# US 4,394,482 A · Modified asphalt composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,394,482 A - Document ID: US4394482A - Status: Granted - Kind: A - Application number: 06/360,124 - Filed: 1982-03-22 - Granted: 1983-07-19 - Earliest claimed: 1980-07-14 - Assignees: Owens-Corning Fiberglas Corporation - Inventors: William E. Uffner - Web page: https://patentgrep.com/patent/US4394482A ## CPC - C08L 95/00: Compositions of bituminous materials, e.g. asphalt, tar, pitch - Y10T 428/2933: Coated or with bond, impregnation or core - Y10T 428/2938: Coating on discrete and individual rods, strands or filaments - Y10T 428/2964: Artificial fiber or filament - Y10T 428/31641: Next to natural rubber, gum, oil, rosin, wax, bituminous or tarry residue - Y10T 428/31815: Of bituminous or tarry residue - 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 A rubber-modified asphalt composition prepared by blending a terpene resin with the reaction product of (1) a polymerizable aromatic monomer, a rubbery polymer and a bituminous material such as asphalt. The modified asphalt composition of the invention can thus be used in the treatment of glass fibers as well as in road-paving applications, roofing applications and the like. ## Claims ### Claim 1 A chemically modified asphalt composition comprising (1) an asphalt which has been reacted with a polymerizable vinyl aromatic monomer and a rubbery polymer and (2) a terpene resin, said terpene resin being present in an amount sufficient to reduce the viscosity of said reacted asphalt. ### Claim 2 (depends on 1) A chemically-modified asphalt composition as defined in claim 1 wherein the rubber polymer is selected from the group consisting of homopolymers of a conjugated diene and copolymers formed of a conjugated diene and at least one ethylenic monomer copolymerizable therewith. ### Claim 3 (depends on 2) A chemically-modified asphalt composition as defined in claim 2 wherein the ethylenic monomer is selected from the group consisting of styrene, acrylonitrile, methacrylonitrile, acrylic acid, methacrylic acid, hydroxy-styrene, aminostyrene and mercaptostyrene. ### Claim 4 (depends on 1) A chemically-modified asphalt as defined in claim 1 wherein the asphalt to be reacted is an asphalt which has been prereacted with a modifying agent selected from the group consisting of steam and an oxygen-containing gas. ### Claim 5 (depends on 1) A chemically-modified asphalt as defined in claim 1 wherein the vinyl aromatic monomer is styrene. ### Claim 6 (depends on 1) A chemically-modified asphalt as defined in claim 1 wherein the terpene resin is a resin derived from .alpha.-pinene. ### Claim 7 (depends on 1) A chemically-modified asphalt as defined in claim 1 wherein the vinyl aromatic monomer used in the reaction is an amount within the range of 0.5 to 40% by weight based on the weight of the asphalt. ### Claim 8 (depends on 1) A chemically-modified asphalt as defined in claim 1 wherein the rubbery polymer is reacted in an amount ranging from 0.5 to 35% by weight based on the weight of the asphalt. ### Claim 9 (depends on 1) A chemically-modified asphalt as defined in claim 1 wherein the vinyl aromatic monomer has the formula: ##STR4## wherein R.sub.1 is an aromatic group containing 6 to 12 carbon atoms, R.sub.2 is hydrogen or lower alkyl and R.sub.3 is selected from the group consisting of H, -CH.sub.3, -CH.sub.2 OH, -CHO, ##STR5## wherein X is halogen, ##STR6## ### Claim 10 (depends on 1) A chemically-modified asphalt as defined in claim 1 wherein the reaction is carried out in the presence of a polyfunctional vinyl aromatic monomer. ### Claim 11 (depends on 10) A chemically-modified asphalt as defined in claim 10 wherein the polyfunctional monomer has the formula: ##STR7## wherein R.sub.4 is a divalent aromatic group containing 6 to 12 carbon atoms, R.sub.5 is H or a lower alkyl and R.sub.6 is selected from the group consisting of H, -CH.sub.3, -CH.sub.2 OH, -CHO, ##STR8## wherein X is halogen, ##STR9## ### Claim 12 (depends on 1) A chemically-modified asphalt as defined in claim 1 wherein the terpene resin is present in an amount sufficient to reduce the viscosity of the asphalt. ### Claim 13 (depends on 1) Glass fibers having a coating thereon, said coating comprising a chemically-modified asphalt as defined in claim 1. ### Claim 14 (depends on 13) Glass fibers as defined in claim 13 wherein the glass fibers are in the form of a bundle and the coating constituents an impregnant in the bundle. ### Claim 15 (depends on 1) In a glass fiber reinforced asphalt wherein as asphalt constitutes a continuous phase in which the glass fibers are distributed as reinforcement, the improvement comprising, as the continuous phase, a chemically-modified asphalt as defined in claim 1. ### Claim 16 (depends on 1) In a glass fiber reinforced asphalt wherein an asphalt constitutes a continuous phase in which glass fibers, having a coating thereon, are distributed through the continuous phase as reinforcement, the improvement comprising glass fibers which have been coated with a chemically-modified asphalt as defined in claim 1.