CN103645283A - Method for detecting performances including mechanical stability and the like of emulsion - Google Patents
Method for detecting performances including mechanical stability and the like of emulsion Download PDFInfo
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- CN103645283A CN103645283A CN201310626319.0A CN201310626319A CN103645283A CN 103645283 A CN103645283 A CN 103645283A CN 201310626319 A CN201310626319 A CN 201310626319A CN 103645283 A CN103645283 A CN 103645283A
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Abstract
The invention relates to a method for detecting performances including the mechanical stability and the like of emulsion. The method comprises the following steps: (1) placing the emulsion to be detected into a dispersion cylinder; (2) starting a dispersion machine and regulating a rotary speed to 700-900r/min; sequentially adding a dispersant, a wetting agent, a de-foaming agent and ground calcium carbonate into the dispersion cylinder under the rotary speed and increasing the rotary speed of the dispersion machine to 2000-2500r/min; dispersing for 10-20 minutes; (3) adding an auxiliary film forming agent and continuously dispersing for 10-15 minutes; and (4) observing a system obtained by dispersion, wherein if the system is not gelled, the mechanical stability, the calcium ion stability and the heat resistance of the emulsion to be detected are good; if the system is gelled, the mechanical stability, the calcium ion stability and the heat resistance of the emulsion to be detected are poor. In all the steps, all raw materials for detection are as follows in parts by weight: 190-210 parts of the emulsion to be detected, 5.0-6.0 parts of the dispersant, 1-1.5 parts of the wetting agent, 1.5-2.5 parts of the de-foaming agent, 400-450 parts of the ground calcium carbonate and 15-20 parts of the film-forming auxiliary agent. According to the method, not only can the mechanical stability of the emulsion be detected rapidly and conveniently, but also the calcium ion stability and the heat resistance of the emulsion can also be detected.
Description
Technical field
The present invention relates to building coating quality testing field, particularly a kind of method that detects the performances such as mechanical stability of emulsion.
Background technology
Emulsion is a kind of colloid, and its colloidal state in a kind of stable existence is destroyed but this state is easy to, such as soda acid, temperature, strong shearing force, concentration etc. all can be destroyed it.
The stability of emulsion refers generally to mechanical stability, Calcium ion stability.Mechanical stability refers to the stability of emulsion when standing mechanically actuated, because in preparing coating process, and the operations such as spraying that be when pumping, stirring and application, so emulsion and coating thereof will hold out against mechanically actuated.Calcium ion stability refers to freeze thaw stability, refer to the stability of emulsion to the chemicals adding, because in preparing coating process, in order to play filling effect and to reduce costs, generally can add the thing of inorganic salts, so emulsion and coating thereof to detect Calcium ion stability.
Existing detection method is first sample to be filtered with 200 mesh filter screens; Then in stirring machine, use 1500-3000 rotating speed, strong stirring 5-10 minute, then filter with 200 mesh filter screens, weigh the dry residue on filter screen; Without any residue, be best.This detection method does not explicitly point out specification and the collocation of specification ratio thereof of blade of stirrer, a mixing bowl; Do not consider that emulsion also can be subject to powder or sand to grind strong shearing force and the heat producing after being mixed with coating yet.
Along with people's living standard constantly improves, the color of coating is required also to emerge in an endless stream, the mechanical stability that emulsion is made into after coating is also more and more paid attention to; Particularly true mineral varnish and texture coating, the sand ratio in its formula generally accounts for 60% in whole formula, even more; During dispersion, requiring to disperse the diameter of cylinder is dispersion impeller 1.5-2 times (otherwise being difficult for making true mineral varnish and texture coating to disperse), more easily produces heat, and this not only requires emulsion to have fine mechanical stability, also will have good thermotolerance; The performances such as the mechanical stability of emulsion are the important indicators that engineers component design is considered, therefore in the urgent need to a kind of detection method of the performances such as mechanical stability that can fast detecting emulsion.
