Unlock instant, AI-driven research and patent intelligence for your innovation.

Water resisting agent for coating of coated paper and preparation method thereof

A coating water-repellent agent, coated paper technology, applied in the direction of paper coating, water-repellent agent addition, coating, etc., can solve the problems of unfavorable printing of paper and cardboard, affecting production efficiency, long-term cross-linking and curing, etc., to achieve printing Strong adaptability, improved production efficiency, and fast cross-linking and curing

Active Publication Date: 2009-07-08
HUBEI DAYA BIOLOGICAL TECH CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because it takes a long time for the amino resin, especially the melamine formaldehyde resin, to fully cross-link and cure with the adhesive in the coating, which makes the produced paper and cardboard unfavorable for immediate printing
This process greatly affects the production efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 1 mol of adipic acid into a four-necked bottle equipped with an electric stirrer, a thermometer, a condenser and a water separator, add 1.2 mol of diethylenetriamine, start stirring, raise the temperature to 120°C for 1 hour, and control the temperature at 165°C for 1 hour , continue to heat up to 190°C for 2 hours, remove the condensed water continuously, cool down to 110°C, add 1.6mol thiourea, keep the temperature at 80°C for 3h, add 0.5mol epichlorohydrin and 405ml water when the temperature is lowered to 70°C , keep the temperature at 70°C for 40 minutes, adjust the pH value of the system to 7.0 with 10% hydrochloric acid to obtain an aqueous solution of polyamide polyurea epichlorohydrin, when the temperature drops to 30°C, add 90g of epoxy-modified water-soluble silicone oil, and stir 20 minutes to obtain the coated paper coating water repellant evenly.

[0016] The paint water repellent is a light yellow transparent liquid with a solid content of 55%, of whi...

Embodiment 2

[0018] Add 1 mol of adipic acid into a four-necked bottle equipped with an electric stirrer, a thermometer, a condenser and a water separator, add 1.2 mol of diethylenetriamine, start stirring, raise the temperature to 120°C for 1 hour, and control the temperature at 165°C for 1 hour , continue to heat up to 190°C for 2 hours, remove the condensed water continuously, cool down to 110°C, add 1.8mol thiourea, keep the temperature at 80°C for 3h, add 0.4mol epichlorohydrin and 566.5ml when the temperature is lowered to 70°C Water, keep the temperature at 70°C for 40 minutes, adjust the pH value of the system to 7.0 with 10% hydrochloric acid to obtain a polyamide polyurea epichlorohydrin aqueous solution, when the temperature drops to 30°C, add 51.5g of epoxy-modified water-soluble silicone oil , and stirred for 20 minutes to obtain a water-repellent agent for coated paper coatings evenly.

[0019] The paint water repellant is a light yellow transparent liquid with a solid conten...

Embodiment 3

[0021] Add 1 mol of adipic acid into a four-necked bottle equipped with an electric stirrer, a thermometer, a condenser and a water separator, add 1.2 mol of diethylenetriamine, start stirring, raise the temperature to 120°C for 1 hour, and control the temperature at 165°C for 1 hour , continue to heat up to 190°C for 2 hours, continuously remove condensed water, cool down to 110°C, add 2.0mol thiourea, keep the temperature at 80°C for 3h, add 0.5mol epichlorohydrin and 541ml water when the temperature is lowered to 70°C , keep the temperature at 70°C for 40 minutes, adjust the pH value of the system to 7.0 with 10% hydrochloric acid to obtain an aqueous solution of polyamide polyurea epichlorohydrin, when the temperature drops to 30°C, add 62.4g of epoxy-modified water-soluble silicone oil, Stir for 20 minutes until the water-repellent agent for coated paper coating is obtained evenly.

[0022] The paint water repellent is a light yellow transparent liquid with a solid conten...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention provides a water-resistant agent added as a chemical auxiliary agent in a coating used in the production of coated paper and a preparation method thereof. The paint water-repellent agent is composed of 40%-45% (mass percentage) of polyamide polyurea epichlorohydrin with the right group and 5%-10% of epoxy-modified water-soluble silicone oil The effective substance content is 45%-55% aqueous solution; the preparation method is: react diethylenetriamine and adipic acid at 120°C for 1h, heat up and control the temperature at 165°C for 1h, continue to heat up at 190°C React for 2 hours, continuously separate the reaction water in the system during the reaction, cool down to 110°C, add thiourea to the system, react at 80°C for 3h, finally add epichlorohydrin and water, react at 70°C for 40min, and 10% hydrochloric acid neutralizes the pH value of the system to 7.0, and then mixes it with epoxy-modified water-soluble silicone oil. The invention overcomes the defects that the existing anti-water agents have formaldehyde to pollute the environment and need to be cured after the paper is off the machine.

Description

Technical field [0001] The invention relates to a water-repellent agent compounded in a coating used in the production of coated processed paper, and a preparation method of the water-repellent agent. Background technique [0002] The water-repelling agent used in papermaking coatings is generally amino resin, the most typical being melamine formaldehyde resin. This kind of substance is used as a water repellent agent, which can improve the wet friction resistance and wet nap strength of coated paper, improve the printability of coated paper, and reduce the phenomenon of lint and powder falling. However, during the storage and use of such anti-water agent products, a certain amount of formaldehyde will be released, which will pollute the environment and endanger human health. In addition, the paper and cardboard produced by using this kind of water-resistant agent products need a certain period of time to mature after they are off the machine. This is because it takes a lo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16D21H19/12C08G69/28
Inventor 徐丹徐振明
Owner HUBEI DAYA BIOLOGICAL TECH CO LTD