Roofing systems utilizing a primer including a silicon-terminated polymer
A method of installing a roof system, the method comprising (i) providing a first membrane panel including a polymeric planar body having a top planar surface and a bottom planar surface; (ii) securing the first membrane panel to a roof substrate; (iii) providing a second membrane panel including a polymeric planar body having a top planar surface and a bottom planar surface; (iv) positioning the second membrane panel adjacent to the first membrane panel so that the second membrane panel overlaps the first membrane panel in a lap region; (v) applying a primer composition to the top planar surface of the first membrane panel in the lap region to form a first primed surface; (vi) optionally applying a primer composition to the bottom planar surface of the second membrane panel in the lap region to form a second primed surface; (vii) applying an adhesive to at least one of the first primed surface or the second primed surface; and (viii) seaming the first membrane panel to the second membrane panel with the adhesive, where the primer composition applied to the first membrane panel and the primer composition optionally applied to the second membrane panel includes a silyl-terminated polymer.
1 . A method of installing a roof system, the method comprising:
(i) securing a first membrane panel to a roof substrate, the first membrane panel including a first polymeric planar body having a top planar surface and a bottom planar surface;
(ii) positioning a second membrane panel adjacent to the first membrane panel so that the second membrane panel overlaps the first membrane panel in a lap region, the second membrane panel including a second polymeric planar body having a top planar surface and a bottom planar surface;
(iii) field applying, at a location of the roof system, a primer composition to at least one of the top planar surface of the first membrane panel and the bottom planar surface of the second membrane panel, in the lap region, to form a first primed surface, where the primer composition includes a silyl-terminated polymer, wherein the silyl-terminated polymer includes a polyurethane backbone, and wherein the field applying the primer composition forms a primer layer that has a thickness of from about 6 μm to about 178 μm;
(iv) applying an adhesive to the first primed surface; and
(v) seaming the first membrane panel to the second membrane panel with the adhesive.
2 . The method of claim 1 , where the primer composition is characterized by a Brookfield Viscosity (#2 spindle at 20 r.p.m.) of less than 1500 centipoise.
3 . The method of claim 1 , where the first membrane panel and the second membrane panel are cured rubber membranes.
4 . The method of claim 1 , where the primer composition further includes a moisture scavenger.
5 . A method of installing a roof system, the method comprising:
(i) securing a first membrane panel to a roof substrate, the first membrane panel including a polymeric planar body having a top planar surface and a bottom planar surface;
(ii) positioning a second membrane panel adjacent to the first membrane panel so that the second membrane panel overlaps the first membrane panel in a lap region, the second membrane panel including a polymeric planar body having a top planar surface and a bottom planar surface, where a primer layer is present in the lap region on at least one of the top planar surface of the first membrane and the bottom planar surface of the second membrane, where the primer layer has a thickness of from about 6 μm to about 178 μm;
(iii) applying an adhesive to the primer layer; and
(iv) seaming the first membrane panel to the second membrane panel with the adhesive, where the primer layer is pre-formed prior to delivery to the roof substrate by applying a primer composition including a silyl-terminated polymer, where the silyl-terminated polymer includes a polyurethane backbone.
6 . A method of installing a roof system, the method comprising:
(i) securing a first membrane panel to a roof substrate, the first membrane panel including a polymeric planar body having a top planar surface and a bottom planar surface, where the first membrane panel includes a primer layer on the top planar surface in a lap region of the first membrane panel and an adhesive layer disposed on the primer layer, where the primer layer has a thickness of from about 6 μm to about 178 μm;
(ii) positioning a second membrane panel adjacent to the first membrane panel so that the second membrane panel overlaps the first membrane panel in the lap region, the second membrane panel including a polymeric planar body having a top planar surface and a bottom planar surface; and
(iii) seaming the first membrane panel to the second membrane panel with the adhesive layer, where the primer layer is pre-formed on the top planar surface of the first membrane panel prior to delivery to the roof substrate by applying a primer composition including a silyl-terminated polymer, where the silyl-terminated polymer includes a polyurethane backbone, and where the adhesive layer is pre-applied to the primer layer of the first membrane panel prior to delivery to the roof substrate.
7 . The method of claim 1 , where the primer composition further includes an adhesion promoter.
8 . The method of claim 1 , where the primer composition further includes a catalyst.
9 . The method of claim 1 , where the primer composition further includes a tackifier resin.
10 . The method of claim 1 , where the primer composition further includes a moisture scavenger, an adhesion promoter, a catalyst, and a tackifier resin.
11 . The method of claim 1 , where the field applying the primer composition applies the primer composition to the top planar surface of the first membrane panel, further comprising field applying an additional amount of the primer composition to the bottom planar surface of the second membrane panel in the lap region to form a second primed surface, prior to the seaming.
12 . The method of claim 5 , where the primer layer is present on the top planar surface of the first membrane, and where a second primer layer is present in the lap region on the bottom planar surface of the second membrane, where the second primer layer is pre-formed prior to delivery to the roof substrate by applying an additional amount of the primer composition including the silyl-terminated polymer.
13 . The method of claim 6 , where a second primer layer is present in the lap region on the bottom planar surface of the second membrane panel, where the second primer layer is pre-formed on the bottom planar surface of the second membrane panel prior to delivery to the roof substrate by applying an additional amount of the primer composition including the silyl-terminated polymer.