Summary of the invention
In order to solve the existing the problems referred to above of prior art, the invention provides a kind of method that detects the performances such as mechanical stability of emulsion, the method not only can detect the mechanical stability of emulsion quickly and easily, and the calcium that can attach detection emulsion is from stability and thermotolerance.
Technical solution of the present invention is as follows:
A method that detects the performances such as mechanical stability of emulsion, is characterized in that: it comprises following step of sequentially carrying out:
1. first emulsion to be measured is placed in and disperses cylinder;
2. then open dispersion machine, turn speed to 700-900r/min, under this rotating speed, spreading agent, wetting agent, defoamer and coarse whiting are added successively and disperse after cylinder, improve dispersing speed to 2000-2500r/min, disperse 10-20min;
3. after, add coalescents, continue to disperse 10-15min;
4. observe the system that dispersion obtains, if system does not have gel, mechanical stability, Calcium ion stability and the good heat resistance of emulsion to be measured is described; If system gel, illustrates mechanical stability, Calcium ion stability and the poor heat resistance of emulsion to be measured;
In above steps, each weight proportion that detects raw material is as follows: emulsion 190-210 part to be measured, spreading agent 5.0-6.0 part, wetting agent 1-1.5 part, defoamer 1.5-2.5 part, coarse whiting 400-450 part, coalescents 15-20 part.
Detection principle of the present invention is as follows: when the present invention utilizes dispersion impeller, dispersion cylinder, coarse whiting to destroy the stability of emulsion under strong shearing force, add coalescents; Make emulsion accept coalescents under instability state, if system gel illustrates emulsion mechanical stability and Calcium ion stability, poor heat resistance; If system does not have gel, emulsion mechanical stability and Calcium ion stability, good heat resistance are described.
Compared to prior art, the present invention has the following advantages: the method for the performances such as mechanical stability of detection emulsion of the present invention not only can detect the mechanical stability of emulsion, and the calcium that can attach detection emulsion is from stability and thermotolerance, in addition whether that is joined, can also to assess spreading agent and wetting agent and emulsion.
Embodiment
Below in conjunction with embodiment, embodiment, content of the present invention is elaborated:
(1) embodiment
The specific embodiment of the present invention provides a kind of method that detects the performances such as mechanical stability of emulsion, and it comprises following step of sequentially carrying out:
1. first emulsion to be measured is placed in and disperses cylinder;
2. then open dispersion machine, turn speed to 700-900r/min, under this rotating speed, spreading agent, wetting agent, defoamer and coarse whiting are added successively and disperse after cylinder, improve dispersing speed to 2000-2500r/min, disperse 10-20min;
3. after, add coalescents, continue to disperse 10-15min;
4. observe the system that dispersion obtains, if system does not have gel, mechanical stability, Calcium ion stability and the good heat resistance of emulsion to be measured is described; If system gel, illustrates mechanical stability, Calcium ion stability and the poor heat resistance of emulsion to be measured;
In above steps, each weight proportion that detects raw material is as follows: emulsion 190-210 part to be measured, spreading agent 5.0-6.0 part, wetting agent 1-1.5 part, defoamer 1.5-2.5 part, coarse whiting 400-450 part, coalescents 15-20 part.
In above-mentioned steps, dispersion machine is selected can sand milling, the multiple purpose aeroplane of dispersion and stirring, power 550W, rotating speed 0-7500r/min, voltage 220V, frequency 50HZ; The diameter that disperses cylinder preferably dispersion impeller 1.5-2 doubly, system more easily produces heat when high speed dispersion like this; For example: while disperseing cylinder diameter to be 10cm, dispersion impeller diameter should select 6.2cm.
Spreading agent and wetting agent: help system is disperseed, wetting powder.
Defoamer: help, prevent system because high speed dispersion produces a large amount of steam bubbles.
Coarse whiting: help system is ground, and the stability of surveying emulsion calcium ion at higher temperature is provided.
