Stock material or miscellaneous articles – Sheets or webs edge spliced or joined
Patent
1995-04-28
1996-12-10
Michl, Paul R.
Stock material or miscellaneous articles
Sheets or webs edge spliced or joined
428 58, 428 61, 428290, 524427, 524437, 524442, 524445, 524449, 524451, 156 71, 156157, 156159, 1563082, 1563084, B32B 302, C08K 310, E04D 500
Patent
active
055828906
ABSTRACT:
A heat seamable sheet material for roofing prepared from an uncured polymeric composition of matter which comprises 100 parts by weight of a semi-crystalline polymer 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 one or more non-black mineral fillers per 100 parts of the polymer; and from about 20 to 150 parts by weight of a processing material, per 100 parts of the polymer. The non-black mineral fillers may include hard clays, soft clays, calcined clays, chemically modified clays, mica, talc, alumina trihydrates, calcium carbonate, titanium dioxide, amorphous precipitated hydrated silica and mixtures thereof. The processing material may be any non-volatile oil, i.e., a paraffinic processing oil. Also provided is a method for covering a roof comprising the steps of applying layers of heat seamable sheet material, prepared from an uncured non-black mineral filled polymeric composition of matter, to the roof being covered; overlapping adjacent edges of the layers; and heating the overlapped areas to slightly above the softening point of the sheet material and seaming the overlapped areas under sufficient pressure to provide an acceptable seam strength, the composition of matter having sufficient self-adhesion without the use of an adhesive.
REFERENCES:
patent: 5162436 (1992-11-01), Davis et al.
patent: 5242970 (1993-09-01), Davis et al.
patent: 5370755 (1994-12-01), Davis et al.
Davis James A.
Valaitis Joseph K.
Asinovsky Olga
Bridgestone/Firestone Inc.
Michl Paul R.
Troy, Sr. Frank J.
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