摘要:
Presently described are methods of making coating comprising aqueous fluoropolymer latex dispersions, aqueous fluoropolymer coating compositions, coated substrates, and (e.g. backside) films of photovoltaic cells. In one embodiment, the film comprises at least one fluoropolymer comprising repeat units derived from VF, VDF, or a combination thereof; inorganic oxide nanoparticles; and a compound that reacts with the repeat units derived from VF and VDF to crosslink the fluoropolymer and/or couple the fluoropolymer to the inorganic oxide nanoparticles. In another embodiment, the backside film comprises at least one fluoropolymer comprising repeat units derived from VF, VDF, or a combination thereof; and an amino-substituted organosilane ester or ester equivalent crosslinking compound.
摘要:
Method of making fluoropolymers by emulsion polymerization of one or more fluorinated monomers in an aqueous phase in the presence of a fluorinated emulsifier, said method comprises adding a doping agent in a weight ratio with respect to the emulsifier of from about 1:2 to about 1:20, said doping agent has a melting point of equal or less than 30° C. and a boiling point of at least about 100° C. and is selected from the group consisting of fluorinated cyclic hydrocarbons, fluorinated polyoxyalkenes, fluorinated alkenes and fluorinated polyoxyalkenes.
摘要:
The invention relates to a method of preparation for polymers, particularly binders for powder coatings and powder coatings which are prepared as a solution in a supercritical fluid phase. Binders for powder coatings are prepared from at least two ethylenically unsaturated monomers capable of free-radical or ionic copolymerization, and conventional initiators and regulators in supercritical fluids, whereby polymerization is carried out in the homogeneous phase, and, after the reaction has ended, either the composition or the phase parameters of the mixture are altered so that at least two phases with supercritical fluid are obtained, and the phase containing predominantly polymer is separated and the polymer is separated as a powder from the sc fluid by depressurization or the polymer phase is further processed under supercritical phase conditions to the powder coating.
摘要:
Described herein is a composition comprising an aqueous polymerization reaction product of fluorinated monomers and wherein the polymerization is initiated (i) in the absence of a fluorinated emulsifier and whereby no fluorinated emulsifier is added during polymerization or (ii) in the presence of an fluorinated emulsifier selected from: [Rf—O-L-COO-]i Xi+ (I) wherein L represents a linear or branched, non-fluorinated, partially fluorinated, or fully fluorinated alkylene group, Rf represents a linear or branched partially or fully fluorinated aliphatic group or a linear or branched partially or fully fluorinated aliphatic group interrupted with at least one oxygen atom, Xi+ represents a cation having the valence i and i is 1, 2 or 3; wherein the reaction product and/or the resulting aqueous phase are substantially free of di- and tri-alkylamines and substantially free of low molecular weight fluoroorganic compounds and methods thereof.
摘要翻译:本文描述的是包含氟化单体的水性聚合反应产物的组合物,其中聚合反应开始于(i)在不存在氟化乳化剂的情况下,并且由此在聚合过程中不加入氟化乳化剂,或(ii)在氟化乳化剂存在下 选自:[Rf-OL-COO-] i Xi +(I)其中L表示直链或支链,非氟化,部分氟化或完全氟化的亚烷基,Rf表示直链或支链部分或完全氟化的脂族基团或 间隔有至少一个氧原子的直链或支链部分或完全氟化的脂肪族基团,X i +表示i为i且i为1,2或3的阳离子; 其中所述反应产物和/或所得水相基本上不含二烷基胺和三烷基胺,并且基本上不含低分子量氟代有机化合物及其方法。
摘要:
Described herein is a composition comprising an aqueous polymerization reaction product of fluorinated monomers and wherein the polymerization is initiated (i) in the absence of a fluorinated emulsifier and whereby no fluorinated emulsifier is added during polymerization or (ii) in the presence of an fluorinated emulsifier selected from: [Rf—O-L-COO-]i Xi+ (I) wherein L represents a linear or branched, non-fluorinated, partially fluorinated, or fully fluorinated alkylene group, Rf represents a linear or branched partially or fully fluorinated aliphatic group or a linear or branched partially or fully fluorinated aliphatic group interrupted with at least one oxygen atom, Xi+ represents a cation having the valence i and i is 1, 2 or 3; wherein the reaction product and/or the resulting aqueous phase are substantially free of di- and tri-alkylamines and substantially free of low molecular weight fluoroorganic compounds and methods thereof.
摘要翻译:本文描述的是包含氟化单体的水性聚合反应产物的组合物,其中聚合反应开始于(i)在不存在氟化乳化剂的情况下,并且由此在聚合过程中不加入氟化乳化剂,或(ii)在氟化乳化剂存在下 选自:[Rf-OL-COO-] i Xi +(I)其中L表示直链或支链,非氟化,部分氟化或完全氟化的亚烷基,Rf表示直链或支链部分或完全氟化的脂族基团或 间隔有至少一个氧原子的直链或支链部分或完全氟化的脂肪族基团,X i +表示i为i且i为1,2或3的阳离子; 其中所述反应产物和/或所得水相基本上不含二烷基胺和三烷基胺,并且基本上不含低分子量氟代有机化合物及其方法。
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:
Method of making fluoropolymers by emulsion polymerization of one or more fluorinated monomers in an aqueous phase in the presence of a fluorinated emulsifier, said method comprises adding a doping agent in a weight ratio with respect to the emulsifier of from about 1:2 to about 1:20, said doping agent has a melting point of equal or less than 30° C. and a boiling point of at least about 100° C. and is selected from the group consisting of fluorinated cyclic hydrocarbons, fluorinated polyoxyalkenes, fluorinated alkenes and fluorinated polyoxyalkenes.
摘要:
A press-in contact and a press-in tool for connecting an electronic component to a printed circuit board, the press-in contact of the electronic component being pressed into a contact opening of the printed circuit board by the press-in tool. Also a method for producing a press-in contact. The press-in contact includes at least one guide region which can be received in a guide contour of the press-in tool in a position-fixing manner. The maximum length of the guide region is a multiple of the maximum width or is substantially equal to or only slightly shorter than the maximum width and/or the guide region is highly rigid in the press-in direction (z direction) and flexible in the other directions (x/y directions). The method according to the invention is characterized in that contiguous, interlinked contours of the press-in contacts, which contours are produced as a ribbon or band, are supplied to a separating station and are separated at predetermined separation points into individual press-in contacts.