Method of Recovering a Copolymer.
Abstract
The present invention relates to a method for recovering a copolymer used as a binder in pyrotechnic device and, more particularly, to a method for recovering Viton-A, which is a tradename for a copolymer of vinylidene fluoride and hexafluoropropylene. The Viton-A is first dissolved in N-methyl-2-pyrrolidone which has a flash point of 95 degrees C. After Viton-A is dissolved, a flocculant, such as water, is added to the solution and the Viton-A is precipitated and can readily be removed from the liquid. The flocculant and N-methyl-2-pyrrolidone are then separated by fractional distillation. It is therefore a general object of the present invention to provide an improved method for recovering Viton-A from pyrotechnic compositions. Other objects, advantages and novel features of the present invention will become apparent from the following detailed description of the invention.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 09, 1982
- Accession Number
- ADD009748
Entities
People
- Bernard E. Douda
Organizations
- United States Department of the Navy