阅读说明：本技术 一种环保型浸胶液及其制备方法 (Environment-friendly impregnation liquid and preparation method thereof ) 是由 鞠凤坦 于 2018-08-10 设计创作，主要内容包括：本发明公开一种环保型浸胶液,包括以下重量份的组分：封闭性异氰酸酯3～20份、水溶性环氧树脂1～5份、胶乳40～240份、马来酸酐化聚丁二烯3～30份、纯水65～350份。同时提供其相应的制备方法。本发明的浸胶液中完全不含间苯二酚、甲醛及其衍生物,所用原料物质不在危险化学品范畴内,绿色环保,且浸胶液水溶性、水分散性好,达到了欧盟及国家有关部门的要求；在锦纶6、锦纶66、涤纶、芳纶、氨纶等纤维制成的帘子布、帆布、线绳的浸胶工艺应用中,取得了良好的效果,所得产品物性指标达到甚至超过了国家优等品标准,解决了“RFL浸胶液”的替代问题。(The invention discloses an environment-friendly glue dipping solution which comprises the following components in parts by weight: 3-20 parts of blocked isocyanate, 1-5 parts of water-soluble epoxy resin, 40-240 parts of latex, 3-30 parts of maleic anhydride polybutadiene and 65-350 parts of pure water. Also provides a corresponding preparation method. The dipping solution of the invention does not contain resorcinol, formaldehyde and derivatives thereof, the used raw material substances are not in the category of dangerous chemicals, the dipping solution is green and environment-friendly, and the water solubility and the water dispersibility of the dipping solution are good, thereby meeting the requirements of related departments of European Union and China; the method has good effect in the dipping process application of cord fabrics, canvases and ropes made of the fibers of chinlon 6, chinlon 66, terylene, aramid fiber, spandex and the like, the physical property index of the obtained product reaches or even exceeds the national high-class product standard, and the substitution problem of RFL dipping solution is solved.)

1. The environment-friendly glue dipping solution is characterized by comprising the following components in parts by weight: 3-20 parts of blocked isocyanate, 1-5 parts of water-soluble epoxy resin, 40-240 parts of latex, 3-30 parts of maleic anhydride polybutadiene and 65-350 parts of pure water.

2. The environment-friendly dipping solution as defined in claim 1, wherein the blocked isocyanate is prepared from a blocking agent and isocyanate, and the isocyanate is polyisocyanate containing more than two-NCO functional groups; the blocking agent is one or the mixture of more than two of caprolactam, 3, 5-dimethylpyrazole, acetone oxime, butanone oxime, cyclohexanone oxime and sodium bisulfite.

3. The environmentally friendly dipping solution of claim 2, wherein the isocyanate is diphenylmethane diisocyanate, toluene diisocyanate trimer, isophorone diisocyanate, hexamethylene diisocyanate, or hexamethylene diisocyanate trimer.

4. The environment-friendly dipping solution as defined in claim 3, wherein the blocked isocyanate is in the form of aqueous dispersion, aqueous emulsion or powder.

5. The environment-friendly glue solution as defined in claim 1, wherein the latex is butyl pyridine latex, butyl pyridine latex or hydroxy butyl pyridine latex.

6. The environment-friendly glue solution as claimed in any one of claims 1 to 5, characterized by comprising the following components in parts by weight: 3-16 parts of blocked isocyanate, 1-4.5 parts of water-soluble epoxy resin, 45-210 parts of butadiene-pyridine latex, 4.5-21 parts of maleic anhydride polybutadiene and 70-320 parts of pure water.

7. The method for preparing the environment-friendly glue solution as defined in claim 1, comprising the following steps:

under the condition of low-speed stirring,

1) adding the blocked isocyanate into a part of pure water, mixing, sequentially adding the water-soluble epoxy resin, the maleic anhydride polybutadiene and the butadiene-pyridine latex, and mixing to obtain a mixture;

2) adding the other part of pure water into the mixture obtained in the step 1), and mixing to obtain the gum dipping solution.

8. The method for preparing environment-friendly glue solution according to claim 7, wherein the rotation speed of low-speed stirring is 100-200 rpm.

Technical Field

The invention belongs to the technical field of gum dipping cord fabrics, canvases, ropes and rubber tube yarns, and particularly relates to an environment-friendly gum dipping solution and a preparation method thereof.

