CN107236159A - Isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket and preparation method thereof - Google Patents
Isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket and preparation method thereof Download PDFInfo
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- CN107236159A CN107236159A CN201710444216.0A CN201710444216A CN107236159A CN 107236159 A CN107236159 A CN 107236159A CN 201710444216 A CN201710444216 A CN 201710444216A CN 107236159 A CN107236159 A CN 107236159A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0024—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid beta-D-Glucans; (beta-1,3)-D-Glucans, e.g. paramylon, coriolan, sclerotan, pachyman, callose, scleroglucan, schizophyllan, laminaran, lentinan or curdlan; (beta-1,6)-D-Glucans, e.g. pustulan; (beta-1,4)-D-Glucans; (beta-1,3)(beta-1,4)-D-Glucans, e.g. lichenan; Derivatives thereof
- C08B37/0027—2-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
- C08B37/003—Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof
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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
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
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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
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- C08K2201/011—Nanostructured additives
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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
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention discloses a kind of isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket and preparation method thereof, the preparation method includes：1）Chitosan is sequentially passed through into acid soak, soaked then in turn through alkyl benzene sulphonate sodium solution and alkyl naphthalene sulfonic acid sodium solution to obtain modification of chitosan；2）At 145 175 DEG C, isoprene rubber, butadiene-styrene rubber, carbon black, sulphur and modification of chitosan are carried out first vulcanization the first mixture is made；3）At 175 185 DEG C, the first mixture, oxide nano rare earth, polyester fiber, vulcanizing agent are subjected to post-cure processing transformer sealing gasket is made.The isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket has an excellent mechanical property and ageing resistace, and the preparation method has process simple and raw material is easy to get advantage.
Description
Technical field
The present invention relates to transformer seal, in particular it relates to a kind of isoprene rubber/butadiene-styrene rubber composite transformer sealing
Pad and preparation method thereof.
Background technology
Sealing gasket, is a strength member of oil-filled transformer, plays sealing, prevent the effect of transformer oil leak.It is existing
Some rubber gaskets cause Leakage in Transformer oil, have had a strong impact on transformation because its mechanical property is unstable or easy aging
The service life of device, huge economic loss is caused to power system and user.
The content of the invention
It is an object of the invention to provide a kind of isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket and preparation method thereof,
The isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket has excellent mechanical property and ageing resistace, and the preparation
Advantage that method has process simple and raw material is easy to get.
To achieve these goals, the invention provides a kind of isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket
Preparation method, including：
1）Chitosan is sequentially passed through into acid soak, then in turn through alkyl benzene sulphonate sodium solution and alkyl naphthalene sulfonic acid sodium solution
Soaked to obtain modification of chitosan；
2）At 145-175 DEG C, isoprene rubber, butadiene-styrene rubber, carbon black, sulphur and modification of chitosan are carried out first vulcanization to make
Obtain the first mixture；
3）At 175-185 DEG C, the first mixture, oxide nano rare earth, polyester fiber, vulcanizing agent are carried out at post-cure
Transformer sealing gasket is made in reason.
Present invention also offers a kind of isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket, the isoprene rubber/butylbenzene rubber
Glue composite transformer sealing gasket is prepared by above-mentioned preparation method.
In the above-mentioned technical solutions, the present invention first by carrying out acid solution, sodium alkyl benzene sulfonate and alkane successively to chitosan
Base sodium naphthalene sulfonate is modified and then obtains modification of chitosan, then passes through isoprene rubber, butadiene-styrene rubber, carbon black, sulphur and modified shell
Glycan carries out first vulcanization so that the first mixture is made, then by the first mixture, oxide nano rare earth, polyester fiber,
Vulcanizing agent carries out post-cure processing and transformer sealing gasket is made.The transformer sealing gasket has excellent mechanical property and anti-ageing
Change performance, and the preparation method has process simple and raw material is easy to get advantage.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Embodiment
The embodiment to the present invention is described in detail below.It should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The invention provides a kind of preparation method of isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket, including：
1）Chitosan is sequentially passed through into acid soak, then in turn through alkyl benzene sulphonate sodium solution and alkyl naphthalene sulfonic acid sodium solution
Soaked to obtain modification of chitosan；
2）At 145-175 DEG C, isoprene rubber, butadiene-styrene rubber, carbon black, sulphur and modification of chitosan are carried out first vulcanization to make
Obtain the first mixture；
3）At 175-185 DEG C, the first mixture, oxide nano rare earth, polyester fiber, vulcanizing agent are carried out at post-cure
Transformer sealing gasket is made in reason.
