CN103131062B - Composite slow expansion type water stop rubber and preparation method thereof - Google Patents
Composite slow expansion type water stop rubber and preparation method thereof Download PDFInfo
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- CN103131062B CN103131062B CN201310104215.3A CN201310104215A CN103131062B CN 103131062 B CN103131062 B CN 103131062B CN 201310104215 A CN201310104215 A CN 201310104215A CN 103131062 B CN103131062 B CN 103131062B
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Abstract
The invention discloses composite slow expansion type water stop rubber which comprises an expansion part and a composite part, wherein the expansion part comprises crude rubber, carbon black, bentonite, an anti-aging agent, accelerator and an expanding agent; and the composite part comprises crude rubber, carbon black, calcium powder, a softening agent and accelerator. The preparation method of the composite slow expansion type water stop rubber comprises the following steps: respectively breaking, rolling and compounding the two parts; and then, adding into an extrusion apparatus, and performing extrusion molding. The composite slow expansion type water stop rubber disclosed by the invention has favorable physical and mechanical properties; and compared with common slow expansion type water stop rubber, a layer of water-permeable rubber is arranged at the outer layer of an expansion body, and water in concrete can be firstly absorbed by the rubber at the upper layer, thereby ensuring that the inner expansion body can not expand before concrete setting and can expand only in case of water leakage. Thus, the invention achieves the optimal waterproof effect.
Description
Technical field
The present invention relates to field of functional materials, more particularly to a kind of Composite slow expansion type water stop rubber and preparation method thereof.
Background technology
It is well known that on the whole, rubber is a kind of hydrophobic material, in its strand except carbon, hydrogen segment with
Outward, also containing a small amount of hydrophilic group.Upon contact with water, hydrone is by the way that diffusion, knitting wool is thin and the physics such as surface adsorption is made
With in rubber body, rubber volume is set to expand rapidly.At the same time, hydrone is combined with the hydrophilic radical in rubber body,
Form a kind of affinity.So, hydrophilic radical is made to dissolve or expand into the water in rubber body, in the inside and outside formation of rubber bodies
Permeable pressure head.This pressure reduction also has facilitation to water to the infiltration in rubber body.Hydrophilic group continuously absorbs water
Point, make rubber expand deformation.When anti deformational force is suitable with permeable pressure head, balance is just reached, imbibition effect can
Keep relative stability.
Rubber is mainly made up of high polymerization degree carbon, hydrogen chain link, is in itself lyophobic dust.If containing enough in rubber
Hydrophilic group or hydrophilic substance, upon contact with water, hydrone is entered by physical actions such as diffusion, capillary channel and surface adsorption
Enter rubber, with hydrophilic group in rubber or material extremely strong affinity is formed, promote rubber constantly to absorb moisture and deform upon, extremely
When rubber itself anti deformational force and suitable permeable pressure head, expansion water-stop rubber is in metastable state.Such high-absorbent material
Water absorption course have 2 kinds of forms:One kind is that capillary attraction and diffusion realize water suction;Another kind is hydrogen bond action, moisture
Son is combined closely with hydrophilic group, and formation combines water, and based on latter water sucting mode.
When expansion water-stop rubber is contacted with water, hydrone is by physical actions such as diffusion, capillarity and surface adsorption
Into in rubber, and then extremely strong affinity is formed with hydrophilic radical in rubber.Because hydrophilic resin constantly absorbs moisture, cause
Deform upon rubber, when anti deformational force and permeable pressure head reach balance, water swelling rubber reaches steady statue.
City is succeeded in developing and thrown in expansion water-stop rubber as a kind of new watertight rubber material the eighties in 20th century
.The great advantage of expansion water-stop rubber is exactly with excellent sealing leak stopping function. at present hydraulic engineering subway tunnel,
The construction fields such as underground foundation work dam are widely applied.Expansion water-stop rubber can commensurate structure deformation, rise elasticity it is close
Envelope is acted on, and with imbibition, with the special efficacy of water sealing.Its operation principle is, when malformation exceedes material
During elastic recovery capability, expansion water-stop rubber meets volume inflatable 1 times or several times after water, so as to block the water of seepage, reaches anti-
The purpose of water.Especially in terms of stoppage engineering, it instead of cement grout, year glass grouting and epoxy resin leak stopping etc. pass
System construction method.
