Surfactant composition for gypsum plaster boards
View Patent ↗A gypsum composition including gypsum, water, and a surfactant composition of alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + , in which n is from 6 to 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation. A process for the preparation of the gypsum composition and a gypsum board obtainable from this composition. Finally, a process for the manufacture of gypsum boards. Application for the manufacture of foamed gypsum boards.
1. A gypsum composition comprising, in combination with gypsum and water, a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is from 6 to 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation
wherein the surfactant composition is free from alkyl ether sulfates.
2. The composition according to claim 1 , in which n m of the surfactant composition is between 10.1 and 10.7.
3. The composition according to claim 1 , in which the surfactant composition comprises 0 to 30% by weight of octyl sulfate.
4. The composition according to claim 1 , in which M is chosen from sodium and ammonium.
5. A gypsum board obtained from a gypsum composition according to claim 1 .
6. A gypsum composition comprising, in combination with gypsum and water, a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is from 6 to 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation,
in which the surfactant composition comprises three alkyl sulfates.
7. A gypsum board obtained from a gypsum composition according to claim 6 .
8. A gypsum composition comprising, in combination with gypsum and water, a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is from 6 to 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation,
in which the surfactant composition comprises 40 to 90% by weight of decyl sulfate.
9. A gypsum board obtained from a gypsum composition according to claim 8 .
10. A gypsum composition comprising, in combination with gypsum and water, a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is from 6 to 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation,
in which the surfactant composition comprises 10 to 50% by weight of dodecyl sulfate.
11. A gypsum board obtained from a gypsum composition according to claim 10 .
12. A gypsum composition comprising, in combination with gypsum and water, a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is from 6 to 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation,
in which the surfactant composition comprises 55 to 75% by weight of sodium decyl sulfate, 0 to 15% by weight of sodium octyl sulfate and 18 to 37% by weight of sodium dodecyl sulfate.
13. A gypsum board obtained from a gypsum composition according to claim 12 .
14. A gypsum composition comprising, in combination with gypsum and water, a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is from 6 to 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation,
in which the surfactant composition additionally comprises a sequestering agent.
15. The composition according to claim 14 , in which the sequestering agent is selected from the group consisting of hydroxycarboxylic acids and their salts, aldoses and ketoses, phosphates, borates and polyphosphates, EDTA, NTA, and phosphoric acid derivatives with a polymer structure which comprise at least hydroxyl, amine, or carboxylate groups.
16. A gypsum board obtained from a gypsum composition according to claim 14 .
17. A gypsum composition comprising, in combination with gypsum and water, a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is from 6 to 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation,
in which the surfactant composition additionally comprises a hydrotropic agent.
18. A gypsum board obtained from a gypsum composition according to claim 17 .
19. A process for the manufacture of a gypsum composition, the process comprising:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of the formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water,
wherein the surfactant composition is free from alkyl ether sulfates; and
mixing the gypsum slurry and the surfactant foam.
20. The process according to claim 19 , in which n m of the surfactant composition is between 10.1 and 10.7.
21. The process according to claim 19 , in which the surfactant composition comprises 0 to 30% by weight of octyl sulfate.
22. The process according to claim 19 , in which M is chosen from sodium and ammonium.
23. A process for the manufacture of a gypsum composition, the process comprising:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of the formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water, and in which the surfactant composition comprises three alkyl sulfates; and
mixing the gypsum slurry and the surfactant foam.
24. A process for the manufacture of a gypsum composition, the process comprising:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of the formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water, and in which the surfactant composition comprises 40 to 90% by weight of decyl sulfate; and
mixing the gypsum slurry and the surfactant foam.
25. A process for the manufacture of a gypsum composition, the process comprising:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of the formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water, and in which the surfactant composition comprises 10 to 50% by weight of dodecyl sulfate; and
mixing the gypsum slurry and the surfactant foam.
