CN1055726A - Moisture-absorption and halogenation resistant magnesia cement - Google Patents
Moisture-absorption and halogenation resistant magnesia cement Download PDFInfo
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- CN1055726A CN1055726A CN 91106378 CN91106378A CN1055726A CN 1055726 A CN1055726 A CN 1055726A CN 91106378 CN91106378 CN 91106378 CN 91106378 A CN91106378 A CN 91106378A CN 1055726 A CN1055726 A CN 1055726A
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- magnesia
- magnesia cement
- organosilicon
- waterproofing agent
- cement
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Abstract
The present invention relates to a kind of magnesia cement.It comprises magnesia, magnesium chloride solution and an amount of filler of forming traditional magnesia cement.Its technical essential is to add waterproofing agent of organosilicon in mentioned component.Said waterproofing agent of organosilicon is methyl silicon sodium alcoholate (potassium) and high boiling Sodium silanolate (potassium).The add-on of its waterproofing agent of organosilicon be in the magnesia cement composition contained magnesia amount 0.6～2%.This magnesia cement can prevent the disadvantage of former magnesia cement damp suction surface halide accumulation dewfall effectively, thereby improve the use properties of this magnesia cement owing to added waterproofing agent of organosilicon.
Description
The present invention relates to a kind of magnesia cement.
Magnesia cement also claims Suo Lieer (Sorel) cement.It is made up of the magnesia of producing through the roasting giobertite, magnesium chloride solution etc.The cement products heat conductivity of producing with this cement is low, good heat insulating; Attrition resistance is good; Can gather materials by bonding various types of organic or inorganics; The early strength height; Has elasticity; Energy insect protected post; In light weight; Many advantages such as grease resistance erosion.For industry, commerce, family etc. serve as floor or other finishing material.But present easy damp suction surface halide accumulation of magnesia cement goods and the product surface dewfall of using seriously reduced the use properties of this magnesia cement goods, and life-time service also can produce distortion and cracking.In order to overcome above-mentioned shortcoming, people have carried out a large amount of tests, research.A kind of magnesium cement that can overcome above-mentioned shortcoming that utilizes Adlerika to produce is disclosed for No. 4003752 as United States Patent (USP), this magnesium cement mainly is that Adlerika replaces magnesium chloride solution, for the goods that prevent this magnesium cement shrink and cracking, when Adlerika replaces magnesium chloride solution, to add the mixture of paper pulp or paper pulp and glass fibre in this magnesium cement.Use magnesium chloride solution to produce the shortcoming of magnesium cement goods moisture absorption dewfall though this magnesium cement has overcome, the intensity of its goods descends to some extent, and life-time service also can produce distortion, and result of use can not be satisfactory.In addition, owing to the adding of paper pulp and glass fibre, increased the cost of these magnesium cement goods in this magnesium cement goods.
A kind of its product surface that the objective of the invention is to provide in order to overcome above-mentioned deficiency can keep dry, the in use nonhygroscopic moisture-absorption and halogenation resistant magnesia cement that returns halogen of goods.
The present invention is achieved in that it comprises magnesia, the magnesium chloride solution of forming traditional magnesia cement, its technical essential is: add waterproofing agent of organosilicon in mentioned component, said waterproofing agent of organosilicon is methyl silicon sodium alcoholate (potassium) or high boiling Sodium silanolate (potassium).Magnesia in this magnesia cement is to be formed through traditional technology calcining by giobertite.It is 1.18 to 1.24g/cm that magnesium chloride solution generally refers to proportion
3The aqueous solution of magnesium chloride.When making the magnesia cement goods, can also add some and resemble inert materials such as sawdust, sand.The add-on of waterproofing agent of organosilicon in this magnesia cement is generally decided according to this applied area of magnesia cement goods.In the humid region, the add-on of waterproofing agent of organosilicon is more; And can lack in the add-on of exsiccant area waterproofing agent of organosilicon.The add-on of waterproofing agent of organosilicon is preferably 0.6～2%(weight meter of contained magnesia amount in this magnesia cement) if the add-on of waterproofing agent of organosilicon is less than 0.6% of magnesia amount, waterproofing agent of organosilicon is difficult to form fine and close waterproof membrane in the magnesia cement goods, does not also just reach the effect of anti-moisture absorption well.If the add-on of waterproofing agent of organosilicon greater than 2% of the magnesia amount, will increase the cost of this magnesia cement goods.In order to reach the excellent waterproof effect, the methyl silicon sesquialter oxygen level in the said waterproofing agent of organosilicon should be more than or equal to 18%.
In the magnesia cement of the present invention, owing to added waterproofing agent of organosilicon, can form very thin hydrophobic membrane at the surface, space and the kapillary internal surface of the formed goods of this magnesia cement inside, form such film too on the outside surface that this magnesia cement goods are exposed simultaneously.As this film and airborne CO
2Form the stronger and competent especially carbonized film of hydrophobic nature after the gas effect.So just can make magnesium chloride exist the surface that causes former magnesia cement goods to have the intensive moisture absorption to become the very strong surface of hydrophobic nature because of free state.Thereby prevented the generation of outside surface damp suction surface halide accumulation dewfall, the inner unnecessary magnesium chloride phenomenon of outwards oozing out in use of this magnesia cement goods effectively.The surface drying of this magnesia cement goods has also overcome shortcomings such as the distortion that causes because of former magnesia cement goods damp suction surface halide accumulation dewfall and cracking.