In the step 1 of the present invention）In, the consumption and concentration of each material can be selected in wide scope, but in order to
Make obtained transformer sealing gasket that there is more excellent mechanical property and ageing resistace, it is preferable that in step 1）In, relative to
The chitosan of 100 parts by weight, the consumption of acid solution, alkyl benzene sulphonate sodium solution and alkyl naphthalene sulfonic acid sodium solution is each independently
200-300 parts by weight；Also, the pH of acid solution is 5-6, and the concentration of alkyl benzene sulphonate sodium solution and alkyl naphthalene sulfonic acid sodium solution is each
It independently is 20-30 weight %.
In the step 1 of the present invention）In, the specific species of sodium alkyl benzene sulfonate and Negel can be in wide model
Interior selection is enclosed, but in order that obtained transformer sealing gasket has more excellent mechanical property and ageing resistace, it is preferable that
Sodium alkyl benzene sulfonate is cetyl benzenesulfonic acid sodium, neopelex or octadecyl benzene in alkyl benzene sulphonate sodium solution
Sodium sulfonate；Negel in alkyl naphthalene sulfonic acid sodium solution is cetyl sodium naphthalene sulfonate, dodecyl sodium naphthalene sulfonate or
Octadecyl sodium naphthalene sulfonate.
In the step 1 of the present invention）In, the actual conditions of immersion can be selected in wide scope, but in order that be made
Transformer sealing gasket have more excellent mechanical property and ageing resistace, it is preferable that in step 1）In, the immersion often walked is expired
It is enough lower condition：Soaking temperature is 25-30 DEG C, and soak time is 8-10h.
In the step 2 of the present invention）In, the consumption of each material can be selected in wide scope, but in order that obtained
Transformer sealing gasket has more excellent mechanical property and ageing resistace, it is preferable that in step 2）In, isoprene rubber, butylbenzene
Rubber, carbon black, the weight ratio of sulphur and modification of chitosan are 100：45-60：10-17：5-8：40-48.
In the step 2 of the present invention）In, the time vulcanized for the first time can select in wide scope, but in order that be made
Transformer sealing gasket have more excellent mechanical property and ageing resistace, it is preferable that in step 2）In, vulcanize for the first time when
Between be 8-10h.
In the step 2 of the present invention）In, the molecular weight of isoprene rubber and butadiene-styrene rubber can be selected in wide scope,
But in order that obtained transformer sealing gasket has more excellent mechanical property and ageing resistace, it is preferable that in step 2）
In, the weight average molecular weight of isoprene rubber is 30,000-5 ten thousand, and the weight average molecular weight of butadiene-styrene rubber is 40,000-7 ten thousand.
In the step 3 of the present invention）In, the consumption of each material can be selected in wide scope, but in order that obtained
Transformer sealing gasket has more excellent mechanical property and ageing resistace, it is preferable that in step 3）In, the first mixture, receive
Rice rare earth oxide, polyester fiber, the amount ratio of vulcanizing agent are 100：2-2.8：7-10：1.5-4.
In the step 3 of the present invention）In, the time of post-cure can select in wide scope, but in order that be made
Transformer sealing gasket have more excellent mechanical property and ageing resistace, it is preferable that in step 3）In, post-cure when
Between be 3-5h.
In the step 3 of the present invention）In, the specific species of oxide nano rare earth can be selected in wide scope, still
In order that obtained transformer sealing gasket has more excellent mechanical property and ageing resistace, it is preferable that in step 3）In, receive
Rice rare earth oxide is selected from least one of nano lanthanum oxide, nano oxidized praseodymium, nano oxidized gadolinium and nano oxidized dysprosium.
In the step 3 of the present invention）In, the particle diameter of oxide nano rare earth can be selected in wide scope, but in order to
Make obtained transformer sealing gasket that there is more excellent mechanical property and ageing resistace, it is preferable that oxide nano rare earth
Average grain diameter is 8-15nm.
