bwin中文地址

The company solemnly promises: free on-site installation and commissioning of the entire machine, free training of technical staff, one year warranty and lifetime maintenance!
  • ●异氰酸酯与聚脲弹性体性能的关系 [08-17] The relationship between isocyanate and polyurea elastomer performance
  • ●购买防水涂料需要重点关注的性能指 [05-10] ● The performance indicators that need to focus on when buying waterproof coatings
  • ●聚氨酯保温材料行业未来发展前景可 [05-12] ● The future development prospects of polyurethane thermal insulation material industry are promising
  • ●「聚氨酯产品」地铁防水工程复合防 [07-24] ● "Polyurethane Products"
  • ●哪些因素会影响聚氨酯发泡质量 [05-07] ● What factors will affect the quality of polyurethane foam
  • ●详解聚氨酯发泡机操作规程 [05-07] ● Detailed operation rules of polyurethane foaming machine
  • ●怎么解决聚氨酯发泡机空泡现象 [05-08] ● How to solve the cavitation phenomenon of polyurethane foaming machine
  • ●使用聚氨酯喷涂机白料时要细致什么 [05-10] ● What to be careful when using polyurethane sprayer white material
  • ●保温材料阻燃性能不合格成冷库安全 [05-05] Insufficient flame retardant performance of insulation materials to become safe in cold storage
  • ●温度控制是解决聚氨酯发泡机的空泡 [05-08] ● Temperature control is to solve the cavitation of polyurethane foaming machine
  • ●如何在屋顶操作聚氨酯喷涂 [09-10] ● How to operate polyurethane spray on the roof
  • ●聚氨酯发泡机混合器中物料的流场分 [05-18] ● Flow field analysis of materials in mixer of polyurethane foaming machine
  • ●现代建筑工地为什么要用【聚氨酯发 [03-21] ● Why use modern polyurethane construction site
  • ●喷涂硬泡聚氨酯外墙防水保温施工流 [05-16] ● Waterproof thermal insulation construction flow for spraying rigid foam polyurethane exterior
  • ●必看! [05-10] ● Must see! The relationship between waterproof coating thickness and waterproof life
  • ●聚氨酯喷涂作业时“应该”和“不应 [10-29] ● "should" and "should not" when spraying polyurethane
  • ●影响聚氨酯喷涂施工出方率的几个因 [10-29] ● Several factors affecting the yield of polyurethane spraying construction
  • ●聚氨酯喷涂施工的常见问题及原因 [10-29] ● Common problems and reasons of polyurethane spraying construction
  • ●聚氨酯防腐应用以及储存 [10-21] ● Application and storage of polyurethane anticorrosion
  • ●聚氨酯防腐漆在出现剥落现象 [10-21] ● The polyurethane anticorrosive paint is peeling off
  • ●聚氨酯防腐的主要涂覆方法 [10-21] ● Main coating methods for polyurethane anticorrosion
  • ●聚氨酯防腐的涂装工艺 [10-21] ● Polyurethane anticorrosive coating process
  • ●如何提高聚氨酯防腐的性能 [10-21] ● How to improve the anticorrosive performance of polyurethane
  • ●聚氨酯防腐适用领域以及特点 [10-21] ● Application areas and characteristics of polyurethane anticorrosion
  • ●聚氨酯高压喷涂设备的主要优点 [10-19] ● Main advantages of high pressure polyurethane spray equipment
  • ●聚氨酯发泡机选购前的对比方法 [09-19] ● Comparison method before purchasing polyurethane foaming machine
  • ●聚氨酯发泡机特点和工作流程介绍 [09-19] ● Introduction of polyurethane foam machine characteristics and work flow
  • ●聚氨酯高压发泡机和低压发泡机的区 [08-08] ● The area of polyurethane high pressure foaming machine and low pressure foaming machine
  • ●「耐高温材料」聚氨酯硬泡的发展方 [07-25] ● Development method of "high temperature resistant material" polyurethane rigid foam
  • ●「ws15」喷涂型聚氨酯应用指南 [07-25] ● "ws15" Spraying Polyurethane Application Guide
  • Relationship between isocyanate and polyurea elastomer
    来源:http://motokone.com发布时间: 2018-08-17 16:31 Author: Polyurethane foam machine Source: http: //motokone.com Published: 2018-08-17 16:31
    The presence of MDI isomers in the prepolymer has little effect on the gel time of the polyurea system, but it can significantly increase the fluidity of the polyurea material system. As shown in the test data in Table 2-6, with the increase of the content of MDI isomers, the mechanical properties such as hardness and tensile strength of polyurea materials decrease significantly.
    In summary, through the analysis of the relationship between the isocyanate, diluent, and R component chain extenders in the A component and the properties of the polyurea elastomer, considering the two factors of excellent gel time and excellent performance, formula 3 was selected as the pumping oil Anticorrosive polyurea coating formulation for corrosion resistance test.
    (1> Adding an appropriate amount of propylene carbonate ((PC) to the A component can not only reduce the viscosity and improve the mixing and improve the mixing efficiency of the system, but also make the polyurea system reaction proceed smoothly and improve the mechanical properties of the elastomer. Improve the leveling properties of the film. With the increase of the content of MDI isomers, the mechanical properties such as hardness and tensile strength of polyurea materials have decreased significantly.
    C2) When designing a good formula for the R component, consideration should be given to selecting a low-molecular chain extender with a suitable reaction rate; an increase in the amount of the chain extender increases the reaction speed of the polyurea system, and the gel time is significantly shortened. The influence of body mechanical properties is small, and the pre-control of gel time of sprayed polyurea elastomer can be achieved by adjusting the type and content of chain extender in the polyurea system formula.
    (3) When designing the polyurea formula, the influence of the following factors on the properties of the polyurea elastomer should also be considered, such as the isocyanate purpose index and functionality.
    Polyurethane high pressure foaming machine - small polyurethane foaming machine - polyurethane foaming machine price - polyurethane foaming machine manufacturer - polyurethane spraying equipment