Curable silicone compositions for the protection of polyurethane foam

• US 4,595,610 A
• Filed: 07/02/1984
• Issued: 06/17/1986
• Est. Priority Date: 07/02/1984
• Status: Expired due to Term

• Current Assignee: Dow, Inc.
• Original Assignee: Dow, Inc.
• Inventors: Fey, Kenneth C., Lefler, Harold V. III
• Primary Examiner(s): Lilling, Herbert J.
• Application Number:
  US06/627,136
• Time in Patent Office: 715 Days
• Field of Search: 524/588, 524/860, 524/861, 524/862, 524/863, 528/15, 528/24, 528/33, 528/21, 528/18, 528/32, 428/319.3, 428/425.5, 428/447, 427/244, 427/386, 427/387, 427/395.5, 521/112
• US Class Current: 428/319.3
• CPC Class Codes: C08G 77/12 containing silicon bound to hydrogen C08G77/045 takes precedence
• CPC Class Codes: C08G 77/16 to hydroxyl groups
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 9/365 Coating
• CPC Class Codes: C08K 5/04 Oxygen-containing compounds C08K5/0091 takes precedence
• CPC Class Codes: C08K 5/54 Silicon-containing compounds C08K5/0091 takes precedence
• CPC Class Codes: C08L 2666/28 Non-macromolecular organic substances
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C08L 83/10 Block- or graft-copolymers containing polysiloxane sequences obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00
• CPC Class Codes: Y10T 428/249991 Synthetic resin or natural rubbers
• CPC Class Codes: Y10T 428/31598 Next to silicon-containing [silicone, cement, etc.] layer
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

There is disclosed a room temperature curing silicone for protecting polyurethane foam. The silicone coating provides protection from ultraviolet light, water penetration, and mechanical damage. The silicone coating comprises a particular organosilicon resin, an hydroxy-ended silicone polymer, fillers, and an organotin catalyst.

Claims

1. A composition comprising the product obtained by mixing:

(A) from 1.0 to 400 parts by weight of the reaction product of

(i) an organosilicon resin consisting essentially of R₃ SiO_1/2 units and SiO_4/2 units, wherein R represents a monovalent hydrocarbon radical, and the ratio of R₃ SiO_1/2 units to SiO_4/2 units is from 0.6/1 to 0.9/1, and

(ii) a polyorganohydrogensiloxane;

(B) 100 parts by weight of a polydiorganosiloxane having the general formula HO(R'"'"'₂ SiO)_x H, wherein R'"'"' represents a monovalent hydrocarbon radical and x has a value of from 10 to 1000;

(C) from 1 to 150 parts by weight of a filler; and

(D) from 0.10 to 13.3 parts by weight of an organotin catalyst.

2. A composition as claimed in claim 1 wherein Component (A) is reacted with a reagent selected from the group consisting of acyloxysilanes, oximosilanes, and acyl halides before said mixing.

3. A composition as claimed in claim 1 wherein there is added to said composition from 1 to 40 parts by weight of a compound selected from the group consisting of ketones, aldehydes, carboxylic acids and alkylacetoxysilanes.

4. A composition as claimed in claim 1 wherein there is added to said composition from 0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes.

5. A composition as claimed in claim 1 wherein there is present from 1 to 200 parts of solvent.

6. A composition as claimed in claim 2 wherein there is added to said composition:

1 to 40 parts by weight of a compound selected from the group consisting of ketones, aldehydes, carboxylic acids and alkylacetoxysilanes;

0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes; and

1 to 200 parts of solvent.

7. A composition as claimed in claim 1 wherein Component (A) is present from 50 to 200 parts by weight;

Component (C) is present from 2 to 20 parts by weight; and

Component (D) is present from 1.0 to 6.0 parts by weight.

8. A composition as claimed in claim 7 wherein Component (A) is reacted with a reagent selected from the group consisting of acyloxysilanes, oximosilanes, and acyl halides before said mixing.

9. A composition as claimed in claim 7 wherein there is added to said composition from 1 to 40 parts by weight of a compound selected from the group consisting of ketones, aldehydes, carboxylic acids and alkylacetoxysilanes.

10. A composition as claimed in claim 7 wherein there is added to said composition from 0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes.

11. A composition as claimed in claim 7 wherein there is present from 1 to 200 parts of solvent.

12. A composition as claimed in claim 8 wherein there is added to said composition:

1 to 40 parts by weight of a compound selected from the group consisting of ketones, aldehydes, carboxylic acids and alkylacetoxysilanes;

0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes; and

1 to 200 parts of solvent.

13. A composition as claimed in claim 7 wherein Component (A) is present from 97.0 to 161.0 parts by weight;

Component (C) is present from 5.6 to 10.3 parts by weight; and

Component (D) is present from 1.9 to 3.2 parts by weight.

14. A composition as claimed in claim 13 wherein Component (A) is reacted with a reagent selected from the group consisting of acyloxysilanes, oximosilanes, and acyl halides before said mixing.

15. A composition as claimed in claim 13 wherein there is added to said composition from 1 to 40 parts by weight of a compound selected from the group consisting of ketones, aldehydes, carboxylic acids and alkylacetoxysilanes.

16. A composition as claimed in claim 13 wherein there is added to said composition from 0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes.

