Invista North America S.a.r.l.

Dystar Textilfarben Gmbh & Co. Deutschland Kg

Robert Dewhurst

Werner H Russ

Nathan E Houser

Gordon W Selling

Elizabeth Todd Singewald

Mike Elliott

Beverly Jean Selle

Steven Peter Pardini

Charles Richard Langrick

David John Marfell

Commercial spandex can be prepared with greater efficiency, improved consistency and at lower costs from a high-solids content polyurethaneurea polymer solution. The polyurethaneurea is prepared using a combination of 4,4'-MDI and 2,4&#x2032;-MDI, and an amount of chain extenders and chain terminators such that the polymer solution, prior to spinning, is highly soluble and has an appropriate pre-spun IV and primary amine content. Such spandex fibers, and the fabrics and garments comprising them, have good dyeability and colorfastness, as well as other desirable characteristics.

Dyeable spandex

A process for dyeing synthetic polyamide fibers, in particular in form of micro fibers, is described comprising the use of polyamide fibers having an amino end group content of at least 60 gram equivalents per 1000 kilograms of polyamide polymer and using a dye composition of water-soluble dyes containing at least one dye having 1 or 2 vinylsulfonyl groups and at least 1 dye having 1 or 2 groups of the general formula (A)

Process for dyeing synthetic polyamide fiber materials

Growing community of inventors

Gloucester, United Kingdom

Robert Dewhurst