Polyurethane material, and preparation method and application thereof

A technology of polyurethane material and degree of polymerization, applied in the field of polyurethane material and its preparation, can solve the problems of restricting the sustainable development of polyurethane, harm to operators and the environment, and cytotoxicity affecting the application, etc., so as to achieve biodegradability and reduce production costs. , the effect of avoiding cytotoxicity problems

Active Publication Date: 2015-05-20
华南生物医用材料(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, isocyanate itself has strong toxicity, which will cause great harm to operators and the environment during its production and use. At the same time, the cytotoxicity of isocyanate itself also affects the application of this type of material in the biomedical field.
In addition, the production process of polyurethane is relatively long, and the organic additives used are inferior, which seriously wastes resources and energy, which greatly restricts the sustainable development of polyurethane industrial production.
[0004] Therefore, it is necessary to provide an environment-friendly polyurethane material and a preparation method thereof, so as to avoid environmental pollution problems caused by using isocyanates, etc.

Method used

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  • Polyurethane material, and preparation method and application thereof
  • Polyurethane material, and preparation method and application thereof
  • Polyurethane material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A preparation method of polyurethane material, comprising the following steps:

[0076] (1) Prepolymerization: Dissolve polylactic acid-based diol (molecular weight 1957g / mol, abbreviated as PDLLA diol) and CDI in anhydrous toluene at a molar ratio of 1:1.1, add stannous octoate, of which stannous octoate The mass ratio to PDLLA diol is 1:100, and the prepolymerization reaction is carried out at a reaction temperature of 75°C for 3.5 hours to obtain a prepolymer, which is an ester imidazole;

[0077] (2) Chain extension: After the reaction temperature in step (1) drops to room temperature, piperazine is added to the ester imidazole prepolymer in step (1) as a chain extender, and the chain extension is carried out at a reaction temperature of 35°C. The chain reaction was stopped for 5 hours to obtain a polyurethane material (PU), wherein the molar ratio of piperazine to polylactic acid-based diol was 0.1:1.

[0078] (3) The polyurethane material obtained in step (2) was...

Embodiment 2

[0086] A kind of preparation method of polyurethane material, operation step is the same as embodiment 1, and difference is: in step (1), the mol ratio of polylactic acid base diol used and CDI is 1:1.3, and in step (2), piperazine The molar ratio to polylactic acid-based diol is 0.3:1.

Embodiment example 2

[0087] The yield of the polyurethane material (PU) prepared in Example 2 is 70%, and its structure is linear, as shown in the structural formula (I), where the degree of polymerization k=25. The molecular weight of PU measured and calculated by a viscometer is 48538, and the molecular weight of PU is somewhat higher than that in Example 1.

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Abstract

The invention discloses a polyurethane material and a preparation method thereof. The preparation method comprises the following steps: carrying out prepolymerization reaction on polydibasic alcohol or polydiamine and excessive N'N-carbonyldiimidazole to obtain a prepolymer of which both ends are closed by imidazolyl groups, and carrying out chain extension reaction on the prepolymer and micromolecule diamine or micromolecule dibasic alcohol through the imidazolyl groups on the two ends of the prepolymer to obtain the target polyurethane material. The obtained polyurethane material has high purity, and the molecular weight is 30000-90000. The method improves the traditional polyurethane synthesis technique, and uses the N'N-carbonyldiimidazole instead of the high-toxicity isocyanate, thereby effectively avoiding the environmental pollution and injuries to the human body due to the adoption of the isocyanate in the polyurethane production process.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyurethane material and its preparation method and application. Background technique [0002] Polyurethane, the full name of polyurethane (PU), is a class of polymers containing repeated carbamate groups (NHCOO) in the main chain, and can be widely used in the manufacture of rubber, plastics, adhesives, coatings, biomedical materials wait. [0003] At present, polyurethane grades are formed by addition polymerization of organic diisocyanates or diisocyanates and dihydroxy or dihydroxy compounds. However, isocyanate itself has strong toxicity, which will cause great harm to operators and the environment during its production and use. At the same time, the cytotoxicity of isocyanate itself also affects the application of this type of material in the biomedical field. In addition, the production process of polyurethane is relatively long, and the organic additives us...

Claims

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Application Information

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IPC IPC(8): C08G71/04
Inventor 阮长顺马宇飞李玉筱蒋立新潘浩波
Owner 华南生物医用材料(深圳)有限公司
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