US 11,912,896 B2
Environment-friendly fire-retardant coating and preparation method thereof
Han Mao, Huzhou (CN); Hong Chen, Huzhou (CN); and Jingyuan Wu, Huzhou (CN)
Assigned to ZHEJIANG MINGNUO NEW MATERIAL TECHNOLOGY CO., LTD, Huzhou (CN)
Filed by ZHEJIANG MINGNUO NEW MATERIAL TECHNOLOGY CO., LTD, Huzhou (CN)
Filed on Aug. 25, 2023, as Appl. No. 18/455,641.
Application 18/455,641 is a continuation of application No. PCT/CN2023/097745, filed on Jun. 1, 2023.
Claims priority of application No. 202210673741.0 (CN), filed on Jun. 15, 2022.
Prior Publication US 2023/0407108 A1, Dec. 21, 2023
Int. Cl. C09D 5/18 (2006.01); A62D 1/00 (2006.01); C09D 5/02 (2006.01); C09D 7/40 (2018.01); C09D 7/63 (2018.01); C09D 175/04 (2006.01)
CPC C09D 5/18 (2013.01) [A62D 1/0021 (2013.01); A62D 1/0092 (2013.01); C09D 5/022 (2013.01); C09D 5/024 (2013.01); C09D 7/63 (2018.01); C09D 7/70 (2018.01); C09D 175/04 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An environment-friendly fire-retardant coating, comprising:
a coating substrate; and
a fire extinguishing agent microcapsule that is ruptured and vaporized to a release fire-extinguishing material to achieve purposes of cooling and/or fire prevention and/or fire extinguishment upon being exposed to a temperature of not less than 75° C. and/or an open flame environment;
wherein a mass fraction of the fire-extinguishing microcapsule in the environment-friendly fire-retardant coating is 40%-70%;
a core-wall ratio of the fire extinguishing agent microcapsule is in a range of 1:1 to 9:1;
a particle size of the fire extinguishing agent microcapsule is 20-400 μm;
the fire extinguishing agent microcapsule comprises:
a core material that vaporizes and absorbs heat when released by heat; and
at least two layers of wall materials containing a polymer material;
the at least two layers of wall materials are capable of being ruptured at a temperature not lower than 75° C.;
the at least two layers of wall materials contain a nano silicon oxide and a nano metal oxide with a weight ratio of 1:(2.5-5);
a total amount of the nano silicon dioxide and the nano metal oxide is 0.05%-0.2% of a dry weight of the at least two layers of wall materials; and
the core material is at least one selected from a group consisting of perfluorohexanone, perfluorohexane, perfluoroheptane, perfluorooctane, dibromotetrafluoroethane and trichlorotrifluoroethane.