PVB (Polyvinyl Butyral) adhesive film composition, adhesive film for laminated glass and PVB adhesive film assembly for laminated glass

CN120682735APending Publication Date: 2025-09-23HANGZHOU FIRST APPLIED MATERIAL CO LTD
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Patent Information

Application Number
CN202510946536.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-09
Publication Date
2025-09-23

AI Technical Summary

Technical Problem

Due to the high plasticizer content in existing PVB films, plasticizer precipitation is prone to occur, resulting in color unevenness and bubbles, affecting the stability and performance of use.

Method used

A PVB film composition is provided, comprising a PVB resin, 0.1 to 5 parts of a colorant, 0.1 to 5 parts of a colorant, 0.5 to 8 parts of a silane coupling agent, 0.1 to 1 parts of an accelerator, and a solvent. After the components in the PVB film composition are mixed, the mass fraction of the PVB resin is 10 wt% to 25 wt%, and the viscosity of the components in the PVB film composition after mixing is 800 to 80,000 cps.

Benefits of technology

It reduces the precipitation and migration of plasticizers, improves the cohesive strength of the film and the bonding strength with the substrate, ensures the color stability of the film and the stability of the overall performance, and is suitable for laminated glass interlayer.

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Abstract

The invention provides a PVB (Polyvinyl Butyral) adhesive film composition, an adhesive film for laminated glass and a PVB adhesive film assembly for laminated glass. The PVB adhesive film composition comprises the following components in parts by weight: 100 parts of PVB resin, 0-10 parts of a plasticizer, 0.1-5 parts of a coloring agent, 0.5-8 parts of a silane coupling agent, 0.1-1 part of an accelerant and a solvent, after the components in the PVB adhesive film composition are mixed, the mass fraction of the PVB resin is 10wt%-25wt%, and after the components in the PVB adhesive film composition are mixed, the viscosity is 800-80000cps. According to the PVB adhesive film composition disclosed by the invention, the introduction of a small-molecule plasticizer is reduced, so that the precipitation and migration of the plasticizer in the use process of the adhesive film are reduced, the corrosion damage of the plasticizer to a device in the use process is avoided, and the long-term use stability and reliability of the device are improved.
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