JPH0530786B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for making an inorganic board waterproof. More specifically, it is a water-soluble water-resistant agent made of a fatty acid ester, a fatty acid metal salt, and at least one of fatty acids, and/or a water-soluble water-resistant agent obtained by reacting a fatty acid with a polyalkylene polyamine and/or a dialkyl alkylene diamine. The present invention relates to a method for manufacturing an inorganic board by processing raw material for the board. Hitherto, fatty acid metal salts, especially their calcium salts, have been used as water-resistant agents for inorganic boards, but they have had a number of drawbacks in terms of water resistance, yield, foaming during paper-making, etc. The water-soluble waterproofing agent used in the present invention is a water-soluble derivative of a saturated or unsaturated fatty acid or a mixture thereof. In order to improve these drawbacks, the present inventors have conducted extensive research and have found that a mixture system of fatty acid esters, fatty acids, fatty acid soaps, or fatty acid metal salts exhibits excellent effects, especially when saturated or The unsaturated fatty acid preferably has 8 to 22 carbon atoms, more preferably 8 to 18 carbon atoms, and most preferably 14 to 18 carbon atoms. On the other hand, water-soluble waterproofing agents obtained by reacting saturated or unsaturated fatty acids with polyalkylene polyamines and/or dialkyl alkylene diamines and then reacting with inorganic acids, organic acids, or quaternizing agents, or mixtures thereof, are also conventional products. It was found that it has a superior effect compared to. The fatty acid to be reacted with the polyalkylene polyamine or dialkyl alkylene diamine is a saturated fatty acid having 12 to 22 carbon atoms, preferably 16 to 18 carbon atoms. The present invention comprises an inorganic filler, one or more inorganic substances selected from the group consisting of inorganic oxides, carbonates, sulfates, silicates, chlorides, and composite salts thereof, and optionally organic pulp fibers. In a method for manufacturing an inorganic board by papermaking or molding a raw material to which a alkylene polyamine and/or
Or, after reacting a dialkyl alkylene diamine, and then reacting or adsorbing one or more of the above raw materials with a water-soluble waterproofing agent obtained by reacting an inorganic acid, an organic acid, or a quaternizing agent, further A method for producing an inorganic board characterized by mixing an inorganic substance and/or pulp fibers that have not been treated with the water-soluble waterproofing agent and further paper-making or molding. It is unsaturated and has 8 to 22 carbon atoms, preferably 8 to 22 carbon atoms, preferably 8 to 18 carbon atoms, and preferably 14 to 18 carbon atoms. The metal salts that make up fatty acid metal salts include potassium, sodium, calcium, magnesium,
Salts such as zinc, aluminum, zirconium, ammonium, alkanolamines or morpholine are fried. As the fatty acid ester, alkyl esters such as methyl and ethyl can be used. The fatty acid that is the raw material for the water resistant agent (b) is saturated or unsaturated, has 12 to 22 carbon atoms, and has 16 carbon atoms.
~18 is preferred. Examples of polyalkylene polyamines used in the present invention include diethylenetriamine and triethylenetetraamine. Dimethylpropylene diamine and the like can be used as the dialkyl alkylene diamine. As the quaternizing agent, epichlorohydrin, ethylene chlorhydrin, etc. can be used. Inorganic substances used as raw materials in the present invention include asbestos, glass fiber, gypsum, perlite, cement,
Inorganic compounds such as calcium carbonate, magnesium carbonate, calcium chloride, diatomaceous earth, talc, asbestos, perlite, zeolites, etc. can also be used. In the manufacturing method of the water resistant agent of the present invention, a mixture of two or more selected from salts of saturated, unsaturated or mixed fatty acids, metal salts thereof, alkyl esters, etc. is emulsified and dispersed, and then a high-pressure emulsifier is used. pressure
100Kg/cm ² - 300Kg/cm ² Preferably 200 - 300Kg/cm ²
can be obtained by passing it through once or several times. On the other hand, preferably 12 to 22 carbon atoms, more preferably 16 to 22 carbon atoms
A water-soluble waterproofing agent can also be obtained by reacting 18 saturated fatty acids with polyalkylene polyamine or dialkyl alkylene diamine and then reacting with an inorganic acid, an organic acid, or a quaternizing agent such as epichlorohydrin or ethylene chlorohydrin. . One feature of the production method of the present invention is that a raw material that has been treated with a waterproofing agent (hereinafter referred to as treated raw material) is mixed with a raw material that has not been treated with a waterproofing agent (hereinafter referred to as untreated raw material). The method of mixing raw materials according to the present invention may include the following, but is not limited thereto. 1. After treating one type of untreated raw material with a waterproofing agent,
