# US 4,399,091 A · Comfort additive for acrylic fibers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,399,091 A - Document ID: US4399091A - Status: Granted - Kind: A - Application number: 06/360,456 - Filed: 1982-03-22 - Granted: 1983-08-16 - Earliest claimed: 1982-03-22 - Assignees: BASF Wyandotte Corporation - Inventors: Stephen E. Eisenstein; Edward M. Dexheimer - Web page: https://patentgrep.com/patent/US4399091A ## CPC - D01F 6/54: of polymers of unsaturated nitriles - C08L 33/20: Homopolymers or copolymers of acrylonitrile (C08L55/02 takes precedence) - D01F 1/10: Other agents for modifying properties - D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract A process for improving the comfort of garments made from acrylonitrile polymer filaments by incorporating in the filaments, a polymer obtained by cross-linking a polyether with an isocyanate. ## Claims ### Claim 1 In the process of producing filaments by spinning a solution comprising a solvent and a filament forming acrylonitrile polymer, the improvement comprising adding to said solution a polymer obtained by cross-linking a polyether with an isocyanate. ### Claim 2 (depends on 1) The process of claim 1 wherein the percent of said isocyanate cross-linked polyether in said solution is about 0.5 to 10 and the percent of said solvent is about 10 to 50 all by weight of the total mixture. ### Claim 3 (depends on 2) The process of claim 2 wherein said polyether is selected from the group consisting of those which correspond to the formulae: Y[(C.sub.3 H.sub.6 O).sub.n (C.sub.2 H.sub.4 O).sub.m H].sub.x and Y[(C.sub.2 H.sub.4 O).sub.m (C.sub.3 H.sub.6 O).sub.n H].sub.x wherein Y is the residue of an organic compound having from about 1 to 6 carbon atoms and containing x reactive hydrogen atoms in which x has a value of at least 1, n and m have a value such that the oxyethylene content of the molecule is from about 20 to 100 weight percent and the total molecular weight is from about 1,000 to 14,000. ### Claim 4 (depends on 3) The process of claim 3 wherein said isocyanate and polyether are reacted in an NCO:OH ratio of from about 1:10 to 10:1. ### Claim 5 (depends on 4) The process of claim 4 wherein said isocyanate is methylene diphenyl diisocyanate. ### Claim 6 (depends on 4) The process of claim 4 wherein said isocyanate is selected from the group consisting of 2,4-toluene diisocyanate, 2,6-toluene diisocyanate and mixtures thereof. ### Claim 7 (depends on 4) The process of claim 4 wherein said solvent is selected from the group consisting of dimethylformamide, dimethylacetamide, dimethylsulfoxide and N-methylpyrrollidinone. ### Claim 8 (depends on 7) The process of claim 7 wherein said solvent is dimethylformamide. ### Claim 9 A process for improving the "comfort" of garments made from acrylonitrile polylmer filaments comprising incorporating in said filaments, a polymer obtained by cross-linking a polyether with an isocyanate. ### Claim 10 (depends on 9) The process of claim 9 wherein the percent of said isocyanate cross-linked polyether in said filament is about 0.5 to 10 percent of the total weight of the filament. ### Claim 11 (depends on 10) The process of claim 10 wherein said polyether is selected from the group consisting of those which correspond to the formulae Y[(C.sub.3 H.sub.6 O).sub.n (C.sub.2 H.sub.4 O).sub.m H].sub.x and Y[C.sub.2 H.sub.4 O).sub.m (C.sub.3 H.sub.6 O).sub.n H].sub.x wherein Y is the residue of an organic compound having from about 1 to 6 carbon atoms and containing x reactive hydrogen atoms in which x has a value of at least 1, n and m have a value such that the oxyethylene content of the molecule is from about 20 to 100 weight percent and the total molecular weight is from about 1,000 to 14,000. ### Claim 12 (depends on 11) The process of claim 11 wherein said isocyanate and polyether are reacted in an NCO:OH ratio of from about 1:10 to 10:1 . ### Claim 13 (depends on 12) The process of claim 12 wherein said isocyanate is methylene diphenyl diisocyanate. ### Claim 14 (depends on 12) The process of claim 12 wherein said isocyanate is selected from the group consisting of 2,4-toluene diisocyanate, 2,6-toluene diisocyanate and mixtures thereof. ### Claim 15 A filament of acrylonitrile polymer characterized by improved "comfort" of garments made therefrom containing as an additive a polymer obtained by crosslinking a polyether with an isocyanate. ### Claim 16 (depends on 15) The filament of claim 15 wherein the percent of said isocyanate cross-linked polyether in said filament is about 0.5 to 10 percent of the total weight of the filament. ### Claim 17 (depends on 16) The filament of claim 16 wherein said polyether is selected from the group consisting of those which correspond to the formulae Y[(C.sub.3 H.sub.6 O).sub.n (C.sub.2 H.sub.4 O).sub.m H].sub.x and Y[(C.sub.2 H.sub.4 O).sub.m (C.sub.3 H.sub.6 O).sub.n H].sub.x wherein Y is the residue of an organic compound having from about 1 to 6 carbon atoms and containing x reactive hydrogen atoms in which x has a value of at least 1, n and m have a value such that the oxyethylene content of the molecule is from about 20 to 100 weight percent and the total molecular weight of the polyoxypropylene groups is from about 1,000 to 14,000. ### Claim 18 (depends on 17) The filament of claim 17 wherein said isocyanate and polyether are reacted in an NCO:OH ratio of from about 1:10 to 10:1. ### Claim 19 (depends on 18) The filament of claim 18 wherein said isocyanate is methylene diphenyl diisocyanate. ### Claim 20 (depends on 18) The filament of claim 18 wherein said isocyanate is selected from the group consisting of 2,4-toluene diisocyanate, 2,6-toluene diisocyanate and mixtures thereof.