CN109096563A - A kind of preparation method of high intensity filled rubber - Google Patents
A kind of preparation method of high intensity filled rubber Download PDFInfo
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- CN109096563A CN109096563A CN201811046901.9A CN201811046901A CN109096563A CN 109096563 A CN109096563 A CN 109096563A CN 201811046901 A CN201811046901 A CN 201811046901A CN 109096563 A CN109096563 A CN 109096563A
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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Abstract
The present invention relates to a kind of preparation methods of high-intensitive filled rubber, belong to field of polymer material preparing technology.The present invention obtains filter filter cake using corn stover and bagasse as raw material, it is blended after calcining with hydrochloric acid solution and modified filter residue is made, then modified filter residue is reacted to obtain modified filter cake in sulfuric acid with potassium permanganate, finally modified filter cake is kneaded with polymer and other auxiliary agents, it discharges up to high-intensitive filled rubber, the present invention is by fiber, cellulose, citric acid and chlorination nak response, make adsorption to K+, aluminium chloride is then added, partial holes insert aluminium ion, to enhance the intensity and wearability of filled rubber, by the plant fiber and cellulose hybrid reaction of glucose and introducing carboxylic group, after persulfuric acid and potassium permanganate oxidation reaction, fiber surface is set to introduce sulfonic acid group, reinforce the suction-operated in rubber between each molecule, the mechanical property of filled rubber is set to be further strengthened, it has broad application prospects.
Description
Technical field
The present invention relates to a kind of preparation methods of high-intensitive filled rubber, belong to field of polymer material preparing technology.
Background technique
Rubber is a kind of flexible polymer, and according to the difference for the mode that is made, rubber can be divided into synthetic rubber and day
Two class of right rubber.Natural rubber is mainly latex through cohesion, washing, forms, is drying to obtain natural rubber.Synthetic rubber is by people
Prepared by work synthetic method, different types of rubber can be synthesized using different raw materials, such as butadiene rubber, neoprene rubber
Glue, butadiene-styrene rubber, nitrile rubber etc..Rubber material is wide because having fabulous oil resistance and excellent physical mechanical property
General to be applied in industrial production, such as O-ring, oil sealing, leather cup, diaphragm, valve, bellows are also used for production offset plate and wear-resisting
Part.But the intensity of rubber material is not high, weather resistance is bad, be prone to wear, electrical property is inferior, elasticity is slightly lower etc., practical raw
In production its performance can be improved by filling filler.
Filling in traditional rubber compounding mainly has various carbon blacks, CaCO3、SiO2、BaSO4, talcum powder, kaolin etc., by
The molding dynamic sealing of rubber material institute of these filler materials preparation, usually exist skin-friction force is big, product surface intolerant to
Mill is used for the problem of life time when dynamic sealing is short, and friction posterior surface picking causes sealing premature failure, is limited use
Range.
Nano aluminium oxide can be used as filler material and be filled in rubber material, its addition can greatly improve its hardness and
Wearability, this filled composite high molecular material have become a key areas of high molecular material research.But it is nano oxidized
Aluminium powder is easy to reunite, poor with rubber compatibility, it is difficult to be dispersed in organic matrix, direct or excessive filling is often held
Easily lead to material mechanical properties decrease and it is brittle the disadvantages of.
Therefore, it needs to develop a kind of filled rubber material for being able to solve the above problem to be of great significance.