Due to unique effect of the expansion water-stop rubber in plugging operations, it can make sealing paint filling, rubber fastening band
Deng leak stopping articles for use.Once contacting with water, rubber volume increases rapidly.All spaces in so as to fill gap, play sealing and plugging
Effect.
In current construction joint waterproof for building, adopt watertight rubber more. it is wherein in the majority with slow expansion type.But existing sealing
Rubber delays swollen technology can not get a desired effect, due to when concrete is poured into a mould it occur frequently that concrete is not also parched completely,
Solidification sealing rod begins to expand.Sealing rod displacement, or sealing rod are caused concrete distending.Its reason is primarily due to cement
Itself it is also moisture, and sealing rod is water-swellable, so often affecting construction quality in actual use, does not reach waterproof
Effect.
The content of the invention
In to solve construction waterproof for building, concrete is not also parched completely, and watertight rubber begins to the problem for expanding, this
Invention can not expand there is provided one kind before concrete solidifies completely, and what is only just expanded in the case where there is leak is compound slow
Swollen type watertight rubber.
Technical scheme is as follows：
The Composite slow expansion type water stop rubber that the present invention is announced is made up of dilation and composite portion, wherein, expansion
Part is made up of rubber, white carbon black, bentonite, age resistor, accelerator and extender；Composite portion is by rubber, white carbon black, calcium
Powder, softening agent and accelerator composition.
The component content of Composite slow expansion type water stop rubber that the present invention is announced is：
Dilation：Weight portion
Rubber 10 ~ 50
White carbon black 0.5 ~ 7
Bentonite 2 ~ 15
Age resistor 0.1 ~ 1
Accelerator 0.1 ~ 1
Extender 1 ~ 10
Composite portion：Weight portion
Rubber 30 ~ 70
White carbon black 0.1 ~ 1
Calcium powder 2 ~ 20
Softening agent 0.5 ~ 5
Accelerator 0.1 ~ 1
It is preferred that：
Dilation：Weight portion
Rubber 20 ~ 40
White carbon black 1 ~ 4
Bentonite 5 ~ 10
Age resistor 0.2 ~ 0.5
Accelerator 0.2 ~ 0.6
Extender 3 ~ 6
Composite portion：Weight portion
Rubber 40 ~ 60
White carbon black 0.2 ~ 0.5
Calcium powder 5 ~ 10
Softening agent 1 ~ 3
Accelerator 0.2 ~ 0.5.
The Composite slow expansion type water stop rubber that the present invention is announced, wherein, age resistor is antioxidant D, antioxidant A, age resistor
H, antioxidant D D, antioxidant 4010, antioxidant 4010NA, age resistor UOP788, antioxidant 264, antioxidant SP, age resistor
2246th, one or more in antioxidant 2246 S, antioxidant A W.
The Composite slow expansion type water stop rubber that the present invention is announced, wherein, accelerator is diphenylguanidine, altax, accelerator
One or more in CZ, Vulcanization accelerator TMTD, accelerator NS, Urotropinum, accelerator TT, accelerant N A-22 and captax.
The Composite slow expansion type water stop rubber that the present invention is announced, wherein, extender is extender Y.
The Composite slow expansion type water stop rubber that the present invention is announced, wherein, the particle diameter of bentonite, age resistor and extender is 50
~500nm。
The preparation method of the Composite slow expansion type water stop rubber that the present invention is announced is comprised the following steps：
（1）It is prepared by dilation：Rubber is carried out into broken on a mill glue, is embraced after roller, at 40 ~ 60 DEG C of roller temperature, led to thin
10 times, then bentonite, white carbon black, age resistor, accelerator and extender are added thereto, one piece is put into mixing in banbury, mixes
Refining temperature is 100 ~ 120 DEG C, then standby,
（2）It is prepared by composite portion：Rubber is carried out into broken on a mill glue, is embraced after roller, at 40 ~ 60 DEG C of roller temperature, led to thin
12 times, then white carbon black, calcium powder, softening agent and accelerator are added thereto, one piece of mixing is then standby,
（3）Extrusion molding：By step（1）And step（2）The two brood lac one piece of addition extrusion equipments for preparing, one-shot forming is obtained
To product.
