Poly(Phenylene Ether) Composition for Silicone Sealant Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing poly(phenylene ether) compositions used in photovoltaic junction boxes exhibit inadequate adhesion to potting silicone sealants, which compromises the durability and weather resistance of these components.
Innovation Solution
A composition comprising 61-89 weight percent poly(phenylene ether), 3-10 weight percent polystyrene-poly(ethylene-butylene)-polystyrene triblock copolymer, 6-12 weight percent organophosphate ester flame retardant, and 2-17 weight percent adhesion promoter, such as phenolic compounds or hydroxysilyl-terminated polydiorganosiloxanes, is used to enhance adhesion between the poly(phenylene ether) and the potting silicone sealant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If known poly(phenylene ether) compositions are used, then the desired property balance of moldability, flame retardancy, heat resistance, and ductility is achieved, but adhesion to potting silicone sealant is inadequate
Solution Approach 1:
The patent applies composite materials by combining poly(phenylene ether) with specific adhesion promoters (silane-modified polymers, coupling agents, or surface treatment agents) to create a composite composition that maintains the base polymer's desirable properties (moldability, flame retardancy, heat resistance, ductility) while adding improved adhesion to potting silicone sealant through the functional additives
Solution Approach 2:
The patent applies parameter changes by modifying the chemical composition parameters of the poly(phenylene ether) material through the addition of adhesion promoters and surface treatment agents, changing the surface chemistry and molecular structure to enhance bonding capability with silicone sealant without compromising the bulk material's protective properties
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed composition significantly improves the adhesion between the poly(phenylene ether) and the potting silicone sealant, ensuring better durability and weather resistance of photovoltaic junction boxes by maintaining a strong bond even after curing, thus enhancing their performance in outdoor environments.
Implementation Method 1
2 to 17 weight percent of an adhesion promoter selected from the group consisting of (a) phenolic compounds having a molecular weight of 94 to 18,000 daltons; (b) hydroxysilyl-terminated polydiorganosiloxanes
Data Source
AI summary
A composition includes specific amounts of a poly(phenylene ether), a polystyrene-poly(ethylene-butylene)-polystyrene triblock copolymer, an organophosphate ester, and compound that improves adhesion to potting silicone sealant. The adhesion promoter can be a phenolic compound, a hydroxysilyl-terminated polydiorganosiloxane, or a combination thereof. The composition is particularly useful for molding parts of photovoltaic junction boxes that utilize potting silicone sealant as an internal electrical insulator.