Ester-forming monomer

Details Ester-forming monomer Ester-forming monomer

2005-03-15

2005-03-15

Teang, Cecilia J. (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C521S040000, C521S048000, C521S048500, C528S481000, C528S492000, C528S496000, C528S503000, C560S096000, C562S480000

Reexamination Certificate

active

06867322

ABSTRACT:
An ester-forming monomer obtained by depolymerization of polytrimethylene terephthalate and having an acrolein content of no greater than 0.5 wt %. Polymers obtained using the monomer and fibers, films and molded articles comprising the polymers. The ester-forming monomer is obtained by reacting polytrimethylene terephthalate with at least one compound selected from among monoalcohols, 1,3-propanediol and water in the presence of a basic substance. When the recovered ester-forming monomer is used as the starting material for production of a polymer, it is possible to produce a molding polymer for fibers, films and the like with quality equivalent to or higher than that obtained using virgin monomer.

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