Modified amino resin for desiccant for corrugated case and preparation method thereof
A corrugated box and amino resin technology, applied in papermaking, textiles and papermaking, fiber raw material processing, etc., can solve problems such as uneven painting, leakage points, improper operation and use, etc.
Inactive Publication Date: 2014-02-05
张家港市敬业包装有限公司
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Problems solved by technology
[0002] Among all kinds of packaging for industrial products, corrugated boxes have become the mainstream of the packaging industry. Because of their light weight, foldability, low cost, environmental protection, easy specification changes, high-quality printing, and recycling, they can be used as renewable materials. Resources, therefore, are used more and more widely, but it has a fatal weakness: the surface of the carton is easily affected by moisture, and after contact with water, various physical performance indicators will drop sharply. Has certain moisture-proof and waterproof functions
At present, the protection requirements on the surface of corrugated boxes are traditionally divided into two categories: one is to use moisture-proof packaging, and a layer of moisture-proof agent is coated on the surface of corrugated boxes; the other is to directly use waterproof packaging, but this method of packaging High cost, difficult for users to accept
No matter which method is used, there are certain defects: for example, some moisture-proof and waterproof agents on the market have low moisture-proof and waterproof performance indicators due to the defects of their resin quality, and improper operation and use, resulting in uneven coating. , prone to local leakage points, some are not environmentally friendly or have high manufacturing costs, and are difficult to carry out industrialized mass production and other defects
Method used
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Embodiment Construction
[0007] The present invention will be further described below in conjunction with embodiment
[0008] 1. Accurately weigh 12% urea; 40% formaldehyde; 37% n-butanol; 0.2% phthalic anhydride; 1.5% xylene;
[0009] 2. Preparation method
[0010] Put formaldehyde, n-butanol, and xylene into the reaction kettle, add urea while stirring, then stir to raise the temperature to 150°C, and reflux for 2.5 hours, add phthalic anhydride, and adjust the pH value to 4.5-5.0 with sodium hydroxide , and then reflux for 1.5 hours, start stirring after stilling the water separation, raise the temperature and reflux the water until it is above 105°C, evaporate part of the butanol, adjust the viscosity to pass, cool to room temperature, purify and filter for packaging.
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The invention relates to a modified amino resin for a corrugated case desiccant and a preparation method thereof. The modified amino resin for the corrugated case desiccant mainly comprises urea, formaldehyde, n-butanol, phthalic anhydride, xylene and sodium hydroxide. The modified amino resin for the corrugated case desiccant has the advantages of high curing speed, smooth film and firmness, and has good waterproofness and humidity resistance when applied to the corrugated case.
Description
technical field [0001] The invention relates to a modified amino resin used as a moisture-proof agent for corrugated cartons and a preparation method thereof, which belongs to the technical field of packaging aids for paper products. Background technique [0002] Among all kinds of packaging for industrial products, corrugated boxes have become the mainstream of the packaging industry. Because of their light weight, foldability, low cost, environmental protection, easy specification changes, high-quality printing, and recycling, they can be used as renewable materials. Resources, therefore, are used more and more widely, but it has a fatal weakness: the surface of the carton is easily affected by moisture, and after being exposed to water, various physical performance indicators will drop sharply. It has certain moisture-proof and waterproof functions. At present, the protective requirements on the surface of corrugated boxes are traditionally divided into two categories: o...
Claims
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IPC IPC(8): C08G12/40C08G12/12D21H21/14
Inventor 周建花
Owner 张家港市敬业包装有限公司
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