Use of aqueous dispersions of two-phase emulsion graft copolymers as binders for stiffening materials in the textile and leather industry

US5614049A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Klaus Kohlhammer · Marktl, DE
• Gerhard Koegler · Altötting, DE
• Monika Schwemmer · Unterneukirchen, DE

Key dates

• Filing date: Apr 17, 1996
• Grant date: Mar 25, 1997
• Expiry date: Apr 17, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T156/1043
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Process for the stiffening of textile or leather materials, includes (a) applying an aqueous polymer dispersion to a textile structure on the basis of a woven or nonwoven fabric, or a leather material; (b) drying the textile structure or leather material; and (c) the stiffening material thus produced is deformed and glued with the textile and leather material to be stiffened, in which an aqueous dispersion of a two-phase, sealable emulsion graft copolymer having a soft phase and a hard phase is applied. The hard phase has a glass transition temperature of Tg of at least 50.degree. C. and includes monomer units such as methyl methacrylate, styrene, diisopropyl fumarate and vinyl chloride. The soft phase has a glass transition temperature Tg of at least 30.degree. C. lower than the Tg of the hard phase, and the soft phase has monomer units such as methyl acrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, vinyl acetate, vinyl propionate, isopropenyl acetate, vinyl laurate, vinyl esters of saturated, .alpha.-branched monocarboxylic acids having 9 to 10 carbon atoms, ethylene, propylene or 1,3-butadiene.