of comparative example 1 has many groups in resin
Poly- little particle；The modified ptfe particle of comparative example 2 has preferable dispersibility in PC, but also has obvious mist spot.
Fig. 6,7,8,9 are added in polycarbonate for modified ptfe sample made from embodiment 1,2 and comparative example 1,2 and are blended
SEM figure after tabletting, can find out that modified ptfe particle made from embodiment 1,2 does not have interface in PC from SEM figure, have very
Good dispersibility.And the modified ptfe particle of comparative example 1 is distributed in PC resin with small particles form, has serious group
Poly- phenomenon；The modified particle of comparative example 2 has preferable dispersibility in PC, but also has apparent interface to occur.
Effect example 3
By UL94 flame-retardant test criteria's sample preparation after modified ptfe particle made from embodiment 3 and comparative example 2 is blended with PC,
Test result is as follows table.The result shows that modified ptfe particle made from embodiment 1 has good flame-retardant anti-dropping, rank
For UL94V-0；Modified ptfe particle flame-retardant anti-dropping made from comparative example 1 is general, rank UL94V-1.
The above is presently preferred embodiments of the present invention, but the present invention should not be limited to disclosed in the embodiment
Content.So all do not depart from the lower equivalent or modification completed of spirit disclosed in this invention, the model that the present invention protects is both fallen within
It encloses.
Claims (9)
1. a kind of preparation method of bloom PTFE Antidrip agent, which is characterized in that it includes the following steps:
(1) it will be added in ptfe emulsion and stir evenly after monomer A emulsification, then its radiation treatment is obtained into radiation treatment
The lotion crossed；
The monomer A is one or two kinds of in styrene and acrylonitrile；Polytetrafluoroethylene content in the ptfe emulsion
For 5-60wt%；The partial size of the ptfe emulsion particle is 0.1-0.5 μm；
The radiation source of the radiation treatment is electron beam or cobalt source, absorbed dose 5-100Gy；
(2) under anaerobic, initiator is added to dissolving, first slowly in the lotion that the radiation treatment obtained in step (1) is crossed
Monomer B is added dropwise, then crosslinking agent graft reaction is added dropwise and obtains the lotion of the Antidrip agent containing nano PTFE；The monomer B is styrene
With one or two in acrylonitrile；
(3) lotion of the Antidrip agent containing nano PTFE obtained in step (2) is filtered, filtrate spray drying treatment obtains high
The nano PTFE Antidrip agent of optical property.
2. preparation method as described in claim 1, which is characterized in that in step (1), the weight of the monomer A is polytetrafluoro
The 0.5-10wt% of ethylene.
3. preparation method as described in claim 1, which is characterized in that in step (1), the emulsifier of the monomer A emulsification is
Anionic surfactant and/or nonionic surface active agent, dosage are the 1-5 ‰ of monomer A.
4. preparation method as described in claim 1, which is characterized in that in step (1), poly- four in the ptfe emulsion
Vinyl fluoride content is 20~30%wt.
5. preparation method as described in claim 1, which is characterized in that in step (2), the monomer B dosage is polytetrafluoroethyl-ne
1~20wt% of alkene.
6. preparation method as described in claim 1, which is characterized in that in step (2), the initiator is water soluble starter
Ammonium persulfate, potassium peroxydisulfate, azo-bis-isobutyrate hydrochloride and/or oil-soluble initiator, the dosage of the initiator account for monomer B
The 0.5-5 ‰ of dosage.
7. preparation method as described in claim 1, which is characterized in that in step (2), the crosslinking agent is triallyl isocyanide
Urea acid esters, divinylbenzene；The amount of the crosslinking agent is the 0.5-20wt% of monomer B weight.
8. preparation method as described in claim 1, which is characterized in that in step (2), the graft reaction temperature is 40-85
DEG C, time 3-10h, stirring rate is 100~500r/min.
9. bloom PTFE Antidrip agent made from a kind of preparation method as described in any one of claims 1 to 8.
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Denomination of invention: High-gloss PTFE (polytetrafluoroethylene) anti-drop agent and preparation method thereof Effective date of registration: 20200521 Granted publication date: 20190917 Pledgee: Chizhou Jiuhua Rural Commercial Bank Co., Ltd. high tech Zone sub branch Pledgor: ANHUI SHENJIA POLYMER TECHNOLOGY Co.,Ltd. Registration number: Y2020980002379 |