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Preparation method of organosilicon thermoplastic polyurethane

A thermoplastic polyurethane and organosilicon technology, applied in the field of preparation of organosilicon thermoplastic polyurethane, can solve the problems of difficult adjustment, complicated operation process, general physical and mechanical properties, etc., and achieve excellent hydrophobicity, low temperature resistance, and good mechanical properties. Effect

Active Publication Date: 2017-04-19
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] U.S. Patent US 006313254 B1 discloses the preparation, composition and performance of a polysiloxane-containing polyurethane elastomer. The invention uses MDI / BDO as the hard segment, and at least one polysiloxane macromolecular diol and at least one soft segment A kind of polyether / polycarbonate macromolecule diol, the physicomechanical performance of the product obtained is general, and the operating process of this invention is complicated
[0005] Chinese patent CN104448231A discloses a preparation method, product and application of a polyether silicone block polyurethane material. The invention adopts a two-step method, using MDI / BDO as the hard segment, and polyethylene oxide-polydimethylene as the soft segment. Based on siloxane-polyethylene oxide (PEO-PDMS-PEO), the physical and mechanical properties of the resulting product are not good, and the invention is difficult to easily adjust according to different compositions, which has certain limitations
[0006] Only by adjusting the ratio and molecular structure of the formula can not fully meet the needs of material preparation, therefore, how to prepare silicone thermoplastic polyurethane better and easily is a technical problem that those skilled in the art need to solve at present

Method used

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  • Preparation method of organosilicon thermoplastic polyurethane
  • Preparation method of organosilicon thermoplastic polyurethane
  • Preparation method of organosilicon thermoplastic polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Raw materials for the preparation of silicone thermoplastic polyurethanes:

[0035] 1) Diphenylmethane diisocyanate;

[0036] 2) Macromolecular silicone containing active hydrogen:

[0037]

[0038] where Q 1 and Q2 for -CH 3 , n is 10, X is -C 3 h 6 OC 2 h 4 -OH;

[0039] 3) polytetrahydrofuran diol, the average molecular weight is 1000g / mol;

[0040] 4) Chain extender: 1,4-butanediol;

[0041] The preparation method comprises the following steps:

[0042] Step 1. At a temperature of 80°C, sequentially add active hydrogen-containing macromolecular silicone and polytetrahydrofuran diol to diphenylmethane diisocyanate to react to obtain an isocyanate-terminated prepolymer;

[0043] Step II. Uniformly mix the prepolymer obtained in Step I with 1,4-butanediol, pour the mixture and mature it at 100° C. for 18 hours to obtain silicone thermoplastic polyurethane.

[0044] The mass fraction of macromolecular organosilicon containing active hydrogen in the raw mat...

Embodiment 2

[0046] Raw materials for the preparation of silicone thermoplastic polyurethanes:

[0047] 1) Toluene diisocyanate;

[0048] 2) Macromolecular silicone containing active hydrogen:

[0049]

[0050] where Q 1 and Q 2 for n is 2, X is -C 5 h 10 -OH;

[0051] 3) Polyphthalate-1,6-hexanediol, the average molecular weight is 1000g / mol;

[0052] 4) Chain extender: ethylene glycol;

[0053] The preparation method comprises the following steps:

[0054] Step I. At the temperature of 80°C, simultaneously add the macromolecular silicone containing active hydrogen and poly-1,6-hexanediol phthalate diol to toluene diisocyanate, and the macromolecular silicone containing active hydrogen per unit time The mass ratio of molecular organosilicon to poly-1,6-hexanediol phthalate diol is 0.3, and the isocyanate group-terminated prepolymer is obtained after the reaction;

[0055] Step II. Uniformly mix the prepolymer obtained in Step I with ethylene glycol, pour the mixture and matu...

Embodiment 3

[0058] Raw materials for the preparation of silicone thermoplastic polyurethanes:

[0059] 1) a mixture of isophorone diisocyanate and toluene diisocyanate;

[0060] 2) Macromolecular silicone containing active hydrogen:

[0061]

[0062] where Q 1 and Q 2 for -CH 3 , n is 50, X is -OH;

[0063] 3) polytetrahydrofuran diol, the average molecular weight is 600g / mol;

[0064] 4) Chain extender: 1,6-hexanediol;

[0065] The preparation method comprises the following steps:

[0066] Step I. At the temperature of 90°C, simultaneously add the macromolecular silicone containing active hydrogen and polytetrahydrofuran diol to the mixture of isophorone diisocyanate and toluene diisocyanate, and the macromolecular silicone containing active hydrogen per unit time The mass ratio added to polytetrahydrofuran diol is 6, and the isocyanate group-terminated prepolymer is obtained after the reaction;

[0067] Step II. Uniformly mix the prepolymer obtained in Step I with 1,6-hexaned...

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Abstract

The invention discloses a preparation method of organosilicon thermoplastic polyurethane. The preparation method comprises the following steps: I, mixing macromolecular organosilicon containing reactive hydrogen, other macromolecular compounds containing reactive hydrogen and diisocyanate according to a certain mode at the temperature of 50-90 DEG C, and reacting to obtain an isocyanate-terminated prepolymer; and II, uniformly mixing the prepolymer obtained in the step I and a micromolecular chain extender, pouring the mixture and curing. The organosilicon thermoplastic polyurethane prepared by the method has good mechanical properties, and also has excellent hydrophobicity and low temperature resistance.

Description

technical field [0001] The invention relates to a preparation method of organosilicon thermoplastic polyurethane. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a polymer synthetic material with excellent comprehensive properties. It has excellent mechanical properties of high strength, high elasticity, high wear resistance and high flexibility, and is resistant to oil, solvents and chemicals. There are many varieties of TPU materials such as films, pipes, shoe materials, wires, cables, sheets, etc., so it can be widely used in various fields. TPUs can be produced stepwise (prepolymer metering method) or by reacting all components simultaneously in one stage (one-step metering method). [0003] Organosilicon is a general term for many polymer compounds containing silicon, among which polyorganosiloxane is the most widely used. Silicone TPU is prepared by introducing organosilicon into polyurethane, which has excellent mechanical properties of TP...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/75C08G18/73C08G18/66C08G18/61C08G18/42C08G18/44C08G18/48C08G18/50C08G18/12C08G18/32
CPCC08G18/12C08G18/4009C08G18/4018C08G18/4211C08G18/4238C08G18/4277C08G18/44C08G18/4854C08G18/5024C08G18/61C08G18/724C08G18/73C08G18/755C08G18/758C08G18/7614C08G18/7671C08G18/3206C08G18/3234
Inventor 周明杨杰黄岐善
Owner WANHUA CHEM GRP CO LTD
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