METHOD OF MAKING A BIODEGRADABLE THERMAL INSULATION COMPOSITE BASED ON POLY (BETA-HYDROXYBUTYRATE)

    公开(公告)号:US20250051530A1

    公开(公告)日:2025-02-13

    申请号:US18231446

    申请日:2023-08-08

    Abstract: A method of making a biodegradable thermal insulation composite based on poly(β-hydroxybutyrate) includes immersing powdered date palm fibers in a silane-grafting solution to produce silylated date palm fibers. The silylated date palm fibers are then suction filtered, washed with deionized water, and dried. The silylated date palm fibers are then melt extruded with poly(β-hydroxybutyrate) pellets to produce the biodegradable thermal insulation composite. The biodegradable thermal insulation composite may then be hot-pressed in a mold and may be further annealed. Alternatively, polylactic acid or poly(β-hydroxybutyrate) is dissolved in chloroform to form a solution. The solution is heated and poured on a volume of powdered date palm fibers such that a surface thereof is completely covered with the solution. The covered date palm fibers are then melt extruded with poly(β-hydroxybutyrate) pellets to produce the biodegradable thermal insulation composite, followed by hot-pressing in a mold and annealing.

    Polyimide resin composition
    2.
    发明授权

    公开(公告)号:US12215196B2

    公开(公告)日:2025-02-04

    申请号:US17611691

    申请日:2020-05-07

    Abstract: A polyimide resin composition includes a polyimide resin (A) including a repeating structural units of formulas (1) and (2). The content ratio of the repeating structural unit of the formula (1) with respect to the total of the repeating structural units of the formulas (1) and (2) is 20 to 70 mol %. The polyimide resin composition further includes a fatty acid metal salt (B) including a fatty acid having 12 to 36 carbon atoms and optionally having a hydroxy group and at least one of an alkali metal, an alkaline earth metal, and a transition metal: wherein R1 represents a divalent group having 6 to 22 carbon atoms containing at least one alicyclic hydrocarbon structure; R2 represents a divalent chain aliphatic group having 5 to 16 carbon atoms; and X1 and X2 each independently represent a tetravalent group having 6 to 22 carbon atoms containing at least one aromatic ring.

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