17. A composition as claimed in claim 13 wherein there is present from 1 to 200 parts of solvent.

18. A composition as claimed in claim 14 wherein there is added to said composition:

1 to 40 parts by weight of a compound selected from the group consisting of ketones, aldehydes, carboxylic acids and alkylacetoxysilanes;

0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes; and

1 to 200 parts of solvent.

19. A method of protecting polyurethane foam, said method comprising:

(1) applying to said polyurethane foam, a composition comprising the product obtained by mixing;

(A) from 1.0 to 400 parts by weight of the reaction product of

(i) an organosilicon resin consisting essentially of R₃ SiO_1/2 units and SiO_4/2 units, wherein R represents a monovalent hydrocarbon radical, and the ratio of R₃ SiO_1/2 units to SiO_4/2 units is from 0.6/1 to 0.9/1, and

(ii) a polyorganohydrogensiloxane;

(B) 100 parts by weight of a polydiorganosiloxane having the general formula HO(R'"'"'₂ SiO)_x H, wherein R'"'"' represents a monovalent hydrocarbon radical and x has a value of from 10 to 1000;

(C) from 1 to 150 parts by weight of a filler; and

(D) from 0.10 to 13.3 parts by weight of an organotin catalyst; and

(2) allowing said product to cure, thus forming a laminate.

20. A method as claimed in claim 19 wherein the product is applied as two coats.

21. A method as claimed in claim 20 wherein Component (A) is reacted with a reagent selected from the group consisting of acyloxysilanes, oximosilanes, and acyl halides before said mixing.

22. A method as claimed in claim 20 wherein there is added to said composition from 1 to 40 parts by weight of a compound selected from the group consisting of ketones, aldehydes, carboxylic acids and alkylacetoxysilanes.

23. A method as claimed in claim 20 wherein there is added to said composition from 0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes.

24. A method as claimed in claim 20 wherein there is present from 1 to 200 parts of solvent.

25. A method as claimed in claim 21 wherein there is added to said composition:

1 to 40 parts by weight of a compound selected from the group consisting of ketones, aldehydes, carboxylic acids and alkylacetoxysilanes;

0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes; and

1 to 200 parts of solvent.

26. A method as claimed in claim 20, wherein Component (A) is present from 50 to 200 parts by weight;

Component (C) is present from 2 to 20 parts by weight; and

Component (D) is present from 1.0 to 6.0 parts by weight.

27. A method as claimed in claim 26 wherein Component (A) is reacted with a reagent selected from the group consisting of acyloxysilanes, oximosilanes, and acyl halides before said mixing.

28. A method as claimed in claim 26 wherein there is added to said composition from 1 to 40 parts by weight of compound selected from the group consisting of ketones, aldehydes, carboxylic acids, and alkylacetoxysilanes.

29. A method as claimed in claim 26 wherein there is added to said composition from 0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes.

30. A method as claimed in claim 26 wherein there is present from 1 to 200 parts of solvent.

31. A method as claimed in claim 27 wherein there is added to said composition:

1 to 40 parts by weight of a compound selected from the group consisting of ketones, aldehydes, carboxylic acids and alkylacetoxysilanes;

0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes; and

1 to 200 parts of solvent.

32. A method as claimed in claim 26, wherein Component (A) is present from 97.0 to 161.0 parts by weight;

Component (C) is present from 5.6 to 10.3 parts by weight; and

Component (D) is present from 1.9 to 3.2 parts by weight.

33. A method as claimed in claim 32 wherein Component (A) is reacted with a reagent selected from the group consisting of acyloxysilanes, oximosilanes, and acyl halides before said mixing.

34. A method as claimed in claim 32 wherein there is added to said composition from 1 to 40 parts by weight of a compound selected from the group consisting of ketones, alkehydes, carboxylic acids and alkylacetoxysilanes.

35. A method as claimed in claim 32 wherein there is added to said composition from 0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes.

36. A method as claimed in claim 32 wherein there is present from 1 to 200 parts of solvent.

37. A method as claimed in claim 33 wherein there is added to said composition:

1 to 40 parts by weight of a compound selected from the group consisting of ketones, aldehydes, carboxylic acids and alkylacetoxysilanes;

0.1 to 20 parts by weight of a silane selected from the group consisting of epoxyfunctional silanes and acrylofunctional silanes; and

1 to 200 parts of solvent.

38. The laminate produced by the method of claim 19.

39. The laminate produced by the method of claim 20.

40. The laminate produced by the method of claim 21.

41. The laminate produced by the method of claim 22.

42. The laminate produced by the method of claim 23.

43. The laminate produced by the method of claim 24.

44. The laminate produced by the method of claim 25.

45. The laminate produced by the method of claim 26.

46. The laminate produced by the method of claim 27.

47. The laminate produced by the method of claim 28.

48. The laminate produced by the method of claim 29.

49. The laminate produced by the method of claim 30.

50. The laminate produced by the method of claim 31.

51. The laminate produced by the method of claim 32.

52. The laminate produced by the method of claim 33.

53. The laminate produced by the method of claim 34.

54. The laminate produced by the method of claim 35.

55. The laminate produced by the method of claim 36.

56. The laminate produced by the method of claim 37.