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US 12,692,378 B2Granted
Hot melt composition in the form of a film for use in photovoltaic modules
AssigneeH.B. Fuller Company
InventorsThomas F. Kauffman, Jayesh G. Bokria
Life of this patent
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Abstract
The invention features a hot melt composition in the form of a film including a blend of propylene based polymers and ethylene based polymers. The hot melt composition in the form of a film is useful as an encapsulant for photovoltaic modules.
Claims17
A hot melt composition in the form of a film comprising:
- from 20% by weight to 60% by weight of a propylene based copolymer having a comonomer content of from 9% by weight to 22% by weight, that is a non-single site catalyzed APAO having Brookfield Viscosity at 190° C. of no greater than 20,000 cP, and has a Tm by DSC of no more than 105° C. as tested by ASTM D3418,
- a. from 35% by weight to 65% by weight of an ethylene based polymer having a density of no more than 0.90 g/cm3, and
- b. from 2% by weight to 15% by weight of a functionalized polymer having a melt index as tested by ASTM D 1238 (190° C., 2.16 kg) of from 2 g/10 min to 100 g/10 min and comprising a functional group selected from the group consisting of epoxides, carboxylic anhydrides, and carboxylic acids, and
- c. a silane adhesion promoter.
1 more element
Dependencies are inferred from the claim text.