| abstract |
Provided is a flame retardant combination polyether, prepared from the following raw material components in parts by weight: 10-25 parts of first polyether polyol, 20-40 parts of second polyether polyol, 30-60 parts of polyester polyol, 2.5-3.5 parts of a surfactant, 0.1-0.6 part of a first catalyst, 0.3-1.0 part of a second catalyst, 0.6-1.5 parts of a third catalyst, 15-30 parts of a flame retardant, 1.5-2.3 parts of a chemical foaming agent, 2.0-3.2 parts of an additive, and 10-16 parts of a physical foaming agent, wherein the sum of the use amount of the first polyether polyol, the second polyether polyol, and the polyester polyol is 100 parts, and the polyester polyol is an aromatic polyester polyol having a flame retardant structure and the additive comprises an aliphatic ketone. Also provided are a thermal insulating material for a polyisocyanurate sheet material and a preparation method therefor, prepared from a first component and a second component, wherein the first component is formed by mixing the raw material components of the flame retardant combination polyether above, and the second component is polymethylene polyphenyl polyisocyanate. |