摘要:
A composition including at least one first divalent unit represented by formula: Each Rf is independently selected from the group consisting of Rfa—(O)t—CHF—(CF2)n—; [Rfa—(O)t—C(L)H—CF2—O]m—W—; Rfb-O—(CF2)p-; F(CkF2k)—(O—CkF2k)P—O—CF2—; and CF3—O—(CF2)3—(OCF(CF3)—CF2)Z—O-L1-. Each Q is independently selected from the group consisting of a bond, —C(O)—N(R1)—, and —C(O)—O—. Each X is independently selected from the group consisting of alkylene and arylalkylene, wherein alkylene and arylalkylene are each optionally interrupted by at least one ether linkage and optionally terminated by —N(R1)—C(O)— or —O—C(O)—. R and R1 are each independently selected from the group consisting of hydrogen and alkyl having from 1 to 4 carbon atoms. Rfa represents a partially or fully fluorinated alkyl group having from 1 to 10 carbon atoms and optionally interrupted with at least one oxygen atom. Rfb is selected from the group consisting of CF3CFH— and F(CjF2j)-. Methods of reducing surface tension of a liquid, making foams, and treating a surface using the compositions are also disclosed.
摘要:
A process of removing fluorinated compounds from an aqueous phase originating from the preparation of fluoropolymers said process comprising the use of polycationic polymers.
摘要:
Compounds represented by formula (Rf-Q-X)s—Z. Each Rf is independently a partially fluorinated or fully fluorinated group selected from Rfa-(O)r—CHF—(CF2)n—; [Rfb-(O)tC(L)H—CF2—O]m—W—; CF3CFH—O—(CF2)p—; CF3—(O—CF2)z—; and CF3—O—(CF2)3—O—CF2—. Methods of reducing surface tension of a liquid, making foams, and treating a surface using the compounds are also disclosed.
摘要:
Compounds represented by formula (Rf-Q-X)s—Z. Each Rf is independently a partially fluorinated or fully fluorinated group selected from Rfa-(O)r—CHF—(CF2)n—; [Rfb-(O)tC(L)H—CF2—O]m—W—; CF3CFH—O—(CF2)p—; CF3—(O—CF2)z—; and CF3—O—(CF2)3—O—CF2—. Methods of reducing surface tension of a liquid, making foams, and treating a surface using the compounds are also disclosed.
摘要:
Fluorinated compounds represented by formula Rf-Q-X—[Si(R)f(R1)3-f]g. Each Rf is independently a partially fluorinated or fully fluorinated group selected from Rfa-(O)r-CHF—(CF2)n-; [Rfb-(O)t-C(L)H—CF2—O]m-W—; CF3CFH—O—(CF2)p-; CF3—(O—CF2)z-; and CF3—O—(CF2)3—O—CF2—. Methods of treating a surface or a hydrocarbon-bearing formation using the fluorinated compounds and treated articles and treated hydrocarbon-bearing formations are also disclosed.
摘要:
The present invention provides a method of making a fluoropolymer comprising polymerizing one or more fluorinated monomers in an aqueous emulsion polymerization in the presence of a fluorinated surfactant selected from fluorinated surfactants of formula (I): [RfO-L-CO2−]iXi+ (I) wherein Rf is selected from a partially fluorinated alkyl group, a fully fluorinated alkyl group, a partially fluorinated alkyl group that is interrupted with one or more oxygen atoms, and a fully fluorinated alkyl group that is interrupted with one or more oxygen atoms; L is selected from a partially fluorinated alkylene group, a fully fluorinated alkylene group, a partially fluorinated alkylene group that is interrupted with one or more oxygen atoms, and a fully fluorinated alkylene group that is interrupted with one or more oxygen atoms; Xi+ represents a cation having the valence i; and i is 1, 2, or 3; further wherein at least part of the fluorinated surfactant is added to the aqueous phase as an aqueous mixture with at least one fluorinated liquid, and further wherein when the fluorinated surfactant is a perfluorinated polyethercarboxylic acid, the fluorinated liquid is not a perfluoropolyether.
