CN101531864B - High temperature resistant heat insulation coating and preparation method thereof - Google Patents
High temperature resistant heat insulation coating and preparation method thereof Download PDFInfo
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- CN101531864B CN101531864B CN2009100206605A CN200910020660A CN101531864B CN 101531864 B CN101531864 B CN 101531864B CN 2009100206605 A CN2009100206605 A CN 2009100206605A CN 200910020660 A CN200910020660 A CN 200910020660A CN 101531864 B CN101531864 B CN 101531864B
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Abstract
The invention provides a high temperature resistant heat insulation coating and a preparation method thereof. The coating comprises the following raw material compositions: 300 to 500 portions of hot setting resin, 300 to 400 portions of sodium titanate whisker or/and sodium trititanic whisker, 100 to 200 portions of hollow microsphere inorganic filling material, 100 to 200 portions of paint, 50 to 150 portions of high temperature resistant filling material, 200 to 300 portions of organic solvent, 10 to 50 portions of slagging medium, 1 to 3 portions of flatting agent, and 1 to 3 portions of dispersing agent. The whiskers, the hollow microsphere and the paint added in the coating have higher reflecting capability on infrared ray, the special structure of the coating makes the coating have double reflecting capabilities, which makes the coating has higher thermal reflectivity, can effectively reduce radiant heat transfer, and can be used for high temperature protection at 650 DEG C.
Description
Technical field
The present invention relates to a kind of high temperature resistant heat insulation coating and preparation method thereof.
Background technology
High temperature insulating mould coating can be applicable to the heat-resisting protective of equipment such as high temperature steam pipeline, High Temperature Furnaces Heating Apparatus, petroleum cracking device.Li Zhiqiang is a matrix with organosilicon inarch acrylic resin and Resins, epoxy; prepared a kind of high temperature resistant heat insulation coating by adding fillers such as asbestos powder, mica powder and aerosil; coating is incubated 15 minutes no changes down at 720 ℃; but can only use the short period of time; can be used for the short-term protection of hot environment; referring to " a kind of high temperature resistant heat insulation coating of ambient cure ", modern coating and application, (2006) 14-15.It is matrix by epoxy modified silicone resin, polyamide-based solidifying agent that Wang Baiya etc. have developed a kind of, with heat insulation and heat-resistant filler is the outer thermal protection coating system of room curing and high temperature resistant of additive, when coat-thickness is 0.8～0.9mm, behind 30S under 350 ℃ the temperature, coating back wall temperature is 60 ℃.This coating can be used 350 ℃ of following short-terms, referring to " a kind of spacecraft with outer thermal protection coating investigation of materials ", and solid-rocket technology, 28[3] (2004) 216-218.Zhang Zhuo etc. are filmogen with the epoxy resin modification silicone resin, have prepared a kind of thermal insulating coating, and this modified resin coating can be used between-40 ℃～200 ℃.Referring to " research of Composite Case External Surface sealing, heat-proof coating material ", aerospace material technology, [3] (2003) 25-28.Guo Yalin etc. have developed and have a kind ofly formed the ground high temperature resistant heat insulation coating by modifying epoxy resin by organosilicon self-vulcanizing system and heat-resisting and heat insulating function filler, and the short period of time, interior heatproof was not higher than 500 ℃, was used for the outer thermal protection of certain solid engines.Referring to " the outer thermal protective coating research of certain solid engines housing ", aerospace material technology, [3] (2003) 21-24.
Potassium titanate crystal whisker has low thermal conductivity and high infrared external reflection characteristic, can be used as paint filler.Chinese patent (application number 200610000111.8) discloses a kind of thermostable heat-isolating coating that contains potassium titanate crystal whisker, this coating is matrix with the silicone resin, be prepared from by adding preparations such as high temperature resistant type carbon black, glass powder with low melting point, hollow ceramic microballon, mica powder, potassium titanate crystal whisker, diatomite, can under 600 ℃ of conditions, use.
