Composition and method for insulating foam
OwnerAniq Sufiinventor
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Abstract
An insulating foam composition, comprising a polyisocyanate component and a resin component that includes a polyepoxide, an aromatic polyester polyol, and a melamine resin. The foam will remain stable at temperatures up to 400.degree. F., continuously, and up to 450.degree. F., intermittently, and can be applied by spraying, pouring, or frothing directly onto surface of high temperature industrial apparatus.
Claims39
A rigid insulating foam composition that is resistant to dimensional change, degradation, and cracking at temperatures up to 400.degree. F. continuous and up to 450.degree. F. intermittent, comprising:
- a. a polyisocyanate component in an amount between about 50 and 80 percent by weight with an isocyanate equivalent weight of between about 80 and 175;
- and
- b. a resin component in an amount between about 20 and 50 percent by weight, including:
- i. a polyepoxide in an amount of between about 0 and 17 percent by weight of the resin component,
- ii. an aromatic polyester polyol in an amount between about 20 and 30 percent by weight of the resin component, and
- iii. a melamine resin in an amount between about 15 and 30 percent by weight of the resin component.
A rigid insulating foam composition that is resistant to dimensional change degradation, and cracking at temperatures up to 400.degree. F. continuous and up to 450.degree. F. intermittent, comprising:
- a. a polyisocyanate component in an amount between about 50 and 80 percent by weight with an isocyanate equivalent weight of between about 80 and 175;
- and
- b. a resin component in an amount between about 20 and 50 percent by weight, including:
- i. an aromatic polyester polyol in an amount sufficient to create urethane linkages to make the insulating foam composition dimensionally stable and non-friable;
- ii. a polyepoxide in an amount sufficient to initiate cellular polymers;
- iii. a melamine resin in an amount sufficient to impart cross-linking of aromatic structures.
A method of insulating a high-temperature industrial apparatus, comprising the step of applying to the high-temperature industrial apparatus a rigid insulating foam composition that is resistant to dimensional change, degradation, and cracking at temperatures up to 400.degree. F. continuous and up to 450.degree. F. intermittent and that includes:
- a. a polyisocyanate component in an amount between about 50 and 80 percent by weight with an isocyanate equivalent weight of between about 80 and 175;
- and
- b. a resin component in an amount between about 20 and 50 percent by weight, including:
- i. a polyepoxide in an amount of between about 0 and 17 percent by weight of the resin component,
- ii. an aromatic polyester polyol in an amount between about 20 and 30 percent by weight of the resin component, and
- iii. a melamine resin in an amount between about 15 and 30 percent by weight of the resin component.
A rigid insulating foam composition that is resistant to dimensional change, degradation, and cracking at temperatures up to 400.degree. F. continuous and up to 450.degree. F. intermittent, comprising:
- a. a polyisocyanate component in an amount between about 50 and 80 percent by weight with an isocyanate equivalent weight of between about 80 and 175;
- and
- b. a resin component in an amount between about 20 and 50 percent by weight, including:
- i. a polyepoxide in an amount of between about 0 and 17 percent by weight of the resin component,
- ii. an aromatic polyester polyol in an amount between about 20 and 30 percent by weight of the resin component,
- iii. a melamine resin in an amount between about 15 and 30 percent by weight of the resin component, and
- iv. a blowing agent including pentane.
Dependencies are inferred from the claim text.