Fire retardant foams comprising expandable graphite, amine salts and phosphorous polyols

• US 5,173,515 A
• Filed: 05/10/1990
• Issued: 12/22/1992
• Est. Priority Date: 05/30/1989
• Status: Expired due to Term

• Current Assignee: Lanxess Deutschland GmbH (Lanxess AG), Plüss-Staufer AG
• Original Assignee: Bayer AG
• Inventors: von Bonin, Wulf, Schapel, Dietmar
• Primary Examiner(s): Welsh, Maurice J.
• Assistant Examiner(s): GORR, RACHEL F
• Application Number:
  US07/521,789
• Time in Patent Office: 957 Days
• Field of Search: 521/55, 521/65, 521/103, 521/107, 521/165, 521/168, 521/169, 521/906, 521/907, 521/105, 521/121, 521/128, 521/129
• US Class Current: 521/103
• CPC Class Codes: C09K 21/06 Organic materials
• CPC Class Codes: C09K 21/14 Macromolecular materials
• CPC Class Codes: E04B 1/94 against fire fire protection of partitions E04B2/7403, E04B2/7409; supporting constructions for ceilings having the capability of expansion in case of fire E04B9/08; fire-fighting A62C, e.g. fire prevention or containment A62C2/00; impregnation of wood or similar materials B27K; fireproof paints C09D5/18; fireproofing materials C09K21/00; flame-resistant papers D21H5/0002; coverings or linings, e.g. for walls or ceilings, in general E04F13/00; fireproof doors E06B5/16; firebreak devices for pipes or the like passing through walls F16L5/04; protection of pipes by means of non-inflammable material F16L57/04
• CPC Class Codes: Y10S 521/906 Polyurethane cellular product containing unreacted flame-retardant material
• CPC Class Codes: Y10S 521/907 Nonurethane flameproofed cellular product

Abstract

New particularly effective fire retardent elements based on foams and expandable graphite are characterized in that they additionally contain one or more components from the group consisting of phosphate-containing polyols, borates and amine salts.

Claims

1. A fire retardant element comprising a foam containing expandable graphite, one or more phosphorus-containing polyols, and one or more amine salts wherein the compounds are present in the following amounts;

2 to 30% by weight of phosphorus-containing polyols, and 2 to 30% by weight of amine salts, the total amounts of said polyols and amine salts comprising not more than 50% by weight of the total weight of the fire retardant element.

2. A fire retardant element of claim 1, in which the foam comprises a polyurethane.

3. A fire retardant element of claim 1, which has additionally been provided with a fire retardant finish.

4. A fire retardant element of claim 1, which additionally contains customary additives.

5. A fire retardant element of claim 1, which additionally contains customary fire retardant additives, customary other fillers and/or customary auxiliaries.

6. A fire retardant element of claim 1, in which the expandable graphite contained in it comprises intercalation compounds of SO_x, NO_x, halogen and/or strong acids in graphite.

7. A fire retardant element of claim 1, which contains 1 to 50% by weight of expandable graphite, relative to the ready-for-use fire retardant element.

10. A fire retardant element of claim 1 additionally comprising one or more borates, wherein the total amount of said polyols, amine salts and borates comprises not more than 50% by weight of the total weight of the fire retardant element.

8. A process for the production of a fire retardant element comprising a foam, in which an expandable graphite and a phosphorus-containing polyol and an amine salt are added to the reaction mixture for the preparation of the particular foam.

11. The process of claim 8, wherein a borate is also added to the reaction mixture.

9. A process for the production of a fire retardant element comprising a foam, in which an expandable graphite and a phosphorus-containing polyol and an amine salt are added to a component for the preparation of the particular foam.

12. The process of claim 9, wherein a borate is also added to the reaction mixture.