Summary of the invention
The present invention is a filler with the sodium titanate crystal whisker, and a kind of high temperature insulating mould coating and preparation method thereof that can be used for 650 ℃ Working environment is provided.
Summary of the invention
High temperature resistant heat insulation coating of the present invention is filmogen with the fire resistant resin, by adding fillers such as sodium titanate crystal whisker, hollow glass micropearl, mullite powder improving its resistance to elevated temperatures, and gives its excellent heat-proof quality.Technical characterstic of the present invention is to add the sodium hexatitanate whisker filler, still is two kinds of compound thermal insulating coatings that heat insulation mechanism comprehensively works simultaneously.
Detailed Description Of The Invention
Technical scheme of the present invention is as follows:
High temperature resistant heat insulation coating, feed composition is as follows:
300～500 parts of thermosetting resins; 300～400 parts of sodium titanate crystal whiskers, 100～200 parts of hollow beads inorganic fillers, 100～200 parts of pigment, 50～150 parts in high temperature resistant weighting material; 200～300 parts of organic solvents; 10～50 parts of fusing assistants; 1～3 part of flow agent; 1～3 part of dispersion agent.
The present invention selects for use thermosetting resin as the fire resistant resin filmogen, specifically is selected from one of silicone resin, epoxy modified silicone resin or silicone resin.
Described sodium titanate crystal whisker is a minute hand shape barred body, diameter 0.5～3 μ m, and length-to-diameter ratio is 20～50.
Described hollow beads inorganic filler is selected from the pearl that floats in hollow glass micropearl, hollow ceramic microspheres or the thermal power plant's flyash, all is the hollow sphere body structure, and the microballon particle size range is between 10～45 μ m.
Above raw material silicone resin, epoxy modified silicone resin and silicone resin float pearl in hollow glass micropearl, hollow ceramic microspheres or the thermal power plant's flyash, be this area conventional material, but market are buied.
Described sodium titanate crystal whisker can be by patent document " a kind of preparation method of sodium titanate crystal whisker ", publication number CN101275276A (200710115847.4) preparation.
Described pigment is selected from titanium dioxide, zinc oxide or barium sulfate.The preferred Rutile type Titanium Dioxide of titanium dioxide wherein.
Described high temperature resistant weighting material is white mica powder, lapis amiridis or mullite powder.
Described organic solvent is one or more in toluene, dimethylbenzene, the butylacetate.。
Described fusing assistant is red lead or borax.
Described flow agent is selected from Levaslip836 or Levaslip837, and the chemical company limited of moral modest (Shanghai) produces and sells.
Described dispersion agent is selected from Disponer904s or Disponer912, and the chemical company limited of moral modest (Shanghai) produces and sells.
The preparation method of high temperature resistant heat insulation coating of the present invention, step is as follows:
(1) gets heat stable resin and organic solvent in proportion,, stir the two thorough mixing;
(2) get sodium titanate crystal whisker, pigment, high temperature resistant weighting material and fusing assistant in proportion and mix, the mixed solution mixing sand milling 30-40min that makes with step 1 obtains mixed slurry then;
(3) get the hollow beads inorganic filler in proportion, add in the mixed slurry that step (2) makes, add flow agent again, dispersion agent mixes.
Excellent results of the present invention is as follows:
1, the present invention prepares high temperature resistant heat insulation coating by adding sodium titanate crystal whisker, and for potassium titanate crystal whisker, sodium titanate crystal whisker has better heat-blocking action and price advantage.
2, high-temperature resistant coating of the present invention is a kind of compound thermal insulating coating, the present invention added on the one hand whisker, hollow microsphere have very low thermal conductivity, so shunting when hot-fluid runs into the two, will occur, make that the bang path of hot-fluid in coating is elongated and complicated, cause the heat transfer property of matrix material to descend, can effectively intercept heat transfer by conduction; Whisker that the present invention on the other hand added and pigment have very high reflection potential to infrared rays, the hollow beads that the present invention added simultaneously also has higher infrared external reflection ability, and because its special structure makes it have the double reflection ability, this makes coating have higher heat reflectivity, can effectively reduce radiative transfer.
