Preparation method of low-hydrophilicity polyurethane film

A polyurethane film and hydrophilic technology, applied in the field of polyurethane film preparation, can solve the problem of easily reducing the service life of the polyurethane film, and achieve the effects of increasing slip displacement, reducing water contact angle, and good mechanical properties

Inactive Publication Date: 2020-08-04
含山县领创新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyurethane film has many excellent properties, but the polyurethane film prepared by the prior art has higher hydrophilicity. High hydrophilicity will easily reduce the service life of polyurethane membrane

Method used

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  • Preparation method of low-hydrophilicity polyurethane film
  • Preparation method of low-hydrophilicity polyurethane film
  • Preparation method of low-hydrophilicity polyurethane film

Examples

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preparation example Construction

[0032] A kind of preparation method of the polyurethane membrane of low hydrophilicity, comprises the following steps:

[0033] (1) Add organic alcohol, dibasic acid, and catalyst to the reaction kettle, and react at 150-155°C to prepare intermediate 1;

[0034] (2) Prepare a surfactant solution, then add sodium silicate sol into the surfactant solution, and stir at high speed to obtain a composite solution;

[0035] (3) Add graphene to the composite solution obtained above, continue stirring at high speed, then add hydrogen peroxide, heat, keep warm for 2-3 hours, then dry to constant weight, wash with water, and dry to constant weight, get composite particles;

[0036] The average particle size of graphene is 80nm;

[0037] (4) Add intermediate 1 to the reaction kettle, then add 4,4-diphenylmethane diisocyanate, heat to 82-85°C under the protection of an inert atmosphere, keep warm for reaction, and then add composite particles and butane Diol, add dimethylformamide again...

Embodiment 1

[0080] A kind of preparation method of the polyurethane membrane of low hydrophilicity, comprises the following steps:

[0081] (1) Add organic alcohol, dibasic acid, and catalyst to the reaction kettle, and react at 155°C to prepare intermediate 1. The mixing ratio of the organic alcohol, dibasic acid, and catalyst is 1.5:1:0.07. The organic alcohol is obtained by mixing lauryl alcohol and sorbitol in a mass ratio of 1:3; the dibasic acid is adipic acid; the catalyst is butyltin oxide;

[0082] (2) Prepare a surfactant solution, then add sodium silicate sol into the surfactant solution, stir at high speed to obtain a composite solution, and the surfactant solution is dioctyl sulfosuccinate sodium solution;

[0083] Wherein, the mass fraction of dioctyl sodium sulfosuccinate solution is 3%. The mixing volume ratio of sodium silicate sol to surfactant solution is 1:1; the molar ratio of sodium silicate to sodium succinate sulfonate is 1:1.

[0084] (3) Add graphene to the com...

Embodiment 2

[0090] A kind of preparation method of the polyurethane membrane of low hydrophilicity, comprises the following steps:

[0091] (1) Add organic alcohol, dibasic acid, and catalyst to the reaction kettle, and react at 150°C to prepare intermediate 1. The mixing ratio of the organic alcohol, dibasic acid, and catalyst is 1.4:1:0.05. The organic alcohol is obtained by mixing lauryl alcohol and sorbitol in a mass ratio of 1:2; the dibasic acid is adipic acid; the catalyst is butyltin oxide;

[0092] (2) Prepare a surfactant solution, then add sodium silicate sol into the surfactant solution, stir at high speed to obtain a composite solution, and the surfactant solution is dioctyl sulfosuccinate sodium solution;

[0093] Wherein, the mass fraction of dioctyl sodium sulfosuccinate solution is 2%. The mixing volume ratio of sodium silicate sol to surfactant solution is 1:1; the molar ratio of sodium silicate to sodium succinate sulfonate is 1:1.

[0094] (3) Add graphene to the com...

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Abstract

The invention discloses a preparation method of a low-hydrophilicity polyurethane film. The preparation method comprises the following steps: (1) preparing an intermediate 1; (2) obtaining a compositesolution; (3) obtaining composite particles; (4) obtaining a dimethyl formamide group reaction mucus; (5) coating the dimethyl formamide reaction mucus on a flat plate, and then drying to constant weight to obtain a polyurethane film. The invention provides the preparation method of the low-hydrophilicity polyurethane film. The water contact angle of the polyurethane film treated by the method disclosed by the invention is reduced to a certain extent; therefore, the water repellency of the polyurethane film is greatly improved; compared with the prior art, the prepared polyurethane film has the advantages that a certain hydrophobic effect is shown, the relatively strong hydrophilicity is reduced, and meanwhile, the breaking property and the tensile property can be improved to a certain extent, so that the mechanical property of the prepared polyurethane film is improved to a certain extent, and the application range of the prepared polyurethane film can be obviously expanded.

Description

technical field [0001] The invention belongs to the technical field of new materials, in particular to a method for preparing a polyurethane film with low hydrophilicity. Background technique [0002] Polyurethane is a block polymer composed of alternating soft and hard segments. The soft segment is in a highly elastic state at room temperature and can produce large tensile deformation, while the hard segment provides nodes for the elongation and deformation of the soft segment. The unique chemical structure of polyurethane makes it have high elasticity, high strength, wear resistance, heat resistance, chemical resistance and other characteristics, so it is widely used in many fields. [0003] Polyurethane film has many excellent properties, but the polyurethane film prepared by the prior art has high hydrophilicity. High hydrophilicity will easily reduce the service life of the polyurethane membrane. Contents of the invention [0004] The purpose of the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32C08K3/04C08K9/02C08J5/18C08L75/06
CPCC08G18/3206C08G18/4236C08G18/664C08J5/18C08J2375/06C08K3/042C08K9/02
Inventor 郭平
Owner 含山县领创新材料科技有限公司
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