Far Eastern New Century has filed a patent for a multi-block copolyester ether thermoplastic elastomer foam. The foam is made from an aromatic polyester compound and contains a short-chain structure, a long-chain structure, and a residual functional group of a chain extender. The foam has a melting point not higher than 170°C and a melt flow index less than 20 g/10 min. The content of the polyether diol block structure in the foam is between 45 parts and 65 parts per 100 parts by weight. GlobalData’s report on Far Eastern New Century gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Far Eastern New Century, biodegradable Polyesters was a key innovation area identified from patents. Far Eastern New Century's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.
A multi-block copolyester ether thermoplastic elastomer foam
A recently filed patent (Publication Number: US20230151178A1) describes a multi-block copolyester ether thermoplastic elastomer foam. The foam is prepared from an aromatic polyester compound and consists of a short-chain structure, a long-chain structure, and a residual functional group of a chain extender. The foam has a melting point not higher than 170° C. and a melt flow index less than 20 g/10 min.
The short-chain structure of the foam includes an aromatic dicarboxylic acid ethylene glycol ester block structure and an aromatic dicarboxylic acid butylene glycol ester block structure. These structures are formed through depolymerization or partial depolymerization reactions of the aromatic polyester compound. The aromatic dicarboxylic acid ethylene glycol ester block structure and the aromatic dicarboxylic acid butylene glycol ester block structure can comprise p-phenylene, m-phenylene, or a combination thereof.
The long-chain structure of the foam is formed by a reaction of a polyether diol block structure. This block structure is created by reacting a polytetramethylene ether glycol with a depolymerized reaction product of the aromatic polyester compound. The weight average molecular weight of the polytetramethylene ether glycol ranges from 650 g/mole to 4000 g/mole.
The foam also contains a residual functional group of a chain extender, which can be an epoxy group, isocyanate group, methylol group, imino group, or a combination thereof. Additionally, the foam may include a sulfonic acid group residue, such as 5-sulfoisophthalic acid or 5-sulfoisophthalic acid sodium salt.
The patent also describes a method for preparing the multi-block copolyester ether thermoplastic elastomer foam. The method involves reprocessing a polyethylene terephthalate material through an alcoholysis reaction with 1,4-butanediol, followed by a transesterification reaction with a catalyst. The resulting intermediate is then polymerized with polytetramethylene ether glycol to obtain the foam. The foam is further processed through a chemical foaming process.
The multi-block copolyester ether thermoplastic elastomer foam has potential applications in various industries, including the production of sport shoe midsoles. The foam exhibits desirable properties, such as a permanent compression set value not higher than 50%, a rebound rate higher than 60%, and a shore C hardness not less than 50.
Overall, this patent presents a novel multi-block copolyester ether thermoplastic elastomer foam and a method for its preparation, offering potential benefits in various applications.
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