3, high-temperature resistant coating of the present invention can be used for 650 ℃ high temperature protection.When heat source temperature is 650 ℃, when paint coatings thickness was 1mm, coating back of the body temperature can be reduced to 220 ℃.
Embodiment
The invention will be further described below in conjunction with embodiment.Raw material sources among the embodiment:
Silicone resin: the chemical company limited of moral modest (Shanghai) sells model SN-660.
Silicone resin: Kang Gu good Chemical Industry Science Co., Ltd in Guangzhou produces and sells translucent liquid, relative density (25 ℃) 0.890～0.920, viscosity (S is coated with 4 glasss, 25 ℃) 11～14, pH value 4.0～7.0.
Epoxy modified silicone resin: the four seas, Zaoyang City, Hubei Province chemical industry company limited sells model SH-023.
Zinc oxide: Laiwu Imtech difficult to understand sells.
Hollow glass micropearl and hollow ceramic microspheres: it is on sale to prolong limit win-win environmentfriendly products company limited.
Sodium hexatitanate whisker and sodium trititanate whisker: can be by CN101275276A (200710115847.4) " a kind of preparation method of sodium titanate crystal whisker " preparation, whisker is a minute hand shape barred body, length-to-diameter ratio is 20～30.
Flow agent Levaslip837, Levaslip836: the chemical company limited of moral modest (Shanghai) sells.
Dispersion agent Disponer912, Disponer904s: the chemical company limited of moral modest (Shanghai) sells.
Embodiment 1: a kind of preparation method of high temperature resistant heat insulation coating, and concrete steps are as follows:
1, gets the dimethylbenzene of 380 parts of silicone resins and 270 parts,, stir the two thorough mixing;
2, get 260 parts of sodium hexatitanate whiskers, 120 parts of Rutile type Titanium Dioxides, 120 parts of mullites and 30 parts of boraxs, the mixed solution mixing sand milling 30min that makes with step 1 obtains slurry then;
3, get 120 parts of hollow glass micropearls, add in the mixed slurry that step 2 makes, add 1 part of flow agent Levaslip837 again, 1 part of dispersion agent Disponer912 mixes.
Embodiment 2: a kind of preparation method of high temperature resistant heat insulation coating, and concrete steps are as follows:
1, gets the dimethylbenzene of 380 parts of epoxy modified silicone resins and 300 parts,, stir the two thorough mixing;
2, get 280 parts of sodium hexatitanate whiskers, 120 parts of Rutile type Titanium Dioxides, 80 parts of mullites and 30 parts of boraxs, the mixed solution mixing sand milling 30min that makes with step 1 obtains slurry then;
3, get 130 parts of hollow ceramic microspheres, add in the mixed slurry that step 2 makes, add 1 part of flow agent Levaslip837 again, 1 part of dispersion agent Disponer912 mixes.
Embodiment 3: a kind of preparation method of high temperature resistant heat insulation coating, and concrete steps are as follows:
1, gets the dimethylbenzene of 380 parts of silicone resins and 270 parts,, stir the two thorough mixing;
2, get 260 parts of sodium hexatitanate whiskers, 60 parts of sodium trititanate whiskers, 120 parts of zinc oxide, 60 parts of mullites and 30 parts of boraxs, the mixed solution mixing sand milling 30min that makes with step 1 obtains slurry then;
3, get 120 parts of hollow glass micropearls, add in the mixed slurry that step 2 makes, add 1 part of flow agent Levaslip836 again, 1 part of dispersion agent Disponer904s mixes.
