Copolymers of cyclic esters and cyclic formals

Details Copolymers of cyclic esters and cyclic formals Copolymers of cyclic esters and cyclic formals

2006-12-19

2006-12-19

Sergent, Rabon (Department: 1711)

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

C528S355000, C528S356000, C528S365000, C560S002000, C560S129000

Reexamination Certificate

active

07151155

ABSTRACT:
Disclosed are copolymers of cyclic esters, e.g., caprolactone, and cyclic formals of substituted or unsubstituted diols, e.g., 1,3-dioxepane. The copolymers can provide a low melting temperature rendering them liquids at room temperature. Elastomeric polyurethanes prepared from such copolymers can exhibit a low Tg transition and good resistance to hydrolysis and oxidation. The copolymers are particularly useful for elastomers, coatings, adhesives, inks or binders requiring low temperature flexibility and good resistance to hydrolysis and oxidation.

REFERENCES:
patent: 4233408 (1980-11-01), Satterly et al.
patent: 5449743 (1995-09-01), Kobayashi et al.
patent: 6689463 (2004-02-01), Chou et al.
patent: 2050106 (1971-03-01), None
patent: 1332862 (1973-10-01), None

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