摘要:
A composition including at least one first divalent unit represented by formula: Each Rf is independently selected from the group consisting of Rfa—(O)t—CHF—(CF2)n—; [Rfa—(O)t—C(L)H—CF2—O]m—W—; Rfb-O—(CF2)p-; F(CkF2k)—(O—CkF2k)P—O—CF2—; and CF3—O—(CF2)3—(OCF(CF3)—CF2)Z—O-L1-. Each Q is independently selected from the group consisting of a bond, —C(O)—N(R1)—, and —C(O)—O—. Each X is independently selected from the group consisting of alkylene and arylalkylene, wherein alkylene and arylalkylene are each optionally interrupted by at least one ether linkage and optionally terminated by —N(R1)—C(O)— or —O—C(O)—. R and R1 are each independently selected from the group consisting of hydrogen and alkyl having from 1 to 4 carbon atoms. Rfa represents a partially or fully fluorinated alkyl group having from 1 to 10 carbon atoms and optionally interrupted with at least one oxygen atom. Rfb is selected from the group consisting of CF3CFH— and F(CjF2j)-. Methods of reducing surface tension of a liquid, making foams, and treating a surface using the compositions are also disclosed.
摘要:
There is provided a fluoroelastomer characterized by containing one type or more types of fluorinated emulsifiers represented by the formula: F—(CF2)t-[O(CF2)n]m-O—(CHF)o-(CF2)p-X where m=0 to 3; n=1 to 5; o=0 to 1; p=1 to 3; t=1 to 10; and where when t=2 than o≠0; and further where X is selected from a group consisting of a carboxyl acid group and a salt of a carboxylic acid group. A method for preparing fluoroelastomers by using such fluorinated emulsifiers in emulsion polymerization of fluoromonomers and articles containing such fluoroelastomers are also provided. A fluorinated elastomer dispersion including an aqueous mixture of a crosslinkable fluorinated elastomer and such fluorinated emulsifiers are also provided. The fluoroelastomers created with such fluorinated emulsifiers are essentially free of cations other than NH4+ and H+ and have a low glass transition temperature.
摘要翻译:提供一种含氟弹性体,其特征在于含有一种或多种由式F-(CF 2)t- [O(CF 2)n] m O - (CHF)o - (CF 2)p X表示的氟化乳化剂,其中m = 0 到3; n = 1〜5; o = 0至1; p = 1〜3; t = 1〜10; 并且当t = 2时,o <0; 并且进一步其中X选自羧酸基团和羧酸基团的盐。 还提供了通过使用这种氟化乳化剂在含氟单体和含有这些含氟弹性体的制品的乳液聚合中制备含氟弹性体的方法。 还提供了包含可交联氟化弹性体和这种氟化乳化剂的水性混合物的含氟弹性体分散体。 用这种氟化乳化剂生产的含氟弹性体基本上不含NH 4+和H +以外的阳离子,并具有低的玻璃化转变温度。
摘要:
There is provided a fluoroelastomer characterized by containing one type or more types of fluorinated emulsifiers represented by the formula: F—(CF2)t-[O(CF2)n]m-O—(CHF)o-(CF2)p-X where m=0 to 3; n=1 to 5; o=0 to 1; p=1 to 3; t=1 to 10; and where when t=2 than o≠0; and further where X is selected from a group consisting of a carboxyl acid group and a salt of a carboxylic acid group. A method for preparing fluoroelastomers by using such fluorinated emulsifiers in emulsion polymerization of fluoromonomers and articles containing such fluoroelastomers are also provided. A fluorinated elastomer dispersion including an aqueous mixture of a crosslinkable fluorinated elastomer and such fluorinated emulsifiers are also provided. The fluoroelastomers created with such fluorinated emulsifiers are essentially free of cations other than NH4+ and H+ and have a low glass transition temperature.
摘要翻译:提供一种含氟弹性体,其特征在于含有一种或多种由式F-(CF 2)t- [O(CF 2)n] m O - (CHF)o - (CF 2)p X表示的氟化乳化剂,其中m = 0 到3; n = 1〜5; o = 0至1; p = 1〜3; t = 1〜10; 其中当t = 2时,o≠0; 并且进一步其中X选自羧酸基团和羧酸基团的盐。 还提供了通过使用这种氟化乳化剂在含氟单体和含有这些含氟弹性体的制品的乳液聚合中制备含氟弹性体的方法。 还提供了包含可交联氟化弹性体和这种氟化乳化剂的水性混合物的含氟弹性体分散体。 用这种氟化乳化剂生产的含氟弹性体基本上不含NH 4+和H +以外的阳离子,并具有低的玻璃化转变温度。