Invention Grant
- Patent Title: Process for foaming polyolefin compositions using an azodicarbonamide/citrate mixture as a nucleating agent
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Application No.: US16742357Application Date: 2020-01-14
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Publication No.: US11180645B2Publication Date: 2021-11-23
- Inventor: Gangwei Sun , Mohamed Esseghir , Xianmin Xu , Chester J. Kmiec
- Applicant: Dow Global Technologies LLC
- Applicant Address: US MI Midland
- Assignee: Dow Global Technologies LLC
- Current Assignee: Dow Global Technologies LLC
- Current Assignee Address: US MI Midland
- Agent Mark A. Twilley
- Main IPC: C08J9/10
- IPC: C08J9/10 ; C08L23/06 ; C08J9/00 ; B29C48/285 ; H01B3/44 ; C08K3/26 ; C08K5/092 ; C08K5/098 ; C08K5/23 ; C08L23/26 ; B29C48/40

Abstract:
A process of foaming a polyolefin, e.g., polyethylene, composition using as a nucleator a combination of (A) azodicarbonamide, and (B) a mixture of (1) a first component consisting of at least one of citric acid and an alkali metal citrate, and (2) a second component consisting of at least one of an alkali metal citrate, a di-alkali metal hydrogen citrate, an alkali metal dihydrogen citrate and an alkali metal bicarbonate, with the proviso that the mixture is not solely composed of alkali metal citrate.
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