CN109957247A - A kind of wave absorbing patch and its preparation method and application - Google Patents
A kind of wave absorbing patch and its preparation method and application Download PDFInfo
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- CN109957247A CN109957247A CN201711422827.1A CN201711422827A CN109957247A CN 109957247 A CN109957247 A CN 109957247A CN 201711422827 A CN201711422827 A CN 201711422827A CN 109957247 A CN109957247 A CN 109957247A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0856—Iron
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
Abstract
The present invention provides a kind of wave absorbing patch and preparation method thereof, it include: according to parts by weight, to weigh 30~45 parts of silicon rubber, 0.5~2 part of silane coupling agent, 0.5~1 part of anti-aging agent, 2~5 parts of paraffin oil, 37~55 parts of absorbent, 1~10 part of white carbon black, 0.1~0.5 part of stearic acid, 0.3~1 part of vulcanizing agent, 2~8 parts of crosslinking agent respectively；Absorbent, white carbon black, anti-aging agent and silane coupling agent are uniformly mixed, the first mixture is obtained；Silicon rubber, paraffin oil, stearic acid are added into the first mixture, and is uniformly mixed and obtains the second mixture；Vulcanizing agent, crosslinking agent are added into the second mixture, and is kneaded, rubber compound is obtained；By mould heat pressure rubber compound, wave absorbing patch is made.Wave absorbing patch provided by the invention has preferable heat resistance and ageing-resistant performance, and long-term electromagnetic protection can be provided in interior of mobile phone, not will cause because of the problems such as ageing properties decline under high temperature.
Description
Technical field
The present invention relates to a kind of patches, more particularly, to a kind of wave absorbing patch and its preparation method and application.
Background technique
With the development of modernization science and technology, at necessity for people's lives, they give people for various electronics, electrical equipment
Life brings convenience, but at the same time, since these equipment, such as the highest mobile phone of frequency of use can generate many
Electromagnetic radiation leads to the deterioration of our living environments, it has also become the principal element of daily electromagnetic pollution.It is arranged using effective protection
It applies, prevents electromagnetic radiation from having great importance.
Composite wave-suction material disclosed in the prior art, using acetylene carbon black powder, graphite composite powder, iron sial powder, iron
Nickel powder body, zinc cobalt ferrites powder are wave absorbing agent, and matrix is liquid resin.But manufactured product mechanical property is poor.
Summary of the invention
In order to solve the problems in the existing technology, the present invention provides a kind of wave absorbing patch and preparation method thereof.
According to an aspect of the invention, there is provided a kind of preparation method of wave absorbing patch, comprising: according to parts by weight,
30~45 parts of silicon rubber, 0.5~2 part of silane coupling agent, 0.5~1 part of anti-aging agent, 2~5 parts of paraffin oil, absorbent are weighed respectively
37~55 parts, 1~10 part of white carbon black, 0.1~0.5 part of stearic acid, 0.3~1 part of vulcanizing agent, 2~8 parts of crosslinking agent；By the suction
It receives agent, the white carbon black, the anti-aging agent and the silane coupling agent to be uniformly mixed, obtains the first mixture；To described first
The silicon rubber, the paraffin oil, the stearic acid are added in mixture, and is uniformly mixed and obtains the second mixture；To described
Vulcanizing agent, the crosslinking agent are added in second mixture, and is kneaded, rubber compound is obtained；And by described in mould heat pressure
Wave absorbing patch is made in rubber compound.
In the above preparation method, according to parts by weight, the absorbent include 32~45 parts the first absorbent and 5~
10 parts of the second absorbent, wherein first absorbent is the partial size by ball milling in the range of 0.05-2 microns
Flaky carbonyl iron powder, second absorbent are spherical carbonyl iron dust of the partial size in the range of 0.5-10 microns.
In the above preparation method, the absorbent, the white carbon black, the anti-aging agent and the silane coupling agent are mixed
It closes the step of uniformly obtaining the first mixture to specifically include: be added in the high-speed mixer for being 700-900 revs/min to revolving speed
First absorbent, second absorbent, the white carbon black, the anti-aging agent and the silane coupling agent, and stir 60-
90 minutes, obtain first mixture.
