Roofing membrane having decreased water absorption
AssigneeBmic LLC
InventorsYan Zheng, Yixi Xiao, Joshua Tingley
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Abstract
A roofing membrane includes a substrate and a cured polymer layer disposed on the substrate, where the cured polymer layer includes 0.01-40 wt. % hydrophobic additive, 15-60 wt. % silyl-terminated polymer, and 15-60 wt. % inorganic filler, where water absorption of the roofing membrane is less than 25% by weight after an exposure period of 7 days when tested according to ASTM D471. The hydrophobic additive may include one or more of a hydrophobic polyether, a hydrophobic silane, a fatty acid ester, an organic titanate compound, a siloxane polymer, and a silicone glycol copolymer.
Claims35
A roofing membrane comprising:
- a substrate;
- and
- a cured polymer layer disposed on the substrate, wherein the cured polymer layer comprises:
- 0.01-40 wt. % hydrophobic additive,
- wherein the hydrophobic additive comprises one or more compounds selected from the group consisting of a hydrophobic polyether, a hydrophobic silane, a fatty acid ester, an organic titanate compound, a siloxane polymer, and a silicone glycol copolymer;
- 15-60 wt. % silyl-terminated polymer;
- and
- 15-60 wt. % inorganic filler.
A cured polymer layer comprising:
- 0.01-40 wt. % hydrophobic additive,
- wherein the hydrophobic additive comprises one or more compounds selected from the group consisting of a hydrophobic polyether, a hydrophobic silane, a fatty acid ester, an organic titanate compound, a siloxane polymer, and a silicone glycol copolymer;
- 15-60 wt. % silyl-terminated polymer;
- and
- 15-60 wt. % inorganic filler,
- wherein water absorption of the cured polymer layer is less than 25% by weight after an exposure period of 7 days when tested according to ASTM D471.
Dependencies are inferred from the claim text.