Method of covering roofs with rooftop curable heat seamable roof sheeting
First Claim
1. A method for covering a roof comprising the steps of:
- applying layers of rooftop curable sheet material prepared from an uncured heat seamable polymeric composition of matter to the roof being covered, wherein said composition of matter of each layer consists essentially of100 parts by weight of a curable semi-crystalline polymer having more than about 2 percent by weight crystallinity and selected from the group consisting of polyolefins prepared from monomers containing at least 2 carbon atoms, said polymer having an ethylene content of at least 60 percent by weight and having up to about 3.7 weight percent unsaturation;
from about 20 to 300 parts by weight of a filler selected from the group consisting of reinforcing and non-reinforcing materials and mixtures thereof, per 100 parts of said polymer;
from about 20 to 150 parts by weight of at least one processing material, per 100 parts of said polymer; and
from about 1.5 to 10 parts by weight of a sulfur cure package having at least one vulcanizing accelerator, said cure package capable of allowing said composition of matter to cure at temperatures of from about 50°
C. to about 69°
C.;
overlapping adjacent edges of said layers; and
seaming the overlapped areas under sufficient heat and pressure to provide a peel adhesion seam strength at 70°
C., when preheated 15 minutes prior to testing, of greater than 2.9 pounds/inch and a seam shear strength at 70°
C., when preheated 15 minutes prior to testing, of greater than 27.5 pounds/square inch, said composition of matter being curable at temperatures of from about 50°
C. to about 69°
C.
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Accused Products
Abstract
A rooftop curable heat seamable sheet material for roofing prepared from an uncured polymeric composition of matter comprises 100 parts by weight of a semi-crystalline polymer having more than about 2 percent by weight crystallinity and selected from the group consisting of polyolefins prepared from monomers containing at least 2 carbon atoms from about 20 to 300 parts by weight of a filler selected from the group consisting of reinforcing and non-reinforcing materials and mixtures thereof per 100 parts of polymer; from about 20 to 150 parts by weight of a processing material and mixtures thereof, per 100 parts of polymer; and from about 1.5 to 10 parts by weight of a cure package capable of allowing the composition of matter to cure at temperatures of at least about 50° C. A method for covering a roof is also provided and comprises the steps of applying layers of rooftop curable sheet material prepared from an uncured heat seamable polymeric composition of matter to the roof being covered; overlapping adjacent edges of the layers; and seaming the overlapping areas under sufficient heat and some pressure to provide acceptable seam strength, the composition of matter being curable at temperatures of at least about 50° C., a temperature readily encountered on the roof of a building.
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Citations
10 Claims
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1. A method for covering a roof comprising the steps of:
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applying layers of rooftop curable sheet material prepared from an uncured heat seamable polymeric composition of matter to the roof being covered, wherein said composition of matter of each layer consists essentially of 100 parts by weight of a curable semi-crystalline polymer having more than about 2 percent by weight crystallinity and selected from the group consisting of polyolefins prepared from monomers containing at least 2 carbon atoms, said polymer having an ethylene content of at least 60 percent by weight and having up to about 3.7 weight percent unsaturation; from about 20 to 300 parts by weight of a filler selected from the group consisting of reinforcing and non-reinforcing materials and mixtures thereof, per 100 parts of said polymer; from about 20 to 150 parts by weight of at least one processing material, per 100 parts of said polymer; and from about 1.5 to 10 parts by weight of a sulfur cure package having at least one vulcanizing accelerator, said cure package capable of allowing said composition of matter to cure at temperatures of from about 50°
C. to about 69°
C.;
overlapping adjacent edges of said layers; andseaming the overlapped areas under sufficient heat and pressure to provide a peel adhesion seam strength at 70°
C., when preheated 15 minutes prior to testing, of greater than 2.9 pounds/inch and a seam shear strength at 70°
C., when preheated 15 minutes prior to testing, of greater than 27.5 pounds/square inch, said composition of matter being curable at temperatures of from about 50°
C. to about 69°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for covering a roof comprising the steps of:
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applying layers of rooftop curable sheet material prepared from an uncured heat seamable polymeric composition of matter to the roof being covered, wherein said composition of matter of each layer consists essentially of 100 parts by weight of a curable semi-crystalline polymer having more than about 2 percent by weight crystallinity and selected from the group consisting of polyolefins prepared from monomers containing at least 2 carbon atoms, said polymer having an ethylene content of at least 60 percent by weight; from about 20 to 300 parts by weight of a filler selected from the group consisting of reinforcing and non-reinforcing materials and mixtures thereof, per 100 parts of said polymer; from about 20 to 150 parts by weight of at least one processing material, per 100 parts of said polymer; and from about 1.5 to 10 parts by weight of a sulfur cure package having at least one vulcanizing accelerator, said cure package capable of allowing said composition of matter to cure at temperatures of from about 50°
C. to 69°
C.;overlapping adjacent edges of said layers; and seaming the overlapped areas under sufficient heat and pressure to provide acceptable seam strength, said composition of matter being curable at temperatures of from about 50°
C. to 69°
C.
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Specification