In the above preparation method, the silicon rubber, the paraffin oil, the tristearin is added in the first mixture of Xiang Suoshu
Acid, and be uniformly mixed the step of obtaining the second mixture and specifically include: by first mixture, the silicon rubber, the stone
Wax oil, the stearic acid are added in mixer, and the mixer controls 80-100 degrees Celsius of melting temperature, mix 30~60 minutes
Afterwards, the second mixture is obtained.
In the above preparation method, vulcanizing agent, the crosslinking agent are added in the second mixture of Xiang Suoshu, and is kneaded,
The step of obtaining rubber compound specifically includes: second mixture, the vulcanizing agent, the crosslinking agent be added in open mill,
Powder to be eaten finishes, and progress is thin 5-6 times logical, beats triangle bag 5-10 times, clot 4-6 times obtains the rubber compound.
In the above preparation method, by rubber compound described in mould heat pressure, the step of wave absorbing patch is made, is specifically included: will
The rubber compound is added in the mold of vulcanizing press, and by the rubber compound compression moulding, the wave absorbing patch is made,
In, the operation temperature of the vulcanizing press is at 160-180 degrees Celsius.
In the above preparation method, the silicon rubber is selected from methyl vinyl silicone rubber, methyl silicone rubber, methyl ethylene
One of phenyl siloxane rubber or a variety of combinations.
In the above preparation method, the silane coupling agent is selected from one of KH-550, KH-560 or KH-792 or more
The combination of kind.
In the above preparation method, the anti-aging agent is selected from Isosorbide-5-Nitrae-dibenzyloxy benzene or 4,4- bis- (2.2- dimethyl benzyls)
The combination of one or both of diphenylamines.
In the above preparation method, white carbon black is gas-phase silica, the vulcanizing agent be selected from 2,5- dimethyl -2,5- it is bis- oneself
Alkane, the combination of one or both of penylene bismaleimide between N, N'-, the crosslinking agent are selected from three acrylic isocyanuric acids
Ester, di-tert-butyl peroxide, -4 methylimidazole of 2- ethyl, 2- phenylimidazole, 2 isopropyl imidazole, hexahydrophthalic acid
One of acid anhydride, trien, dimethylamine propylamine, diethyl amino propylamine or a variety of combinations.
According to another aspect of the present invention, a kind of wave absorbing patch prepared according to above-mentioned preparation method is additionally provided.
According to another aspect of the invention, application of the above-mentioned wave absorbing patch in mobile phone, tablet computer is additionally provided.
The present invention by formula optimization and technique improvement provide it is a kind of using silicon rubber as the wave absorbing patch of matrix,
The wave band for inhaling wave frequency rate in mobile phone radiation has stronger absorbent properties, is a kind of excellent mobile phone absorbing material.
It is the wave absorbing patch of matrix that the invention proposes a kind of based on silicon rubber, can be applied to mobile radiation protecting field,
The mobile communication microwave frequency band of 800-4000MHz can be effectively absorbed, while it is anti-to extend also to other electromagnetic shielding patches
Protector for collar domain.
It is provided by the invention to have the characteristics that tasteless is environmentally friendly based on the wave absorbing patch that silicon rubber is matrix, human contact without
Any injury, while also there is preferable heat resistance and ageing-resistant performance, it is anti-to provide long-term electromagnetism in interior of mobile phone
Shield not will cause because of the problems such as ageing properties decline under high temperature.
The present invention passes through the combination for selecting suitable silicon rubber and environment-friendly type vulcanizing agent, anti-aging agent, crosslinking agent in formula,
So that the wave absorbing patch of production has preferable mechanical property and processing performance.And by adjusting the suction of different grain size and shape
The corresponding content of wave agent makes the suction wave crest of wave absorbing patch fall in the radiation wave band of mobile phone and tablet computer.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the process flow chart of preparation wave absorbing patch according to an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's every other embodiment obtained belong to what the present invention protected
Range.
