CN113416443A - Shielding putty with adjustable fluidity, preparation method and application - Google Patents
Shielding putty with adjustable fluidity, preparation method and application Download PDFInfo
- Publication number
- CN113416443A CN113416443A CN202110885958.3A CN202110885958A CN113416443A CN 113416443 A CN113416443 A CN 113416443A CN 202110885958 A CN202110885958 A CN 202110885958A CN 113416443 A CN113416443 A CN 113416443A
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- Prior art keywords
- shielding
- fluidity
- putty
- adjustable
- filler
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- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000003085 diluting agent Substances 0.000 claims abstract description 29
- 125000003700 epoxy group Chemical group 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 239000000945 filler Substances 0.000 claims description 23
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 18
- 229910052580 B4C Inorganic materials 0.000 claims description 15
- -1 alicyclic amine Chemical class 0.000 claims description 15
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 15
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 12
- 239000003822 epoxy resin Substances 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 12
- 229920000647 polyepoxide Polymers 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 230000005251 gamma ray Effects 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000011049 filling Methods 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910000712 Boron steel Inorganic materials 0.000 description 1
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical compound OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/34—Filling pastes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a fluidity-adjustable shielding putty, a preparation method and application thereof. According to the invention, a certain amount of reactive diluent with an epoxy group is added into the shielding putty, the fluidity of the shielding putty is adjusted through the reactive diluent with the epoxy group, the pouring of different caulking structures is carried out, the use amount of the reactive diluent is reasonably adjusted according to the specific depth and width of the different caulking structures during use, the viscosity of the shielding putty is controlled within a reasonable range, and the shielding putty has good shielding performance and bonding strength on the premise of ensuring the filling in the caulking structures.
Description
Technical Field
The invention relates to the technical field of nuclear radiation protection, in particular to a fluidity-adjustable shielding putty, and a preparation method and application thereof.
Background
The commonly used shielding materials mainly comprise polyethylene, boron-containing polyethylene, boron steel, lead plates, lead-boron polyethylene and the like, and are usually installed on a structural support member around a radioactive source in a splicing mode, so that in order to solve the problem of gaps in the installation process of shielding plates and block penetrating radiation, the gaps are usually filled with shielding putty.
In the prior art, the shielding putty which takes epoxy resin as a matrix is generally adopted by a common casting process, the viscosity is fixed and cannot be adjusted, and the construction requirements under different gap structure conditions are difficult to meet on the basis of not influencing the performance of the shielding putty. For example, when the gap is narrow and deep, the fluidity of the shielding putty cannot be adjusted, so that the gap cannot be completely filled with the putty, the gap is not reserved, and the bonding performance of the gap is not influenced.
Disclosure of Invention
The invention aims to provide a fluidity-adjustable shielding putty, which solves the problem that gaps cannot be filled due to the fact that the fluidity of the conventional shielding putty is not adjustable, and has good shielding performance and bonding strength.
In addition, the invention also provides a preparation method and application of the fluidity-adjustable shielding putty.
The invention is realized by the following technical scheme:
the fluidity-adjustable shielding putty comprises a matrix, a neutron ray shielding filler, a gamma ray shielding filler, a curing agent and an active diluent with an epoxy group.
The existing shielding putty taking epoxy resin as a matrix adopts a common pouring process, the viscosity is fixed and can not be adjusted, and the construction requirements under different gap structure conditions are difficult to meet on the basis of not influencing the performance of the shielding putty.
According to the invention, a certain amount of reactive diluent with an epoxy group is added into the shielding putty, the fluidity of the shielding putty is adjusted through the reactive diluent with the epoxy group, the pouring of different caulking structures is carried out, the use amount of the reactive diluent is reasonably adjusted according to the specific depth and width of the different caulking structures during use, the viscosity of the shielding putty is controlled within a reasonable range, and the shielding putty has good shielding performance and bonding strength on the premise of ensuring the filling in the caulking structures.