Coalescents: the strong shearing force system that emulsion is subject to powder, dispersion impeller produces heat, after detection system temperature raises whether because adding gel after coalescents.
(2) embodiment
Embodiment 1
Get two known latex A and B, A emulsion is mechanical stability, the poor emulsion of Calcium ion stability, the emulsion that B emulsion is mechanical stability, Calcium ion stability is good; By following methods of the present invention, detect respectively;
Comprise following step of sequentially carrying out:
1. first 190 parts of emulsions to be measured are placed in and disperse cylinder;
2. then open dispersion machine, turn speed to 700r/min, under this rotating speed, 5.0 parts of spreading agents, 1 part of wetting agent, 1.5 parts of defoamers and 400 parts of coarse whitings are added successively and disperseed after cylinder, improve dispersing speed to 2000r/min, disperse 20min;
3. after, add 15 parts of coalescents, continue to disperse 15min;
4. observe the system that dispersion obtains, if system does not have gel, mechanical stability, Calcium ion stability and the good heat resistance of emulsion to be measured is described; If system gel, illustrates mechanical stability, Calcium ion stability and the poor heat resistance of emulsion to be measured;
By method testing result of the present invention, be to obtain system gel by A emulsion, A emulsion mechanical stability, Calcium ion stability and poor heat resistance are described; By B emulsion acquisition system, there is no gel, B emulsion mechanical stability, Calcium ion stability and good heat resistance are described.
Embodiment 2
Get two known latex A and B, A emulsion is mechanical stability, the poor emulsion of Calcium ion stability, the emulsion that B emulsion is mechanical stability, Calcium ion stability is good; By following methods of the present invention, detect respectively;
Comprise following step of sequentially carrying out:
1. first 200 parts of emulsions to be measured are placed in and disperse cylinder;
2. then open dispersion machine, turn speed to 800r/min, under this rotating speed, 5.5 parts of spreading agents, 1.2 parts of wetting agents, 2 parts of defoamers and 430 parts of coarse whitings are added successively and disperseed after cylinder, improve dispersing speed to 2200r/min, disperse 15min;
3. after, add 18 parts of coalescents, continue to disperse 12min;
4. observe the system that dispersion obtains, if system does not have gel, mechanical stability, Calcium ion stability and the good heat resistance of emulsion to be measured is described; If system gel, illustrates mechanical stability, Calcium ion stability and the poor heat resistance of emulsion to be measured;
By method testing result of the present invention, be to obtain system gel by A emulsion, A emulsion mechanical stability, Calcium ion stability and poor heat resistance are described; By B emulsion acquisition system, there is no gel, B emulsion mechanical stability, Calcium ion stability and good heat resistance are described.
Embodiment 3
Get two known latex A and B, A emulsion is mechanical stability, the poor emulsion of Calcium ion stability, the emulsion that B emulsion is mechanical stability, Calcium ion stability is good; By following methods of the present invention, detect respectively;
Comprise following step of sequentially carrying out:
1. first 210 parts of emulsions to be measured are placed in and disperse cylinder;
2. then open dispersion machine, turn speed to 900r/min, under this rotating speed, 6.0 parts of spreading agents, 1.5 parts of wetting agents, 2.5 parts of defoamers and 450 parts of coarse whitings are added successively and disperseed after cylinder, improve dispersing speed to 2500r/min, disperse 10min;
3. after, add 20 parts of coalescents, continue to disperse 10min;
4. observe the system that dispersion obtains, if system does not have gel, mechanical stability, Calcium ion stability and the good heat resistance of emulsion to be measured is described; If system gel, illustrates mechanical stability, Calcium ion stability and the poor heat resistance of emulsion to be measured;
By method testing result of the present invention, be to obtain system gel by A emulsion, A emulsion mechanical stability, Calcium ion stability and poor heat resistance are described; By B emulsion acquisition system, there is no gel, B emulsion mechanical stability, Calcium ion stability and good heat resistance are described.