The preparation method of wave absorbing patch provided by the invention, comprising the following steps:
As shown in the step S101 of Fig. 1, according to parts by weight, 30~45 parts of silicon rubber, silane coupling agent 0.5~2 are weighed
Part, 0.5~1 part of anti-aging agent, 2~5 parts of paraffin oil, 37~55 parts of absorbent, 1~10 part of white carbon black, 0.1~0.5 part of stearic acid,
0.3~1 part of vulcanizing agent, 2~8 parts of crosslinking agent.Wherein, silicon rubber is selected from methyl vinyl silicone rubber, methyl silicone rubber, methyl second
One of alkenyl phenyl siloxane rubber or a variety of combinations.Silane coupling agent in KH-550, KH-560 or KH-792 one
Kind or a variety of combinations.Anti-aging agent is selected from Isosorbide-5-Nitrae-dibenzyloxy benzene or 4, one of bis- (2.2- dimethyl benzyl) diphenylamines of 4-
Or two kinds of combination.White carbon black is gas-phase silica, and vulcanizing agent is selected from 2,5- dimethyl -2,5- bishexane, and penylene is double between N, N'-
The combination of one or both of maleimide.Crosslinking agent be selected from three acrylic isocyanuric acid esters, di-tert-butyl peroxide,
- 4 methylimidazole of 2- ethyl, 2- phenylimidazole, 2 isopropyl imidazole, hexahydrophthalic anhydride, trien, dimethylamine
One of base propylamine, diethyl amino propylamine or a variety of combinations.According to parts by weight, absorbent includes the first of 32~45 parts
Absorbent and 5~10 parts of the second absorbent, wherein the first absorbent is the partial size by ball milling between 0.05-2 microns of model
Interior flaky carbonyl iron powder is enclosed, the second absorbent is spherical carbonyl iron dust of the partial size in the range of 0.5-10 microns.
As shown in the step S103 of Fig. 1, absorbent, white carbon black, anti-aging agent and silane coupling agent are uniformly mixed, obtain
One mixture.Specifically, the first absorbent, the second absorption are added in the high-speed mixer for being 700-900 revs/min to revolving speed
Agent, white carbon black, anti-aging agent and silane coupling agent, and stir 60-90 minutes, obtain the first mixture.
As shown in the step S105 of Fig. 1, silicon rubber, paraffin oil, stearic acid are added into the first mixture, and be uniformly mixed
Obtain the second mixture.Specifically, the first mixture, silicon rubber, paraffin oil, stearic acid are added in mixer, mixer control
80-100 degrees Celsius of melting temperature processed, mixing 30~after sixty minutes, obtain the second mixture.
As shown in the step S107 of Fig. 1, vulcanizing agent, crosslinking agent is added into the second mixture, and be kneaded, is mixed
Refining glue.Specifically, the second mixture, vulcanizing agent, crosslinking agent being added in open mill, powder to be eaten finishes, and progress is thin 5-6 times logical,
It beats triangle bag 5-10 times, clot 4-6 times obtains rubber compound.
As shown in the step S109 of Fig. 1, by mould heat pressure rubber compound, wave absorbing patch is made.Specifically, by rubber compound plus
Enter in the mold of vulcanizing press, by rubber compound compression moulding, wave absorbing patch is made, wherein the operation temperature of vulcanizing press
Degree is at 160-180 degree Celsius.
The technical solution in the present invention is clearly and completely described below in conjunction with specific embodiment.
Embodiment 1
1,30 parts of methyl vinyl silicone rubber according to parts by weight, is weighed respectively, 0.5 part of silane resin acceptor kh-550, is prevented
Old agent Isosorbide-5-Nitrae -0.5 part of dibenzyloxy benzene, 2 parts of paraffin oil, the sheet by the partial size of ball milling in the range of 0.05-2 microns
5 parts of the spherical carbonyl iron dust of 32 parts of carbonyl iron dust, partial size in the range of 0.5-10 microns, 1 part of gas-phase silica, stearic acid
0.1 part, vulcanizing agent 2,0.3 part of 5- dimethyl -2,5- bishexane, 2 parts of three acrylic isocyanuric acid ester of crosslinking agent.