Wherein, step（1）With（2）In roller temperature be preferably 50 DEG C.
Step（1）Middle melting temperature is preferably 110 DEG C.
It is that speed of expansion is slow that common slow expansion type delays swollen sealing rod, and can not be solved non-bloating before concrete is not parched
Problem.Not only physical and mechanical propertiess are good for Composite slow expansion type water stop rubber disclosed in this invention, and due to external in expansion
Layer has one layer of permeable rubber, and the moisture in concrete is first absorbed by outer layer rubber, so as to ensure that internal expansion body in concrete
Do not expand before solidification, only just expand in the case where there is leak, so as to reach best waterproof effect.
Specific embodiment
The following examples are that the present invention is described in further detail.
Embodiment 1
1.1 Composite slow expansion type water stop rubbers are constituted
Dilation：Weight portion
Rubber 20
White carbon black 1
Bentonite 5
Antioxidant D 0.2
Diphenylguanidine 0.2
Extender Y 3
Composite portion：Weight portion
Rubber 40
White carbon black 0.2
Calcium powder 5
Softening agent 1
Diphenylguanidine 0.2
1.2 preparation method
（1）It is prepared by dilation：Rubber is carried out into broken on a mill glue, is embraced after roller, at 40 DEG C of roller temperature, led to thin by 10
It is secondary, then bentonite, white carbon black, age resistor, accelerator and extender are added thereto, one piece is put into mixing in banbury, mixing
Temperature is 100 DEG C, then standby,
（2）It is prepared by composite portion：Rubber is carried out into broken on a mill glue, is embraced after roller, at 40 DEG C of roller temperature, led to thin by 12
It is secondary, then white carbon black, calcium powder, softening agent and accelerator are added thereto, one piece of mixing is then standby,
（3）Extrusion molding：By step（1）And step（2）The two brood lac one piece of addition extrusion equipments for preparing, one-shot forming is obtained
To product.
The physical and mechanical propertiess of 1.3 Composite slow expansion type water stop rubbers
The Composite slow expansion type water stop rubber of preparation is carried out into water resistant pressure, maximum water absorbent rate, thermostability and low temperature flexibility
Physical and mechanical propertiess index determining, the results are shown in Table 1.
The physical and mechanical propertiess of the Composite slow expansion type water stop rubber of table 1
| Water resistant pressure, MPa | Maximum water absorbent rate, % | Thermostability | Low temperature flexibility |
| 2.5 | 350 | 80 DEG C of high temperature is without trickling | - 20 DEG C of flawlesses |
Composite slow expansion type water stop rubber physical and mechanical propertiess as can be seen from Table 1 by this method preparation are good, complete
Full up foot construction needs.
The stagnant water effect of 1.4 Composite slow expansion type water stop rubbers
Choosing the multiple Composite slow expansion type water stop rubber and common slow expansion type water stop rubber of the preparation of embodiment 1 carries out stagnant water effect
Test, chooses the concrete walls seam for finishing of just having constructed at, and concrete is not dry, respectively by Composite slow expansion type water stop rubber and commonly
Slow expansion type water stop rubber is filled in crack, is observed after 24 hours, finds common slow expansion type water stop rubber dilatancy, is lost
Sealing effect, and Composite slow expansion type water stop rubber does not change, and now concrete has been parched substantially.Again to mixed
A certain amount of water is instilled in solidifying soil, is observed after 12 hours, find to be not changed in when common slow expansion type water stop rubber and 24 hours,
Water is flowed down from crack, and common slow expansion type water stop rubber loses the effect of sealing, and Composite slow expansion type water stop rubber is now
Expanded deformation, moisture is stopped completely, plays good sealing effect.
Test explanation, Composite slow expansion type water stop rubber prepared by the present invention can prevent coagulation than common slow expansion type water stop rubber
Soil is not dry and cause watertight rubber premature inflation, can preferably play sealing effect.
