US 11,912,872 B1
Light, thin, warm-keeping and temperature-adjusting modified polymer aerogel composite material and preparation method thereof
Yujing Duan, Beijing (CN); Sining Mao, Beijing (CN); and Qingsheng Zhao, Beijing (CN)
Assigned to SYCORETO CAS CO., LTD., Beijing (CN)
Filed by Sycoretc CAS Co., Ltd., Beijing (CN)
Filed on Apr. 12, 2023, as Appl. No. 18/133,541.
Claims priority of application No. 202211299537.3 (CN), filed on Oct. 24, 2022.
Int. Cl. C08L 9/02 (2006.01); C08J 9/10 (2006.01)
CPC C08L 9/02 (2013.01) [C08J 9/103 (2013.01); C08J 2203/04 (2013.01); C08J 2309/02 (2013.01); C08J 2477/06 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A polyamide/NBR blended elastomer microcellular foaming material, comprising the following components in parts by mass:
40-80 parts of NBR, 20-60 parts of polyamide, 0-100 parts of a filler, 0-50 parts of a plasticizer, 0.5-4 parts of a vulcanizing agent, 0-5 parts of a vulcanization accelerator, 1-3 parts of an antioxidant, 2-10 parts of a foaming agent, 0.5-4 parts of an active agent, and 1-4 parts of an anti-scorching agent;
wherein the polyamide/NBR blended elastomer microcellular foaming material has a bimodal cell size distribution;
the polyamide/NBR blended elastomer microcellular foaming material is prepared by the following method:
1) mixing processing: setting a temperature of an internal mixer above 60° C., firstly adding polyamide, adding NBR into the internal mixer after the polyamide is melted, then optionally adding a filler, optionally adding a plasticizer, and adding an antioxidant in turn; mixing for a first time, then setting a temperature of an open mill below 60° C., adding a vulcanizing agent, optionally adding a vulcanizing accelerator, optionally adding a foaming agent, optionally adding an active agent; mixing for a second time, discharging to obtain a rubber compound;
2) obtaining the polyamide/NBR blended elastomer microcellular foaming material with the bimodal cell size distribution and a topological and closed-cell foaming structure by a two-stage curing method: putting the rubber compound into an extruder, and extruding a required shape to obtain a molded rubber compound; putting the molded rubber compound into a molding machine at a temperature above 120° C. for a first curing; then raising the temperature to above 150° C. for a second curing, and then preparing the polyamide/NBR blended elastomer microcellular foaming material with the bimodal cell size distribution and the topological and closed-cell foaming structure by a rapid cooling method.