外文翻譯--水性聚氨酯(已修改)
2025-01-27 02:12 本頁面
【正文】 外文資料翻譯Waterborne polyurethane The waterborne polyurethane resin already gradually replace the solventbased, bee the important direction of polyurethane industry. The waterborne polyurethane can be widely used in coating, adhesive, coated fabric and finishing agent, leather finishing agent, paper surface treated and fiber surface treated. This project funded by the national natural science funds research and ten years of research, has bee a mature anion type polyurethane emulsion and cation emulsifying since emulsified polyurethane emulsion type synthesis modification since the technology, can provide 1 tons/day waterborne polyurethane production capacity of production set of technology and equipment technology. This project can be based on user needs, for formula design of waterborne polyurethane with adjustment to meet requirements of actual use, and can be bined with high technical preparation nanometer heterozygous waterborne polyurethane. The waterborne polyurethane whole synthetic process can be divided into two phases. The first stage for, namely the advance gradually polymerization oligomer glycol, chain extension agent, waterbased monomer and diisocyanate through a solution gradually polymerization generating relative molecular mass for l000 middleweight of waterborne polyurethane。 The second stage for neutralization of prepolymerization body in the water after the scattered. Waterborne PU due to its environmental protection, although history is not long, but is developing very fast. The waterborne polyurethane including PU solution, water dispersed and water emulsion three, colloidal system for binary, polyurethane (PU) particles scattered the prototype, also have called waterborne PU or waterbased PU. Due to the diversity of polyurethane materials and formula, the waterborne polyurethane development 40 years or so of time, people have developed many kinds of preparation methods and preparation formula. The waterborne polyurethane varities, can press a variety of methods classification. 1. With appearance points The waterborne polyurethane polyurethane emulsion, polyurethane can be divided into dispersed, pu solution. The actual application is the largest polyurethane emulsion and dispersed, 2. According to the use form of points The waterborne polyurethane adhesive according to using singleponent forms can be divided into two categories. And two ponents Can use directly without crosslinking agent, or can be used to obtain the required performance waterborne polyurethane called singleponent aqueous pu adhesives. If used alone cannot obtain the desired performance, must add crosslinking agent。 Or general singleponent waterborne polyurethane after adding crosslinking agent can improve adhesive ability,
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