Solutions based on polyvinyl chloride, the process for their pre

Details Solutions based on polyvinyl chloride, the process for their pre Solutions based on polyvinyl chloride, the process for their pre

1983-03-18

1985-07-16

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524567, C08K 507

Patent

active

045297681

ABSTRACT:
The present invention relates to new homogeneous solutions based on polyvinyl chloride, which can be shaped, the process for their preparation and the shaped articles obtained.
For a polymer concentration of 15 to 35%, the solutions have an effective viscosity of between 15 and 2,000 poises in a solvent medium which has, at ambient temperature, a solubility parameter of between 8 and 11 and a dielectric constant of between 5 and 25, and which gives, with polyvinyl chloride, a variation in effective viscosity with temperature, represented by a curve d.rho./d.theta., which passes through a maximum absolute value. They are obtained by heating a composition of polyvinyl chloride in the solvent medium to a temperature which is at least 25.degree. C. higher than the average temperature corresponding to the maximum of the curve d.rho./d.theta..
The yarns and fibres obtained, which have good properties, can be used by themselves or in a blend for the production of woven fabrics, knitted fabrics, non-woven structures and the like.

REFERENCES:
patent: 2161766 (1939-06-01), Rugeley et al.
patent: 2418507 (1947-04-01), Glenn
patent: 2481294 (1949-09-01), Corbiere et al.
patent: 3073718 (1963-01-01), Lund

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