Binary compound plasticizing gradient structure PVB (polyvinyl butyral) intermediate film, preparation method of binary compound plasticizing gradient structure PVB intermediate film and laminated glass

By designing a three-layer gradient structure PVB interlayer with a binary compound plasticizer, the problem of performance in existing technologies that are difficult to balance is solved, achieving high weather resistance, excellent sound insulation and strong adhesion, which is suitable for laminated glass.

CN122078014APending Publication Date: 2026-05-26YINIAN OPTICAL MATERIALS MANUFACTURING (BAODING) CO LTD
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Patent Information

Application Number
CN202610229676.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-26
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The existing plasticizing system of PVB interlayer film is difficult to adapt to the different performance requirements of each layer of the gradient structure interlayer film, which makes it impossible to simultaneously achieve high stability, high sound insulation and long-term aging resistance. In addition, the traditional preparation process leads to uneven dispersion of plasticizer, which affects the consistency and stability of performance.

Method used

A three-layer gradient PVB interlayer was designed using a binary compound plasticizer system. The first and second surface layers are compounded with diethylene glycol dibenzoate and 3GO, while the middle sound insulation layer is compounded with a mixture of diethylene glycol dibenzoate and 3GH. A specific preparation method was used to ensure uniform dispersion and interlayer fusion of each component.

Benefits of technology

It significantly improves the long-term weather resistance, sound insulation performance and bonding strength of laminated glass, reduces the tendency of plasticizer migration, ensures the consistency and stability of product performance, and is suitable for industrial production.

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Abstract

The invention relates to the technical field of laminated glass intermediate films, in particular to a binary compound plasticizing gradient structure PVB (polyvinyl butyral) intermediate film, a preparation method of the binary compound plasticizing gradient structure PVB intermediate film and laminated glass. The middle film is of a three-layer gradient structure and sequentially comprises a first surface layer, a middle sound insulation layer and a second surface layer from outside to inside. The first surface layer and the second surface layer both comprise first PVB resin and a first compound plasticizer, and the first compound plasticizer comprises diethylene glycol dibenzoate and 3GO; the middle sound insulation layer comprises second PVB resin and a second compound plasticizer, and the second compound plasticizer comprises a diol dibenzoate mixture and 3GH. Through an innovative material formula and structural design, a PVB intermediate film solution capable of giving consideration to high weather resistance, excellent sound insulation, firm binding power, low plasticizer migration tendency and an additional heat insulation function is provided, a stable and efficient preparation method is matched, and the limitation that in the prior art, the performance is difficult to synergistically improve is effectively overcome.
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