外文翻譯--水性聚氨酯-在線瀏覽
2025-03-04 02:12本頁面
【正文】 thane 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。 (2) the different acid ester containing closed waterborne pu coatings. The coating film raw materials by many isocyanate ponents and two parts containing hydroxyl ponents. Many isocyanate be phenol or other including single functional pounds have closed lively hydrogen atoms, so two parts can close pack without reaction, a single ponent coating, and have good storage stability. Many isocyanate ponents and phenol, malonates, caprolactam reacts blocker such as ammonia ester keys, and ammonia ester keys on heating and cracking formation isocyanate, again with hydroxyl the reactions that produce pu position. So the closing polyurethane coating film is
公司管理相關(guān)推薦
鄂ICP備17016276號(hào)-1