Further, the paint comprises the following components in percentage by weight:
5-20 wt% of neutron ray shielding filler, 60-80 wt% of gamma ray shielding filler, 1-6 wt% of active diluent with epoxy group, and the balance of matrix and curing agent.
The invention ensures that the gap is completely filled by filling and does not leave gaps by reasonably designing the dosage ratio of each component of the shielding putty, and does not influence the bonding performance and the shielding performance of the shielding putty.
Further, the paint comprises the following components in percentage by weight:
14.60 wt% of matrix, 19.11 wt% of neutron ray shielding filler, 60 wt% of gamma ray shielding filler, 1.75 wt% of active diluent with epoxy group and 4.54 wt% of curing agent.
Further, the matrix is epoxy resin, and the curing agent is alicyclic amine curing agent.
The alicyclic amine curing agent refers to an amine curing agent with alicyclic ring, and is characterized by having alicyclic ring to ensure the high temperature resistance and high hydrogen content; the alicyclic amine curing agent has the advantage of high temperature resistance and does not influence the shielding performance of the shielding putty, and is obtained on the market.
Further, the neutron ray shielding filler includes at least one of aluminum hydroxide and boron carbide.
The aluminum hydroxide can play a role in flame retardance and hydrogen content adjustment; as long as guarantee under the prerequisite of shielding material like boron carbide, lead powder quantity, it is little to shielding effect influence, consequently, the quantity of rational design aluminium hydroxide and boron carbide not only can play fire-retardant effect, and can not influence the shielding effect that neutron ray shielded the filler.
Further, the particle size of the aluminum hydroxide is 15-40 um, and the particle size of the boron carbide is 20-40 um.
The aluminum hydroxide and the boron carbide are both small-particle-size fillers, and the high-density shielding material can be prevented from settling by adding the small-particle-size fillers.
Further, the gamma ray shielding filler is lead powder.
Further, the particle size of the lead powder is 600-800 meshes.
Because the lead powder has larger specific gravity, the lead powder is easy to be settled in organic matters, and the restriction of the lead powder with small grain size can prevent or weaken the settlement of the lead powder, so that the lead powder is uniformly dispersed in the organic matters.
A preparation method of shielding putty with adjustable fluidity comprises the following steps:
s1, adding the matrix and the reactive diluent with the epoxy group into a vacuum mixing system, and uniformly stirring;
s2, adding neutron ray shielding filler and gamma ray shielding filler, and stirring uniformly under a vacuum condition;
and S2, adding a curing agent, and continuously stirring for 1-2h in vacuum to obtain the fluidity-adjustable shielding putty.
Furthermore, the vacuum degree in the stirring process is 1-2 Pa, and the stirring speed is 30-70 r/min.
The application of the shielding putty with adjustable fluidity comprises the following steps of applying the shielding putty to joint filling of different gap structures:
when the width of the gap structure is certain, the amount of the active diluent in the fluidity-adjustable shielding putty is increased along with the increase of the depth of the gap structure, so that the viscosity of the fluidity-adjustable shielding putty is reduced.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the fluidity-adjustable shielding putty can adjust the viscosity of the shielding putty by adjusting the using amount of the active diluent, realizes fluidity adjustment, and is suitable for the construction requirements of different caulking structures.
2. The shielding putty prepared by the method disclosed by the invention is adjustable in fluidity and has good shielding performance and bonding strength.
3. The invention has the characteristics of short surface drying and actual drying time, low shrinkage rate, high bonding strength and excellent gamma, thermal neutron and fast neutron shielding performance, and can ensure the radiation safety of equipment and personnel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.
In the following examples, the reactive diluent with epoxy groups is a mixture of three substances:
example 1:
the shielding putty with adjustable fluidity comprises the following components in percentage by weight:
14.60 wt% of epoxy resin, 14 wt% of aluminum hydroxide, 5.11 wt% of boron carbide, 60 wt% of lead powder, 1.75 wt% of active diluent with epoxy groups and 4.54 wt% of alicyclic amine curing agent.
