Mineral surfaced asphalt-based roofing products with encapsulated healing agents and methods of producing the same

摘要

An asphalt-based sheet roofing material includes capsules on its upper surface. When struck, as by hailstones, the capsules break to release a film forming fluid that spreads over the surface to heal the damage created by the hailstones.

主权项

1. A process for preparing a bituminous asphalt-based sheet roofing material, the process comprising:
(a) providing a base sheet comprising an upper layer of a bituminous composition; (b) depositing a plurality of roofing granules on at least a portion of the upper surface of the base sheet; (c) preparing capsules comprising a capsule wall and a liquid film-forming material to help repair damage to shingles or roofing membranes with the capsule wall having a compressive strength of from about 100 psi to 30,000 psi; and (d) depositing a plurality of the capsules on at least a portion of the upper surface of the base sheet.