2, the partial size by ball milling is added in the high-speed mixer for being 700 revs/min to revolving speed between 0.05-2 microns
It is spherical carbonyl iron dust in the range of 0.5-10 microns of flaky carbonyl iron powder, partial size in range, gas-phase silica, anti-old
Agent Isosorbide-5-Nitrae-dibenzyloxy benzene and silane resin acceptor kh-550, and stir 60 minutes, obtain the first mixture.
3, the first mixture, methyl vinyl silicone rubber, paraffin oil, stearic acid are added in mixer, mixer control
After 80 degrees Celsius of melting temperature, mixing 30 minutes, the second mixture is obtained.
4, by the second mixture, vulcanizing agent 2,5- dimethyl -2,5- bishexane, three acrylic isocyanuric acid ester of crosslinking agent add
Enter in open mill, powder to be eaten finishes, and progress is thin 5 times logical, beats triangle bag 5 times, clot 4 times, obtains rubber compound.
5, rubber compound is added in the mold of vulcanizing press, by rubber compound compression moulding, wave absorbing patch is made,
In, the operation temperature of vulcanizing press is at 160 degrees Celsius.
Embodiment 2
1,35 parts of methyl silicone rubber, KH-5601 parts of silane coupling agent, anti-aging agent 4,4- according to parts by weight, are weighed respectively
Bis- 0.8 part of (2.2- dimethyl benzyl) diphenylamines, 4 parts of paraffin oil, by the partial size of ball milling in the range of 0.05-2 microns
45 parts of flaky carbonyl iron powder, 10 parts of spherical carbonyl iron dust of the partial size in the range of 0.5-10 microns, gas-phase silica 5
Part, 0.5 part of stearic acid, 0.7 part of penylene bismaleimide, 4 parts of crosslinking agent di-tert-butyl peroxide between vulcanizing agent N, N'-.
2, the partial size by ball milling is added in the high-speed mixer for being 800 revs/min to revolving speed between 0.05-2 microns
It is spherical carbonyl iron dust in the range of 0.5-10 microns of flaky carbonyl iron powder, partial size in range, gas-phase silica, anti-old
Agent 4, bis- (2.2- dimethyl benzyl) diphenylamines of 4- and silane coupling agent KH-560, and stir 80 minutes, obtain the first mixture.
3, the first mixture, methyl silicone rubber, paraffin oil, stearic acid are added in mixer, mixer control is kneaded temperature
90 degrees Celsius of degree obtains the second mixture after mixing 50 minutes.
4, penylene bismaleimide, crosslinking agent di-tert-butyl peroxide between the second mixture, vulcanizing agent N, N'- are added
Enter in open mill, powder to be eaten finishes, and progress is thin 6 times logical, beats triangle bag 6 times, clot 5 times, obtains rubber compound.
5, rubber compound is added in the mold of vulcanizing press, by rubber compound compression moulding, wave absorbing patch is made,
In, the operation temperature of vulcanizing press is at 170 degrees Celsius.
Embodiment 3
1, according to parts by weight, weigh respectively 40 parts of methyl vinyl phenyl silicon rubber, KH-7922 parts of silane coupling agent,
Anti-aging agent Isosorbide-5-Nitrae -0.9 part of dibenzyloxy benzene, 3 parts of paraffin oil, the piece by the partial size of ball milling in the range of 0.05-2 microns
It is 8 parts of the spherical carbonyl iron dust of 40 parts of shape carbonyl iron dust, partial size in the range of 0.5-10 microns, 10 parts of gas-phase silica, hard
0.4 part of resin acid, vulcanizing agent 2,0.5 part of 5- dimethyl -2,5- bishexane, 6 parts of -4 methylimidazole of crosslinking agent 2- ethyl.
2, the partial size by ball milling is added in the high-speed mixer for being 900 revs/min to revolving speed between 0.05-2 microns
It is spherical carbonyl iron dust in the range of 0.5-10 microns of flaky carbonyl iron powder, partial size in range, gas-phase silica, anti-old
Agent Isosorbide-5-Nitrae-dibenzyloxy benzene and silane coupling agent KH-792, and stir 70 minutes, obtain the first mixture.
