Composite pressure container or tubular body and composite intermediate
View Patent ↗One embodiment of the present invention relates to a composite pressure container or tubular body, which includes: a prepreg tow winding obtained by a process that includes: contacting at least one fiber with an uncured thermosetting resin, to form a coated fiber; winding said coated fiber around an outer shell, form, liner, or mandrel; and curing the resin; wherein said uncured thermosetting resin includes at least one surface active oligomer or polymer.
1. A process for producing a prepreg tow, comprising:
contacting at least one reinforcing fiber tow with an aqueous emulsion comprising water, a thermosetting resin and a surface active agent, to form a coated fiber; and
vaporizing said water from said coated fiber, and
wherein the surface active agent is a reaction product of polyethylene glycol or polypropylene glycol and an epoxy resin and has molecular weight of at least 5000 and at most 30000, and wherein an amount of the surface active agent is 4% by weight to 10% by weight of an amount of thermosetting resin.
2. The process as claimed in claim 1 , wherein the water content of said emulsion is at most 90% by weight.
3. The process as claimed in claim 1 , wherein the water content of said emulsion is at most 20% by weight.
4. The process as claimed in claim 1 , wherein the viscosity of said emulsion in contact with the reinforcing fiber is 1 to 10,000 cps.
5. The process as claimed in claim 1 , wherein the water is vaporized by heating.
6. The process as claimed in claim 1 , wherein said contacting further comprises impregnating said fiber with said aqueous emulsion.
7. The process as claimed in claim 1 , wherein said fiber is selected from the group consisting of carbon fiber, oxidized fiber, graphite fiber, boron fiber, glass fiber, organic fiber, and combinations thereof.
8. The process as claimed in claim 1 , wherein the fiber comprises at least 500 filaments and at most 300,000 filaments.
9. The process as claimed in claim 1 , wherein the fiber is twisted.
10. The process as claimed in claim 1 , wherein the fiber is partially cut or is composed of cut filaments.
11. The process as claimed in claim 1 , wherein the thermosetting resin is an epoxy resin.
12. The process as claimed in claim 1 , wherein the aqueous emulsion comprises the surface active agent comprising a main chain which comprises at least one oxygen atom and a bisphenol skeleton, in an amount of at least 2 wt% based on a resin solid content.
13. The process as claimed in claim 12 , wherein the amount is at least 5 wt% based on a resin solid content.
14. The process of claim 1 , wherein the surface active agent is the reaction product of a polyethylene glycol and an epoxy resin comprising reacted units of a bis-phenol.
15. The process of claim 1 , wherein the fiber volume content of the prepreg tow is from 40 to 75%.
16. The process as claimed in claim 1 , wherein the surface active agent has a molecular weight of at least 10000 and at most 30000.
17. The process as claimed in claim 1 , wherein the surface active agent has a number average molecular weight of at least 12000 to at most 30000.
18. The process as claimed in claim 1 , wherein the prepreg tow comprises a plurality of unidirectionally oriented fibers.
19. The process as claimed in claim 18 , wherein the fibers are uncut.
20. A process for producing a prepreg tow, comprising:
producing at least one reinforcing fiber tow;
contacting the reinforcing fiber tow with an aqueous emulsion comprising water, a thermosetting resin, and a surface active agent, to form a coated fiber; and
vaporizing said water from said coated fiber, and
wherein the surface active agent is a reaction product of polyethylene glycol or polypropylene glycol and an epoxy resin and has molecular weight of at least 5000 and at most 30000, and wherein an amount of the surface active agent is 4% by weight to 10% by weight of an amount of thermosetting resin.
21. The process as claimed in claim 20 , wherein said fiber is selected from the group consisting of carbon fiber, oxidized fiber, graphite fiber, boron fiber, glass fiber, organic fiber, and combinations thereof.
22. The process as claimed in claim 20 , wherein the fiber comprises at least 500 filaments and at most 300,000 filaments.
23. The process as claimed in claim 20 , wherein the fiber is twisted.
24. The process as claimed in claim 20 , wherein the fiber is partially cut or is composed of cut filaments.
25. The process as claimed in claim 20 , wherein said contacting further comprises impregnating said fiber with said aqueous emulsion.
26. The process as claimed in claim 20 , wherein the thermosetting resin is an epoxy resin.
27. The process as claimed in claim 20 , wherein the aqueous emulsion further comprises the surface active agent comprising a main chain which comprises at least one oxygen atom and a bisphenol skeleton, in an amount of at least 2 wt% based on a resin solid content.
28. The process as claimed in claim 27 , wherein the amount is at least 5 wt% based on a resin solid content.
29. The process of claim 20 , wherein the fiber volume content of the prepreg tow is from 40 to 65%.
30. The process of claim 20 , wherein the surface active agent is the reaction product of a polyethylene glycol and an epoxy resin comprising reacted units of a bis-phenol.
31. The process of claim 20 , wherein the fiber volume content of the prepreg tow is from 40 to 75%.
32. The process as claimed in claim 20 , wherein the surface active agent has a molecular weight of at least 10000 and at most 30000.
33. The process as claimed in claim 20 , wherein the surface active agent has a number average molecular weight of at least 12000 to at most 30000.
34. The process as claimed in claim 20 , wherein the prepreg tow comprises a plurality of unidirectionally oriented fibers.
35. The process as claimed in claim 20 , wherein the fibers are uncut.