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| There is a major market for siloxane surfactants for polyurethane foams. Siloxanes give lower surface tension than typical surfactants which use hydrocarbon hydrophobes. The typical siloxane surfactant for polyurethane foams is a nonionic block copolymer of a methyl siloxane and polyethylene glycol. Surfactants used with isocyanates are end capped and do not have any hydroxyl end groups. Silicone surfactants have shown to be a major contributor to fogging in car seating. Non-silicone surfactants based on butylene oxide-ethylene oxide block polymer have found a market in low fogging foams. The addition of surfactants to both the polyol and the isocyanate has shown to improve the cell structure in MDI foams. | |||||||||||||||
Chemical Name Composition |
CAS# | Function |
Reference | ||||||||||||
Silicone surfactants |
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| Siloxanes and Silicones, di-Me, 3-hydroxypropyl Me, ethoxylated propoxylated | 68937-55-3 | Surfactant for polyol | Reactive | ||||||||||||
| Siloxanes and Silicones, di-Me, 3-hydroxypropyl Me, ethers with polyethylene-polypropylene glycol mono-Me ether | 67762-85-0 | Surfactant for isocyanate | Non
reactive Silwet L 7001 Silwet L 7605 Tegopren 5878 |
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| Polyoxyalkylene siloxanes and silicones | 87244-72-2 | ||||||||||||||
| Glycols, polyethylene, methyl 3-[1,3,3,3-tetramethyl-1-(trimethylsiloxy)disiloxanyl]propyl ether | 27306-78-1 | Silwet L-77 | |||||||||||||
| Poly(oxy-1,2-ethanediyl), a-acetyl-w-[3-[1,3,3,3-tetramethyl-1-[(trimethylsilyl)oxy]disiloxanyl]propoxy]- | 125997-17-3 | Silwet Y 12808 | |||||||||||||
| Siloxanes and silicones, dimethyl, 3-hydroxypropyl methyl, ethoxylated | 68937-54-2 | Silwet FZ 2171 | |||||||||||||
| 3-(Polyoxyethylene)propylheptamethyltrisiloxane | 67674-67-3 | Dow Corning 5212 Silwet 408 |
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| Di-Me siloxanes, hydroxy-terminated, ethoxylated | 63148-55-0 | Dow Corning 4-3667 Silicone DC 470A | |||||||||||||
Nonsilicone surfactant |
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| Butylene oxide propylene oxide block copolymer | 27637-03-2 27517-34-6 | Surfactant for polyol | US5,674,918 US5,600,019 | ||||||||||||
| Alcohols, C9-11-branched and linear, ethers with ethyloxirane-oxirane polymer mono-Me ether | 111163-38-3 |
Surfactant for isocyanate |
Capped | ||||||||||||
| 1,2-Butylene oxide-ethylene oxide copolymer ether with dodecyl alcohol | 39454-63-2 | Surfactant for polyol | |||||||||||||
| Allyloxypolyethyleneglycol methyl ether | 27252-80-8 | Additive to surfactants | |||||||||||||
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