US 4,454,091 A · Solutions, which can be shaped, from mixtures of cellulose and polyvinyl chloride, and shaped articles resulting therefrom and the process for their manufacture

Abstract

The present invention relates to new polymer solutions which make it possible to obtain shaped articles such as yarns and fibres, films, sheets and the like. These solutions consist of cellulose having a degree of polymerization of at least 200, polyvinyl chloride, dimethyl sulphoxide and formaldehyde, the weight ratio cellulose/polyvinyl chloride being 0.05 to 0.5, preferably 0.1 to 0.5, the ratio formaldehyde/cellulose being 0.2 to 2 and the total polymer concentration being 6 to 20%, preferably 10 to 18%. Such solutions are particularly suitable for the manufacture of filaments consisting of fibrils substantially orientated along the axis of the fibre and closely interlaced, the cellulose macromolecules being partially involved in a crystal lattice characteristic of cellulose II. The filaments possess valuable properties for textile use.

Claims20

Dependent claims

Process for the manufacture of yarns, filaments and fibers, said process comprising:

(a) providing a spinnable solution consisting essentially of:
cellulose having a degree of polymerization of at least 200;
polyvinyl chloride polymer selected from the group consisting of vinyl chloride homopolymers, copolymers thereof containing at least 80% by weight of vinyl chloride units and up to 20% by weight of copolymerizable other monomer units, and mixtures of vinyl chloride homopolymer with super chlorinated polyvinyl chloride;
dimethyl sulfoxide;
and
formaldehyde;
the weight ratio of cellulose/polyvinyl chloride polymer being between 0.05 and 0.5, the weight ratio of formaldehyde/cellulose being between 0.2 and 2, the total polymer concentration of the solution being between 6 and 20% by weight, and the chlorine content of the polyvinyl chloride polymer being at least 45% by weight;
and
(b) spinning said solution through a spinnerette into contact with a coagulating medium to obtain said yarns, filaments and fibers.

6 more elements

Dependencies are inferred from the claim text.

Solutions, which can be shaped, from mixtures of cellulose and polyvinyl chloride, and shaped articles resulting therefrom and the process for their manufacture

Life of this patent

Solutions, which can be shaped, from mixtures of cellulose and polyvinyl chloride, and shaped articles resulting therefrom and the process for their manufacture

Life of this patent

Abstract

Claims20