Photo-thermal curing insulation paste for photovoltaic BC assembly and preparation method thereof

By combining photothermal curing insulating adhesives with epoxy acrylate POSS and misaligned photoinitiators, the problems of curing speed, adhesion and aging resistance of photovoltaic BC module insulating adhesives have been solved, achieving high hardness and low yellowing, which is suitable for the production of photovoltaic BC modules.

CN121628546APending Publication Date: 2026-03-10HUBEI XINGRUI SILICON MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-24
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

Existing photovoltaic BC module insulating adhesives have shortcomings in terms of curing speed, adhesion, aging resistance and hardness. In particular, the adhesion of photocurable insulating adhesives is poor, and the addition of photo and thermal initiators can easily lead to yellowing of the material, making it difficult to meet the stringent requirements of BC modules.

Method used

A combined method of photocuring with acrylate groups and thermocuring with epoxy groups was adopted. The two systems were connected by epoxy acrylate POSS, and long-wave photoinitiator and short-wave ultraviolet agent were combined in a misaligned manner. Hindered amine light stabilizer was added to prepare photothermal curable insulating adhesive, which improves crosslinking density and aging resistance.

Benefits of technology

It achieves rapid curing, good adhesion, high hardness, and excellent aging resistance of the insulating adhesive, while maintaining good transparency and a low yellowing index, making it suitable for the production of photovoltaic BC modules.

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Abstract

The invention discloses a photo-thermal curing insulation paste for a photovoltaic BC assembly and a preparation method of the photo-thermal curing insulation paste. The invention discloses an anti-ultraviolet coating which comprises the following components in parts by weight: 10-25 parts of vinyl ester resin, 20-25 parts of isobornyl acrylate, 7.5-10 parts of epoxy acrylate POSS, 20-30 parts of epoxy resin, 20-30 parts of an anhydride curing agent, 1-2 parts of a photoinitiator, 0.5-1 part of a thermal initiator, 0.5-1 part of an antioxidant, 0.3-0.5 part of an anti-ultraviolet agent and 0.2-0.3 part of a light stabilizer. The photo-thermal curing insulation paste for the photovoltaic BC component has the characteristics of high curing speed, good adhesion, high hardness, high transparency and aging resistance, and is suitable for being used as the insulation paste for the photovoltaic BC component.
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