Block copolyester
AssigneeImperial Chemical Industries PLC
InventorsEric Appelman, Jeffrey Thomas Carter
Life of this patent
Estimating the term…
Abstract
A block copolyester comprises a hard segment and a soft segment, wherein the melting point of the copolyester is greater than or equal to 200° C., and the glass transition temperature of the copolyester is less than or equal to −40° C. The hard segment is preferably polyethylene terephthalate, polybutylene terephthalate, or polyethylene naphthalate. The soft segment is preferably formed from at least one dimer fatty acid and/or dimer fatty diol and/or equivalent thereof. The copolyester is especially suitable for use in automotive parts, particularly where thermal stability is required.
Claims10
A block copolyester comprising a hard segment and a soft segment wherein the melting point of the copolyester is greater than or equal to 200° C., and the glass transition temperature of the copolyester is less than or equal to −40° C.
A block copolyester comprising a hard segment and a soft segment wherein the melting point of the copolyester is less than 20° C. lower than the melting point of the hard segment, and the glass transition temperature of the copolyester is less than 20° C. higher than the glass transition temperature of the soft segment.
Dependencies are inferred from the claim text.