Background

At present, products such as chinlon 6, chinlon 66, terylene, aramid fiber, spandex and the like are widely applied in various fields due to unique performances. In the process of forming cord fabric, canvas, cotton rope and rubber tube yarn, the gum dipping process is a crucial link, and the gum dipping process directly influences the quality and the service performance of products. At present, according to the characteristics of substances, the existing impregnation process mostly adopts a single bath method or a double bath method, in the process, RFL impregnation liquid is an indispensable impregnation raw material, phenolic resin formed by resorcinol and formaldehyde in the RFL impregnation liquid is also an excellent adhesive which is difficult to replace, in addition, the RFL impregnation liquid needs to be prepared at present, a special class A explosion-proof preparation workshop needs to be arranged for the reaction of the resorcinol and the formaldehyde in the impregnation process, and in the preparation process and the impregnation process, phenol and aldehyde bring a series of problems of environmental protection, safety, occupational health and the like, and the problems can not be ignored.

In 2014, the REACH regulation of European Union proposed that resorcinol, formaldehyde and other substances are strictly prohibited from being used in the production of dipped cord fabric; in 2016, 12 and 26 days, the department of industry and informatization, the department of science and technology, and the department of environmental protection jointly issued "catalogue of substitutes for toxic and harmful raw materials (products) encouraged by the nation (2016 edition)" (the book of industry and communications department [ 2016 ] 398), phenolic resin impregnation liquid (RFL) was also listed as a substitute. Therefore, the development of environment-friendly phenolic-free green impregnation liquid is imperative.

Disclosure of Invention

The invention aims to provide an environment-friendly gum dipping solution, and simultaneously provides a corresponding preparation method thereof, which is another aim of the invention.

Based on the purpose, the invention adopts the following technical scheme:

an environment-friendly glue dipping solution comprises the following components in parts by weight: 3-20 parts of blocked isocyanate, 1-5 parts of water-soluble epoxy resin, 40-240 parts of butadiene-pyridine latex, 3-30 parts of maleic anhydride polybutadiene and 65-350 parts of pure water.

The blocked isocyanate is prepared from a blocking agent and isocyanate, wherein the isocyanate is polyisocyanate containing more than two-NCO functional groups; the blocking agent is one or the mixture of more than two of caprolactam, 3, 5-dimethylpyrazole, acetone oxime, butanone oxime, cyclohexanone oxime and sodium bisulfite.

The isocyanate is diphenylmethane diisocyanate, toluene diisocyanate trimer, isophorone diisocyanate, hexamethylene diisocyanate or hexamethylene diisocyanate trimer.

The dosage form of the blocked isocyanate is water dispersion, water emulsion or powder.

The latex is butyl pyridine latex, butadiene-styrene pyridine latex or hydroxyl butadiene-styrene-pyridine latex.

The environment-friendly glue dipping solution comprises the following components in parts by weight: 3-16 parts of blocked isocyanate, 1-4.5 parts of water-soluble epoxy resin, 45-210 parts of butadiene-pyridine latex, 4.5-21 parts of maleic anhydride polybutadiene and 70-320 parts of pure water.

The method for preparing the environment-friendly dipping solution comprises the following steps:

under the condition of low-speed stirring,

1) adding the blocked isocyanate into a part of pure water, mixing, sequentially adding the water-soluble epoxy resin, the maleic anhydride polybutadiene and the butadiene-pyridine latex, and mixing to obtain a mixture;

2) adding the other part of pure water into the mixture obtained in the step 1), and mixing to obtain the gum dipping solution.

The rotation speed of the low-speed stirring is 100-200 rpm.

Compared with the prior art, the invention has the following beneficial effects:

1. the dipping solution of the invention does not contain resorcinol, formaldehyde and derivatives thereof, the used raw material substances are not in the category of dangerous chemicals, the dipping solution is green and environment-friendly, the water solubility and the water dispersibility of the dipping solution are good, the sticking roller is less, the waste glue is less generated, and the requirements of related departments of European Union and China are met; good effect is obtained in the application of the dipping process of cord fabrics of nylon 6, nylon 66, terylene and the like, the physical property index of the obtained product reaches or even exceeds the national high-grade product standard, and the substitution problem of RFL dipping solution is solved;

2. the impregnation liquid has strong practicability, can be directly applied to the existing impregnation process and equipment, reduces the expenditure of manpower, material resources and financial resources caused by equipment and process transformation caused by the change of the impregnation liquid, and is easy to popularize and use.

Detailed Description