Organosilicon-modified cationic aqueous polyurethane paper wet strength agent and preparation method
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A water-based polyurethane, cationic technology, applied in the field of chemistry, can solve the problems of poor emulsion storage stability and mechanical properties of coating films, damage to mechanical properties of materials, low surface energy, etc., to avoid free formaldehyde and organic halides, improve mechanical properties. Good performance and compatibility
Inactive Publication Date: 2017-04-26
ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
View PDF6 Cites 6 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
This method has limitations in improving the degree of cationicity. The amount of tertiary amino chain extender directly affects the physical crosslinking of hydrogen bonds between polyurethane hard segments. Excessive use will lead to serious phase separation, thereby destroying the mechanical properties of the material.
[0004] Silicone resin has the advantages of low surface energy, water resistance, high and low temperature resistance, and flame retardancy. In the existing preparation methods, linear polysiloxane-modified waterborne polyurethane containing active groups is the main method, and the water resistance has been improved. However, severe phase separation makes the storage stability of the emulsion and the mechanical properties of the coating film poor.
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
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0031] A silicone-modified cationic water-based polyurethane paper wet strength agent, prepared by the following method:
[0032] S1. Add 11.1 g of tertiary amino polyoxyethylene diol, 100 g of polytetrahydrofuran diol, and 49.3 g of polyoxypropylene triol with a number-average molecular weight of 1000 after vacuum dehydration to a four-necked bottle equipped with a reflux condenser In the middle, stir, heat up, and when the temperature rises to 65-80°C, add 0.001g of dibutyltin dilaurate, 102.8g of isophorone diisocyanate and 37ml of acetone, and react for 2-3h;
[0033] S2. Cool down to 40°C, add 22.1g of N,N-dimethyldiethanolamine, control the appropriate dropping rate, add 18ml of acetone to reduce the viscosity, and extend the chain reaction for 2-3h;
[0034] S3. Then add 3.2 g of methyl ethyl ketone oxime and react for 2-3 hours, then add 11.8 g of glacial acetic acid to form a quaternary ammonium salt cation, and complete the reaction to obtain a polyurethane prepolyme...
Embodiment 2
[0037] A silicone-modified cationic water-based polyurethane paper wet strength agent, prepared according to the method described in Example 1, including the following raw materials: tertiary amino polyoxyethylene glycol 5g, polytetrahydrofuran glycol 100g, polyoxypropylene triol 46.7 g, 93.4g of isophorone diisocyanate, 20.9g of N,N-dimethyldiethanolamine, 3.1g of methyl ethyl ketoxime, 10.8g of glacial acetic acid, 662.9g of deionized water, N-(β-aminoethyl)-γ - Aminopropylmethyldimethoxysilane 15.3 g.
Embodiment 3
[0039] A silicone-modified cationic water-based polyurethane paper wet strength agent, prepared according to the method described in Example 1, including the following raw materials: tertiary amino polyoxyethylene glycol 25g, polytetrahydrofuran glycol 100g, polyoxypropylene triol 55.4 g, 115g of isophorone diisocyanate, 25g of N,N-dimethyldiethanolamine, 3.5g of methyl ethyl ketoxime, 15g of glacial acetic acid, 800g of deionized water, N-(β-aminoethyl)-γ-aminopropyl Methyldimethoxysilane 18g.
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
Login to view more
Abstract
The invention relates to the technical field of chemistry, and in particular to an organosilicon-modified cationic aqueous polyurethane paper wet strength agent and a preparation method. The organosilicon-modified cationic aqueous polyurethane paper wet strength agent consists of the following materials: polyether diol, tertiary amino polyether diol, polyether triol, dibutyltin dilaurate, isocyanate, cationic hydrophilic chain extender, end-capping agent, glacial acetic acid, acetone, organosilicon modifier and water. The invention introduces tertiary amino groups into both a soft segment structure and a hard segment structure, quaternary ammonium cations are generated after acid neutralization, consequently, the cationic degree is increased, and the organosilicon-modified cationic aqueous polyurethane paper wet strength agent can be better adsorbed on paper fibers with negative charges, and can be quickly and completely retained; by organosilicon modification, crosslinking density is increased, a chemical network structure is formed, and the organosilicon-modified cationic aqueous polyurethane paper wet strength agent which has a high cationic degree and high wet strength can be formed when used on paper; with water as dispersant, the organosilicon-modified cationic aqueous polyurethane paper wet strength agent is nontoxic, pollution-free and highly compatible, and the existence of free formaldehyde and organic halide in conventional wet strength agents are prevented, so the organosilicon-modified cationic aqueous polyurethane paper wet strength agent is environment-friendly and safe.
Description
technical field [0001] The invention relates to the technical field of chemistry, in particular to an organosilicon-modified cationic water-based polyurethane paper wet strength agent and a preparation method thereof. Background technique [0002] Water-based polyurethane (WPU) uses water as a solvent, has the characteristics of non-toxic, non-polluting, safe, reliable, good compatibility, and easy to modify, and has good applications in the fields of coatings, adhesives, textiles, and papermaking. The precipitation of free formaldehyde and the presence of organic chlorine in traditional paper wetting strength agents will cause certain harm to the environment and human body. Therefore, water-based polyurethane has become a hot spot in the research of wet strength agents in the paper industry in recent years. Blocked cationic water-based polyurethane can generate electrostatic attraction with hydroxyl groups in paper fibers, form physical crosslinking, increase paper strength...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more