In the step 3 of the present invention）In, the specific species of vulcanizing agent can be selected in wide scope, but in order that system
The transformer sealing gasket obtained has more excellent mechanical property and ageing resistace, it is preferable that vulcanizing agent is selected from tetraethyl
At least one of base thiuram, tetramethylthiuram disulfide and tetrabenzyl thiuram-disulfide.
Present invention also offers a kind of isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket, the isoprene rubber/butylbenzene rubber
Glue composite transformer sealing gasket is prepared by above-mentioned preparation method.
The present invention will be described in detail by way of examples below.
Embodiment 1
1）At 28 DEG C, the chitosan of 100 parts by weight is sequentially passed through to the hydrochloric acid of 250 parts by weight（PH is 5.5）9h is soaked, then
Sequentially pass through the alkyl benzene sulphonate sodium solution of 250 parts by weight（Concentration is 25 weight %, cetyl benzenesulfonic acid sodium solution）With 250
The alkyl naphthalene sulfonic acid sodium solution of parts by weight（Concentration is 25 weight %, cetyl sodium naphthalene sulfonate solution）Immersion 9h is carried out to obtain
Modification of chitosan；
2）At 165 DEG C, by isoprene rubber（Weight average molecular weight is 30,000-5 ten thousand）, butadiene-styrene rubber（Weight average molecular weight is 40,000-7
Ten thousand）, carbon black, sulphur and modification of chitosan be according to 100：50：15：7：45 weight are mixed than carrying out first vulcanization 9h with being made first
Thing；
3）At 180 DEG C, by the first mixture, oxide nano rare earth（Nano lanthanum oxide, average grain diameter is 10nm）, terylene it is fine
Dimension, vulcanizing agent are according to 100：2.4：8：Transformer sealing gasket A1 is made than carrying out post-cure 4h processing in 3 weight.
Embodiment 2
1）At 25 DEG C, the chitosan of 100 parts by weight is sequentially passed through to the hydrochloric acid of 200 parts by weight（PH is 5）Soak 8h, Ran Houyi
The secondary alkyl benzene sulphonate sodium solution Jing Guo 200 parts by weight（Concentration is 20 weight %, neopelex solution）With 200 weights
Measure the alkyl naphthalene sulfonic acid sodium solution of part（Concentration is 20 weight %, dodecyl sodium naphthalene sulfonate solution）Immersion 8h is carried out to be changed
Property chitosan；
2）At 145 DEG C, by isoprene rubber（Weight average molecular weight is 30,000-5 ten thousand）, butadiene-styrene rubber（Weight average molecular weight is 40,000-7
Ten thousand）, carbon black, sulphur and modification of chitosan be according to 100：45：10：5：40 weight are mixed than carrying out first vulcanization 8h with being made first
Thing；
3）At 175-185 DEG C, by the first mixture, oxide nano rare earth（Nano oxidized praseodymium, average grain diameter is 8nm）, wash
Synthetic fibre fiber, vulcanizing agent are according to 100：2：7：Transformer sealing gasket A2 is made than carrying out post-cure 3h processing in 1.5 weight.
Embodiment 3
1）At 30 DEG C, the chitosan of 100 parts by weight is sequentially passed through to the hydrochloric acid of 300 parts by weight（PH is 6）10h is soaked, then
Sequentially pass through the alkyl benzene sulphonate sodium solution of 300 parts by weight（Concentration is 30 weight %, octadecyl benzenesulfonic acid sodium solution）And 200-
The alkyl naphthalene sulfonic acid sodium solution of 300 parts by weight（Concentration is 30 weight %, octadecyl sodium naphthalene sulfonate solution）Carry out immersion 10h with
Obtain modification of chitosan；
2）At 175 DEG C, by isoprene rubber（Weight average molecular weight is 30,000-5 ten thousand）, butadiene-styrene rubber（Weight average molecular weight is 40,000-7
Ten thousand）, carbon black, sulphur and modification of chitosan be according to 100：60：17：8：48 weight are mixed than carrying out first vulcanization 10h with being made first
Compound；
3）At 185 DEG C, by the first mixture, oxide nano rare earth（Nano oxidized dysprosium, average grain diameter is 8-15nm）, terylene
Fiber, vulcanizing agent are according to 100：2.8：10：Transformer sealing gasket A3 is made than carrying out post-cure 5h processing in 4 weight.