Embodiment 2
2.1 Composite slow expansion type water stop rubbers are constituted
Dilation：Weight portion
Rubber 40
White carbon black 4
Bentonite 10
Antioxidant 4010 0.5
Accelerator TT 0.6
Extender Y 6
Composite portion：Weight portion
Rubber 60
White carbon black 0.5
Calcium powder 10
Softening agent 3
Accelerator TT 0.5
2.2 preparation method
（1）It is prepared by dilation：Rubber is carried out into broken on a mill glue, is embraced after roller, at 60 DEG C of roller temperature, led to thin by 10
It is secondary, then bentonite, white carbon black, age resistor, accelerator and extender are added thereto, one piece is put into mixing in banbury, mixing
Temperature is 120 DEG C, then standby,
（2）It is prepared by composite portion：Rubber is carried out into broken on a mill glue, is embraced after roller, at 60 DEG C of roller temperature, led to thin by 12
It is secondary, then white carbon black, calcium powder, softening agent and accelerator are added thereto, one piece of mixing is then standby,
（3）Extrusion molding：By step（1）And step（2）The two brood lac one piece of addition extrusion equipments for preparing, one-shot forming is obtained
To product.
The physical and mechanical propertiess of 2.3 Composite slow expansion type water stop rubbers
The Composite slow expansion type water stop rubber of preparation is entered into water resistant pressure, maximum water absorbent rate, thermostability and low temperature flexibility
Physical and mechanical propertiess index determining, the results are shown in Table 2.
The physical and mechanical propertiess of the Composite slow expansion type water stop rubber of table 2
| Water resistant pressure, MPa | Maximum water absorbent rate, % | Thermostability | Low temperature flexibility |
| 2.4 | 345 | 80 DEG C of high temperature is without trickling | - 20 DEG C of flawlesses |
Composite slow expansion type water stop rubber physical and mechanical propertiess as can be seen from Table 2 by this method preparation are good, complete
Full up foot construction needs.
The stagnant water effect of 2.4 Composite slow expansion type water stop rubbers
Choosing the multiple Composite slow expansion type water stop rubber and common slow expansion type water stop rubber of the preparation of embodiment 2 carries out stagnant water effect
Test, chooses the concrete walls seam for finishing of just having constructed at, and concrete is not dry, respectively by Composite slow expansion type water stop rubber and commonly
Slow expansion type water stop rubber is filled in crack, is observed after 24 hours, finds common slow expansion type water stop rubber dilatancy, is lost
Sealing effect, and Composite slow expansion type water stop rubber does not change, and now concrete has been parched substantially.Again to mixed
A certain amount of water is instilled in solidifying soil, is observed after 12 hours, find to be not changed in when common slow expansion type water stop rubber and 24 hours,
Water is flowed down from crack, and common slow expansion type water stop rubber loses the effect of sealing, and Composite slow expansion type water stop rubber is now
Expanded deformation, moisture is stopped completely, plays good sealing effect.
Test explanation, Composite slow expansion type water stop rubber prepared by the present invention can prevent coagulation than common slow expansion type water stop rubber
Soil is not dry and cause watertight rubber premature inflation, can preferably play sealing effect.
Embodiment 3
3.1 Composite slow expansion type water stop rubbers are constituted
Dilation：Weight portion
Rubber 30
White carbon black 3
Bentonite 8
Antioxidant 2246 0.3
Vulcanization accelerator TMTD 0.4
Extender Y 5
Composite portion：Weight portion
Rubber 50
White carbon black 0.3
Calcium powder 8
Softening agent 2
Vulcanization accelerator TMTD 0.3
3.2 preparation method
（1）It is prepared by dilation：Rubber is carried out into broken on a mill glue, is embraced after roller, at 50 DEG C of roller temperature, led to thin by 10
It is secondary, then bentonite, white carbon black, age resistor, accelerator and extender are added thereto, one piece is put into mixing in banbury, mixing
Temperature is 110 DEG C, then standby,
（2）It is prepared by composite portion：Rubber is carried out into broken on a mill glue, is embraced after roller, at 50 DEG C of roller temperature, led to thin by 12
It is secondary, then white carbon black, calcium powder, softening agent and accelerator are added thereto, one piece of mixing is then standby,
（3）Extrusion molding：By step（1）And step（2）The two brood lac one piece of addition extrusion equipments for preparing, one-shot forming is obtained
To product.
The physical and mechanical propertiess of 3.3 Composite slow expansion type water stop rubbers
The Composite slow expansion type water stop rubber of preparation is carried out into water resistant pressure, maximum water absorbent rate, thermostability and low temperature flexibility
Physical and mechanical propertiess index determining, the results are shown in Table 3.