Summary of the invention
The technical problems to be solved by the invention: for current filled rubber poor mechanical property cause rubber abrasive-resistance and
The bad defect of intensity provides a kind of preparation method of high-intensitive filled rubber.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of preparation method of high intensity filled rubber, it is characterised in that specific preparation step are as follows:
(1) by corn stover and bagasse 5:1 in mass ratio investment beaker, with sodium hydroxide solution soaking maize stalk and sweet
Bagasse places the beaker isothermal reaction in water-bath, filter residue is obtained by filtration after reaction, wash with distilled water filter residue 3~5 times；
(2) according to parts by weight, filter residue, 2~3 parts of Citric acid crystals, 0.5~0.8 part of chlorine after weighing 7~8 parts of above-mentioned cleanings
Change and be stirred in potassium and 30~32 parts of distilled water investment beakers with blender, mixed liquor is made, mixed liquor is added into beaker
The glucose of quality 10~15% is placed the beaker and is vibrated in sonic oscillation instrument, and filter cake is obtained by filtration after oscillation, successively uses hydrochloric acid
It is cleaned filter cake 3~5 times with distilled water；
(3) above-mentioned filter cake is placed in Muffle furnace, increases temperature under nitrogen atmosphere, calcined product is made in isothermal reaction, will forge
It burns in product and hydrochloric acid investment beaker, 40~50min is stood under room temperature, suspension is made, suspension quality 5 is added into beaker
~8% aluminium chloride crystal powder, is mixed with blender, and modified filter residue is obtained by filtration after stirring；
(4) by above-mentioned modified filter residue and sulfuric acid solution 1:10 in mass ratio investment three-necked flask, three-necked flask is placed in ice water
It in bath, is mixed with blender and mix products is made, the potassium permanganate of mix products quality 3~5% is added into three-necked flask
Powder continues that 20~30min is mixed with the revolving speed of 300~350r/min in ice-water bath, modified filter cake is obtained by filtration, uses
Distilled water is placed in oven and dried after cleaning 3~5 times, obtains dry modified filter cake；
(5) according to parts by weight, 60~62 poly- butadiene-styrene rubber, 30~33 parts of polyvinyl fluorides, 7~9 parts of above-mentioned dry modifications are weighed
Filter cake, 1~2 part of carbon black and 2~3 parts of magnesia investment mixer high temperatures are kneaded, and are discharged up to high-intensitive filled rubber.
The mass fraction of sodium hydroxide solution as described in step (1) is 15~20%, and the bath temperature in water-bath is 80
~90 DEG C, the isothermal reaction time is 4~6h.
The speed of agitator of blender described in step (2) be 1100~1200r/min, be stirred the time be 50~
60min, the frequency of sonic oscillation instrument are 30~33kHz, and duration of oscillation is 3~5h, and the mass fraction of hydrochloric acid is 5~8%.
Temperature is increased to 250~280 DEG C in Muffle furnace described in step (3), and the isothermal reaction time is 100~
120min, the mass fraction of hydrochloric acid are 8~10%, and the revolving speed of blender is 300~320r/min, mixing time is 40~
50min。
The mass fraction of sulfuric acid solution described in step (4) is 30~40%, and the revolving speed of blender is 300~350r/
Min, mixing time are 30~40min, and the temperature in baking oven is 105~110 DEG C, and drying time is 2~3h.
Revolving speed in mixer described in step (5) is 70~90r/min, temperature is 140~160 DEG C, mixing time
For 15~20min.
The beneficial effects of the present invention are:
(1) present invention first impregnates corn stover and bagasse in lye high temperature, filter residue is obtained by filtration after immersion, by filter residue
With citric acid hybrid reaction, glucose sonic oscillation is added after reaction, filter cake is obtained by filtration after oscillation, filter cake is then placed in horse
Not furnace high temperature is calcined, and is blended and introduces aluminium chloride after calcining with hydrochloric acid solution, is mixed and modified filter residue is made, will then change
Property filter residue and the potassium permanganate hybrid reaction in sulfuric acid, modified filter cake is obtained by filtration after reaction, finally will modified filter cake with polymerize
Object and other auxiliary agents are kneaded, and are discharged up to high-intensitive filled rubber, the present invention is raw material in alkali using corn stover and bagasse
Boiling soak extraction goes out fiber and cellulose therein in liquid, then fiber, cellulose, citric acid and potassium chloride are mixed instead
It answers, adsorbs potassium ion by chelation and ionic bond, be attached to plant fiber and cellulose surface, chlorine is then added
Change aluminium, the potassium ion of fiber surface is precipitated, to generate hole, partial holes insert aluminium ion, and the addition of metal ion makes
The mechanical property of filled rubber is effectively enhanced, to enhance the intensity and wearability of filled rubber；
(2) present invention by glucose and introduces the plant fiber and cellulose hybrid reaction of carboxylic group, has in glucose
Multiple hydroxyls, hydroxyl are coated on plant fiber on glucose molecule by hydrogen bond, covalent bond absorption, generate using glucose as ball
The microcosmic agglomerated particle of the heart generates half extremely coarse charing plant fiber pipe structure of surface, through persulfuric acid after high temperature sintering
And potassium permanganate oxidation reaction after, make fiber surface introduce sulfonic acid group, sulfonic acid group be polar group be conducive to fiber with
And cellulose is scattered in polymer, to reinforce the suction-operated in rubber between each molecule, makes the mechanical property of filled rubber
It can be further strengthened, have broad application prospects.