26. A process for the manufacture of a gypsum composition, the process comprising:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of the formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water, and in which the surfactant composition comprises 55 to 75% by weight of sodium decyl sulfate, 0 to 15% by weight of sodium octyl sulfate and 18 to 37% by weight of sodium dodecyl sulfate; and
mixing the gypsum slurry and the surfactant foam.
27. A process for the manufacture of gypsum boards, comprising the stages of:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water,
wherein the surfactant composition is free from alkyl ether sulfates; and
mixing the gypsum slurry and the surfactant foam;
pouring the gypsum composition between two layers of external material;
drying the gypsum board.
28. The process according to claim 27 , in which n m of the surfactant composition is between 10.1 and 10.7.
29. The process according to claim 27 , in which the surfactant composition comprises 0 to 30% by weight of octyl sulfate.
30. The process according to claim 27 , in which M is chosen from sodium and ammonium.
31. A process for the manufacture of gypsum boards, comprising the stages of:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water, and in which the surfactant composition comprises three alkyl sulfates; and
mixing the gypsum slurry and the surfactant foam;
pouring the gypsum composition between two layers of external material;
drying the gypsum board.
32. A process for the manufacture of gypsum boards, comprising the stages of:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water, and in which the surfactant composition comprises 40 to 90% by weight of decyl sulfate; and
mixing the gypsum slurry and the surfactant foam;
pouring the gypsum composition between two layers of external material;
drying the gypsum board.
33. A process for the manufacture of gypsum boards, comprising the stages of:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water, and in which the surfactant composition comprises 10 to 50% by weight of dodecyl sulfate; and
mixing the gypsum slurry and the surfactant foam;
pouring the gypsum composition between two layers of external material;
drying the gypsum board.
34. A process for the manufacture of gypsum boards, comprising the stages of:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10.1 and 10.7, and M is a monovalent cation, and water; and
in which the surfactant composition comprises 40 to 90% by weight of decyl sulfate, 0 to 30% by weight of octyl sulfate, and 10 to 50% by weight of dodecyl sulfate; and
mixing the gypsum slurry and the surfactant foam;
pouring the gypsum composition between two layers of external material;
drying the gypsum board.
35. The process according to claim 34 , in which M is chosen from sodium and ammonium.
36. The process according to claim 34 , in which the surfactant composition comprises 55 to 75% by weight of sodium decyl sulfate, 0 to 15% by weight of sodium octyl sulfate and 18 to 37% by weight of sodium dodecyl sulfate.
37. A process for the manufacture of a gypsum composition, the process comprising:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of the formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water, and in which the surfactant composition additionally comprises a sequestering agent; and
mixing the gypsum slurry and the surfactant foam.
38. The process according to claim 37 , in which the sequestering agent is selected from the group consisting of hydroxycarboxylic acids and their salts, aldoses and ketoses, phosphates, borates and polyphosphates, EDTA, NTA, and phosphoric acid derivatives with a polymer structure which comprise at least hydroxyl, amine, or carboxylate groups.
39. A process for the manufacture of a gypsum composition, the process comprising:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of the formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water, and in which the surfactant composition additionally comprises a hydrotropic agent; and
mixing the gypsum slurry and the surfactant foam.
40. A process for the manufacture of gypsum boards, comprising the stages of:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition rim being between 10 and 11, and M is a monovalent cation, and water, and in which the surfactant composition additionally comprises a sequestering agent; and
mixing the gypsum slurry and the surfactant foam;
pouring the gypsum composition between two layers of external material;
drying the gypsum board.
41. The process according to claim 40 , in which the sequestering agent is selected from the group consisting of hydroxycarboxylic acids and their salts, aldoses and ketoses, phosphates, borates and polyphosphates, EDTA, NTA, and phosphoric acid derivatives with a polymer structure which comprise at least hydroxyl, amine, or carboxylate groups.
42. A process for the manufacture of gypsum boards, comprising the stages of:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water, and in which the surfactant composition additionally comprises a hydrotropic agent; and
mixing the gypsum slurry and the surfactant foam;
pouring the gypsum composition between two layers of external material;
drying the gypsum board.
