Liquid crystal polymers

Details Liquid crystal polymers Liquid crystal polymers

2008-01-08

2008-01-08

Boykin, Terressa (Department: 1711)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C514S316000, C514S317000, C514S520000, C514S522000, C558S401000, C558S402000, C558S408000

Reexamination Certificate

active

11511540

ABSTRACT:
Liquid crystal polyester derived from phenylene-naphthalene monomers and one or more comonomers display an improved balance of properties, including low melt viscosity, fast cycle time in molding, very low mold shrinkage, high tensile and/or flexural strength, solvent resistance, excellent barrier properties, low water absorption, low thermal expansion coefficient, excellent thermostability, and/or low flammability. The phenylene-naphthalene monomers areThe one or more comonomers include 4-hydroxybenzoic acid, 2-hydroxy-6-naphthoic acid, terephthalic acid, isophthalic acid, and derivatives and combinations thereof.

REFERENCES:
patent: 5146025 (1992-09-01), Koyama et al.
patent: 7148311 (2006-12-01), Benicewicz et al.

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