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Scratch-resistant polyurethane film and preparation method thereof

A polyurethane film and anti-scratch technology, applied in the field of anti-scratch polyurethane film and its preparation, can solve the problems of easy scratch, non-wear resistance, weakened protection performance, etc., achieve increased crosslinking degree, wide application range, Effects of improving scratch resistance and water and oil repellency

Active Publication Date: 2015-06-10
滁州云林数码影像耗材有限公司
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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 its texture is generally soft, easy to scratch, not resistant to wear and other shortcomings. In some applications, the above shortcomings will lead to poor appearance, weakened protection performance, and shortened service life. many problems

Method used

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  • Scratch-resistant polyurethane film and preparation method thereof
  • Scratch-resistant polyurethane film and preparation method thereof
  • Scratch-resistant polyurethane film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method for an anti-scratch polyurethane film, comprising the following steps:

[0035] 1) Synthesis of 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde;

[0036] Mix 3,3,3-trifluoropropanal and NaOH solution with a concentration of 2mol / L, the mass ratio of 3,3,3-trifluoropropanal and NaOH solution is 1:5, and then react, the reaction temperature is 40°C, reaction time 2h, separation and purification to obtain 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde, the structural formula is:

[0037]

[0038] 2) Synthesis of dialdehyde containing fluorine silicon;

[0039] 3-Hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde was then combined with 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxane di Alcohol added to acetone, 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde and 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasilyl The molar ratio of oxanediol is 3:1, the mass ratio of acetone to 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxanediol is 5:1, Reaction, the reaction te...

Embodiment 2

[0048] A preparation method for an anti-scratch polyurethane film, comprising the following steps:

[0049] 1) Synthesis of 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde;

[0050] Mix 3,3,3-trifluoropropanal and NaOH solution with a concentration of 4mol / L, the mass ratio of 3,3,3-trifluoropropanal and NaOH solution is 1:7, react, and the reaction temperature is 50°C , the reaction time is 3h, separated and purified to obtain 3-hydroxyl-2,4-bis(trifluoromethyl)-butyraldehyde, the structural formula is:

[0051]

[0052] 2) Synthesis of dialdehyde containing fluorine silicon;

[0053] 3-Hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde was then combined with 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxane di Alcohol added to acetone, 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde and 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasilyl The molar ratio of oxanediol is 4:1, the mass ratio of acetone to 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxanediol is 10:1, Reaction, the reaction te...

Embodiment 3

[0062] A preparation method for an anti-scratch polyurethane film, comprising the following steps:

[0063] 1) Synthesis of 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde;

[0064] Mix 3,3,3-trifluoropropanal and NaOH solution with a concentration of 3mol / L, the mass ratio of 3,3,3-trifluoropropanal and NaOH solution is 1:6, react, and the reaction temperature is 45°C , the reaction time is 2.5h, separated and purified to obtain 3-hydroxyl-2,4-bis(trifluoromethyl)-butyraldehyde, the structural formula is:

[0065]

[0066] 2) Synthesis of dialdehyde containing fluorine silicon;

[0067] 3-Hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde was then combined with 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxane di Alcohol added to acetone, 3-hydroxy-2,4-bis(trifluoromethyl)-butyraldehyde and 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasilyl The oxanediol molar ratio is 3.5:1, and the mass ratio of the acetone to 1,1,3,3,5,5,7,7-octamethyl-1,7-tetrasiloxanediol is 8: 1. Reaction, the re...

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Abstract

The invention relates to a scratch-resistant polyurethane film and a preparation method thereof. The scratch-resistant polyurethane film is mainly prepared by carrying out surface modification on a polyurethane film, an adopted surface modifier for the polyurethane film is an aqueous solution of fluorinated silicone containing diol and a photoinitiator, and under appropriate conditions, aldehyde groups are reacted with groups which are not completely reacted on the surface of the polyurethane film, so that a fluorinated silicone containing chain is firmly fixed on the surface, thereby increasing the hardness of the surface of the polyurethane film, and reducing the surface tension of the film so as to reduce friction, in such a way, an effect of scratch resistance is achieved, and the expansion of the application scope of the polyurethane film is facilitated.

Description

technical field [0001] The invention relates to a polyurethane film and a preparation method thereof, in particular to an anti-scratch polyurethane film and a preparation method thereof. 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 medical and health care, special clothing, and industrial neighborhoods such as aircraft parts, safety bulletproof glass and so on. [0003] Polyurethane film has many excellent properties, but its texture is generally soft, easy to scratch, not resistant to wear and other shortcomings. In s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08J7/18
Inventor 葛允林张曙明耿有为
Owner 滁州云林数码影像耗材有限公司