Thermal insulation foam having low adhesion for high explosives

Patent metadata

Field	Value
Publication number	US-10494313-B2
Application number	US-201715408553-A
Country	US
Kind code	B2
Filing date	Jan 18, 2017
Priority date	Sep 21, 2016
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

Thermal insulation foam for high explosives is applied to the inner surface of warheads and guided weapons filled with high explosives, thus maximizing the storability and survivability of warheads and guided weapons despite changes in temperature and external environmental factors such as impacts. The thermal insulation foam includes porous microspheres, a prepolymer having a hydroxyl group, and an isocyanate, wherein the prepolymer includes any one selected from among a polybutadiene-, a polyester-, a polyether-, a polysiloxane-, and a fluorine-based prepolymer.

First claim

What is claimed is:

1. A thermal insulation foam for high explosives, comprising:
porous microspheres,
a prepolymer having a hydroxyl group; and
an isophorone diisocyanate,
wherein the prepolymer comprises a polysiloxane-based prepolymer,
wherein the polysiloxane-based prepolymer having a hydroxyl group is represented by Chemical Formula 1 below:

wherein R 1 or R 2 is any one selected from among hydrogen, an alkyl group, a cycloalkyl group, and an aryl group,
R 3 or R 4 is any one selected from among methylene oxide, ethylene oxide, propylene oxide, and alkylene oxide, and
a degree of polymerization n is a numeral ranging from 1 to 100, and a degree of polymerization m is a numeral ranging from 1 to 20.

2. The thermal insulation foam of claim 1 , wherein the porous microspheres comprise either or both of hollow glass microspheres and hollow organic microspheres having a polymer thin-film layer.

3. The thermal insulation foam of claim 1 , further comprising a diol chain extender, a plasticizer, a urethane reaction catalyst, or a curing catalyst.

Assignees

• Agency Defense Dev

Inventors

• Kim Jin-Seuk
• Kwon Young-Hwan

Classifications

• C08J2383/04

  Polysiloxanes · CPC title

• C08L2203/16

  used for films · CPC title

• C08G18/76

  aromatic · CPC title

• C08G77/16

  to hydroxy groups · CPC title

• C08J9/0004

  Use of compounding ingredients, the chemical constitution of which is unknown, broadly defined, or irrelevant · CPC title