The method of above-described embodiment 1-embodiment 3 not only can detect the mechanical stability of emulsion, can also attach detect emulsion calcium from stability and thermotolerance, but also can assess spreading agent and wetting agent and emulsion, whether that is joined.
Above-mentioned embodiment is just explained in detail technical scheme of the present invention; the present invention has more than and is only confined to above-described embodiment; those skilled in the art should be understood that; the above-mentioned principle of every foundation and the improvement of spirit on basis of the present invention, substitute, all should be within protection scope of the present invention.
Claims (1)
1. a method that detects the performances such as mechanical stability of emulsion, is characterized in that: it comprises following step of sequentially carrying out:
1. first emulsion to be measured is placed in and disperses cylinder;
2. then open dispersion machine, turn speed to 700-900r/min, under this rotating speed, spreading agent, wetting agent, defoamer and coarse whiting are added successively and disperse after cylinder, improve dispersing speed to 2000-2500r/min, disperse 10-20min;
3. after, add coalescents, continue to disperse 10-15min;
4. observe the system that dispersion obtains, if system does not have gel, mechanical stability, Calcium ion stability and the good heat resistance of emulsion to be measured is described; If system gel, illustrates mechanical stability, Calcium ion stability and the poor heat resistance of emulsion to be measured;
In above steps, each weight proportion that detects raw material is as follows: emulsion 190-210 part to be measured, spreading agent 5.0-6.0 part, wetting agent 1-1.5 part, defoamer 1.5-2.5 part, coarse whiting 400-450 part, coalescents 15-20 part.
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| CN201310626319.0A CN103645283B (en) | 2013-11-29 | 2013-11-29 | The method of the mechanical stability of detection emulsion |
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| CN201310626319.0A CN103645283B (en) | 2013-11-29 | 2013-11-29 | The method of the mechanical stability of detection emulsion |
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| CN103645283B CN103645283B (en) | 2016-06-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990829A (en) * | 2015-06-15 | 2015-10-21 | 江苏奥莱特新材料有限公司 | Method for detecting stability of supernatant liquid accelerating agent |
| CN106018209A (en) * | 2016-08-03 | 2016-10-12 | 广东科德环保科技股份有限公司 | Cathode electrophoresis emulsion storage stability rapid detection method |
| CN111289687A (en) * | 2018-12-06 | 2020-06-16 | 宝辰联合(廊坊)科技有限公司 | Method for adjusting and testing alkali resistance of polymer emulsion for architectural coating and adhesive for architectural coating |
-
2013
- 2013-11-29 CN CN201310626319.0A patent/CN103645283B/en active Active
Non-Patent Citations (4)
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| 刘伟等: "WPU/ WEP 共混乳液稳定性研究", 《武汉科技学院学报》, vol. 22, no. 6, 5 November 2009 (2009-11-05), pages 1 - 3 * |
| 张心亚等: "乳液聚合中乳化剂对聚合物乳液稳定性的影响", 《粘接》, vol. 23, no. 3, 20 June 2002 (2002-06-20), pages 16 - 18 * |
| 李东光: "《涂料配方与生产（六）》", 30 April 2012, article "文物保护用面漆", pages: 269-271 * |
| 王倩等: "有机硅改性丙烯酸乳液性能的研究", 《中国胶粘》, vol. 12, no. 2, 30 March 2003 (2003-03-30), pages 5 - 7 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990829A (en) * | 2015-06-15 | 2015-10-21 | 江苏奥莱特新材料有限公司 | Method for detecting stability of supernatant liquid accelerating agent |
| CN106018209A (en) * | 2016-08-03 | 2016-10-12 | 广东科德环保科技股份有限公司 | Cathode electrophoresis emulsion storage stability rapid detection method |
| CN111289687A (en) * | 2018-12-06 | 2020-06-16 | 宝辰联合(廊坊)科技有限公司 | Method for adjusting and testing alkali resistance of polymer emulsion for architectural coating and adhesive for architectural coating |
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| CN103645283B (en) | 2016-06-22 |
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