ETHYLENE / α-OLEFIN COPOLYMER AND ADHESIVE-FORMING PREPARATIONS USED AS PACKAGING MATERIALS

VN127866APending Publication Date: 2026-08-17WANHUA CHEM GRP CO LTD
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Patent Information

Application Number
VN1202600893
Authority / Receiving Office
VN · VN
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-12-04
Filing Date
2023-12-20
Publication Date
2026-08-17

AI Technical Summary

Technical Problem

In the application of ethylene/α-olefin copolymers in the field of photovoltaic packaging, there are problems such as long mixing time of additives and insufficient crosslinking, which affects their processing efficiency and performance.

Method used

An ethylene/α-olefin copolymer with specific properties is provided, prepared by solution polymerization, with a wide melting range, low dH (100) and a suitable density and molecular weight distribution, allowing easier absorption of additives and increased crosslinking.

Benefits of technology

This copolymer can shorten the additive mixing time in photovoltaic adhesive film processing, improve crosslinking, enhance mechanical strength and heat resistance, meet the application needs of photovoltaic packaging, and have good industrial prospects.

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Abstract

This invention relates to the field of olefin polymerization engineering, and specifically to an ethylene / α-olefin copolymer and an adhesive film preparation for use as a packaging material. The ethylene / α-olefin copolymer of the invention has the following characteristics: (a) the peak melting temperature determined by differential scanning calorimetry (DSC) is between 30 and 90℃, and the width of the melting range determined by DSC is between 75 and 90℃; and (b) dH(90) and dH(100) were determined continuously by DSC and the nuclear fusion / annealing method (SSA), where 0 ≤ dH(90) ≤ 2J / g, and dH(100) = 0. The ethylene / α-olefin copolymer of the invention has distinct properties, and when this polymer is used in the adhesive film processing, the high degree of crosslinking is maintained while the mixing time of the polymer and the auxiliary is shortened.
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