CN104926168A - Hydrophobic expanded perlite and preparation method thereof - Google Patents
Hydrophobic expanded perlite and preparation method thereof Download PDFInfo
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- CN104926168A CN104926168A CN201410101480.0A CN201410101480A CN104926168A CN 104926168 A CN104926168 A CN 104926168A CN 201410101480 A CN201410101480 A CN 201410101480A CN 104926168 A CN104926168 A CN 104926168A
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Abstract
The invention provides hydrophobic expanded perlite and a method for preparing the hydrophobic expanded perlite. The method comprises the following steps: (1) grading perlite ore and screening perlite with its expanding multiple K0 being greater than 10; (2) screening the perlite after grading; (3) preheating for dehydration in a preheating furnace of 100-600 DEG C after screening; (4) carrying out secondary grading after preheating for dehydration, and screening expanded perlite which has expanding multiple K0 being greater than 20 and refractive index being less than 2 and has glassy luster or resinous luster, so as to obtain expanded perlite with its density being less than 80kg/m<3>; and (5) carrying out water repellent treatment on the expanded perlite so as to obtain the hydrophobic expanded perlite. The method provided by the invention is simple to operate and convenient to popularize. The hydrophobic expanded perlite prepared by the above method has a good hydrophobic effect, and 24-hour water absorption of the hydrophobic expanded perlite is controlled below 8.3%. The hydrophobic expanded perlite can better meet the high-performance requirement of existing building materials.
Description
Technical field
The present invention relates to building material technical field, be specifically related to a kind of hydrophobic expansion pearlite and preparation method thereof.
Background technology
Along with the fast development of national economy, improving constantly of living standards of the people, also increasing to the consumption of the energy, in the total energy consumption of China, building energy consumption is one of main aspect of China's energy consumption.According to relevant report, it is highly energy-consuming building that China increases major part in house architectural area every year newly, and existing building nearly 90% is high energy consumption building.Buildings annual power consumption in the whole nation accounts for more than 20% of China's generated energy, and unit floor area of building power consumption is the several times of developed country.Wherein major cause is that China's building heat preservation function imperfection backwardness relative to correlation technique causes.
In order to energy-saving and emission-reduction, reduce building energy consumption, method the most general at present installs heat insulation layer additional at exterior wall.What existing lagging material adopted mostly is low density loose porous material, because inner air of filling and close plays very large barrier effect to the convection current of heat and conduction, thus realizes the effect of heat insulating.
The mainly organic insulation material that China's present stage uses, as: polystyrene block EPS, extruded polystyrene board XPS, granular polystyrene, spraying polyurethane SPU and polyurethane PU hard bubble.Organic insulation material has lightweight, good effect of heat insulation, easy construction feature.But existing organic insulation material also has its unavoidable shortcoming: inflammable, although the fire resistance that existing relevant art improves organic materials reaches flame retardant effect, but when the intensity of a fire is larger, fire-retardant finish material still can be lighted, some material also may produce a large amount of toxic smog, increases escape personnel when fire occurs and dies like a rat or damped possibility.In addition organic materials be heated in a fire after mechanical property reduce rapidly and also may increase its risk come off, cause unnecessary loss.And inorganic heat insulation material does not just exist such shortcoming, its fire resistance rating is A1 level, does not burn, is not fuming and Heat stability is good, also can not lose intensity because of high temperature.
Therefore, from overall situation and the people life property safety of building energy conservation, substitute with outstanding inorganic heat insulation material the problem that organic insulation material becomes extremely urgent.
Inorganic heat insulation material is based on rock wool, pearlstone, they have acid and alkali-resistance, corrosion-resistant, stability is high, easy construction, applied widely, be applicable to the insulation of various body of wall basic unit material and the complicated body of wall of different shape, the most important thing is that its fire protection flame retarding security is good, other require strict place to fire-protection rating can be widely used in intensive house, public building, large-scale public place, combustible and explosive area etc.But the insulation of existing inorganic heat insulation material is relative with hydrophobicity performance poor, and resistance to compression, folding strength are not high, constrain its development.
Therefore, a kind of alternative organic insulation material is researched and developed and the good lagging material that do not fire of water resistance becomes the current practical problems needing solution badly.
