描述

TPU原材料制造商

优异的附着力、低粘度、良好的抗挠曲性、优异的耐磨性、高光泽、优异的耐候性

TPU原材料制造商

产品详细信息

TPU原材料制造商

TPU的分类可以用不同的方式进行。根据软段结构可分为聚酯型TPU、聚醚型TPU和聚丁二烯型TPU

它们包含酯基、醚基或J烯基；根据所使用的异氰酸酯结构，可将其分为泛黄型（MDI、TODI、NDI、PPDI等）和非泛黄型（HDI、H12MDI等），根据硬段结构分为聚氨酯型和聚氨酯-尿素型。它们分别由

二醇链延伸或-=胺链延伸组成

根据有无交联，可分为全热塑性和半热塑性。前者为纯线性结构，无交联键；后者含有少量四氢苯甲酸

交联键，如酯

预聚合法是先将二异氰酸酯与大分子=乙醇反应一定时间，然后加入扩链剂生产TPU-分步法是将大分子二醇、二异氰酸酯酊剂和扩链剂同时混合并反应形成TPU。溶液聚合是先溶解二异氰酸酯，然后向试剂中加入大分子二醇，使其反应一定时间，最后加入扩链剂，生成TPU

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TPU Raw Material Manufacturer

Excellent adhesion,
Low viscosity,
Good flex resistance,
Excellent abrasion resistance,
High gloss,
Excellent weather resistance.

TPU Raw Material Manufacturer

Product Details

TPU raw material manufacturer

A classification of TPU

TPU can be classified in different ways. According to the soft segment structure, it can be divided into polyester type TPU, polyether type TPU and polybutadiene type TPU.

They contain ester groups, ether groups or J alkenyl groups; according to the isocyanate structure used, they can be divided into yellowing types (MDI, TODI, NDI,

PPDI, etc.) and non-yellowing type (HDI, H12MDI, etc.) are divided into urethane type and urethane urea type according to the hard segment structure. They are respectively composed of

Diol chain extension or -=amine chain extension is obtained.

According to the presence or absence of crosslinking, it can be divided into full thermoplastic and semi-thermoplastic. The former is a pure linear structure without crosslinking bonds; the latter contains a small amount of allophanic acid

Cross-linking bonds such as esters.

TPU raw material manufacturer

According to the synthesis process, it is divided into bulk polymerization and solution polymerization. In bulk polymerization, it can be divided into pre-polymerization method and one-step method according to the presence or absence of pre-reaction:

The prepolymerization method is to first react the diisocyanate with the macromolecule = alcohol for a certain period of time, and then add the chain extender to produce TPU;-the step method is

The macromolecular diol, diisocyanate tincture and chain extender are simultaneously mixed and reacted to form TPU. Solution polymerization is to dissolve the diisocyanate first

Add macromolecular diol to the agent to make it react for a certain time, and finally add chain extender to produce TPU

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