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Modified coating water repellent agent and preparation method thereof

A water repellent and coating technology, applied in the addition of water repellents, coatings, paper coatings, etc., can solve the problems of product storage and adverse effects on the use environment, and achieve improved flexibility, coating performance, and weight solid content. improved effect

Active Publication Date: 2010-09-15
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since this type of product itself contains formaldehyde, it will have adverse effects on coating operations, product storage and use environment

Method used

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  • Modified coating water repellent agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 93 grams of diethylenetriamine and 11 grams of diethanolamine in a 1-liter four-neck flask equipped with a condenser, a thermometer and agitation, and when stirring, add 9.27 grams of sulfuric acid solution with a weight concentration of 10%, stir, Add 118 grams of succinic acid within 1 hour, react at 120°C for 30 minutes, heat up to 160°C for 4 hours, and continuously separate the water generated in the system during the reaction, and then cool down to 140°C, add deionized 186 grams of water was used to obtain an intermediate with a solid content of 50%. When the temperature of the system dropped to 80°C, 94 grams of thiourea was added, the temperature was raised to 100°C for 12 hours, and 250 grams of deionized water was added. When the temperature of the system drops to 40°C, add 46.4 grams of epichlorohydrin, react at 40°C for 6 hours, adjust the pH of the solution to 6.0 with sulfuric acid with a weight concentration of 10%, and obtain a modified polyamide with...

Embodiment 2

[0022] Add 88 grams of diethylenetriamine and 16 grams of diethanolamine in a 1-liter four-necked flask equipped with a condenser, a thermometer and agitation. Under the situation of stirring, add 37 grams of sulfuric acid solution with a weight concentration of 10%, stir, Add 146 grams of adipic acid within 1.5 hours, react at 125°C for 40 minutes, heat up to 170°C for 3 hours, and then cool down to 140°C, add 214 grams of deionized water to obtain a weight solid content of 50%. For the intermediate, when the system temperature drops to 80°C, 103 grams of thiourea is added, the temperature is raised to 105°C for 10 hours, and 244 grams of deionized water is added. When the temperature of the system drops to 40°C, add 37 grams of epichlorohydrin, react at 30°C for 8 hours, add acetic acid with a weight concentration of 15% to adjust the pH value of the solution to 7.0, and obtain a modified polyamide polyamide with a weight solid content of 57.5%. An aqueous solution of urea e...

Embodiment 3

[0024] Add 87 grams of diethylenetriamine and 22 grams of diethanolamine in a liter 1 four-necked flask equipped with a condenser, a thermometer and stirring, and add 60 grams of 10% acetic acid while stirring, and stir within 0.5 hours Add 146 grams of adipic acid, react at 125°C for 40 minutes, then raise the temperature to 175°C and react for 2.5 hours. During the reaction, the reaction water in the system is continuously separated, and then when the temperature is lowered to 140°C, add 219 grams of deionized water. To obtain an intermediate with a weight solid content of 50%, when the system temperature dropped to 80°C, 118 grams of thiourea was added, the temperature was raised to 110°C for 6 hours, and 233 grams of deionized water was added. When the temperature of the system drops to 40°C, add 25 grams of epichlorohydrin, react at 30°C for 9 hours, add acetic acid with a weight concentration of 15% to adjust the pH value of the solution to 7.5, and obtain a modified poly...

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Abstract

The invention discloses a modified coating water repellent agent as well as a preparation method and application thereof. The preparation method comprises following steps of: (1) adding polybasic acid in a mixture of diethylenetriamine, diethanol amine and acidic materials, reacting for 30-60min at 120-130 DEG C firstly, and then reacting for 1-4h at 160-190 DEG C and separating produced water in a system during reaction; (2) adding water and controlling the solid content of the system to be 55-60 percent; (3) lowering the temperature of the system to 50-80 DEG C, adding thiourea in the system, reacting for 6-12h at 100-110 DEG C, adding epichlorohydrin and water for reaction for 4-10h at 20-40 DEG C, neutralizing pH value of the system to be 6-8 with acid with the weight concentration of 5-15 percent and cooling to obtain the product. The modified coating water repellent agent has high solid content by weight and good coating performance and enables produced paper and paperboards not to need curing after being applied to production.

Description

technical field [0001] The invention relates to a modified coating water-resistant agent and a preparation method thereof, in particular to a modified polyamide polyurea epichlorohydrin water-resistant agent and a preparation method thereof. Background technique [0002] When coated paper is used for color printing, in order to achieve the purpose of surface waterproof or water resistance, in addition to adding water-resistant substances to the base paper or strengthening internal sizing, the most fundamental and direct way is to add water-resistant agents to the coating. As a component of coatings, water repellents can reduce the water solubility of pigments and adhesives after drying into films, improve the wet friction resistance and napping strength of coated paper, effectively improve the printability of coated paper, and reduce lint and powder shedding And so on. Currently commonly used water repellents for paper coating mainly include amino resins, metal salts and po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/48C08G69/42D21H19/12D21H21/16
Inventor 施晓旦李改霞王养臣
Owner SHANGHAI DONGSHENG NEW MATERIALS
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