Summary of the invention
In order to solve the problem of lagging material water tolerance, the object of this invention is to provide a kind of novel hydrophobic expansion pearlite and preparation method thereof.
Concrete scheme of the present invention is as follows:
Prepare a method for hydrophobic expansion pearlite, it comprises the steps:
(1) by perlite ore classification, the perlite that screening expansion multiple K0 is greater than 10;
(2) sub-sieve is carried out to the perlite after classification;
(3) preheating dehydration in 100 DEG C ~ 600 DEG C preheating ovens after sub-sieve;
(4) carry out secondary grading after preheating dehydration, screening expansion multiple K0 is greater than 20, refractive index is less than 2, has the perlite of vitreous luster or resinous luster, obtain density and be less than 80kg/m
3pearlstone;
(5) subsequently WATER REPELLENT is carried out to pearlstone, obtain hydrophobic expansion pearlite.
Preferably, the screen number of described sub-sieve is less than 20 orders, is more preferably 5 orders.
Preferably, in described WATER REPELLENT, water-resisting agent used is silicone based water-resisting agent.
Preferably, described water-resisting agent also comprised dilution process before processing pearlstone, and described thinner is water and gel, and wherein, described gel accounts for 1 ~ 5% of thinner weight, and the multiple of dilution is 1 ~ 20 times.
Preferably, the weight part ratio 0.5 ~ 8:1 of silicone based water-resisting agent and pearlstone after described dilution.
Further, the invention provides hydrophobic expansion pearlite prepared by aforesaid method.
Beneficial effect of the present invention is as follows:
Method provided by the invention is simple to operate, is convenient to promote, and the hydrophobic expansion pearlite hydrophobic effect utilizing method of the present invention to obtain is good, and its 24h water-intake rate controls below 8.3%, can better meet the high performance requirements of existing building material.
Embodiment
Below in conjunction with specific embodiment, concrete technical scheme of the present invention is specifically described.
The invention provides a kind of method preparing hydrophobic expansion pearlite, it comprises the steps:
(1) by perlite ore classification, the perlite that screening expansion multiple K0 is greater than 10, this perlite take off glass not serious, containing crystalline material, accidental fluxion structure;
(2) sub-sieve is carried out to the perlite after classification; The screen number of described sub-sieve is less than 20 orders, is more preferably 5 orders.
(3) preheating dehydration in 100 DEG C ~ 600 DEG C preheating ovens after sub-sieve;
(4) carry out secondary grading after preheating dehydration, screening expansion multiple K0 is greater than 20, refractive index is less than 2, has the perlite of vitreous luster or resinous luster, obtain density and be less than 80kg/m
3pearlstone;
(5) subsequently WATER REPELLENT is carried out to pearlstone, obtain hydrophobic expansion pearlite.
Wherein, in described WATER REPELLENT, water-resisting agent used is silicone based water-resisting agent.Described silicone based water-resisting agent is a kind of silylation powder water-repellent additive, and this product not only shows high hydrophobic usefulness, and has the ability of the quick uniform mixing with mortar.The combination that its silane is lasting with the hydrated product height of formation of cement under alkaline environment thus long-term hydrophobicity performance is provided.
Water-resisting agent described in the present invention also comprised dilution process before processing pearlstone, and described thinner is water and gel, and wherein, described gel accounts for 1 ~ 5% of thinner weight, and the multiple of dilution is 1 ~ 20 times.Preferably, described gelatinous material is the liquid gel that market can buy arbitrarily, as ferric hydroxide colloid.
Preferably, after described dilution, the weight part ratio of silicone based water-resisting agent and pearlstone is 0.5 ~ 8:1.
In the present embodiment, prepare 4 kinds of different ratios water-resisting agents (hydrophober) and surface treatment has been carried out to pearlstone, as shown in table 1.Treating processes is as follows, in proportion by gelling material and water-resisting agent, water mix evenly after, mixed solution and pearlstone are carried out mix, duration of mixing will control, and the time is too short, and the water-proof material be wrapped on perlite is few, do not reach waterproof and hydrophobic effect, overlong time, some perlites are damaged, affect the performance of goods.We test the water-resisting agent of four kinds of formulas, and test-results is in table 2.
