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Preparation method of DDMBDX-PI/TPU with high transparency and easy processing molding

A DDMBDX-PI, easy-to-process technology, applied in the field of preparation of high-transparency and easy-to-process DDMBDX-PI/TPU, can solve the problems that the transparency of thermoplastic polyurethane needs to be improved

Active Publication Date: 2021-06-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an elastomer between plastic and rubber, thermoplastic polyurethane has both the hardness of plastic and the elasticity of rubber, and is widely used in various fields. However, the transparency of thermoplastic polyurethane needs to be improved at present.

Method used

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  • Preparation method of DDMBDX-PI/TPU with high transparency and easy processing molding
  • Preparation method of DDMBDX-PI/TPU with high transparency and easy processing molding
  • Preparation method of DDMBDX-PI/TPU with high transparency and easy processing molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of DDMBDX-PI / TPU with high transparency and easy processing and molding. The raw materials include: 52.75 parts of polytetrahydrofuran, 9.0 parts of 1,4-butanediol, 38.25 parts of diphenylmethane diisocyanate, Nucleating agent DDMBDX-PI0.1 part.

[0032] The molecular weight of the polytetrahydrofuran is between 1024-1056.

[0033] The 1,4-butanediol is a colorless viscous oily liquid with a molecular weight of 90.12 and a hydroxyl value of 1000-1200 mg KOH / g.

[0034] The catalyst is selected from organotin dibutyltin dilaurate.

[0035] The preparation of DDMBDX-PI: Pretreatment: Since propyl isocyanate can react with water, if there is water in the reaction system, it will affect the progress of the reaction, so it is necessary to fully remove water before the reaction. Before the reaction, put 10g DDMBDX into a vacuum drying oven to fully dry; put 5-10 fully dried 4A molecular sieves into 20ml of 1-methyl-2-pyrrolidone (NMP) solvent and seal t...

Embodiment 2

[0039] A preparation method of DDMBDX-PI / TPU with high transparency and easy processing and molding. The raw materials include: 52.75 parts of polytetrahydrofuran, 9.0 parts of 1,4-butanediol, 38.25 parts of diphenylmethane diisocyanate, Nucleating agent DDMBDX-PI0.15 parts.

[0040] The molecular weight of the polytetrahydrofuran is between 1024-1056.

[0041] The 1,4-butanediol is a colorless viscous oily liquid with a molecular weight of 90.12 and a hydroxyl value of 1000-1200 mg KOH / g.

[0042] The catalyst is selected from organotin dibutyltin dilaurate.

[0043] The preparation of DDMBDX-PI: Pretreatment: Since propyl isocyanate can react with water, if there is water in the reaction system, it will affect the progress of the reaction, so it is necessary to fully remove water before the reaction. Before the reaction, put 10g DDMBDX into a vacuum drying oven to fully dry; put 5-10 fully dried 4A molecular sieves into 20ml of 1-methyl-2-pyrrolidone (NMP) solvent and seal...

Embodiment 3

[0047] A preparation method of DDMBDX-PI / TPU with high transparency and easy processing and molding. The raw materials include: 52.75 parts of polytetrahydrofuran, 9.0 parts of 1,4-butanediol, 38.25 parts of diphenylmethane diisocyanate, Nucleating agent DDMBDX-PI0.2 parts.

[0048] The molecular weight of the polytetrahydrofuran is between 1024-1056.

[0049] The 1,4-butanediol is a colorless viscous oily liquid with a molecular weight of 90.12 and a hydroxyl value of 1000-1200 mg KOH / g.

[0050] The catalyst is selected from organotin dibutyltin dilaurate.

[0051] The preparation of DDMBDX-PI: Pretreatment: Since propyl isocyanate can react with water, if there is water in the reaction system, it will affect the progress of the reaction, so it is necessary to fully remove water before the reaction. Before the reaction, put 10g DDMBDX into a vacuum drying oven to fully dry; put 5-10 fully dried 4A molecular sieves into 20ml of 1-methyl-2-pyrrolidone (NMP) solvent and seal ...

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Abstract

The invention belongs to the field of thermoplastic elastomers, and particularly relates to a preparation method and application of DDMBDX-PI / TPU with high transparency and easy processing molding. A nucleating agent DDMBDX-PI is added into a thermoplastic polyurethane elastomer matrix, and the DDMBDX-PI has the effects of providing heterogeneous nucleation points and playing a role in crystal nucleation in resin, so that original homogeneous nucleation is changed into heterogeneous nucleation, the number of the crystal nucleation in a crystallization system is increased, the number of microcrystals is increased, the number of spherocrystals is reduced, the size of TPU crystals is reduced, the light transmittance is increased, the crystallization speed and the crystallization temperature are correspondingly increased, the polymer processing and forming time is shortened, the forming is quickened, and the mechanical property of the TPU is not reduced while the transparency and the formability of the TPU are improved.

Description

technical field [0001] The invention belongs to the field of thermoplastic elastomers, and in particular relates to a preparation method and application of DDMBDX-PI / TPU with high transparency and easy processing and molding. Background technique [0002] In the field of materials, the requirements for the transparency of materials are getting higher and higher. The advantage of transparent materials is that they can be used with various colorants in subsequent processing, so transparent materials can be used in a wide range of applications. As an elastomer between plastic and rubber, thermoplastic polyurethane has both the hardness of plastic and the elasticity of rubber, and is widely used in various fields. However, the transparency of thermoplastic polyurethane needs to be improved at present. [0003] In order to shorten the processing and molding time and improve production efficiency of thermoplastic polyurethane elastomers in the production process, it is necessary t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08K5/29
CPCC08G18/3206C08G18/4854C08G18/6674C08K5/29
Inventor 郑玉婴陈玉环
Owner FUZHOU UNIV
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