Continuous dyeing and simultaneous finishing of textile materials using defoaming agent of polyoxyalkylene polysiloxane copolymer and hydrophobic silica

US4380451A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Helmut Steinberger · Leverkusen, DE
• Wilfried Kortmann · Hagen, DE
• Jurgen Tuschen · Much, DE

Key dates

• Filing date: Sep 24, 1981
• Grant date: Apr 19, 1983
• Expiry date: Sep 24, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/929
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A de-foaming agent comprising by weight about PA0 (a) 80 to 100 parts of a polyoxyalkylene-polysiloxane copolymer of the formula: EQU [R.sup.1 Si(OSiR.sub.2).sub.n ].sub.m Z.sub.m-1 (OR.sup.2).sub.m+2, in which PA1 R represents an optionally halogen-substituted alkyl-group with up to 4 carbon atoms, PA1 R.sup.1 represents the substituent R or a phenyl radical, PA1 R.sup.2 represents a group of the composition ##STR1## Z represents the difunctional unit --O-- or ##STR2## and R.sup.3 denotes a hydrocarbon radical with up to 6 carbon atoms, PA1 R.sup.4 denotes independently from one another hydrogen or R.sup.3, PA1 n denotes a number between 3 and 40, PA1 m denotes a number between 1 and 15, PA1 x denotes a number between 0 and 68, PA1 y denotes a number between 0 and 52, PA1 x+y denotes a number between 1 and 68 and PA1 p denotes a number between 2 and 12, PA0 and (b) 0.5 to 20 parts of a hydrophobic silicon dioxide.