Comparative example 1
Method according to embodiment 1 carries out that transformer sealing gasket B1 is made, unlike, step 1）In be not used acid soak.
Comparative example 2
Method according to embodiment 1 carries out that transformer sealing gasket B2 is made, unlike, step 1）In be not used alkyl benzene sulphonate
Sodium solution.
Comparative example 3
Method according to embodiment 1 carries out that transformer sealing gasket B3 is made, unlike, step 1）In be not used alkyl naphthalene sulfonic acid
Sodium solution.
Comparative example 4
Method according to embodiment 1 carries out that transformer sealing gasket B4 is made, unlike, step 1）In acid solution and alkyl is not used
Benzene sulfonic acid sodium salt solution.
Comparative example 5
Method according to embodiment 1 carries out that transformer sealing gasket B5 is made, unlike, step 1）In acid solution and alkyl is not used
Naphthoic acid sodium solution.
Detect example 1
Detect the tensile strength and ageing resistace of above-mentioned transformer sealing gasket（Soak 25# transformer oil compression/%, tolerance
25# transformer oil compression performances, the testing conditions of leaching 25# transformer oil compressions are compression 25%, 125 DEG C and 168h, tolerance
The testing conditions of 25# transformer oil compression performances are 125 DEG C and 168h）, specific testing result is shown in Table 1.
Table 1
By above-described embodiment, comparative example and detection example, the transformer sealing gasket that the present invention is provided has excellent stretching
Intensity and ageing resistace.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of preparation method of isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket, it is characterised in that including：
1）Chitosan is sequentially passed through into acid soak, then in turn through alkyl benzene sulphonate sodium solution and alkyl naphthalene sulfonic acid sodium solution
Soaked to obtain modification of chitosan；
2）At 145-175 DEG C, isoprene rubber, butadiene-styrene rubber, carbon black, sulphur and modification of chitosan are carried out first vulcanization to make
Obtain the first mixture；
3）At 175-185 DEG C, first mixture, oxide nano rare earth, polyester fiber, vulcanizing agent are subjected to secondary sulphur
Change processing and transformer sealing gasket is made.
2. preparation method according to claim 1, wherein, in step 1）In, the shell relative to 100 parts by weight gathers
Sugar, the consumption of the acid solution, alkyl benzene sulphonate sodium solution and alkyl naphthalene sulfonic acid sodium solution is each independently 200-300 weight
Part；Also, the pH of the acid solution is 5-6, the concentration of the alkyl benzene sulphonate sodium solution and alkyl naphthalene sulfonic acid sodium solution is each only
It is on the spot 20-30 weight %；
Preferably, sodium alkyl benzene sulfonate is cetyl benzenesulfonic acid sodium, detergent alkylate sulphur in the alkyl benzene sulphonate sodium solution
Sour sodium or octadecyl benzenesulfonic acid sodium；Negel in the alkyl naphthalene sulfonic acid sodium solution is cetyl naphthalene sulfonic acids
Sodium, dodecyl sodium naphthalene sulfonate or octadecyl sodium naphthalene sulfonate.
3. preparation method according to claim 1, wherein, in step 1）In, the immersion often walked meets following condition：Immersion
Temperature is 25-30 DEG C, and soak time is 8-10h.
4. the preparation method according to any one in claim 1-3, wherein, in step 2）In, the isoprene rubber, fourth
Benzene rubber, carbon black, the weight ratio of sulphur and modification of chitosan are 100：45-60：10-17：5-8：40-48.
5. preparation method according to claim 4, wherein, in step 2）In, the time vulcanized for the first time is 8-10h.
6. preparation method according to claim 4, wherein, in step 2）In, the weight average molecular weight of the isoprene rubber is 3
Ten thousand-5 ten thousand, the weight average molecular weight of the butadiene-styrene rubber is 40,000-7 ten thousand.
7. the preparation method according to claim 5 or 6, wherein, in step 3）In, first mixture, nano rare earth
Oxide, polyester fiber, the amount ratio of vulcanizing agent are 100：2-2.8：7-10：1.5-4.
8. preparation method according to claim 7, wherein, in step 3）In, the time of the post-cure is 3-5h.
