Aqueous hydrophobic waterproof emulsion
A waterproof emulsion, hydrophobic technology, applied in coatings, paper coatings, textiles and papermaking, etc., can solve the problems of lack of economic advantages, difficulties, soaring resin prices, etc., to achieve excellent water repellency and waterproof effect, simple operation, high performance stable effect
Inactive Publication Date: 2019-02-01
LANXI FANSHIDA NEW MATERIAL TECH CO LTD
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Problems solved by technology
But it also has limitations: 1. It destroys the air permeability of paper products; 2. The coating equipment for large and oversized commodity packaging is limited; 3. Due to the impact of oil prices, the price of resin has soared, and the economy is not advantageous, and Water resistance is still not enough to replace plastic film
However, the wetting agent silicone oil cannot improve the water resistance, and the effect of wax emulsion on improving the hydrophobicity of the coating is not obvious
[0005] Sizing agent is added in the manufacturing process of paper and cardboard to achieve waterproof performance, but this waterproof performance has a certain measure. Generally, it is difficult to achieve water absorption below 30g / m2. To further improve the waterproof effect, it must be coated outside the machine. Hydrophobic Water Repellent
Method used
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[0027] The following examples are limited to the explanation of the present invention, and do not constitute a limitation on the claims of the present invention.
[0028] A water-based hydrophobic and waterproof emulsion is prepared by the following method:
[0029] The first step: Put the following raw materials into the reactor and heat it to 180 degrees, and react for 6 hours
[0030]
[0031] Step 2: Cool the above-mentioned reactant to 100 degrees, add 20 g of emulsifier, stir, add 12 g of morpholine, 30 g of potassium hydroxide aqueous solution, and stir at high speed (3000 rpm) for 15 minutes.
[0032] Step 3: Boil 172g of water and slowly add it to the reactor. At this time, the solution in the reactor will become viscous, forming an amber viscous substance. Continue to add water. After reaching a certain amount, the viscous liquid will instantly become thinner , Complete the phase inversion and turn into a milky white emulsion.
[0033] Step 4: Add the remaining ...
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The invention relates to an aqueous hydrophobic waterproof emulsion. The waterproof emulsion contains three waterproof functional components having synergistic effects, which are 5-30% of a polymericoxidized polyethylene wax emulsion, 10-30% of a nano-paraffin emulsion, 10-30% of a rosin glyceride emulsion, and the balance of stearic acid, an emulsifier, morpholine, an aqueous potassium hydroxidesolution and water; and the surface of paper is coated with the waterproof emulsion, and the waterproof emulsion is demulsified in the drying process to form a surface hydrophobic structure. The waterproof emulsion has the following advantages: the waterproof emulsion can be applied manually, and also can be applied to the surface of a paperboard by external coating, so the operation is simple; and compared with other hydrophobic water-repellent additives, the waterproof emulsion has the characteristics of low cost, easiness in biodegradation under natural condition, and no pollution to the environment.
Description
technical field [0001] The invention relates to a water-based hydrophobic and waterproof emulsion, which is mainly used for water-based coatings in cardboard, cartons, paper printed matter and other industries that require hydrophobic properties. Background technique [0002] Paper products have a large market share in modern commodity packaging. It is cheap and recyclable, which is economical and environmentally friendly. Compared with other materials such as plastic, paper printed matter has many excellent characteristics such as cheap and easy to obtain, easy to print, and green and environmental protection. However, the disadvantage of poor water resistance also greatly limits the application of paper packaging in many fields. Especially those occasions that are prone to contact with water, such as short-term rain during transportation. In order to prevent the paper-packed products from being damaged by water, people adopt two methods, that is, to cover the outer surfa...
Claims
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IPC IPC(8): D21H19/22D21H19/18
CPCD21H19/18D21H19/22
Inventor θζδΈ
Owner LANXI FANSHIDA NEW MATERIAL TECH CO LTD