The relevant performance test data such as the following table of the high temperature resistant heat insulation coating of above embodiment 1-3:
| Test item | Embodiment 1 | Embodiment 2 | Embodiment 3 | Detection method |
| Coating appearance | White | White | White | Range estimation |
| Sticking power/level | ?1 | 1 | ?1 | GB?1720-79 |
| Snappiness/mm | ?1 | 1 | ?1 | GB/T?1731-93 |
| Shock resistance/cm | ?50 | 50 | ?40 | GB/T?1732-93 |
| Surface drying time/min | ?75 | 80 | ?100 | GB/T?1728-79 |
| Do solid work time/h | ?19 | 22 | ?24 | GB/T?1728-79 |
| Heat resisting temperature/℃ | 650 | 600 | 600 | |
| Heat-proof quality | When heat source temperature is 650 ℃, when paint coatings thickness was 1mm, coating back of the body temperature can be reduced to 220 ℃. | When heat source temperature is 600 ℃, when paint coatings thickness was 1mm, coating back of the body temperature can be reduced to 209 ℃. | When heat source temperature is 600 ℃, when paint coatings thickness was 1mm, coating back of the body temperature can be reduced to 211 ℃. |
Claims (9)
1. high temperature resistant heat insulation coating is characterized in that, feed composition is as follows:
300～500 parts of thermosetting resins; Sodium hexatitanate whisker is or/and 300～400 parts of sodium trititanate whiskers, 100～200 parts of hollow beads inorganic fillers, 100～200 parts of pigment, 50～150 parts in high temperature resistant weighting material; 200～300 parts of organic solvents; 10～50 parts of fusing assistants; 1～3 part of flow agent; 1～3 part of dispersion agent;
Described thermosetting resin is selected from one of silicone resin, epoxy modified silicone resin or silicone resin.
2. high temperature insulating mould coating as claimed in claim 1 is characterized in that, described sodium hexatitanate whisker and sodium trititanate whisker are minute hand shape barred body, and length-to-diameter ratio is 20～30.
3. high temperature insulating mould coating as claimed in claim 1, it is characterized in that, described hollow beads inorganic filler is selected from the pearl that floats in hollow glass micropearl, hollow ceramic microspheres or the thermal power plant's flyash, is the hollow sphere body structure, and the microballon particle size range is between 10～45 μ m.
4. high temperature insulating mould coating as claimed in claim 1 is characterized in that described pigment is selected from titanium dioxide, zinc oxide or barium sulfate.
5. high temperature insulating mould coating as claimed in claim 1 is characterized in that, described high temperature resistant weighting material is white mica powder, lapis amiridis or mullite powder.
6. high temperature insulating mould coating as claimed in claim 1 is characterized in that, described organic solvent is one or more in toluene, dimethylbenzene, the butylacetate.
7. high temperature insulating mould coating as claimed in claim 1 is characterized in that, described fusing assistant is red lead or borax.
8. high temperature insulating mould coating as claimed in claim 1 is characterized in that described flow agent is selected from Levaslip836 or Levaslip837, and described dispersion agent is selected from Disponer904s or Disponer912.
9. the preparation method of the described high temperature resistant heat insulation coating of claim 1, step is as follows:
(1) heat-obtaining thermosetting resin and organic solvent in proportion with the two thorough mixing, stir;
(2) get sodium hexatitanate whisker in proportion or/and sodium trititanate whisker, pigment, high temperature resistant weighting material and fusing assistant mix, the mixed solution mixing sand milling 30-40min that makes with step (1) obtains mixed slurry then;
(3) get the hollow beads inorganic filler in proportion, add in the mixed slurry that step (2) makes, add flow agent again, dispersion agent mixes.
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| CN2009100206605A CN101531864B (en) | 2009-04-16 | 2009-04-16 | High temperature resistant heat insulation coating and preparation method thereof |
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| CN2009100206605A CN101531864B (en) | 2009-04-16 | 2009-04-16 | High temperature resistant heat insulation coating and preparation method thereof |
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| CN101531864A CN101531864A (en) | 2009-09-16 |
| CN101531864B true CN101531864B (en) | 2011-05-11 |
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| CN101358047A (en) * | 2008-09-22 | 2009-02-04 | 曾庆衿 | Nano modified high-efficient heat insulation coatings |
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