A waterproofing membrane composition comprising PVB, polymer modified bitumen, a compatibilizing agent selected from the group consisting of a succinate mixed ester of benzyl and of branched nonyl or decyl, a bis(ethoxylated alkyl) succinate, a composition comprising aliphatic polycarboxylic acid esters of formula R′—X—[O—C(O)—R]n, or a mixture thereof.

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 cross-linked nonwoven fibrous mat is disclosed comprising a core layer including a fibrous precursor mat bound with a formaldehyde-free core binder composition and a cross-linker disposed on at least one surface of the core layer, said cross-linker comprising one or more of isocyanate, polyol, and melamine functional groups. The cross-linked nonwoven mat has a hot-wet retention of at least 25%.

Some embodiments relate to asphalt shingle waste coatings in roofing shingles of roofing systems. A roofing system comprises a plurality of roofing shingles. The plurality of roofing shingles, when installed on a roof substrate, comprises exposed surfaces and unexposed surfaces. The plurality of roofing shingles comprises asphalt shingle waste coatings on or only on at least one of the unexposed surfaces. The plurality of roofing shingles comprises asphalt coatings on or only on at least one of the exposed surfaces.

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.

A porous composite substrate for producing bituminous membranes, comprising a first nonwoven and a second nonwoven layer which comprise polyester fibers, and an intermediate nonwoven layer comprising organic flame-resistant fibers. A combustion temperature of the organic flame-resistant fibers is at least 500° C. and/or a limiting oxygen index (LOI) of the organic flame-resistant fibers is at least 25%. The composite substrate is mechanically consolidated.

A mixture made from or containing T1) from 99 wt % to 75 wt % of bitumen, and T2) from 1 wt % to 25 wt % of a polymer composition made from or containing A) 5-35% by weight of a propylene homopolymer; B) 20-50% by weight of an ethylene homopolymer; and C) 30-60% by weight of a terpolymer of ethylene, propylene, and 1-butene.

A membrane roofing system that includes a waterproof layer that protects an insulation layer and a granule coupled to the waterproof layer. The granule has a 60% or greater reflectivity that reduces transmission of ultraviolet light to the waterproof layer. The granule is coated in a fluorinated acrylic copolymer that resists adsorption and absorption of asphaltic chemicals by the granule from the waterproof layer.

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 fiber mat includes a unitary assembly of fibers including at least a first set of fibers and at least a first binder comprising an organic resin, wherein the unitary assembly of fibers includes a minority portion and a majority portion different than the minority portion, wherein the fiber mat provides at least a 5% increase in tear when placed in a bituminous roofing product compared to an equivalent bituminous roofing product made with a fiber mat of equivalent weight containing a homogenous mat structure.