Embodiment:
According to the three kinds of magnesia cements of one-tenth assignment system A, B, C in the table 1.
Table 1:
| Numbering | Magnesia | Proportion 1.22g/cm 3Magnesium chloride solution | Methyl silicon sodium alcoholate |
| A | 1 | 0.52 | 0 |
| B | 1 | 0.52 | 0.008 |
| C | 1 | 0.51 | 0.0155 |
Magnesia in the present embodiment is to be formed through traditional technology calcining by giobertite, and the content of magnesia in the magnesia that calcining is made is greater than 75 percent, and loss on ignition is less than 1 15.The content of magnesium chloride of used magnesium chloride solution is greater than 45 percent; KCE content is less than 0. 5 percent; Sodium chloride content is less than 2 percent.According to the proportioning of the A in the table 1, B, three kinds of magnesia cement compositions of C, the test block of manufacturing three groups of 305 * 305 * 16mm, every group of test block manufactured five.These three groups of test blocks all are to manufacture and maintenance according to the method for routine.The good demoulding of three groups of test block maintenances of this that manufacture is put into these three groups of test blocks humidity simultaneously for a long time greater than 90% testing laboratory after demoulding, observe the moisture absorption situation every day, and the result who observes is inserted table 2.
Table 2
By the test-results in the table 2 as can be seen, the A that does not add methyl silicon sodium alcoholate forms the test block that branch is produced, in a humid environment through shelf-time of two days, the surface of test block the globule occurs with regard to moisture absorption dewfall, the globule is increasing later on, just condensed by about 30 days and to grow up into large water drop, drop down downwards from the surface of test block.And two groups of magnesia cement test blocks of B, C of adding methyl silicon sodium alcoholate in a humid environment, also can keep the surface drying state all the year round.
According to the magnesia cement composition in the table 1, change methyl silicon sodium alcoholate into methyl silanol potassium or high boiling Sodium silanolate (potassium), through test, its effect is identical with the effect that adds methyl silicon sodium alcoholate.The magnesia cement goods of promptly being produced also can keep its surface dry all the year round in a humid environment.
Claims (3)
1, moisture-absorption and halogenation resistant magnesia cement comprises magnesia and magnesium chloride solution, it is characterized in that: add waterproofing agent of organosilicon in mentioned component, said waterproofing agent of organosilicon is methyl silicon sodium alcoholate (potassium) or high boiling Sodium silanolate (potassium).
2, moisture-absorption and halogenation resistant magnesia cement according to claim 1 is characterized in that: the add-on of waterproofing agent of organosilicon is 0.6～2% of a magnesia amount.
3, moisture-absorption and halogenation resistant magnesia cement according to claim 1 is characterized in that: the methyl silicon sesquialter oxygen level in the waterproofing agent of organosilicon is more than or equal to 18%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106378 CN1025914C (en) | 1991-04-11 | 1991-04-11 | Moisture-absorption and halogenation resistant magnesia cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106378 CN1025914C (en) | 1991-04-11 | 1991-04-11 | Moisture-absorption and halogenation resistant magnesia cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055726A true CN1055726A (en) | 1991-10-30 |
| CN1025914C CN1025914C (en) | 1994-09-14 |
Family
ID=4907800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91106378 Expired - Fee Related CN1025914C (en) | 1991-04-11 | 1991-04-11 | Moisture-absorption and halogenation resistant magnesia cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1025914C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776945A (en) * | 2016-02-03 | 2016-07-20 | 宁波保税区韬鸿化工科技有限公司 | Clay shielding agent and preparation method thereof |
| CN106029601A (en) * | 2014-01-17 | 2016-10-12 | 陆克瑟克里特有限责任公司 | Cement compositions, structures, and methods of use |
| CN108559402A (en) * | 2018-05-11 | 2018-09-21 | 南通瑞隆新材料有限公司 | A kind of anti-static coatings |
-
1991
- 1991-04-11 CN CN 91106378 patent/CN1025914C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106029601A (en) * | 2014-01-17 | 2016-10-12 | 陆克瑟克里特有限责任公司 | Cement compositions, structures, and methods of use |
| CN105776945A (en) * | 2016-02-03 | 2016-07-20 | 宁波保税区韬鸿化工科技有限公司 | Clay shielding agent and preparation method thereof |
| CN105776945B (en) * | 2016-02-03 | 2018-01-16 | 宁波保税区韬鸿化工科技有限公司 | Clay screener and preparation method thereof |
| CN108559402A (en) * | 2018-05-11 | 2018-09-21 | 南通瑞隆新材料有限公司 | A kind of anti-static coatings |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1025914C (en) | 1994-09-14 |
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