The physical and mechanical propertiess of the Composite slow expansion type water stop rubber of table 3
| Water resistant pressure, MPa | Maximum water absorbent rate, % | Thermostability | Low temperature flexibility |
| 2.7 | 370 | 80 DEG C of high temperature is without trickling | - 20 DEG C of flawlesses |
Composite slow expansion type water stop rubber physical and mechanical propertiess as can be seen from Table 3 by this method preparation are good, complete
Full up foot construction needs.
The stagnant water effect of 3.4 Composite slow expansion type water stop rubbers
Choosing the multiple Composite slow expansion type water stop rubber and common slow expansion type water stop rubber of the preparation of embodiment 3 carries out stagnant water effect
Test, chooses the concrete walls seam for finishing of just having constructed at, and concrete is not dry, respectively by Composite slow expansion type water stop rubber and commonly
Slow expansion type water stop rubber is filled in crack, is observed after 24 hours, finds common slow expansion type water stop rubber dilatancy, is lost
Sealing effect, and Composite slow expansion type water stop rubber does not change, and now concrete has been parched substantially.Again to mixed
A certain amount of water is instilled in solidifying soil, is observed after 12 hours, find to be not changed in when common slow expansion type water stop rubber and 24 hours,
Water is flowed down from crack, and common slow expansion type water stop rubber loses the effect of sealing, and Composite slow expansion type water stop rubber is now
Expanded deformation, moisture is stopped completely, plays good sealing effect.
Test explanation, Composite slow expansion type water stop rubber prepared by the present invention can prevent coagulation than common slow expansion type water stop rubber
Soil is not dry and cause watertight rubber premature inflation, can preferably play sealing effect.
Embodiment 4
4.1 Composite slow expansion type water stop rubbers are constituted
Dilation：Weight portion
Rubber 50
White carbon black 7
Bentonite 15
Antioxidant H 1
Accelerator NS 1
Extender Y 10
Composite portion：Weight portion
Rubber 70
White carbon black 1
Calcium powder 20
Softening agent 5
Accelerator NS 1
4.2 preparation method
Preparation method is with embodiment 3.
The physical and mechanical propertiess of 4.3 Composite slow expansion type water stop rubbers
The Composite slow expansion type water stop rubber of preparation is carried out into water resistant pressure, maximum water absorbent rate, thermostability and low temperature flexibility
Physical and mechanical propertiess index determining, the results are shown in Table 4.
The physical and mechanical propertiess of the Composite slow expansion type water stop rubber of table 4
| Water resistant pressure, MPa | Maximum water absorbent rate, % | Thermostability | Low temperature flexibility |
| 2.4 | 340 | 80 DEG C of high temperature is without trickling | - 20 DEG C of flawlesses |
Composite slow expansion type water stop rubber physical and mechanical propertiess as can be seen from Table 4 by this method preparation are good, complete
Full up foot construction needs.
The stagnant water effect of 4.4 Composite slow expansion type water stop rubbers
Choosing the multiple Composite slow expansion type water stop rubber and common slow expansion type water stop rubber of the preparation of embodiment 4 carries out stagnant water effect
Test, chooses the concrete walls seam for finishing of just having constructed at, and concrete is not dry, respectively by Composite slow expansion type water stop rubber and commonly
Slow expansion type water stop rubber is filled in crack, is observed after 24 hours, finds common slow expansion type water stop rubber dilatancy, is lost
Sealing effect, and Composite slow expansion type water stop rubber does not change, and now concrete has been parched substantially.Again to mixed
A certain amount of water is instilled in solidifying soil, is observed after 12 hours, find to be not changed in when common slow expansion type water stop rubber and 24 hours,
Water is flowed down from crack, and common slow expansion type water stop rubber loses the effect of sealing, and Composite slow expansion type water stop rubber is now
Expanded deformation, moisture is stopped completely, plays good sealing effect.