9. preparation method according to claim 7, wherein, in step 3）In, the oxide nano rare earth is selected from nanometer
At least one of lanthana, nano oxidized praseodymium, nano oxidized gadolinium and nano oxidized dysprosium；
Preferably, the average grain diameter of the oxide nano rare earth is 8-15nm；
It is highly preferred that the vulcanizing agent is selected from tetraethylthiuram disulfide, tetramethylthiuram disulfide and the sulphur of tetrabenzyl two
Change at least one of thiuram.
10. a kind of isoprene rubber/butadiene-styrene rubber composite transformer sealing gasket, it is characterised in that the isoprene rubber/butadiene-styrene rubber
Composite transformer sealing gasket is prepared by the preparation method described in any one in claim 1-9.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810860078.9A CN108948455A (en) | 2017-06-13 | 2017-06-13 | A kind of isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
| CN201710444216.0A CN107236159B (en) | 2017-06-13 | 2017-06-13 | Isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
| CN201810860033.1A CN108948454A (en) | 2017-06-13 | 2017-06-13 | Isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
| CN201810860032.7A CN108948453A (en) | 2017-06-13 | 2017-06-13 | A kind of isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
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| CN201710444216.0A CN107236159B (en) | 2017-06-13 | 2017-06-13 | Isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
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| CN201810860078.9A Division CN108948455A (en) | 2017-06-13 | 2017-06-13 | A kind of isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
| CN201810860032.7A Division CN108948453A (en) | 2017-06-13 | 2017-06-13 | A kind of isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
| CN201810860033.1A Division CN108948454A (en) | 2017-06-13 | 2017-06-13 | Isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
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| CN201810860032.7A Withdrawn CN108948453A (en) | 2017-06-13 | 2017-06-13 | A kind of isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
| CN201810860033.1A Withdrawn CN108948454A (en) | 2017-06-13 | 2017-06-13 | Isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
| CN201810860078.9A Withdrawn CN108948455A (en) | 2017-06-13 | 2017-06-13 | A kind of isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
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| CN201810860033.1A Withdrawn CN108948454A (en) | 2017-06-13 | 2017-06-13 | Isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
| CN201810860078.9A Withdrawn CN108948455A (en) | 2017-06-13 | 2017-06-13 | A kind of isoprene rubber/butadiene-styrene rubber composite transformer gasket and preparation method thereof |
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Citations (4)
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| US20070265434A1 (en) * | 2004-01-06 | 2007-11-15 | Jean-Guy Lehoux | Simplified method to retrieve chitosan from acidic solutions thereof |
| CN104927125A (en) * | 2015-06-08 | 2015-09-23 | 东至群盛化工设备有限公司 | Flange sealing gasket for chemical sewage pipe connection |
| CN105199172A (en) * | 2015-10-19 | 2015-12-30 | 青岛科技大学 | Composite rubber reinforcing system, styrene butadiene rubber using reinforcing system and preparation method of styrene butadiene rubber |
| CN105622847A (en) * | 2016-03-21 | 2016-06-01 | 南京工业大学 | Synthesis method and application of water soluble chitosan-based flocculant |
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2017
- 2017-06-13 CN CN201710444216.0A patent/CN107236159B/en active Active
- 2017-06-13 CN CN201810860032.7A patent/CN108948453A/en not_active Withdrawn
- 2017-06-13 CN CN201810860033.1A patent/CN108948454A/en not_active Withdrawn
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070265434A1 (en) * | 2004-01-06 | 2007-11-15 | Jean-Guy Lehoux | Simplified method to retrieve chitosan from acidic solutions thereof |
| CN104927125A (en) * | 2015-06-08 | 2015-09-23 | 东至群盛化工设备有限公司 | Flange sealing gasket for chemical sewage pipe connection |
| CN105199172A (en) * | 2015-10-19 | 2015-12-30 | 青岛科技大学 | Composite rubber reinforcing system, styrene butadiene rubber using reinforcing system and preparation method of styrene butadiene rubber |
| CN105622847A (en) * | 2016-03-21 | 2016-06-01 | 南京工业大学 | Synthesis method and application of water soluble chitosan-based flocculant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108948455A (en) | 2018-12-07 |
| CN108948454A (en) | 2018-12-07 |
| CN107236159B (en) | 2018-10-02 |
| CN108948453A (en) | 2018-12-07 |
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