1、 外文资料翻译 Water-borne polyurethane The water-borne polyurethane resin already gradually replace the solvent-based, become the important direction of polyurethane industry. The water-borne polyurethane can be widely used in coating, adhesive, coated fabric and finishing agent, leather finishing agent,
2、paper surface treated and fiber surface treated. This project funded by the national natural science funds research and ten years of research, has become a mature anion type polyurethane emulsion and cation emulsifying since emulsified polyurethane emulsion type synthesis modification since the tech
3、nology, can provide 1 tons/day water-borne 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 combined with hi
4、gh technical preparation nanometer heterozygous water-borne polyurethane. The water-borne polyurethane whole synthetic process can be divided into two phases. The first stage for, namely the advance gradually polymerization oligomer glycol, chain extension agent, water-based monomer and diisocyanate
5、 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
6、 long, but is developing very fast. The water-borne polyurethane including PU solution, water dispersed and water emulsion three, colloidal system for binary, polyurethane (PU) particles scattered the prototype, also have called studied.it waterborne PU or water-based PU. Due to the diversity of pol
7、yurethane materials and formula, the water-borne polyurethane development 40 years or so of time, people have developed many kinds of preparation methods and preparation formula. The water-borne polyurethane varities, can press a variety of methods classification. 1. With appearance points The water
8、-borne 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 water-borne polyurethane adhesive according to using single-component forms can be
9、 divided into two categories. And two components Can use directly without crosslinking agent, or can be used to obtain the required performance water-borne polyurethane called single-component aqueous pu adhesives. If used alone cannot obtain the desired performance, must add crosslinking agent； Or
10、general single-component water-borne polyurethane after adding cross-linking agent can improve adhesive ability, in these cases, the water-borne polyurethane main agent and composed of crosslinking agent they will two-component system. 3. To the nature points hydrophilic groups According to polyuret
11、hane molecular side chain or main chain, namely whether it contains ion groups of polymer (from whether ionic norbornene-type homopolymers), can be divided into anionic water-borne polyurethane type, cationic of non-ionic,. Contain anion and cation water-borne polyurethane (also called from water-bo
12、rne polyurethane norbornene-type homopolymers type). 4. With polyurethane materials points According to the main oligomer polyols types can be divided into polyether type, polyester and polyolefin type etc, are refers to using polyether polyols, polyester polyols, like polybutadiene glycol as oligom
13、er polyols water-borne polyurethane made. And polyether - polyester, polyether - like polybutadiene mixed with polyurethane isocyanate raw material points, can be divided into aromatic isocyanate type, aliphatic isocyanate type, fat alicyclic isocyanate type. According to the specific material also
14、can be divided, such as TDI type, HDI type, etc. 5. According to the overall structure of the polyurethane resin division (1) by raw material and structure can be divided into polyurethane emulsion, vinyl polyurethane emulsion, much isocyanate emulsion, closing polyurethane emulsion. Polyurethane em
15、ulsion refers to the oligomer polyols and extender chain agent and diisocyanate as raw materials, usually methods of polyurethane dispersed in water preparation by the formation of the emulsion. Vinyl polyurethane emulsion generally refers to in vinyl resin emulsion aqueous or addisocyanate emulsion
16、, is formed two-component system. Many isocyanate emulsion containing hydrophilic groups refers to how isocyanate emulsified in water, or more isocyanate organic solution containing emulsifier dispersed in the water, but also the emulsion formed two-component use namely match system, applicable peri
17、od shorter. Closing isocyanate emulsion refers to molecule containing blocked isocyanate groups of polyurethane emulsion, is a stable single-component system. In the preparation of polyurethane emulsion introduced when company closed isocyanate group, also can be made into closed isocyanate groups f
18、or high content of emulsion, blending with other emulsion system, up crosslinking role, moisture volatilizes cross-linking after heating (2) polyurethane emulsion also can be divided for polyurethane emulsion and polyurethane emulsion, the latter urea - means that the polyurethane dispersed in water and through water or 2 amine extender chain, formed the polyurethane emulsion, essentially generated by urea, but because - prepolymerization body for more common scattered legal system, the custom of polyurethane emulsion is called the majority.