3, the first mixture, methyl vinyl phenyl silicon rubber, paraffin oil, stearic acid are added in mixer, mixer
100 degrees Celsius of melting temperature of control, mixing after forty minutes, obtain the second mixture.
4, by the second mixture, vulcanizing agent 2,5- dimethyl -2,5- bishexane, -4 methylimidazole of crosslinking agent 2- ethyl are added
In open mill, powder to be eaten is finished, and progress is thin 5 times logical, is beaten triangle bag 8 times, clot 6 times, is obtained rubber compound.
5, rubber compound is added in the mold of vulcanizing press, by rubber compound compression moulding, wave absorbing patch is made,
In, the operation temperature of vulcanizing press is at 180 degrees Celsius.
Embodiment 4
1,45 parts of methyl vinyl silicone rubber according to parts by weight, is weighed respectively, 1.5 parts of silane resin acceptor kh-550, is prevented
Old agent 4, bis- 1 part of (2.2- dimethyl benzyl) diphenylamines of 4-, 5 parts of paraffin oil, by the partial size of ball milling between 0.05-2 microns
35 parts of flaky carbonyl iron powder, 6 parts of spherical carbonyl iron dust of the partial size in the range of 0.5-10 microns, gas phase hard charcoal in range
Black 8 parts, 0.3 part of stearic acid, 0.9 part of penylene bismaleimide, 8 parts of crosslinking agent 2 isopropyl imidazole between vulcanizing agent N, N'-.
2, the partial size by ball milling is added in the high-speed mixer for being 750 revs/min to revolving speed between 0.05-2 microns
It is spherical carbonyl iron dust in the range of 0.5-10 microns of flaky carbonyl iron powder, partial size in range, gas-phase silica, anti-old
Agent 4, bis- (2.2- dimethyl benzyl) diphenylamines of 4- and silane resin acceptor kh-550, and stir 90 minutes, obtain the first mixture.
3, the first mixture, methyl vinyl silicone rubber, paraffin oil, stearic acid are added in mixer, mixer control
85 degrees Celsius of melting temperature, mixing after sixty minutes, obtains the second mixture.
4, penylene bismaleimide, the addition of crosslinking agent 2 isopropyl imidazole between the second mixture, vulcanizing agent N, N'- are opened
In mill, powder to be eaten is finished, and progress is thin 6 times logical, is beaten triangle bag 10 times, clot 5 times, is obtained rubber compound.
5, rubber compound is added in the mold of vulcanizing press, by rubber compound compression moulding, wave absorbing patch is made,
In, the operation temperature of vulcanizing press is at 165 degrees Celsius.
Embodiment 5
1,42 parts of methyl vinyl silicone rubber according to parts by weight, is weighed respectively, KH-5601.2 parts of silane coupling agent, is prevented
Old agent Isosorbide-5-Nitrae -0.7 part of dibenzyloxy benzene, 2.5 parts of paraffin oil, the piece by the partial size of ball milling in the range of 0.05-2 microns
9 parts of the spherical carbonyl iron dust of 38 parts of shape carbonyl iron dust, partial size in the range of 0.5-10 microns, 3 parts of gas-phase silica, tristearin
Sour 0.2 part, 1 part of penylene bismaleimide, 3 parts of crosslinking agent dimethylamine propylamine between vulcanizing agent N, N'-.
2, the partial size by ball milling is added in the high-speed mixer for being 850 revs/min to revolving speed between 0.05-2 microns
It is spherical carbonyl iron dust in the range of 0.5-10 microns of flaky carbonyl iron powder, partial size in range, gas-phase silica, anti-old
Agent Isosorbide-5-Nitrae-dibenzyloxy benzene and silane coupling agent KH-560, and stir 85 minutes, obtain the first mixture.
3, the first mixture, methyl vinyl silicone rubber, paraffin oil, stearic acid are added in mixer, mixer control
After 95 degrees Celsius of melting temperature, mixing 45 minutes, the second mixture is obtained.
