摘要:
An electret is described that includes a surface modified polymeric article having surface fluorination produced by fluorinating the polymeric article.
摘要:
A fluorochemical composition is described comprising a polymer derived from a fluorochemical urethane (meth)acrylate monomer. The fluorochemical composition is useful for imparting stain release properties to a substrate.
摘要:
The thermally stimulated discharge current of an electret article can be used to identify electret articles that exhibit superior filtration properties. Electret filters that exhibit superior properties not achieved in similarly constructed filters contain fibers that are made from a blend of a polymer and a performance-enhancing additive. The electret filters exhibit an initial detectable DOP penetration of less than 5% and an average Min@Chl of greater than 200 mg DOP as measured by DOP Filter Web Loading Test Procedure 1. These new electrets are particularly useful in a respirator.
摘要:
Substrates which have been provided with an oil-, water- and soil-repellant treatment from the group consisting of naturally occurring and synthetic textiles and their mixtures, leather, mineral substances, thermoplastic and thermosetting polymers and paper, comprise fluorine-containing compositions which comprise two components A and B. Component A is a fluorine-containing acrylic copolymer with the following comonomers: a) (meth)acrylates containing perfluoroalkyl groups C.sub.n F.sub.2n+1 --X--O--CO--CR.sup.1 .dbd.CH.sub.2 (I), b) monomers from the group consisting of styrene, acrylonitrile, vinyl acetate, vinyl propionate and monomers, CH.sub.2 .dbd.CR.sup.4 --CO----OR.sup.5 (II), c) monomers ##STR1## and d) monomers CH.sub.2 .dbd.CR.sup.11 COO--CH.sub.2 CH.sub.2 N(R.sup.9, R.sup.10) (IVa) or in quaternized form �CH.sub.2 .dbd.CR.sup.11 --COO--CH.sub.2 CH.sub.2 N(R.sup.9 R.sup.10 R.sup.12)!.sup..sym. Y.sup..crclbar. (IVb) or in N-oxidized form ##STR2## or of the formula CH.sub.2 .dbd.CR.sup.13 --COO.sup..sym. Z.sup..crclbar. (V) Component B is a fluorine-free poly(meth)acrylate of comonomers CH.sub.2 .dbd.CHR.sup.14 --COO--R.sup.15 (VI) 0 to 20% by weight of comonomer (VI) can be replaced by comonomers from the group consisting of vinyl acetate, styrene, acrylonitrile, hydroxyethyl (meth)- acrylate, hydroxypropyl (meth)acrylate, glycidyl (meth)acrylate, (meth)acrylamide, N-methylol-(meth)acrylamide and N-methoxymethylol(meth)acrylamide. The weight ratio of A to B is 1:25 to 10:1. Substituents and indices are mentioned in the description.
摘要:
An electret filter media includes an additive or mixtures thereof that enhance the charge stability of the media. The filter media achieves acceptable alpha values for a range of filtration challenges without significant decay in alpha values over time. Preferred charge additives include fatty acid amides, oleophobic fluorochemical surfactants, and mixtures thereof.
摘要:
Perfluoro compounds containing dichloro phosphoryl and/or dichlorophosphoryl radicals are provided which are obtained by reacting perfluoroalkylalkenes with phosphorus trichloride in the presence of oxygen. The compounds are useful to obtain oleophobic finishes on various substrates, especially on fibrous materials.
摘要:
SUBSTRATES, PARTICULARLY TEXTILES, ARE RENDERED SOIL, OIL AND WATER REPELLENT BY THE APPLICATION THERETO OF COMPOSITIONS COMPRISING POLYMERS OF N-(PERFLUOROALKANOYL) AMINOETHYL ACRYLATE OR N-(PERFLUOROALKANOVL)-N-LOWER ALKYL-AMINOETHYL ACRYLATES.