The process of table 1 four kinds of water-resisting agents
Table 2 perlite hydrophobic effect test-results
As seen from Table 2,24 hours water-intake rates of untreated pearlstone reach 44.3%, the water-intake rate of hydrophobic expansion pearlite is after treatment 8.3% ~ 24.4%, wherein best one group is A group, its 24h water-intake rate only has 8.3%, for this reason, the research of ours below all have employed the water-resisting agent of A formula, can better meet the high performance requirements of existing building material.
The above is only the preferred embodiment of the present invention, it is to be noted, these embodiments are only not used in for illustration of the present invention and limit the scope of the invention, and, after having read content of the present invention, relevant technical staff in the field can make various change or amendment to the present invention, and these equivalent form of values fall into the application's appended claims limited range equally.
Claims (6)
1. prepare a method for hydrophobic expansion pearlite, it is characterized in that, it comprises the steps:
(1) by perlite ore classification, the perlite that screening expansion multiple K0 is greater than 10;
(2) sub-sieve is carried out to the perlite after classification;
(3) preheating dehydration in 100 DEG C ~ 600 DEG C preheating ovens after sub-sieve;
(4) carry out secondary grading after preheating dehydration, screening expansion multiple K0 is greater than 20, refractive index is less than 2, has the perlite of vitreous luster or resinous luster, obtain density and be less than 80kg/m
3pearlstone;
(5) subsequently WATER REPELLENT is carried out to pearlstone, obtain hydrophobic expansion pearlite.
2. method according to claim 1, is characterized in that, the screen number of described sub-sieve is less than 20 orders, is more preferably 5 orders.
3. method according to claim 1, is characterized in that, in described WATER REPELLENT, water-resisting agent used is silicone based water-resisting agent.
4. method according to claim 3, is characterized in that, described water-resisting agent also comprised dilution process before processing pearlstone, described thinner is water and gel, wherein, described gel accounts for 1 ~ 5% of thinner weight, and the multiple of dilution is 1 ~ 20 times.
5. method according to claim 3, is characterized in that, water-resisting agent silicone based after described dilution and the weight part ratio of pearlstone are 0.5 ~ 8:1.
6. the hydrophobic expansion pearlite that described in Claims 1 to 4 any one prepared by method.
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| CN201410101480.0A CN104926168B (en) | 2014-03-18 | 2014-03-18 | A kind of hydrophobic expansion pearlite and preparation method thereof |
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| CN201410101480.0A CN104926168B (en) | 2014-03-18 | 2014-03-18 | A kind of hydrophobic expansion pearlite and preparation method thereof |
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| CN104926168A true CN104926168A (en) | 2015-09-23 |
| CN104926168B CN104926168B (en) | 2017-08-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105948636A (en) * | 2016-04-28 | 2016-09-21 | 中晶工程材料（信阳）有限公司 | Polyacrylate enhanced modified expanded perlite thermal insulation board and production method thereof |
| CN107281782A (en) * | 2017-07-16 | 2017-10-24 | 兰州理工大学 | A kind of method of expanded perlite hydrophobically modified |
| CN108298850A (en) * | 2018-04-10 | 2018-07-20 | 佛山市三水万瑞达环保科技有限公司 | A kind of preparation method for the expanded perlite that surface hydrophobicity is modified |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105948636A (en) * | 2016-04-28 | 2016-09-21 | 中晶工程材料（信阳）有限公司 | Polyacrylate enhanced modified expanded perlite thermal insulation board and production method thereof |
| CN107281782A (en) * | 2017-07-16 | 2017-10-24 | 兰州理工大学 | A kind of method of expanded perlite hydrophobically modified |
| CN108298850A (en) * | 2018-04-10 | 2018-07-20 | 佛山市三水万瑞达环保科技有限公司 | A kind of preparation method for the expanded perlite that surface hydrophobicity is modified |
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| CN104926168B (en) | 2017-08-08 |
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Effective date of registration: 20180531 Address after: 222100 west side of Ocean Avenue, Ganyu Marine Economic Development Zone, Lianyungang, Jiangsu Patentee after: Huayi Building Materials Technology Co. Ltd. Address before: 222100 Jiangsu province Lianyungang city Ganyu County Gan Ma Town Da Gao Dian village. Co-patentee before: NENJIANG PERLITE INSULATION CO., LTD. Patentee before: LIANYUNGANG PERLITE INSULATION CO., LTD. |
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