The preparation process of this example is as follows:
adding the epoxy resin and the reactive diluent into a mixer according to the weight ratio, and stirring at the speed of 30r/min for 10min to obtain a component A; adding lead powder, aluminum hydroxide and boron carbide into a stirrer, stirring at the speed of 30r/min for 15min, and uniformly mixing to obtain the component B. A, B, stirring at 30r/min for 20min, adding C (alicyclic amine curing agent) after mixing uniformly, and continuing stirring at 70r/min for 60 min.
Comparative example 1:
the shielding putty with adjustable fluidity comprises the following components in percentage by weight:
16.35 percent by weight of epoxy resin, 14 percent by weight of aluminum hydroxide, 5.11 percent by weight of boron carbide, 60 percent by weight of lead powder and 4.54 percent by weight of alicyclic amine curing agent.
Comparative example 2:
this comparative example is based on example 1 and differs from example 1 in that:
the reactive diluent with epoxy groups was replaced with an equivalent amount of glycidyl alcohol acid ether.
Example 2:
the shielding putty with adjustable fluidity comprises the following components in percentage by weight:
14.6 wt% of epoxy resin, 10 wt% of aluminum hydroxide, 9.11 wt% of boron carbide, 60 wt% of lead powder, 1.75 wt% of active diluent with epoxy groups and 4.54 wt% of alicyclic amine curing agent.
Example 3:
the shielding putty with adjustable fluidity comprises the following components in percentage by weight:
14.6 wt% of epoxy resin, 19.11 wt% of boron carbide, 60 wt% of lead powder, 1.75 wt% of active diluent with epoxy groups and 4.54 wt% of alicyclic amine curing agent.
Example 4:
the shielding putty with adjustable fluidity comprises the following components in percentage by weight:
14.6 wt% of epoxy resin, 4 wt% of aluminum hydroxide, 5.11 wt% of boron carbide, 70 wt% of lead powder, 1.75 wt% of active diluent with epoxy groups and 4.54 wt% of alicyclic amine curing agent.
Example 5:
the shielding putty with adjustable fluidity comprises the following components in percentage by weight:
9.10 wt% of epoxy resin, 5.11 wt% of boron carbide, 80 wt% of lead powder, 2.54 wt% of active diluent with epoxy groups and 3.25 wt% of alicyclic amine curing agent.
Example 6:
21.33 wt% of epoxy resin, 5.11 wt% of boron carbide, 60 wt% of lead powder, 5.97 wt% of active diluent with epoxy groups and 7.59 wt% of alicyclic amine curing agent.
The shielding putty was prepared according to the formulations of examples 1-6 and comparative examples 1-2. A series of related performance tests are carried out according to the national standard, and the test result shows that the prepared shielding putty has excellent performances. Specific indexes are shown in table 1:
TABLE 1
From the data in table 1, it can be seen that:
1. the shielding putty prepared by the invention has the characteristics of short surface drying and actual drying time, low shrinkage rate, high bonding strength and excellent gamma, thermal neutron and fast neutron shielding performance, and can ensure the radiation safety of equipment and personnel.
2. The invention adds the reactive diluent with epoxy groups, does not affect the performance of the shielding putty basically, but can adjust the fluidity of the shielding putty and carry out pouring of different joint filling structures.
3. Compared with other diluents, the reactive diluent with epoxy groups has higher bonding strength.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The fluidity-adjustable shielding putty comprises a matrix, a neutron ray shielding filler, a gamma ray shielding filler and a curing agent, and is characterized by also comprising an active diluent with an epoxy group.
2. The fluidity-adjustable shielding putty as claimed in claim 1, which is characterized by comprising the following components in percentage by weight:
5-20 wt% of neutron ray shielding filler, 60-80 wt% of gamma ray shielding filler, 1-6 wt% of active diluent with epoxy group, and the balance of matrix and curing agent.
