Claims
- 1. Fluorinated nonionic surfactant selected from the following classes:Rf—L—(OCH(R1)—CH(R2))n—O—A (I) wherein:n is an integer in the range 4-60; L is selected from: —(CF(Y)—CO—O)pR′—; —(CF(Y)—CO—NH)pR′—; —(CF(Y)—SO2—NH)pR′—; wherein: p=1; Y is F or —CF3; R′ is an alkylic radical C1-C5, linear or branched; R1, R2 are both H or the former H and the latter CH3, Rf is a radical of (per)fluoroalkane type from 4 to 20 C atoms or of (per)fluoropolyether type comprising repeating units randomly distributed along the polymer chain selected from: —CF(X)CF2O— or —CFXO—, wherein X is equal to F or —CF3; —CF2(CF2)zO— wherein z is an integer equal to 2 or 3; —CF2CF(ORf″)O— or —CF(ORf″)O— wherein Rf″ can be —CF3, —C2F5, or —C3F7; A is selected from the following ones: —H; —CH3—CH2OH; —CH2OCH2CH2OH; —CH2(OCH2CH2)n′″OR′ wherein n′″ is an integer between 2 and 15 and R′ is H, —CH3, —COOCH3; —CONHCH2CH2OH.
- 2. The fluorinated nonionic surfactant according to claim 1, wherein for:Rf—L—(OCH(R1)—CH(R2))n—O—A (I) n is an integer in the range 8-30.
Priority Claims (1)
Number |
Date |
Country |
Kind |
MI97 A 001767 |
Jul 1999 |
IT |
|
Parent Case Info
This is a Division of application Ser. No. 09/705,699 filed Nov. 6, 2000, now U.S. Pat. No. 6,277,906, which in turn is a Divisional Application of Parent Application Ser. No. 09/121,091, filed Jul. 23, 1998, now U.S. Pat. No. 6,174,979 B1. The disclosure of the prior applications is hereby incorporated by reference herein in its entirety.
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