Organosilicon modified aqueous polyurethane resin and preparation thereof

Abstract

An organosilicon modified aqueous polyurethane resin comprises the following raw materials in percentage by weight: 10 to 20 percent of isocyanate, 20 to 40 percent of polyester polyol, 0.1 to 5 percent of organic silicon oil, 2 to 5 percent of a hydrophilic chain extender, 2 to 5 percent of a polyol chain extender, 1 to 3 percent of a polybasic amine chain extender, 0.01 to 1 percent of a catalyst, 1 to 4 percent of a salifying agent, 5 to 8 percent of a solvent and the rest of water. The emulsion made by the organosilicon modified aqueous polyurethane resin is obviously better than the emulsion made by a non-modified aqueous polyurethane resin regarding adhesion force, abrasion resistance, heat tolerance, smoothness, etc. The polyurethane emulsion made by the organosilicon modified aqueous polyurethane resin can be applied to the surface of a product through spray coating, brush coating, roller coating and dip coating. At present, the polyurethane emulsion is mainly used for the coating of the surfaces of gloves, condoms, medical ducts, etc.

Description

technical field [0001] The invention relates to the field of water-based polyurethane, in particular to organosilicon-modified water-based polyurethane and a preparation method thereof. Background technique [0002] Natural latex gloves are one of the most commonly used protective gloves, but the ingredients in latex gloves (for example: protein) may cause allergies or irritating contact dermatitis to contacts, and the chemicals added in the glove production process are also May cause allergic reactions in users. In order to prevent the hazards caused by natural latex gloves, there have been many related attempts, such as reducing the amount of natural latex or preparing gloves without potentially allergenic polymer elastomers. However, many polymer elastomers currently known Gloves give people a wearing feeling different from natural latex gloves. They are usually uncomfortable, not close-fitting, and may be difficult to wear. In addition, the inside of the glove is covere...

AI Technical Summary

Problems solved by technology

[0002] Natural latex gloves are one of the most commonly used protective gloves, but the ingredients in latex gloves (for example: protein) may cause allergies or irritating contact dermatitis to contacts, and the chemicals added in the glove production process are also cause allergies to users

In order to prevent the hazards caused by natural latex gloves, there have been many related attempts, such as reducing the amount of natural latex or preparing gloves without potentially allergenic polymer elastomers. However, many polymer elastomers currently known Gloves give people a wearing feeling different from natural latex gloves. They are usually uncomfortable, not close-fitting, and may be difficult to wear. In addition, the inside of the glove is covered with powder or the surface of the glove is treated with halogen. Although it helps to increase slip, It is easy to wear, but if the powder on the medical gloves enters the wound, it is easy to increase the risk of infection and inflammation of the patient, and the gloves containing powder are not good for the electronics industry, because for precision electronic equipment, the powder is Potential source of contamination, while halogen-treated glove surfaces can cause significant signs of glove degradation, such as embrittlement or discoloration

[0003] At present, although water-based polyurethane can properly improve the problem of donning and powdering gloves, there are still other insurmountable shortcomings. For example, commercial water-based polyurethane products are limited by the synthesis process, and synthetic preparations must use low-reactivity with water. Aliphatic or cycloaliphatic diisocyanate, isocyanate has isophor diisocyanate IPDI, 1,6-hexyl isocyanate HDI, dicyclohexylmethane diisocyanate H12MDI, tetramethylcyclohexylmethane diisocyanate TMXD, etc., the price of these diisocyanates Expensive, which makes the raw material cost of water-based polyurethane much higher than other materials. In addition, after impregnation and coating, the traditional water-based polyurethane will form a film that is easy to crack during the drying process due to the poor fusion between water-based polyurethane particles. As a result, the film after film formation cannot show the original high performance of polyurethane