Composition and method for encapsulating a solar cell which minimizes thermal discoloration
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United States of America Patent
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Sep 5, 1995
Grant Date -
N/A
app pub date -
Aug 3, 1992
filing date -
Aug 3, 1992
priority date (Note) -
Expired
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Abstract
A composition and method for encapsulating a solar cell which minimizes thermal discoloration, or browning, of the encapsulant. The composition includes an EVA encapsulant, a curing agent and one of two particularly well-suited hindered amine light stabilizers, either O,O-t-Amyl-O-(1,2,2,6,6-Pentamethyl-4-piperidinyl) mono-peroxycarbonate or Poly[(4-hydroxy-2,2,6,6-tetramethyl-1-piperidine-ethanol)-co-dimethyl succinate]. Alternatively, if the selected hindered amine light stabilizer is O,O-t-Amyl-O-(1,2,2,6,6-Pentamethyl-4-piperidinyl) mono-peroxycarbonate, the curing agent need not be included. The composition is applied to a solar cell then cured. The cured product withstands thermal exposure and resists thermal discoloration.
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