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US 8,076,002 B2Granted
Laminates comprising thermoplastic polysiloxane-urea copolymers
AssigneeWacker Chemie AG
InventorsChristian Ochs, Ralph Hiemeyer, Oliver Schaefer
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Abstract
Photovoltaic modules are prepared by laminating an active device to a glass cover plate by means of a thermoplastic siloxane copolymer. The siloxane copolymer provides good adhesion, freedom from water absorption, and yet can be reworked either in the field or during recycling of the solar cell components.
Claims12
A laminate comprising
- (A) at least one layer containing inorganic and/or organic glass,
- (B) at least one layer containing a thermoplastic siloxane copolymer,
- (C) at least one photosensitive semiconductor layer, and
- (D) optionally, one or more further layers of organic polymers, organosilicon polymers, metallic materials, mineral materials or wood,
- wherein the thermoplastic siloxane copolymer of layer (B) comprises compounds of the formulae
- in which
- R are identical or different and are monovalent, Si-bonded hydrocarbon radicals optionally substituted by halogen atoms and optionally interrupted by non-adjacent oxygen atoms
- X are identical or different and are alkylene radicals having 1 to 20 carbon atoms, in which non-adjacent methylene units may be replaced by —O— groups,
- A are identical or different and are oxygen or an amino group —NR′—,
- Z are identical or different and are oxygen or an amino group —NR′—,
- R′ are identical or different and are hydrogen or an alkyl radical having 1 to 10 carbon atoms,
- Y are identical or different and are divalent hydrocarbon radicals which have 1 to 20 carbon atoms, optionally substituted by halogen atoms and optionally interrupted by non-adjacent oxygen atoms,
- D are identical or different and are divalent hydrocarbon radicals optionally substituted by halogen atoms or C1-C6-alkyl ester groups and in which non-neighboring methylene units are optionally replaced by —O—, —COO—, —OCO— or —OCOO— groups,
- n are identical or different and are numbers from 1 to 4000,
- a is a number of at least 1,
- b is 0 or a number from 1 to 1000, and
- c is 0 or a number from 1 to 1000.
14 more elements
Dependencies are inferred from the claim text.