Specific embodiment
Corn stover and bagasse 5:1 in mass ratio are put into beaker, the sodium hydroxide for being 15~20% with mass fraction
Solution soaking maize stalk and bagasse, place the beaker in water-bath, under conditions of bath temperature is 80~90 DEG C, constant temperature
4~6h is reacted, filter residue is obtained by filtration after reaction, wash with distilled water filter residue 3~5 times；According to parts by weight, it weighs on 7~8 parts
It is used in filter residue, 2~3 parts of Citric acid crystals, 0.5~0.8 part of potassium chloride and 30~32 parts of distilled water investment beakers after stating cleaning
Blender is stirred 50~60min with the revolving speed of 1100~1200r/min, and mixed liquor is made, mixed liquor is added into beaker
The glucose of quality 10~15% places the beaker in sonic oscillation instrument, frequency be 30~33kHz under conditions of oscillation 3~
Filter cake is obtained by filtration in 5h after oscillation, the hydrochloric acid and distilled water for being successively 5~8% with mass fraction clean filter cake 3~5 times；It will be upper
It states filter cake to be placed in Muffle furnace, under nitrogen atmosphere, increases temperature to 250~280 DEG C, 100~120min of isothermal reaction, be made
Calcined product puts into the hydrochloric acid that calcined product and mass fraction are 8~10% in beaker, and 40~50min, system are stood under room temperature
Suspension is obtained, the aluminium chloride crystal powder of suspension quality 5~8% is added into beaker, with blender with 300~320r/min
Revolving speed be mixed 40~50min, modified filter residue is obtained by filtration after stirring；By above-mentioned modified filter residue and mass fraction be 30~
40% sulfuric acid solution 1:10 in mass ratio is put into three-necked flask, three-necked flask is placed in ice-water bath, with blender with 300
30~40min is mixed in the revolving speed of~350r/min, and mix products are made, and mix products quality 3 is added into three-necked flask
~5% potassium permanganate powder continues that 20~30min, filtering is mixed with the revolving speed of 300~350r/min in ice-water bath
Modified filter cake is obtained, be put into baking oven after 3~5 times dry 2 under conditions of temperature is 105~110 DEG C wash with distilled water~
3h obtains dry modified filter cake；According to parts by weight, 60~62 poly- butadiene-styrene rubber, 30~33 parts of polyvinyl fluorides, 7~9 parts are weighed
It is 70~90r/min, temperature in revolving speed in above-mentioned dry modified filter cake, 1~2 part of carbon black and 2~3 parts of magnesia investment mixers
Under conditions of degree is 140~160 DEG C, it is kneaded 15~20min, is discharged up to high-intensitive filled rubber.
Corn stover and bagasse 5:1 in mass ratio are put into beaker, the sodium hydroxide solution for being 15% with mass fraction
Soaking maize stalk and bagasse, place the beaker in water-bath, under conditions of bath temperature is 80 DEG C, isothermal reaction 4h,
Filter residue is obtained by filtration after reaction, wash with distilled water filter residue 3 times；According to parts by weight, filter residue after weighing 7 parts of above-mentioned cleanings, 2
It is mixed with the revolving speed stirring of 1100r/min with blender in part Citric acid crystal, 0.5 part of potassium chloride and 30 parts of distilled water investment beakers
50min is closed, mixed liquor is made, the glucose of mixed liquor quality 10% is added into beaker, places the beaker in sonic oscillation instrument,
3h is vibrated under conditions of frequency is 30kHz, filter cake is obtained by filtration after oscillation, successively the hydrochloric acid with mass fraction for 5% and distillation
Water cleans filter cake 3 times；Above-mentioned filter cake is placed in Muffle furnace, under nitrogen atmosphere, increases temperature to 250 DEG C, isothermal reaction
Calcined product is made in 100min, and the hydrochloric acid solution that calcined product and mass fraction are 8% is put into beaker, is stood under room temperature
Suspension is made in 40min, the aluminium chloride crystal powder of suspension quality 5% is added into beaker, with blender with 300r/min
Revolving speed be mixed 40min, modified filter residue is obtained by filtration after stirring；The sulphur for being 30% by above-mentioned modified filter residue and mass fraction
Acid solution 1:10 in mass ratio is put into three-necked flask, three-necked flask is placed in ice-water bath, with blender with 300r/min's
30min is mixed in revolving speed, and mix products are made, and the potassium permanganate powder of mix products quality 3% is added into three-necked flask,
Continue that 20min is mixed with the revolving speed of 300r/min in ice-water bath, modified filter cake is obtained by filtration, 3 times wash with distilled water
After be put into baking oven dry 2h under conditions of temperature is 105 DEG C, obtain dry modified filter cake；According to parts by weight, 60 are weighed
In poly- butadiene-styrene rubber, 30 parts of polyvinyl fluorides, 7 parts of above-mentioned dry modified filter cakes, 1 part of carbon black and 2 parts of magnesia investment mixers,
Under conditions of revolving speed is 70r/min, temperature is 140 DEG C, it is kneaded 15min, is discharged up to high-intensitive filled rubber.
