公开(公告)号：US20240124672A1

公开(公告)日：2024-04-18

申请号：US17964430

申请日：2022-10-12

申请人： FINA TECHNOLOGY, INC.

发明人： Michael A. McLeod ,  Ngoc Niikky Nguyen

IPC分类号： C08J9/12 ,  C08J9/14 ,  C08L23/12

CPC分类号： C08J9/122 ,  C08J9/141 ,  C08L23/12 ,  C08J2203/06 ,  C08J2203/14 ,  C08J2323/12 ,  C08J2423/12 ,  C08L2205/025 ,  C08L2310/00

摘要： A composition including a first polypropylene having at least 90 wt. % propylene by weight of the first polypropylene, an alpha nucleation inhibitor, and a beta nucleation additive is provided. Also provided is a method of preparing a foamable polypropylene composition. The method includes the steps: a) compounding a first polypropylene including at least 90 wt. % propylene by weight of the first polypropylene with an alpha nucleation inhibitor to form a polypropylene blend; b) compounding the polypropylene blend with a blowing agent to form a pre-annealed polypropylene composition; and c) annealing the pre-annealed polypropylene composition at an annealing temperature Ta for an annealing time ta to form the foamable polypropylene composition. The foamable polypropylene composition has a first melting peak T1 and a second melting peak T2 as measured by differential scanning calorimetry at a heating rate of 20° C. per minute.