Test explanation, Composite slow expansion type water stop rubber prepared by the present invention can prevent coagulation than common slow expansion type water stop rubber
Soil is not dry and cause watertight rubber premature inflation, can preferably play sealing effect.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (9)
1. a kind of Composite slow expansion type water stop rubber, it is characterised in that:The rubber is by dilation and is arranged on outside dilation
The composite portion composition of layer；
The component content of the dilation is：
Dilation：Weight portion
The component content of the composite portion is：
Composite portion：Weight portion
2. Composite slow expansion type water stop rubber as claimed in claim 1, it is characterised in that：The component content of the rubber is：
Dilation：Weight portion
Composite portion：Weight portion
3. the Composite slow expansion type water stop rubber as described in claim 1-2 any one claim, it is characterised in that：Age resistor is
Antioxidant D, antioxidant A, antioxidant H, antioxidant D D, antioxidant 4010, antioxidant 4010NA, age resistor UOP788, age resistor
264th, one or more in antioxidant SP, antioxidant 2246, antioxidant 2246 S, antioxidant A W.
4. the Composite slow expansion type water stop rubber as described in claim 1-2 any one claim, it is characterised in that：Accelerator is
Diphenylguanidine, altax, accelerant CZ, Vulcanization accelerator TMTD, accelerator NS, Urotropinum, accelerator TT, accelerant N A-22 and
One or more in captax.
5. the Composite slow expansion type water stop rubber as described in claim 1-2 any one claim, it is characterised in that：Extender is
Extender Y.
6. the Composite slow expansion type water stop rubber as described in claim 1-2 any one claim, it is characterised in that：Bentonite,
The particle diameter of age resistor and extender is 50～500nm.
7. a kind of method for preparing the Composite slow expansion type water stop rubber as described in claim 1-2 any one claim, it is special
Levy and be：The method is comprised the following steps：
(1) prepared by dilation：Rubber is carried out into broken on a mill glue, is embraced after roller, at 40～60 DEG C of roller temperature, led to thin by 10
It is secondary, then bentonite, white carbon black, age resistor, accelerator and extender are added thereto, one piece is put into mixing in banbury, mixing
Temperature is 100～120 DEG C, then standby,
(2) prepared by composite portion：Rubber is carried out into broken on a mill glue, is embraced after roller, at 40～60 DEG C of roller temperature, led to thin by 12
It is secondary, then white carbon black, calcium powder, softening agent and accelerator are added thereto, one piece of mixing is then standby,
(3) extrusion molding：Two brood lac one piece of addition extrusion equipments prepared by step (1) and step (2), one-shot forming is produced
Product.
8. preparation method as claimed in claim 7, it is characterised in that：Roller temperature in step (1) and (2) is 50 DEG C.
9. preparation method as claimed in claim 7, it is characterised in that：Melting temperature is 110 DEG C in step (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310104215.3A CN103131062B (en) | 2013-03-28 | 2013-03-28 | Composite slow expansion type water stop rubber and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310104215.3A CN103131062B (en) | 2013-03-28 | 2013-03-28 | Composite slow expansion type water stop rubber and preparation method thereof |
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| CN103131062A CN103131062A (en) | 2013-06-05 |
| CN103131062B true CN103131062B (en) | 2017-05-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104059266A (en) * | 2014-06-20 | 2014-09-24 | 攀枝花市扬驰胶业有限公司 | National standard waterstop rubber compound utilizing reclaimed rubber and preparation method of the national standard waterstop |
| CN109624122A (en) * | 2018-12-21 | 2019-04-16 | 成都赛特防水材料有限责任公司 | A kind of slow expansion type water-swelling rubber water bar and its mixer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2236513Y (en) * | 1995-08-04 | 1996-10-02 | 王宝文 | Rubber water sealing strip |
| CN1597830A (en) * | 2003-09-17 | 2005-03-23 | 李树奎 | Waterstop of nano material modified rubber |
| CN102851012A (en) * | 2012-09-19 | 2013-01-02 | 青岛开世密封工业有限公司 | Water swellable rubber in high-concentration salt solution and preparation method thereof |
-
2013
- 2013-03-28 CN CN201310104215.3A patent/CN103131062B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2236513Y (en) * | 1995-08-04 | 1996-10-02 | 王宝文 | Rubber water sealing strip |
| CN1597830A (en) * | 2003-09-17 | 2005-03-23 | 李树奎 | Waterstop of nano material modified rubber |
| CN102851012A (en) * | 2012-09-19 | 2013-01-02 | 青岛开世密封工业有限公司 | Water swellable rubber in high-concentration salt solution and preparation method thereof |
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| CN103131062A (en) | 2013-06-05 |
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