Heat seamable flame retardant roof sheeting with highly crystalline thermoplasticity promoters and method for covering roofs
First Claim
1. A heat seamable flame retardant sheet for roofing prepared from an uncured polymeric composition of matter consisting essentially of:
- 100 parts by weight of a polymer blend consisting essentially offrom about 50 to 90 parts by weight of a halogenated olefinic elastomer selected from the group consisting of halogenated polyolefins having up to about 2 percent by weight crystallinity, said polyolefins being prepared from monomers having at least 2 carbon atoms and mixtures thereof; and
from about 10 to 50 parts by weight of a highly crystalline thermoplasticity promoter selected from the group consisting of polyolefin polymers prepared from monomers containing at least two carbon atoms;
from about 50 to 250 parts by weight of a filler selected from the groupconsisting of reinforcing and non-reinforcing materials and mixtures thereof, per 100 parts of said polymer blend;
from about 20 to 105 parts by weight of a processing material and mixtures thereof, per 100 parts of said polymer blend; and
from about 15 to 90 parts by weight of an additive selected from the group consisting of flame retardant materials and mixtures thereof, per 100 parts of said polymer blend.
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Accused Products
Abstract
A heat seamable flame retardant sheet material for roofing prepared from an uncured polymeric composition of matter which comprises 100 parts by weight of a polymer blend comprising from about 50 to 90 parts by weight of halogenated polyolefins having up to about 2 percent by weight crystallinity, which polyolefins are prepared from monomers having at least 2 carbon atoms, and mixtures thereof and from about 10 to 50 parts by weight of a highly crystalline thermoplasticity promoter selected from the group consisting of polymeric olefins prepared from monomers consisting of at least two carbon atoms; from about 50 to 250 parts by weight of a filler selected from the group consisting of reinforcing and non-reinforcing materials and mixtures thereof per 100 parts of the polymer blend; from about 20 to 105 parts by weight of a processing material and mixtures thereof, per 100 parts of the polymer blend; and from about 15 to 90 parts by weight of an additive selected from the group consisting of flame retardant materials and mixtures thereof, per 100 parts of the polymer blend. A method for covering a roof comprises the steps of applying layers of sheet material as described above to the roof being covered; overlapping adjacent edges of the layers; heating the overlapped areas to slightly above the softening point of the sheet material and seaming the overlapped areas using heat and sufficient pressure to provide an acceptable seam, the composition of matter having sufficient self-adhesion without the use of an adhesive.
82 Citations
7 Claims
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1. A heat seamable flame retardant sheet for roofing prepared from an uncured polymeric composition of matter consisting essentially of:
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100 parts by weight of a polymer blend consisting essentially of from about 50 to 90 parts by weight of a halogenated olefinic elastomer selected from the group consisting of halogenated polyolefins having up to about 2 percent by weight crystallinity, said polyolefins being prepared from monomers having at least 2 carbon atoms and mixtures thereof; and from about 10 to 50 parts by weight of a highly crystalline thermoplasticity promoter selected from the group consisting of polyolefin polymers prepared from monomers containing at least two carbon atoms; from about 50 to 250 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 blend; from about 20 to 105 parts by weight of a processing material and mixtures thereof, per 100 parts of said polymer blend; and from about 15 to 90 parts by weight of an additive selected from the group consisting of flame retardant materials and mixtures thereof, per 100 parts of said polymer blend. - View Dependent Claims (2, 3, 4)
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5. A method for covering a roof with a heat seamable flame retardant sheet material for roofing prepared from an uncured polymeric composition of matter comprising the steps of:
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applying layers of self-adhering sheet material prepared from an uncured heat seamable flame retardant polymeric composition of matter consisting essentially of 100 parts by weight of a polymer blend consisting essentially of from about 50 to 90 parts by weight of a halogenated olefinic elastomer selected from the group consisting of halogenated polyolefins having up to about 2 percent by weight crystallinity, said polyolefins being prepared from monomers having at least 2 carbon atoms and mixtures thereof; and from about 10 to 50 parts by weight of a highly crystalline thermoplasticity promoter selected from the group consisting of polyolefin polymers prepared from monomers containing at least two carbon atoms; from about 50 to 250 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 blend; from about 20 to 105 parts by weight of a processing material and mixtures thereof, per 100 parts by weight of said polymer blend; and from about 15 to 90 parts by weight of an additive selected from the group consisting of flame retardant materials and mixtures thereof, per 100 parts of said polymer blend, to the roof being covered;
overlapping adjacent edges of said layers;heating the overlapped areas to slightly above the softening point of the sheet material and seaming the overlapped areas using heat and under sufficient pressure to provide an acceptable seam strength, said composition of matter having sufficient self-adhesion without the use of an adhesive. - View Dependent Claims (6, 7)
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Specification