Color migration prevention polyurethane composite film as well as preparation method and application thereof

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By using composite films composed of crystalline modified polyurethane and waterborne polyurethane, the problem of color change of structural color films under external force is solved by utilizing physical cross-linking and hydrogen bond networks. This achieves anti-color migration and water-washing resistance, and improves mechanical properties and color stability.

CN121471692APending Publication Date: 2026-02-06FUJIAN ENJU NEW MATERIAL TECH CO LTD

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Patent Information

Application Number: CN202511898849.X
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2025-12-16
Publication Date: 2026-02-06

Application Information

Patent Timeline

16 Dec 2025

Application

CN202511898849.X

06 Feb 2026

Publication

CN121471692A

IPC: C08L75/08; C08K3/04; C08K3/36; C08J5/18; A43B1/14

CPC: C08J5/18; A43B1/14; C08J2375/08; C08J2475/08; C08K3/042; C08K3/36

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Application Domain

Footwear

Technology Topics

Polymer science Composite film

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AI Technical Summary

Technical Problem

Structural color films are prone to color changes or loss of functional properties under external forces, resulting in insufficient durability.

Method used

A composite film composed of crystalline modified polyurethane, waterborne polyurethane, vinyltriethoxysilane, graphene, fixing agent and pigments forms a stable structure through physical cross-linking and hydrogen bond network, which increases pigment adhesion and prevents pigment migration.

Benefits of technology

It improves the color migration resistance and water washability of polyurethane composite films, maintains color stability, and enhances mechanical properties.

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Abstract

The color migration prevention polyurethane composite film is prepared from the following raw materials in parts by weight: 40 to 50 parts of crystalline modified polyurethane, 30 to 40 parts of waterborne polyurethane, 10 to 15 parts of vinyltriethoxysilane, 5 to 8 parts of graphene, 5 to 8 parts of color fixing agent, 6 to 8 parts of toner and 1 to 3 parts of silicon dioxide. According to the color migration prevention polyurethane composite film and the preparation method thereof, the obtained polyurethane composite film has excellent color migration prevention and washing resistance effects.

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