Roofing membrane comprising microspheres
AssigneeIcopal A/S
InventorJan Damgaard
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Abstract
A foam suitable for use in roofing systems is provided. Roofing membranes comprising the foam have superior flowing properties at high temperatures without sacrificing low temperature performance. A particular useful roofing membrane comprises an upper surface layer, a reinforcement layer, and optionally a lower self-adhesive layer, wherein expanded microspheres are provided in one or more of said layers in an amount of between 0.01 and 10% based on the total weight of the roofing membrane. Moreover a method of making roofing membranes is provided.
Claims10
a roofing membrane comprising:
- an upper surface layer
- a reinforcement layer, and
- optionally a lower self-adhesive layer,
- wherein expanded microspheres are provided in one or more of said layers in an amount of between 0.01 and 10% based on the total weight of the roofing membrane.
Use of microspheres in the preparation of bitumen for extending the temperature interval in which the bitumen remains flow resistant.
Method for preparing a microsphere-containing bitumen comprising the steps of heating and melting a bitumen product, adding expanded microspheres and cooling the bitumen so as to obtain a foamed bitumen product.
Method for preparing a microsphere-containing bitumen comprising the steps of adding expandable microspheres to a bitumen product, heating until at least a part of the expandable microspheres expand, and cooling the bitumen so as to obtain a foamed bitumen product.
Dependencies are inferred from the claim text.