	US 12,281,194 B2
	Environment-friendly and flame-retardant abradable seal coating material with ultra-low density and use method thereof
Haixia Cui, Lanzhou (CN); Lei Chen, Lanzhou (CN); Yue Zhang, Lanzhou (CN); Yanping Wu, Lanzhou (CN); Hongxuan Li, Lanzhou (CN); Huidi Zhou, Lanzhou (CN); and Jianmin Chen, Lanzhou (CN)
Assigned to Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou (CN)
Filed by Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou (CN)
Filed on Jun. 20, 2022, as Appl. No. 17/844,321.
Claims priority of application No. 202111536216.6 (CN), filed on Dec. 15, 2021.
Prior Publication US 2023/0183417 A1, Jun. 15, 2023
Int. Cl. C08G 59/40 (2006.01); C08G 59/44 (2006.01); C08K 7/28 (2006.01)

CPC C08G 59/4071 (2013.01) [C08G 59/44 (2013.01); C08K 7/28 (2013.01); C08G 2190/00 (2013.01)]

15 Claims

1. An environment-friendly and flame-retardant abradable seal coating material with an ultra-low density, including a component A and a component B packaged separately, wherein

the component A includes 20-30 wt % of a curing agent for bisphenol A epoxy resin, 20-30 wt % of a liquid phosphorus-containing curing agent, 20-40 wt % of a hollow glass microbead, 1-5 wt % of 2,4,6-tris (dimethylaminomethyl) phenol, 5-15 wt % of dimethyl methylphosphonate and 0.5-3 wt % of a silane coupling agent; and

the component B includes 30-40 wt % of a bisphenol A epoxy resin, 30-40 wt % of a liquid phosphorus-containing epoxy resin, 20-30 wt % of a hollow glass microbead, 0-10 wt % of a liquid acrylonitrile-butadiene rubber and 0.5-3 wt % of a silane coupling agent;

wherein the liquid phosphorus-containing epoxy resin has a phosphorus content of 2-4 wt %, a density of 1.05-1.12 g/cm³and an epoxy value of 1.20-1.22.