# US 5,700,538 A · Mineral filled EPDM membrane compositions with improved adhesion performance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,700,538 A - Document ID: US5700538A - Status: Granted - Kind: A - Application number: 08/708,892 - Filed: 1996-09-05 - Granted: 1997-12-23 - Earliest claimed: 1995-03-31 - Assignees: Bridgestone/Firestone, Inc. - Inventors: James A. Davis; Jeffrey W. Henegar; William F. Barham, Jr. - Web page: https://patentgrep.com/patent/US5700538A ## CPC - E04D 5/06: by making use of plastics - C08K 3/013: Fillers, pigments or reinforcing additives - C08K 3/06: Sulfur - C08K 3/346: {Clay} - C08K 5/0016: {Plasticisers} - C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers - C08L 91/00: Compositions of oils, fats or waxes; Compositions of derivatives thereof - C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure - C08L 2312/00: Crosslinking - C08L 2666/04: Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof - Y10T 428/19: Sheets or webs edge spliced or joined - E04D: ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS (coverings of outer walls by plaster or other porous material E04F13/00) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Vulcanizable elastomeric roof sheet materials for roofing having improved adhesion performance and prepared from a polymeric composition of matter comprising at least one polymer selected from the group consisting of polyolefins prepared from monomers containing at least two carbon atoms and mixtures thereof, the polymer having a crystallinity of up to about 2 percent by weight; about 20 to 125 parts by weight of one or more mineral fillers per 100 parts of the polymer, about 50 to 110 parts by weight of one or more black-type fillers per 100 parts of the polymer; and from about 50 to 70 parts by weight of a processing material per 100 parts of the polymer and having improved peel adhesion to itself using commercially available bonding and lap- splice adhesives. A method of covering a roof comprises the steps of applying layers of vulcanizable elastomeric roof sheet material prepared from a vulcanizable polymeric composition of matter, to the roof being covered; overlapping adjacent edges of the layers; and adhesively seaming the overlapped edges of the layers together to form an acceptable seam. The composition of matter is devoid of any flame retardant rubber chemical additives, heavy metals, oxidants and halogen-containing polymers. ## Claims ### Claim 1 A laminate seam of rubber sheet material for roofing having improved adhesion performance comprising: two layers of vulcanizable elastomeric roof sheet material, one of said layers at least partially overlapping the other of said layers, said roof sheet material being prepared from a polymeric composition of matter having up to about 2 weight percent crystallinity comprising: at least one polymer selected from the group consisting of polyolefins prepared from monomers containing at least 2 carbon atoms and mixtures thereof, said polymer having a crystallinity of up to about 2 percent by weight; about 20 to 125 parts by weight of one or more non-black mineral fillers per 100 parts of said polymer; about 50 to 110 parts by weight of one or more black-type fillers per 100 parts of said polymer; from about 50 to 70 parts by weight of a processing material, per 100 parts of said polymer, said composition of matter being devoid of flame retardant rubber chemical additives, heavy metals, oxidants and halogen-containing polymers; and a cure package; and an adhesive, selected from the group consisting of neoprene-based and butyl-based adhesives, interposed between the area of overlapping of said layers, said layers of roof sheet material having improved peel adhesion to each other using said adhesive. ### Claim 2 (depends on 1) A laminate seam, as set forth in claim 1, wherein said non-black mineral filler is selected from the group consisting of hard clays, soft clays, chemically modified clays, mica, talc, calcium carbonate, titanium dioxide, amorphous precipitated hydrated silica and mixtures thereof. ### Claim 3 (depends on 2) A laminate seam, as set forth in claim 2, wherein said processing material is selected from the group consisting of paraffinic oils, naphthenic oils and waxes and mixtures thereof. ### Claim 4 (depends on 3) A laminate seam, as set forth in claim 3, wherein said mineral filler comprises about 65 parts by weight of a clay and said polymeric composition of matter includes about 60 parts by weight of processing oil. ### Claim 5 (depends on 2) A laimnate seam, as set forth in claim 2, wherein said clay is chemically modified. ### Claim 6 (depends on 2) A laminate seam, as set forth in claim 2, wherein said clay is untreated. ### Claim 7 (depends on 1) A laminate seam, as set forth in claim 1, wherein said polymer further comprises a diene monomer component. ### Claim 8 (depends on 7) A laminate seam, as set forth in claim 7, wherein said polymer comprises EPDM. ### Claim 9 (depends on 1) A laminate seam, as set forth in claim 1, further comprising from about 10 to 35 parts by weight of ground coal filler per 100 parts of said polymer. ### Claim 10 (depends on 1) A laminate seam, as set forth in claim 1, further comprising at least one or more polymers forming a mixture with said at least one polyolefinic polymer, wherein said one or more polymers forming said mixture are selected from the group consisting of polyolefins prepared from monomers containing at least 2 carbon atoms and have a crystallinity of at least about 2 percent by weight, and wherein said mixture is blended in relative proportions so that the overall crystallinity thereof does not exceed about 2 percent by weight. ### Claim 11 (depends on 1) A laminate seam, as set forth in claim 1, wherein said adhesive is selected from the group consisting of bonding adhesives and lap-splice adhesives. ### Claim 12 (depends on 11) A laminate seam, as set forth in claim 11, wherein said adhesive is a bonding adhesive and said layers of roof sheet material have a peel adhesion seam strength of at least 6.39 pounds/inch upon aging 7 days at 23.degree. C. using said bonding adhesive. ### Claim 13 (depends on 11) A laminate seam, as set forth in claim 11, wherein said adhesive is a lap-splice adhesive and said layers of roof sheet material have a peel adhesion seam strength of at least 6.03 pounds/inch upon aging 7 days at 70.degree. C. using said lap-splice adhesive. ### Claim 14 (depends on 1) A laminate seam, as set forth in claim 1, wherein said cure package includes sulfur and at least one sulfur cure accelerators.