3. The fluidity-adjustable shielding putty as claimed in claim 1, which is characterized by comprising the following components in percentage by weight:
14.60 wt% of matrix, 19.11 wt% of neutron ray shielding filler, 60 wt% of gamma ray shielding filler, 1.75 wt% of active diluent with epoxy group and 4.54 wt% of curing agent.
4. The fluidity-adjustable shielding putty as claimed in claim 1, wherein the matrix is epoxy resin, and the curing agent is alicyclic amine curing agent.
5. The fluidity-tunable shielding putty as set forth in claim 1, wherein the neutron ray shielding filler comprises at least one of aluminum hydroxide and boron carbide.
6. The fluidity-adjustable shielding putty as claimed in claim 5, wherein the particle size of the aluminum hydroxide is 15-40 um, and the particle size of the boron carbide is 20-40 um.
7. The fluidity-adjustable shielding putty as claimed in claim 1, wherein the gamma ray shielding filler is lead powder.
8. The fluidity-adjustable shielding putty as claimed in claim 7, wherein the particle size of the lead powder is 600-800 meshes.
9. The method for preparing shielding putty with adjustable fluidity as set forth in any one of claims 1 to 8, which comprises the following steps:
s1, adding the matrix and the reactive diluent with the epoxy group into a vacuum mixing system, and uniformly stirring;
s2, adding neutron ray shielding filler and gamma ray shielding filler, and stirring uniformly under a vacuum condition;
and S2, adding a curing agent, and continuously stirring for 1-2h in vacuum to obtain the fluidity-adjustable shielding putty.
10. The use of a fluidity-tunable shielding putty as claimed in any one of claims 1 to 8 characterised in that the shielding putty is used for caulking different gap structures:
when the width of the gap structure is certain, the amount of the active diluent in the fluidity-adjustable shielding putty is increased along with the increase of the depth of the gap structure, so that the viscosity of the fluidity-adjustable shielding putty is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110885958.3A CN113416443A (en) | 2021-08-03 | 2021-08-03 | Shielding putty with adjustable fluidity, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110885958.3A CN113416443A (en) | 2021-08-03 | 2021-08-03 | Shielding putty with adjustable fluidity, preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113416443A true CN113416443A (en) | 2021-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110885958.3A Pending CN113416443A (en) | 2021-08-03 | 2021-08-03 | Shielding putty with adjustable fluidity, preparation method and application |
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| Country | Link |
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| CN (1) | CN113416443A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131234A (en) * | 2011-11-23 | 2013-06-05 | 岳阳市顶盛涂装装饰工程有限公司 | Cracking-resistant joint putty ash |
| CN104710727A (en) * | 2015-03-27 | 2015-06-17 | 中国科学院长春应用化学研究所 | Epoxy resin based neutron and gamma ray shielding composite material, as well as preparation method and application thereof |
| CN108084769A (en) * | 2018-02-06 | 2018-05-29 | 中国船舶重工集团公司第七〇九研究所 | A kind of high-temperature-resistant shielding putty and preparation method thereof of anti-neutron, gamma |
-
2021
- 2021-08-03 CN CN202110885958.3A patent/CN113416443A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131234A (en) * | 2011-11-23 | 2013-06-05 | 岳阳市顶盛涂装装饰工程有限公司 | Cracking-resistant joint putty ash |
| CN104710727A (en) * | 2015-03-27 | 2015-06-17 | 中国科学院长春应用化学研究所 | Epoxy resin based neutron and gamma ray shielding composite material, as well as preparation method and application thereof |
| CN108084769A (en) * | 2018-02-06 | 2018-05-29 | 中国船舶重工集团公司第七〇九研究所 | A kind of high-temperature-resistant shielding putty and preparation method thereof of anti-neutron, gamma |
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Application publication date: 20210921 |
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