公开(公告)号：US20230347557A1

公开(公告)日：2023-11-02

申请号：US18211784

申请日：2023-06-20

Applicant: UT-Battelle, LLC

Inventor： Diana Hun ,  Tomonori Saito ,  James W. Klett ,  Tristan M. Alexander ,  Som S. Shrestha ,  Ryan K. Duncan ,  Kaushik Biswas ,  Bingrui Li

IPC: B29C44/50 ,  C08K3/04 ,  B29C44/02 ,  C08K3/34 ,  C08J9/228

CPC classification number: B29C44/505 ,  B29C44/02 ,  C08J9/228 ,  C08K3/04 ,  C08K3/346 ,  B29K2101/12 ,  C08J2329/02

Abstract: A method of forming a polymeric vacuum insulation board is provided, the polymeric vacuum insulation board including a plurality of evacuated, closed-cell pores therein. In one embodiment, the method includes intermixing a polymer with zeolite particles that contain water and extruding the resulting composition under high pressure. During extrusion, water in the zeolite particles evaporates and creates a porous, closed-cell microstructure within a polymer matrix. As the polymer matrix cools and solidifies, water vapor is reabsorbed by the zeolite, which at least partially evacuates the closed-cell pores. In another embodiment, the method includes intermixing a polymer with expandable graphite particles and extruding the resulting composition under high pressure. During extrusion, the expandable graphite particles define evacuated voids. The polymer binder can be selected to include low gas permeance, for example ethylene vinyl alcohol (EvOH) or polyvinylidene chloride (PVDC). In some applications, the polymer can be blended with nano-clays or other additives to further decrease the gas permeance of the vacuum insulation board.

公开(公告)号：US20210154894A1

公开(公告)日：2021-05-27

申请号：US17105727

申请日：2020-11-27

Applicant: UT-Battelle, LLC

Inventor： Diana Hun ,  Tomonori Saito ,  James W. Klett ,  Tristan M. Alexander ,  Som S. Shrestha ,  Ryan K. Duncan ,  Kaushik Biswas ,  Bingrui Li

IPC: B29C44/50 ,  B29C44/02 ,  C08J9/228 ,  C08K3/34 ,  C08K3/04

Abstract: A method of forming a polymeric vacuum insulation board is provided, the polymeric vacuum insulation board including a plurality of evacuated, closed-cell pores therein. In one embodiment, the method includes intermixing a polymer with zeolite particles that contain water and extruding the resulting composition under high pressure. During extrusion, water in the zeolite particles evaporates and creates a porous, closed-cell microstructure within a polymer matrix. As the polymer matrix cools and solidifies, water vapor is reabsorbed by the zeolite, which at least partially evacuates the closed-cell pores. In another embodiment, the method includes intermixing a polymer with expandable graphite particles and extruding the resulting composition under high pressure. During extrusion, the expandable graphite particles define evacuated voids. The polymer binder can be selected to include low gas permeance, for example ethylene vinyl alcohol (EvOH) or polyvinylidene chloride (PVDC). In some applications, the polymer can be blended with nano-clays or other additives to further decrease the gas permeance of the vacuum insulation board.