Corn stover and bagasse 5:1 in mass ratio are put into beaker, the sodium hydroxide solution for being 17% with mass fraction
Soaking maize stalk and bagasse, place the beaker in water-bath, under conditions of bath temperature is 85 DEG C, isothermal reaction 5h,
Filter residue is obtained by filtration after reaction, wash with distilled water filter residue 4 times；According to parts by weight, filter residue after weighing 7 parts of above-mentioned cleanings, 2
It is mixed with the revolving speed stirring of 1150r/min with blender in part Citric acid crystal, 0.7 part of potassium chloride and 31 parts of distilled water investment beakers
55min is closed, mixed liquor is made, the glucose of mixed liquor quality 13% is added into beaker, places the beaker in sonic oscillation instrument,
4h is vibrated under conditions of frequency is 31kHz, filter cake is obtained by filtration after oscillation, successively the hydrochloric acid with mass fraction for 6% and distillation
Water cleans filter cake 4 times；Above-mentioned filter cake is placed in Muffle furnace, under nitrogen atmosphere, increases temperature to 270 DEG C, isothermal reaction
Calcined product is made in 110min, and the hydrochloric acid solution that calcined product and mass fraction are 9% is put into beaker, is stood under room temperature
Suspension is made in 45min, the aluminium chloride crystal powder of suspension quality 6% is added into beaker, with blender with 310r/min
Revolving speed be mixed 45min, modified filter residue is obtained by filtration after stirring；The sulphur for being 35% by above-mentioned modified filter residue and mass fraction
Acid solution 1:10 in mass ratio is put into three-necked flask, three-necked flask is placed in ice-water bath, with blender with 325r/min's
35min is mixed in revolving speed, and mix products are made, and the potassium permanganate powder of mix products quality 4% is added into three-necked flask,
Continue that 25min is mixed with the revolving speed of 325r/min in ice-water bath, modified filter cake is obtained by filtration, 4 times wash with distilled water
After be put into baking oven dry 2h under conditions of temperature is 107 DEG C, obtain dry modified filter cake；According to parts by weight, 61 are weighed
In poly- butadiene-styrene rubber, 31 parts of polyvinyl fluorides, 8 parts of above-mentioned dry modified filter cakes, 1 part of carbon black and 2 parts of magnesia investment mixers,
Under conditions of revolving speed is 80r/min, temperature is 150 DEG C, it is kneaded 17min, is discharged up to high-intensitive filled rubber.
