公开(公告)号：US11338512B2

公开(公告)日：2022-05-24

申请号：US16701528

申请日：2019-12-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anthony M. Coppola ,  Nicole Ellison ,  Hugh MacDowell

IPC: B29C59/08 ,  B29D22/00 ,  B29C64/30 ,  B33Y70/00 ,  B33Y40/20 ,  B29K105/00 ,  B29L31/18

Abstract: Methods for forming channels within a substrate include molding a sacrificial component directly into the substrate and igniting the sacrificial component to deflagrate of the sacrificial component and form a channel in the substrate. The sacrificial component can include oxidizing agents such as chlorates, perchlorates, nitrates, dichromates, nitramides, and/or sulfates imbedded in a polymeric matrix, and the oxidizing agents can be 30 wt. % to 80 wt. % of the sacrificial component. The sacrificial component can further include one or more of unoxidized metal powder fuels, flammable gas-filled polymeric bubbles, one or more metallocenes and/or one or more metal oxide particles, one or more polymers with nitroester, nitro, azido, and/or nitramine functional groups, one or more burn rate suppressants such as oxamide, ammonium sulphate, calcium carbonate, calcium phosphate, and ammonium chloride, and non-combustible hollow bubbles and/or inert particles. The polymeric matrix can have a limiting oxygen index of less than about 30.

公开(公告)号：US20210162672A1

公开(公告)日：2021-06-03

申请号：US16701528

申请日：2019-12-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anthony M. Coppola ,  Nicole Ellison ,  Hugh MacDowell

IPC: B29C64/30 ,  B33Y40/20 ,  B33Y70/00

Abstract: Methods for forming channels within a substrate include molding a sacrificial component directly into the substrate and igniting the sacrificial component to deflagrate of the sacrificial component and form a channel in the substrate. The sacrificial component can include oxidizing agents such as chlorates, perchlorates, nitrates, dichromates, nitramides, and/or sulfates imbedded in a polymeric matrix, and the oxidizing agents can be 30 wt. % to 80 wt. % of the sacrificial component. The sacrificial component can further include one or more of unoxidized metal powder fuels, flammable gas-filled polymeric bubbles, one or more metallocenes and/or one or more metal oxide particles, one or more polymers with nitroester, nitro, azido, and/or nitramine functional groups, one or more burn rate suppressants such as oxamide, ammonium sulphate, calcium carbonate, calcium phosphate, and ammonium chloride, and non-combustible hollow bubbles and/or inert particles. The polymeric matrix can have a limiting oxygen index of less than about 30.