4, penylene bismaleimide, the addition of crosslinking agent dimethylamine propylamine between the second mixture, vulcanizing agent N, N'- are opened
In mill, powder to be eaten is finished, and progress is thin 5 times logical, is beaten triangle bag 9 times, clot 4 times, is obtained rubber compound.
5, rubber compound is added in the mold of vulcanizing press, by rubber compound compression moulding, wave absorbing patch is made,
In, the operation temperature of vulcanizing press is at 175 degrees Celsius.
Embodiment 6
1,38 parts of methyl silicone rubber, KH-7921.7 parts of silane coupling agent, anti-aging agent 1 according to parts by weight, are weighed respectively,
0.6 part of 4- dibenzyloxy benzene, 3.5 parts of paraffin oil, the sheet carbonyl by the partial size of ball milling in the range of 0.05-2 microns
7 parts of the spherical carbonyl iron dust of 42 parts of iron powder, partial size in the range of 0.5-10 microns, 6 parts of gas-phase silica, stearic acid 0.3
Part, 0.6 part of penylene bismaleimide, 5 parts of crosslinking agent hexahydrophthalic anhydride between vulcanizing agent N, N'-.
2, the partial size by ball milling is added in the high-speed mixer for being 780 revs/min to revolving speed between 0.05-2 microns
It is spherical carbonyl iron dust in the range of 0.5-10 microns of flaky carbonyl iron powder, partial size in range, gas-phase silica, anti-old
Agent Isosorbide-5-Nitrae-dibenzyloxy benzene and silane coupling agent KH-792, and stir 75 minutes, obtain the first mixture.
3, the first mixture, methyl silicone rubber, paraffin oil, stearic acid are added in mixer, mixer control is kneaded temperature
80 degrees Celsius of degree obtains the second mixture after mixing 55 minutes.
4, penylene bismaleimide, crosslinking agent hexahydrophthalic anhydride between the second mixture, vulcanizing agent N, N'- are added
Enter in open mill, powder to be eaten finishes, and progress is thin 6 times logical, beats triangle bag 7 times, clot 5 times, obtains rubber compound.
5, rubber compound is added in the mold of vulcanizing press, by rubber compound compression moulding, wave absorbing patch is made,
In, the operation temperature of vulcanizing press is at 160 degrees Celsius.
Performance test:
Hardness, suction peak frequencies, absorption peak to the wave absorbing patch (with a thickness of 0.3mm) being prepared in embodiment 1-6
Intensity, 5db bandwidth, density, VOC content are tested respectively.
Wherein, by Shao A hardometer according to GB/T 6031-1998 test sample hardness.
1.5mm thickness print, which is measured, by arch field device inhales peak frequencies, absorption peak strength and -5db band in 1-18GHz
It is wide.
Pass through standard ASTM D292 method test density.
VOC (volatile organic compounds) content is tested by the method for ISO 248-2005.
Test result is as follows:
Table 1
As can be seen that the hardness of prepared wave absorbing patch has excellent mechanical property generally in 60HD or more, and
It is 800-4000Hz or so place with the drawing of biggish absorption peak in frequency, there is preferable absorbing property, mobile phone is completely covered
Radiated electromagnetic wave.The VOC content minimum 0.08% of the wave absorbing patch of preparation simultaneously, the standard well below external 0.5% are
A kind of wave absorbing patch of tasteless environmental protection, can satisfy the requirement of mobile phone absorbing material.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (12)
1. a kind of preparation method of wave absorbing patch characterized by comprising
According to parts by weight, 30~45 parts of silicon rubber, 0.5~2 part of silane coupling agent, 0.5~1 part of anti-aging agent, stone are weighed respectively
2~5 parts of wax oil, 37~55 parts of absorbent, 1~10 part of white carbon black, 0.1~0.5 part of stearic acid, 0.3~1 part of vulcanizing agent, crosslinking
2~8 parts of agent；
The absorbent, the white carbon black, the anti-aging agent and the silane coupling agent are uniformly mixed, the first mixing is obtained
Object；
The silicon rubber, the paraffin oil, the stearic acid are added into first mixture, and is uniformly mixed and obtains second
Mixture；
Vulcanizing agent, the crosslinking agent are added into second mixture, and is kneaded, rubber compound is obtained；And
By rubber compound described in mould heat pressure, wave absorbing patch is made.