Corn stover and bagasse 5:1 in mass ratio are put into beaker, the sodium hydroxide solution for being 20% with mass fraction
Soaking maize stalk and bagasse, place the beaker in water-bath, under conditions of bath temperature is 90 DEG C, isothermal reaction 6h,
Filter residue is obtained by filtration after reaction, wash with distilled water filter residue 5 times；According to parts by weight, filter residue after weighing 8 parts of above-mentioned cleanings, 3
It is mixed with the revolving speed stirring of 1200r/min with blender in part Citric acid crystal, 0.8 part of potassium chloride and 32 parts of distilled water investment beakers
60min is closed, mixed liquor is made, the glucose of mixed liquor quality 15% is added into beaker, places the beaker in sonic oscillation instrument,
5h is vibrated under conditions of frequency is 33kHz, filter cake is obtained by filtration after oscillation, successively the hydrochloric acid with mass fraction for 8% and distillation
Water cleans filter cake 5 times；Above-mentioned filter cake is placed in Muffle furnace, under nitrogen atmosphere, increases temperature to 280 DEG C, isothermal reaction
Calcined product is made in 120min, and the hydrochloric acid solution that calcined product and mass fraction are 10% is put into beaker, is stood under room temperature
Suspension is made in 50min, the aluminium chloride crystal powder of suspension quality 8% is added into beaker, with blender with 320r/min
Revolving speed be mixed 50min, modified filter residue is obtained by filtration after stirring；The sulphur for being 40% by above-mentioned modified filter residue and mass fraction
Acid solution 1:10 in mass ratio is put into three-necked flask, three-necked flask is placed in ice-water bath, with blender with 350r/min's
40min is mixed in revolving speed, and mix products are made, and the potassium permanganate powder of mix products quality 5% is added into three-necked flask,
Continue that 30min is mixed with the revolving speed of 350r/min in ice-water bath, modified filter cake is obtained by filtration, 5 times wash with distilled water
After be put into baking oven dry 3h under conditions of temperature is 110 DEG C, obtain dry modified filter cake；According to parts by weight, 62 are weighed
In poly- butadiene-styrene rubber, 33 parts of polyvinyl fluorides, 9 parts of above-mentioned dry modified filter cakes, 2 parts of carbon blacks and 3 parts of magnesia investment mixers,
Under conditions of revolving speed is 90r/min, temperature is 160 DEG C, it is kneaded 20min, is discharged up to high-intensitive filled rubber.
The rubber that comparative example is produced with company of Beijing is as a comparison case by high-intensitive filled rubber produced by the present invention
It is detected with the rubber in comparative example, testing result is as shown in table 1:
Hardness test
It is tested according to standard GB/T531.
Tensile strength is tested according to standard GB/T528-2009 " vulcanized rubber or thermoplastic elastomer tensile stress-strain performance
Measurement " tested.
Tearing strength test is measured according to standard GB/T529-2008, rate of extension 50mm/min,.
Abrasion resistance test is detected using Akron abrasion machine by the regulation of GB/T1689-2014.
1 performance measurement result of table
According to data in table 1 it is found that high intensity filled rubber produced by the present invention, has intensity height, wear-resisting property good, ageing-resistant
Performance is by force and the features such as good airproof performance, and technique is convenient and simple, raw material are sufficient, at low cost, with wide prospect of the application.
Claims (6)
1. a kind of preparation method of high intensity filled rubber, it is characterised in that specific preparation step are as follows:
(1) by corn stover and bagasse 5:1 in mass ratio investment beaker, with sodium hydroxide solution soaking maize stalk and sweet
Bagasse places the beaker isothermal reaction in water-bath, filter residue is obtained by filtration after reaction, wash with distilled water filter residue 3~5 times；
(2) according to parts by weight, filter residue, 2~3 parts of Citric acid crystals, 0.5~0.8 part of chlorine after weighing 7~8 parts of above-mentioned cleanings
Change and be stirred in potassium and 30~32 parts of distilled water investment beakers with blender, mixed liquor is made, mixed liquor is added into beaker
The glucose of quality 10~15% is placed the beaker and is vibrated in sonic oscillation instrument, and filter cake is obtained by filtration after oscillation, successively uses hydrochloric acid
It is cleaned filter cake 3~5 times with distilled water；
(3) above-mentioned filter cake is placed in Muffle furnace, increases temperature under nitrogen atmosphere, calcined product is made in isothermal reaction, will forge
It burns in product and hydrochloric acid investment beaker, 40~50min is stood under room temperature, suspension is made, suspension quality 5 is added into beaker
~8% aluminium chloride crystal powder, is mixed with blender, and modified filter residue is obtained by filtration after stirring；
(4) by above-mentioned modified filter residue and sulfuric acid solution 1:10 in mass ratio investment three-necked flask, three-necked flask is placed in ice water
It in bath, is mixed with blender and mix products is made, the potassium permanganate of mix products quality 3~5% is added into three-necked flask
Powder continues that 20~30min is mixed with the revolving speed of 300~350r/min in ice-water bath, modified filter cake is obtained by filtration, uses
Distilled water is placed in oven and dried after cleaning 3~5 times, obtains dry modified filter cake；
(5) according to parts by weight, 60~62 poly- butadiene-styrene rubber, 30~33 parts of polyvinyl fluorides, 7~9 parts of above-mentioned dry modifications are weighed
Filter cake, 1~2 part of carbon black and 2~3 parts of magnesia investment mixer high temperatures are kneaded, and are discharged up to high-intensitive filled rubber.
