Modified polyethylene naphthalate

Details Modified polyethylene naphthalate Modified polyethylene naphthalate

1988-04-01

1989-01-17

Kight, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528300, 528308, 528354, 528425, 525437, 525439, C08G 6302

Patent

active

047988835

ABSTRACT:
Polyethylene naphthalate is a polyester resin that is highly useful in numerous applications. For instance, polyethylene naphthalate can be molded into a wide variety of products which have outstanding properties. However, polyethylene naphthalate does not crystallize rapidly at temperatures which are normally used in molding operations. This invention discloses a modified polyethylene naphthalate which crystallizes rapidly at much lower temperatures than does polyethylene naphthalate homopolymer. The modified polyethylene naphthalates of this invention contain a small amount of polyether glycol. This invention more specifically relates to a polyester comprised of repeat units which are derived from (a) a naphthalate dicarboxylic acid and (b) a diol component which is comprised of (1) at least one glycol containing from 2 to 12 carbon atoms and (2) from about 1 to about 12 weight percent of at least one polyether glycol based upon the total weight of the polymer.

REFERENCES:
patent: 4122073 (1978-10-01), Georgoudis
patent: 4215032 (1980-07-01), Kobayashi et al.

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