Polyetherimide blends, and molding method
AssigneeGeneral Electric Company
InventorsTohru Takekoshi, Patricia P. Anderson
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Abstract
A method is provided for enhancing the crystallization rate of certain polyetherimide to provide an improved molding mehod for making solvent resistant shaped thermoplastics. Polyetherimide blends containing crystallization rate enhancing agents such as bisimides or imide oligomers also are provided.
Claims8
Molding compositions comprising polyetherimides consisting essentially of chemically combined groups of the formula ##STR20## and an effective amount of a crystallization rate enhancing agent where Q and Q.sup.1 are the same or different divalent aromatic groups having the formula, ##STR21## where J is oxygen or sulfur, and n and m are separately 0 or 1.
A method for enhancing the rate of crystallization of a polyetherimide consisting essentially of chemically combined units of the formula ##STR22## which comprises (1) molding at the temperature of from 250.degree. C. to 450.degree. C., a mixture comprising a polyetherimide, an effective amount of a crystallization rate enhancing agent, and
- (2) recovering a crystalline polyetherimide article from step (1),
- where Q and Q.sup.1 are the same or different divalent aromatic groups having the formula, ##STR23## where J is oxygen or sulfur, and n and m are separately 0 or 1.
Dependencies are inferred from the claim text.