2. a kind of preparation method of high-intensitive filled rubber according to claim 1, it is characterised in that: institute in step (1)
The mass fraction for the sodium hydroxide solution stated is 15~20%, and the bath temperature in water-bath is 80~90 DEG C, the isothermal reaction time
For 4~6h.
3. a kind of preparation method of high-intensitive filled rubber according to claim 1, it is characterised in that: institute in step (2)
The speed of agitator for the blender stated is 1100~1200r/min, and being stirred the time is 50~60min, the frequency of sonic oscillation instrument
Rate is 30~33kHz, and duration of oscillation is 3~5h, and the mass fraction of hydrochloric acid is 5~8%.
4. a kind of preparation method of high-intensitive filled rubber according to claim 1, it is characterised in that: institute in step (3)
Temperature is increased to 250~280 DEG C in the Muffle furnace stated, and the isothermal reaction time is 100~120min, and the mass fraction of hydrochloric acid is 8
~10%, the revolving speed of blender is 300~320r/min, and mixing time is 40~50min.
5. a kind of preparation method of high-intensitive filled rubber according to claim 1, it is characterised in that: institute in step (4)
The mass fraction for the sulfuric acid solution stated is 30~40%, and the revolving speed of blender is 300~350r/min, mixing time 30
~40min, the temperature in baking oven are 105~110 DEG C, and drying time is 2~3h.
6. a kind of preparation method of high-intensitive filled rubber according to claim 1, it is characterised in that: institute in step (5)
The revolving speed in mixer stated is 70~90r/min, temperature is 140~160 DEG C, and mixing time is 15~20min.
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| CN109762383A (en) * | 2019-01-12 | 2019-05-17 | 高俊 | A kind of preparation method of high salt tolerant anti-fouling anti-drag coating |
| CN109763376A (en) * | 2019-01-28 | 2019-05-17 | 常州麒通国际贸易有限公司 | A kind of preparation method of Retention Aid in Papermaking |
| CN109909443A (en) * | 2019-04-23 | 2019-06-21 | 佛山市博特美陶瓷有限公司 | A kind of preparation method of water-glass sand |
| CN109910420A (en) * | 2019-02-20 | 2019-06-21 | 谭凤香 | A kind of preparation method of insulation high-temperature-resistant battery wrapping film |
| CN110172239A (en) * | 2019-05-30 | 2019-08-27 | 谭俊鸿 | A kind of preparation method of heat-resisting high tenacity sealing material |
| CN110452537A (en) * | 2019-07-06 | 2019-11-15 | 张明 | A kind of preparation method of high strength heat resistant silicon rubber |
| CN112011135A (en) * | 2020-09-10 | 2020-12-01 | 杨琼英 | Puncture-preventing high-strength sole material and preparation method thereof |
| CN112137237A (en) * | 2020-09-25 | 2020-12-29 | 扬州健步鞋业有限公司 | Antiskid insulating leather shoes |
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| CN109762383A (en) * | 2019-01-12 | 2019-05-17 | 高俊 | A kind of preparation method of high salt tolerant anti-fouling anti-drag coating |
| CN109763376A (en) * | 2019-01-28 | 2019-05-17 | 常州麒通国际贸易有限公司 | A kind of preparation method of Retention Aid in Papermaking |
| CN109910420A (en) * | 2019-02-20 | 2019-06-21 | 谭凤香 | A kind of preparation method of insulation high-temperature-resistant battery wrapping film |
| CN109909443A (en) * | 2019-04-23 | 2019-06-21 | 佛山市博特美陶瓷有限公司 | A kind of preparation method of water-glass sand |
| CN109909443B (en) * | 2019-04-23 | 2020-11-20 | 义乌市君胜科技有限公司 | Preparation method of sodium silicate-bonded sand |
| CN110172239A (en) * | 2019-05-30 | 2019-08-27 | 谭俊鸿 | A kind of preparation method of heat-resisting high tenacity sealing material |
| CN110452537A (en) * | 2019-07-06 | 2019-11-15 | 张明 | A kind of preparation method of high strength heat resistant silicon rubber |
| CN112011135A (en) * | 2020-09-10 | 2020-12-01 | 杨琼英 | Puncture-preventing high-strength sole material and preparation method thereof |
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