43. A gypsum composition comprising, in combination with gypsum and water, a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is from 6 to 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation.
44. The composition according to claim 43 , in which n m of the surfactant composition is between 10.1 and 10.7.
45. The composition according to claim 43 , in which the surfactant composition comprises three alkyl sulfates.
46. The composition according to claim 43 , in which the surfactant composition comprises 40 to 90% by weight of decyl sulfate.
47. The composition according to claim 43 , in which the surfactant composition comprises 0 to 30% by weight of octyl sulfate.
48. The composition according to claim 43 , in which the surfactant composition comprises 10 to 50% by weight of dodecyl sulfate.
49. The composition according to claim 43 , in which M is chosen from sodium and ammonium.
50. The composition according to claim 43 , in which the surfactant composition comprises 55 to 75% by weight of sodium decyl sulfate, 0 to 15% by weight of sodium octyl sulfate and 18 to 37% by weight of sodium dodecyl sulfate.
51. The composition according to claim 43 , in which the surfactant composition additionally comprises a sequestering agent.
52. The composition according to claim 43 , in which the surfactant composition additionally comprises a hydrotropic agent.
53. A process for the manufacture of a gypsum composition comprising the stages of:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of the formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water; and
mixing the gypsum slurry and the surfactant foam.
54. The process according to claim 53 , in which n m of the surfactant composition is between 10.1 and 10.7.
55. The process according to claim 53 , in which the surfactant composition comprises three alkyl sulfates.
56. The process according to claim 53 , in which the surfactant composition comprises 40 to 90% by weight of decyl sulfate.
57. The process according to claim 53 , in which the surfactant composition comprises 0 to 30% by weight of octyl sulfate.
58. The process according to claim 53 , in which the surfactant composition comprises 10 to 50% by weight of dodecyl sulfate.
59. The process according to claim 53 , in which M is chosen from sodium and ammonium.
60. The process according to claim 53 , in which the surfactant composition comprises 55 to 75% by weight of sodium decyl sulfate, 0 to 15% by weight of sodium octyl sulfate and 18 to 37% by weight of sodium dodecyl sulfate.
61. The process according to claim 53 , in which the surfactant composition additionally comprises a sequestering agent.
62. The process according to claim 53 , in which the surfactant composition additionally comprises a hydrotropic agent.
63. A process for the manufacture of gypsum boards, comprising the stages of:
preparing a gypsum slurry from gypsum and water;
forming a foam from a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is a number between 6 and 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10 and 11, and M is a monovalent cation, and water; and
mixing the gypsum slurry and the surfactant foam;
pouring the gypsum composition between two layers of external material;
drying the gypsum board.
64. A gypsum composition comprising, in combination with gypsum and water, a surfactant composition comprising alkyl sulfates of formula H(CH 2 ) n OSO 3 − M + ,
in which n is from 6 to 16, the mean number of carbon atoms in the alkyl sulfate composition n m being between 10.1 and 10.7 and M is a monovalent cation.
65. The composition according to claim 64 , in which the surfactant composition comprises three alkyl sulfates.
66. The composition according to claim 64 , in which the surfactant composition comprises 40 to 90% by weight of decyl sulfate.
67. The composition according to claim 64 , in which the surfactant composition comprises 0 to 30% by weight of octyl sulfate.
68. The composition according to claim 64 , in which the surfactant composition comprises 10 to 50% by weight of dodecyl sulfate.
69. The composition according to claim 64 , in which M is chosen from sodium and ammonium.
70. The composition according to claim 64 , in which the surfactant composition comprises 55 to 75% by weight of sodium decyl sulfate, 0 to 15% by weight of sodium octyl sulfate and 18 to 37% by weight of sodium dodecyl sulfate.
71. The composition according to claim 64 , in which the surfactant composition additionally comprises a sequestering agent.
72. The composition according to claim 64 , in which the surfactant composition additionally comprises a hydrotropic agent.