Novel self-adhesive waterborne polyurethane dispersion material

A water-based polyurethane and self-adhesive technology, which is applied in the field of polyurethane materials, can solve the problems of confusing pressure-sensitive adhesives with different natures, expensive synthesis costs, and imperfect processes, etc., and achieve good self-adhesive effects, low cost, and soft texture.

Inactive Publication Date: 2015-06-24
SHANGHAI KB MATERIAL TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Yang Huaxin's master's degree thesis ("Preparation and Application of Adhesives for Self-Adhesive Bandages", Nanjing Forestry University, published in 2010) disclosed the performance comparison of acrylate and polymerized isoprene latex as the rubber for self-adhesive bandages. Although the self-adhesiveness of acrylate provided

Method used

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0033] (1) Preparation of self-adhesive aqueous polyurethane dispersion new material (by mass parts shown in Table 1)

[0034] Step 1, put the polymer diol, hydrophilic monomer and co-solvent into the reaction kettle, and vacuum dehydrate at 100°C for more than 1 hour;

[0035] Step 2, the temperature of the reaction kettle is lowered to below 90°C, adding diisocyanate, heating up, and reacting;

[0036] Step 3, cooling down to below 55°C, adding neutralizing agent and diluting solvent;

[0037]...

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Abstract

The invention relates to a novel self-adhesive waterborne polyurethane dispersion material, which is prepared through the following steps: 1, putting a polymer glycol, a hydrophilic monomer and a cosolvent into a reaction kettle, and carrying out vacuum dehydration for over 1 h at a temperature of over 100 DEG C, wherein the polyether glycol is polyether glycol with a molecular weight of 1000-10000; 2, reducing the temperature of the reaction kettle to below 90 DEG C, adding diisocyanate, raising the temperature, and reacting; 3, reducing the temperature to below 55 DEG C, and adding a neutralizing agent and a diluting solvent; and 4, adding deionized water while stirring, continuously stirring for over 10 min, heating to 45-75 DEG C, carrying out vacuum solvent extraction for over 1 h, cooling, and filtering, so that a self-adhesive waterborne polyurethane dispersion is obtained. The self-adhesive waterborne polyurethane dispersion material provided by the invention is good in self-adhesion effect, soft in texture and low in cost, and does not stick to the skin and hairs, therefore, the self-adhesive waterborne polyurethane dispersion material further has the application value in the aspect of medical elastic bandages.

Description

technical field [0001] The invention relates to a polyurethane material, in particular to a new self-adhesive water-based polyurethane dispersion material. Background technique [0002] Self-adhesive water-based polyurethane material is mainly used as self-adhesive bandage compound. The self-adhesive bandage is sprayed with a layer of self-adhesive adhesive on the front of the traditional medical bandage, which has no obvious sticky feeling to the touch, and does not stick to hair and skin. [0003] The self-adhesive elastic bandages in the prior art are generally coated on the surface of the elastic substrate by various coating methods such as spraying, scraping or dipping through natural latex with tackifying resins, emulsifiers and other additives. Due to its own viscoelasticity, it can be made into an elastic bandage product with self-adhesive properties. However, due to the presence of protein in natural rubber latex, it is easy to cause skin allergies in some people,...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/34C08G18/30C08G18/12C08G18/08
CPCC08G18/12C08G18/0823C08G18/4063C08G18/4808C08G18/4833C08G18/4854C08G18/6229C08G18/6541C08G18/6692C08G18/302
Inventor 陈强
Owner SHANGHAI KB MATERIAL TECH CO LTD
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