Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2007-11-27
2007-11-27
Boykin, Terressa (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C264S244000, C428S035700, C528S279000, C528S480000
Reexamination Certificate
active
10504529
ABSTRACT:
The object of the present invention is to provide a high quality polyester resin having high productivity, stability and safety, a catalyst for polyester production with high catalytic activity, a method for producing the polyester resin with the catalyst, a polyester resin obtained with the catalyst, and a hollow molded container having the polyester resin. The polyester resin of the present invention satisfies specific parameters regarding polymerizability, stability, and metal content. The catalyst for polyester production satisfies specific parameters. The catalyst particularly preferably has: (a) a solid titanium-containing compound which has a maximum solubility in ethylene glycol of 1,000 ppm or more in terms of converted titanium amount when dissolved in ethylene glycol with heating at 150° C., and which has titanium, oxygen, carbon, and hydrogen, and optionally an alkali metal, and has a Ti—O—C bond; and (b) an alkali metal compound, the molar ratio of the alkali metal atoms to the titanium atom in the catalyst being in the range of 20/1 to 0.1/1.
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Ehara Fujito
Hiraoka Shouji
Hori Hideshi
Maeda Ken
Mukai Nobumasa
Boykin Terressa
Mitsui Chemicals Inc.
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