This is mixed with other raw materials. 2. Mix two types of untreated raw materials, treat this with a waterproofing agent, and then add and mix other untreated raw materials. 3. Two types of untreated raw materials are treated separately with a waterproofing agent, and after mixing these, another untreated raw material is further mixed. 4. Two types of untreated raw materials are treated separately with a waterproofing agent, one of the treated raw materials is mixed with the other untreated raw material, and then the other treated raw material is further mixed therewith. The details will be explained below with reference to production examples and examples, but the scope is not limited thereto. Production Example 1 50 parts of stearic acid and 30 parts of oleic acid were placed in a reaction vessel equipped with an agitator, heated and melted, and after raising the temperature to 150°C, 8.44 parts of slaked lime was gradually added and the reaction was carried out for 3 hours.
After the reaction was completed, 20 parts of fatty acid methyl ester having 14 to 18 carbon atoms and an iodine value of 60 were added and mixed. Next, the temperature in the system is
Cool to 90℃, add 6.4 parts of 50% KOH aqueous solution and react, then gradually add 4256 parts of 70℃ warm water, emulsify and disperse, and then use a piston type high pressure emulsifier to produce 250Kg/cm ²
After passing through the solution once at a pressure of Production example 2 Add 20 parts of stearic acid to 80 parts of fatty acid methyl ester with 14 to 18 carbon atoms and an iodine value of 60 in a reaction vessel equipped with a stirrer, mix and melt, then maintain the system internal temperature at 80°C to reduce to 50%.
8.0 parts of KOH was gradually added to cause a reaction. Then the water temperature is 70℃
300 parts were gradually added to perform emulsification and dispersion. After that, at the same temperature, using a piston-type high-pressure emulsifier,
Passed twice under pressure of Kg/cm ² and then rapidly cooled to 25% active ingredient.
A water resistant agent was obtained. Production example 3: Pour 284 parts of stearic acid into a reaction vessel equipped with an agitator 80
After melting at 180°C, 103 parts of diethylenetriamine was added and the temperature was gradually raised to carry out a dehydration reaction at 180°C for 3 hours. After the reaction was completed, the temperature in the system was cooled to 100°C, 120 parts of glacial acetic acid was added, and then 1356 parts of 70°C hot water was added.
Add gradually and emulsify. Thereafter, the mixture was rapidly cooled once at a pressure of 150 kg/cm ² using a piston-type high-pressure emulsifier to obtain a water-resistant agent containing 20% of the active ingredient. Example 1-3 After dispersing 500 parts of heavy calcium carbonate in 1000 parts of water, and stirring, the water resistance agent obtained in Production Example 1-3 was added to the solid content of 0.5% based on the weight of heavy calcium carbonate.
Add the appropriate amount and stir for 10 minutes. Next, a mixture of 5 parts of pulp and 85 parts of cement prepared in advance (concentration
15%) was added with the above-obtained water-resistant treated heavy calcium carbonate slurry in an amount equivalent to 10 parts solids, stirred and mixed, and then dehydrated and molded. Next, the obtained molded product was heated at 80-90℃ for 24 hours at 60℃.
After curing for -48 hours, the samples were dried at 80°C for 10 minutes and at 60°C for 24 hours, then immersed in water to measure water absorption. The results are shown in Table 1. Comparative Example 1 The operation of Example 1 was repeated with the addition of 0.5% calcium stearate instead of the waterproofing agent obtained in Production Example 1-3. Table 1 shows the results of the water resistance of the obtained inorganic board. Comparative Example 2 The procedure of the above example was repeated without using the waterproofing agent. Table 1 shows the results of the water resistance of the obtained inorganic board.

[Table] As shown in the test results, it was confirmed that the inorganic board manufactured according to the present invention has better water resistance than conventional products.

Claims (1)

[Claims] 1. An inorganic filler and one or more inorganic substances selected from the group consisting of inorganic oxides, carbonates, sulfates, silicates, chlorides, and complex salts thereof, as necessary. A method for manufacturing an inorganic board by paper-making or molding a raw material to which organic pulp fibers are added, comprising: (a) a water-soluble waterproofing agent comprising at least one of a fatty acid ester and a fatty acid and a fatty acid metal salt; and/or (b) ) fatty acids with polyalkylene polyamines and/or
Or, after reacting a dialkyl alkylene diamine, and then reacting or adsorbing one or more of the above raw materials with a water-soluble waterproofing agent obtained by reacting an inorganic acid, an organic acid, or a quaternizing agent, further A method for producing an inorganic board, comprising mixing an inorganic substance and/or pulp fibers that have not been treated with the water-soluble waterproofing material, and further paper-making or molding.