New flame retardant compositions of matter and cellulosic products containing same

• US 4,888,136 A
• Filed: 05/02/1988
• Issued: 12/19/1989
• Est. Priority Date: 05/02/1988
• Status: Expired due to Term

• Current Assignee: Dover Corporation
• Original Assignee: Witco Corporation (Lanxess AG)
• Inventors: Shah, Mukund C., Chellapa, Karumpatti L.
• Primary Examiner(s): Locker, Howard J.
• Application Number:
  US07/189,058
• Time in Patent Office: 596 Days
• Field of Search: 252/601, 252/607, 252/602, 252/608, 252/7, 162/159, 162/160, 169/45, 260/DIG. 24, 427/393.3, 427/440, 428/920, 428/921, 8/115.51, 8/181, 8/490, 106/15.05, 106/18.11, 106/18.26, 106/18.33
• US Class Current: 252/607
• CPC Class Codes: C09K 21/06 Organic materials
• CPC Class Codes: D06M 13/207 Substituted carboxylic acids, e.g. by hydroxy or keto groups; Anhydrides, halides or salts thereof
• CPC Class Codes: D21H 17/15 Polycarboxylic acids, e.g. maleic acid
• CPC Class Codes: D21H 17/66 Salts, e.g. alums
• CPC Class Codes: D21H 21/34 Ignifugeants
• CPC Class Codes: Y10S 260/24 Flameproof

Abstract

This application discloses new compositions of matter useful as flame retardants for cellulosic materials comprising ammonium bromide and, at least, one water-soluble aluminum salt of an organic hydroxy acid, such as aluminum citrate or aluminum lactate.

Claims

1. A com position useful as a flame retardant for cellulosic material which comprises ammonium bromide and a flame retardant enhancing amount of at least one water-soluble aluminum salt of an organic hydroxy acid.

2. A composition of claim 1, wherein the organic hydroxy acid is an organic hydroxy carboxylic acid.

3. A composition of claim 1, wherein the water-soluble aluminum salt is aluminum citrate, aluminum lactate, or aluminum tartrate.

4. A composition of claim 1, wherein the water-soluble aluminum salt is aluminum lactate.

5. A composition of claim 1, wherein the water-soluble aluminum salt is aluminum tartrate.

6. A composition of claim 1, wherein the water-soluble, aluminum salt is aluminum citrate.

7. The composition of claim 1, which comprises ammonium sulfate as a second water-soluble ammonium salt.

8. The composition of claim 1, which comprises urea as an additional component.

9. The composition of claim 1, which comprises one or more anti-corrosion compounds as additional components.

10. The composition of claim 1, wherein the water-soluble aluminum salt is present in an amount of at least about 25 percent by weight of the ammonium bromide.

11. The composition of claim 10, wherein the water-soluble aluminum salt is present in an amount of between about 25 percent and about 50 percent by weight of the ammonium bromide.

12. A flame retardant cellulosic composition comprising cellulosic material and a flame retardant effective amount of a flame retardant composition comprising ammonium bromide and a flame retardant enhancing amount of at least one water-soluble aluminum salt of an organic hydroxy acid.

13. A flame retardant cellulosic composition of claim 12, wherein the cellulosic material is paper.

14. A flame retardant cellulosic composition of claim 12, wherein the cellulosic material is kraft paper.

15. A flame retardant cellulosic composition of matter of claim 13, wherein the cellulosic material is wood.

16. A flame retardant composition of matter of claim 12, wherein the cellulosic material is a textile.

17. A flame retardant composition of matter of claim 16, wherein the textile is cotton.

18. A flame retardant cellulosic composition of claim 12, wherein the flame retardant composition is present in an amount of at least about 50 weight percent of the cellulosic material.

19. A flame retardant cellulosic composition of claim 12, wherein the water-soluble aluminum salt is present in an amount of from about 25 to about 50 weight percent of the ammonium bromide.

20. A flame retardant cellulosic composition of claim 12, wherein the flame retardant composition comprises one or more anti-corrosion compounds as additional components.

21. A flame retardant cellulosic composition of claim 12, wherein the flame retardant composition comprises urea as an additional component.

22. A flame retardant cellulosic composition of claim 12, wherein the flame retardant composition comprises ammonium sulfate as a second water soluble ammonium salt.

23. A flame retardant cellulosic composition of claim 22, wherein the ammonium sulfate is present in an amount between about 25 and about 50 weight percent of the ammonium bromide.

24. A flame retardant cellulosic composition of claim 12, wherein the water-soluble aluminum salt is aluminum citrate, aluminum lactate or aluminum tartrate.

25. A flame retardant cellulosic composition of claim 22, wherein the water-soluble aluminum salt is aluminum lactate.

26. A flame retardant cellulosic composition of claim 22, wherein the water-soluble aluminum salt is aluminum tartrate.

27. A flame retardant cellulosic composition of claim 22, wherein the water-soluble aluminum salt is aluminum citrate.

28. A flame retardant composition of claim 25, wherein the aluminum lactate is present in an amount between about 25 and about 50 weight percent of the ammonium bromide.

29. A method for rendering a cellulosic material flame retardant which comprises treating said cellulosic material with a flame retarding amount of an aqueous composition comprising ammonium bromide and a flame retardant enhancing amount of at least one watersoluble aluminum salt of an organic hydroxy acid.

30. A method of claim 29 wherein the flame retardant amount is at least about 50 weight percent of the weight of the cellulosic material.

31. A method of claim 29, wherein the water-soluble aluminum salt is aluminum citrate, aluminum lactate or or aluminum tartrate.

32. A method of claim 31, wherein the water-soluble aluminum salt is aluminum lactate.

33. A method of claim 29, which comprises ammonium sulfate as a second water-soluble ammonium compound.

34. A method of claim 29, which comprises urea as an additional component.

35. A method of claim 29, which comprises one or more anti-corrosion compounds as additional components.

36. A method of claim 30, wherein the water-soluble aluminum salt is present in an amount of at least about 25 percent by weight of the ammonium bromide.

37. A method of claim 35, wherein the water-soluble aluminum salt is present in an amount of between about 25 percent and about 50 percent by weight of the ammonium bromide.