Wholly aromatic heat-stable liquid crystalline polyester resin composition with improved melt flowability
AssigneeKabushiki Kaisha Ueno Seiyaku Oyo Kenkujo
InventorsJun-ichi Suenaga, Takamasa Owaki, Masaru Egawa
Life of this patent
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Abstract
A wholly aromatic liquid crystalline polyester resin composition comprising about 97-60 parts by weight of a wholly aromatic polyester resin (A) having melting peak determined by DSC equal to or higher than 310° C.; and about 3-40 parts by weight of a wholly aromatic polyester resin (B) having melting peak determined by DSC equal to or lower than 300° C. is provided. The novel liquid crystalline polyester resin composition of the present invention exhibits an improved melt flowability and can provide a molded article having reflow-soldering heat resistance.
Claims5
A wholly aromatic liquid crystalline polyester resin composition comprising
- about 97-60 parts by weight of a wholly aromatic polyester resin (A) having melting peak determined by differential scanning calorimetry equal to or higher than 310° C.;
- and
- about 3-40 parts by weight of a wholly aromatic polyester resin (B) having melting peak determined by differential scanning calorimetry equal to or lower than 300° C. provided that the resin (A) is a copolymer composed of p-hydroxybenzoic acid, 2-hydroxy-6-napthoic acid, hydroquinone and terephthalic acid, or a copolymer composed of p-hydroxybenzoic acid, 2-hydroxy-6-napththoic acid, hydroquinone and 2,6-naphthalenedicarboxylic acid;
- and the resin (B) is a copolymer composed of p-hydroxy benzoic acid and 2-hydroxy-6-naphthoic acid.
A method to improve flowability of a wholly aromatic liquid crystalline polyester resin (A) having melting peak determined by differential scanning calorimetry equal to or higher than 310° C.;
- comprising the step of compounding 3-40 parts by weight of a holly aromatic liquid crystalline polyester resin (B) having melting peak determined by differential scanning calorimetry equal to or lower than 300° C. into 97-60 parts by weight of the quid crystalline polyester resin (A) to give a resin composition provided that the resin (A) is a copolymer composed of p-hydroxybenzoic acid, 2-hydroxy-6-naphthoic acid, hydroquinone and terephthalic acid, or a copolymer composed of p-hydroxybenzoic acid 2-hydroxy-6-naphthoic acid, hydroquinone and 2,6-naphthalenedicarboxylic acid;
- and the resin (B) is a copolymer composed of p-hydroxy benzoic acid and 2-hydroxy-6-naphthoic acid.
Dependencies are inferred from the claim text.