Provided is a nonwoven material as base interlining in sarking, roofing, or coated sealing membrane with an improved isotropy of the material. The nonwoven material comprises a spunbond nonwoven of polyester filaments. The nonwoven has a tensile strength ratio of the specific tensile strength MD to the specific tensile strength CD between 1 and 1.5. The nonwoven material for bituminous roofing membranes has a preferential thermal dimensional stability (TDS), as well as a preferential thermal shrinkage behaviour. Further, a method is provided to manufacture a nonwoven material with an improved mechanical homogeneity. In addition, a bituminous roofing product comprising a nonwoven material according to the invention is provided. The bituminous roofing product is preferably a bituminous roofing membrane.

Disclosed are methods and devices for forming a combined polyester and fiberglass mat, in which separate polyester and fiberglass layers can be formed or polyester filaments and fiberglass threads can be mixed together by a disperser to form a polyester and fiberglass web. The polyester filaments and the fiberglass threads can be dispersed by separate dispersers on a web forming belt to form separate layers of polyester filaments and fiberglass threads, or can be dispersed by a single disperser to at least, somewhat evenly disperse, the fiberglass threads and polyester filaments.

A process for in-line extrusion of polymeric coatings onto roofing shingles during manufacturing includes moving a web of shingle substrate material in a downstream direction and extruding a liquefied coating of polymeric material onto at least one surface of the moving web to form a thin film. The liquefied coating may be a molten polymeric material that forms a thin film on a back surface of the shingle material to prevent sticking and eliminate the need for a traditional back dusting with material such as powdered stone. The polymeric film further may be applied to the substrate material in lieu of a saturation coating of asphalt, thus reducing cost and weight while providing a comparable moisture barrier and a lighter more flexible shingle.

Phase stable compositions of styrenic block copolymers (SBC) and high asphaltene content asphalts and methods for their preparation are provided. In particular the styrenic block copolymer is a styrene-conjugated diene-styrene block copolymer such as styrene-butadiene-styrene (SBS) and phase stability is achieved through addition of low levels of sulfur based crosslinkers. The compositions find use in, for example, the manufacture of roofing membranes.

The invention relates to a novel binder system and its use for bonding textile fabrics as well as products containing such bonded textile fabrics. The materials according to the invention are suitable for manufacturing base interlinings which may be used for manufacturing base interlinings for sarking, roofing and sealing membranes, particularly for manufacturing coated sarking, roofing and sealing membranes.

A bituminous composition comprising at least one bitumen base, at least one compound of general formula (I): Ar1-R.sub.1Ar.sub.2 (I), and at least one compound of general formula (II): R.sub.2(NH).sub.nCONHX(NHCO).sub.p(NH).sub.nR.sub.2 (II). The invention also concerns a process for the preparation of said bituminous composition.

An asphalt composition suitable for use as a shingle roof coating is described. The asphalt composition comprises an oxidized asphalt feedstock and a first concentrate. The oxidized asphalt feedstock has a softening point greater than 205 F. and a penetration of less than 15 dmm. The first concentrate includes an elastomeric polymer and an asphalt flux. The asphalt composition includes 1.5% to 4.5% by weight of the elastomeric polymer.

A solar heat-reflective roofing product includes a base sheet, and solar heat-reflective roofing granules on top of the base sheet. The granules have a base particle with a flake-like geometry covered by a uniform coating layer. The coating layer has a thickness of at least one mil and includes a coating binder and at least one solar heat-reflective pigment. The solar heat-reflective pigment provides a solar heat reflectance of greater than 70 percent to the granules and the roofing product. Roofing products including roofing shingles and roofing membranes are described.

The invention provides a bright white refractory roofing granule, comprising a ceramic material formed from a substantially homogenous mixture of a ceramic-forming clay, sintering material, and optionally comprising silica particles, and other potential additives, said bright white refractory roofing granule having a total solar reflectance of at least 0.80 and a Hunter Color Lvalue of at least 85.0, together with processes for making and using the same.

Aqueous polymer dispersions and their use for producing shaped articles having improved heat resistance are described.