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Thermoplastic polyurethane and use thereof

A technology of thermoplastic polyurethane and polyurethane, which is applied in the field of thermoplastic polyurethane, can solve the problems of hard polyurethane film, inability to balance moisture permeability and water pressure resistance, reduce elasticity and softness, etc., and achieve the effect of both heat resistance and elasticity

Inactive Publication Date: 2010-08-04
FAR EASTERN NEW CENTURY COPRRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyurethane products made of thermoplastic polyurethane (Thermoplastic Polyurethane; TPU), such as films, have been widely used in various products in life due to their good waterproof and moisture permeability, such as clothes, raincoats, medical protective clothing, Tents, shoes, dressings, etc., but at present this kind of film has the following disadvantages: (1) hard texture and poor elastic recovery rate; (2) insufficient heat resistance at high temperature; (3) poor solvent resistance
[0007] In addition, Taiwan patent announcement number 372933 also disclosed a polyurethane resin with moisture permeability and water resistance and its preparation method, which is to carry out successive polymerization reactions with hydrophilic and hydrophobic raw materials and diisocyanates, mainly to Solve the shortcomings of conventional polyurethane resins that cannot balance moisture permeability and water pressure resistance, and the chain extenders used in this previous case are diols
[0008] As mentioned above, in the industrial production of polyurethane, diols such as ethylene glycol, propylene glycol or butanediol are generally added as chain extenders to improve the mechanical properties of polyurethane products, but reduce their elasticity and softness
In addition, a small number of people further add aliphatic diamines. Although the effect of adding aliphatic diamines is better than adding diols, it is difficult to operate in the manufacturing process and the quality varies
[0009] Therefore, it is difficult to solve the problems of hard texture, poor elastic recovery rate and insufficient heat resistance at the same time for the polyurethane film prepared by the current technology. demand exists

Method used

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  • Thermoplastic polyurethane and use thereof
  • Thermoplastic polyurethane and use thereof
  • Thermoplastic polyurethane and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] thermoplastic polyurethane 1

[0041] The formulation of Polyurethane 1 is as follows:

[0042] EO / PO copolymer (A) accounts for 43.3wt% of total raw material; MDI (purchased from Nipponpolyurethane) accounts for 27.5wt% of total raw material; PTMO (purchased from Formosa Plastics Asahi Company, molecular weight is 1000) accounts for 20.1wt% of total raw material 1,4-BG (purchased from BASF company) accounts for 7.0wt% of total raw material; Aromatic diamine accounts for 0.37wt% of total raw material, and all the other are catalyst (T-12) as shown in table 1; Antioxidant ( 1010), anti-ultraviolet agent (Q-287) and anti-sticking agent (PSFLOW 7501) and other auxiliary materials.

[0043] The preparation steps of polyurethane 1 are as follows:

[0044] (a) Melt the required amount of EO / PO, MDI, PTMO, and 1,4-BG according to the above formula and pump them into the working tank; (refer to the feed rate shown in Table 1)

[0045] (b) Stir the EO / PO copolymer, MDI, PTMO...

Embodiment 2

[0048] thermoplastic polyurethane 2

[0049] The formulation of Polyurethane 2 is as follows:

[0050] EO / PO(A) accounts for 52.7wt% of the total raw materials; MDI accounts for 26.2wt% of the total raw materials; PTMO accounts for 12.5wt% of the total raw materials; 1,4-BG accounts for 7.0wt% of the total raw materials; 0.37wt% of the raw material, and the rest are auxiliary materials such as catalyst, antioxidant, antiultraviolet agent and antisticking agent.

[0051] The preparation steps of polyurethane 2 are as follows:

[0052] The polyurethane 2 of the present invention was prepared by the same steps as in Example 1 with the raw materials of the above formula.

[0053] The results of various physical property tests of the polyurethane 2 prepared in this example are as follows: the melting point is 165° C.; the melting point index (at 210° C.) MI=26.

Embodiment 3

[0054] thermoplastic polyurethane 3

[0055] The formula of polyurethane 3 is as follows:

[0056] EO / PO(A) accounts for 52.2wt% of the total raw materials; MDI accounts for 25.9wt% of the total raw materials; PTMO accounts for 12.3wt% of the total raw materials; 1,4-BG accounts for 7.0wt% of the total raw materials; 0.37wt% of the raw material, and the rest are auxiliary materials such as catalyst, antioxidant, anti-ultraviolet agent and anti-sticking agent. In this embodiment, another anti-sticking agent EBS is further added.

[0057] The preparation steps of polyurethane 3 are as follows:

[0058] The polyurethane 3 of the present invention was prepared by the same steps as in Example 1 with the raw materials of the above formula.

[0059] The results of various physical property tests of the polyurethane 3 prepared in this example are as follows: melting point is 170° C.; melting point index (at 210° C.) MI=40; number average molecular weight Mn=138,000; weight average ...

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Abstract

The present invention is one kind of thermoplastic polyurethane with weight average molecular weight of 200-800 KD. The thermoplastic polyurethane is prepared with one or two kinds of diisocyanate, one or several kinds of polyol of molecular weight 1000-8000, and chain extender comprising one kind of low molecular weight diol and one kind of aromatic diamine. The thermoplastic polyurethane may beapplied in producing film and spun product possessing high heat resistance, high elasticity and high flexibility.

Description

technical field [0001] The present invention relates to a kind of thermoplastic polyurethane, especially refers to a thermoplastic polyurethane which is improved by adding aromatic diamine as a chain extender to improve heat resistance, elasticity and softness. Background technique [0002] Polyurethane products made of thermoplastic polyurethane (Thermoplastic Polyurethane; TPU), such as films, have been widely used in various products in life due to their good waterproof and moisture permeability, such as clothes, raincoats, medical protective clothing, Tents, shoes, dressings, etc., but currently this kind of film has the following disadvantages: (1) hard texture and poor elastic recovery rate; (2) insufficient heat resistance at high temperature; (3) poor solvent resistance. Among them, the problem of poor solvent resistance can be improved by additives, but such additives often make the softness of the polyurethane film worse, and the problems of elasticity and heat res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/72C08K5/18
CPCC08G18/4854C08G18/3243C08G18/3206C08G18/6674C08G18/6685C08G18/4837C08G18/0895
Inventor 欧福文郭若斌
Owner FAR EASTERN NEW CENTURY COPRRATION
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