2. the preparation method of wave absorbing patch according to claim 1, which is characterized in that according to parts by weight, the absorption
Agent includes 32~45 parts of the first absorbent and 5~10 parts of the second absorbent, wherein first absorbent is by ball milling
Flaky carbonyl iron powder of the partial size in the range of 0.05-2 microns, second absorbent is partial size between 0.5-10 microns
In the range of spherical carbonyl iron dust.
3. the preparation method of wave absorbing patch according to claim 2, which is characterized in that by the absorbent, the hard charcoal
The step of black, the described anti-aging agent and the silane coupling agent are uniformly mixed, obtain the first mixture specifically includes:
To revolving speed for first absorbent, second absorbent, institute are added in 700-900 revs/min of high-speed mixer
White carbon black, the anti-aging agent and the silane coupling agent are stated, and is stirred 60-90 minutes, first mixture is obtained.
4. the preparation method of wave absorbing patch according to claim 1, which is characterized in that be added in the first mixture of Xiang Suoshu
The silicon rubber, the paraffin oil, the stearic acid, and be uniformly mixed the step of obtaining the second mixture and specifically include:
First mixture, the silicon rubber, the paraffin oil, the stearic acid are added in mixer, the mixer
80-100 degrees Celsius of melting temperature of control, mixing 30~after sixty minutes, obtain the second mixture.
5. the preparation method of wave absorbing patch according to claim 1, which is characterized in that be added in the second mixture of Xiang Suoshu
Vulcanizing agent, the crosslinking agent, and the step of being kneaded, obtaining rubber compound specifically includes:
Second mixture, the vulcanizing agent, the crosslinking agent are added in open mill, powder to be eaten finishes, and carries out thin logical 5-6
It is secondary, beat triangle bag 5-10 times, clot 4-6 times obtains the rubber compound.
6. the preparation method of wave absorbing patch according to claim 1, which is characterized in that by being kneaded described in mould heat pressure
The step of glue, obtained wave absorbing patch, specifically includes:
The rubber compound is added in the mold of vulcanizing press, by the rubber compound compression moulding, the suction wave patch is made
Piece, wherein the operation temperature of the vulcanizing press is at 160-180 degrees Celsius.
7. the preparation method of wave absorbing patch according to claim 1, which is characterized in that the silicon rubber is selected from ethylene methacrylic
One of base silicon rubber, methyl silicone rubber, methyl vinyl phenyl silicon rubber or a variety of combinations.
8. the preparation method of wave absorbing patch according to claim 1, which is characterized in that the silane coupling agent is selected from KH-
550, one of KH-560 or KH-792 or a variety of combinations.
9. the preparation method of wave absorbing patch according to claim 1, which is characterized in that the anti-aging agent is selected from Isosorbide-5-Nitrae-dibenzyl
Oxygroup benzene or 4, the combination of one or both of bis- (2.2- dimethyl benzyl) diphenylamines of 4-.
10. the preparation method of wave absorbing patch according to claim 1, which is characterized in that white carbon black is gas-phase silica, institute
It states vulcanizing agent and is selected from 2,5- dimethyl -2,5- bishexane, the group of one or both of penylene bismaleimide between N, N'-
It closes, the crosslinking agent is selected from three acrylic isocyanuric acid esters, di-tert-butyl peroxide, -4 methylimidazole of 2- ethyl, 2- phenyl
Imidazoles, 2 isopropyl imidazole, hexahydrophthalic anhydride, trien, dimethylamine propylamine, in diethyl amino propylamine
One or more combinations.
11. a kind of wave absorbing patch of preparation method preparation according to claim 1 to 10.
12. application of the wave absorbing patch according to claim 11 in mobile phone, tablet computer.
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