- Surfactant Aggregation Number and Polydispersity of SDS + 1-Pentanol Mixed Micelles in Brine Determined by Time-Resolved Fluorescence Quenching
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Size and polydispersity of sodium dodecyl sulfate (SDS) + 1-pentanol direct mixed micelles have been investigated by means of the time-resolved fluorescence quenching method in the system SDS/1-pentanol/water/NaCl ( = 0.0331 M, = 0.42 M, and = 6.5 g/L of water).This method reveals high polydispersity in micellar size.Several size distribution models have been tested.The one that best fits the data is a double Gaussian distribution which suggests that two populations of mixed micelles might be present in the solution, centered on the SDS mean aggregation numbers of 75 and 830.
- Lang, Jacques
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- AN IMPROVED PROCESS FOR PREPARATION OF QUATERNARY PYRIDINIUM SALTS
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The present invention discloses a process for the production of quaternary pyridinium salts and hydrates thereof. In this process, Cetylpyridinium chloride monohydrate with high purity and yield is obtained by reacting Cetyl chloride, pyridine, and water and Laurylpyridinium chloride monohydrate with high purity and yield is obtained by reacting Lauryl chloride, pyridine, and water. The process disclosed herein is simple, cost-effective and eco-friendly and produces quaternary pyridinium salts and hydrates thereof having high purity and yield at industrial scale.
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Page/Page column 11; 12
(2019/08/08)
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- AN IMPROVED PROCESS FOR THE PRODUCTION OF QUATERNARY PYRIDINIUM SALTS
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Disclosed herein is cost effective and eco-friendly process for producing quaternary pyridinium salts and their hydrates thereof, with high yield and purity at industrial scale.
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Page/Page column 8
(2016/06/28)
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- STABLE COMPOSITIONS OF THIABENDAZOLE AND IODINE-CONTAINING FUNGICIDES
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The present invention relates to stable compositions for the fungicidal equipment of thermoplastic polymers, in particular PVC, comprising thiabendazole, at least one iodine-containing fungicide and at least one epoxide and optionally further fungicidally active compounds, and also to methods for preparing these formulations and to uses thereof for the protection of thermoplastic polymers against attack and destruction by microorganisms. Moreover, the invention relates to mold-resistant PVC materials equipped with the compositions according to the invention.
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- FUNGICIDAL PENFLUFEN MIXTURES
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The invention relates to mixtures comprising penflufen, to the use of these mixtures for protecting industrial materials and to a method for treating industrial materials with the penflufen mixtures.
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- One-pot synthesis of cationic amphiphiles from n-alcohols and allyl alcohols
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A novel, efficient one-pot method has been developed to synthesize amphiphiles such as N-alkylated/N-allylated triethyl-amines and pyridinium salts for the first time from n-alcohols and naturally occurring terpenes (allyl alcohols) in good yields. These amphiphiles have got industrial application as surfactants, DNA carriers, and other biological applications. The DNA delivery efficacy and cytotoxicity of N-alkylated and N-allylated triethylamine and pyridinium salts were studied. Georg Thieme Verlag Stuttgart · New York.
- Narender, Tadigoppula,Madhur, Gaurav,Dharamsheela,Reddy, K. Papi,Sarkar,Sarkar,Tripathi
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supporting information; experimental part
p. 1687 - 1692
(2011/09/14)
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- Oral Moisturizer for Alleviating Dry Mouth
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An oral moisturizer is disclosed to provide relief from dry mouth. The moisturizer may be provided in different flavors that are palatable, with clinical benefits such as anti-nausea, appetite stimulant, etc., in addition to relief from the deteriorating dental effects of dry mouth. One disclosed oral moisturizer includes glycerin, xylitol, sodium hyaluronate, cetylpyridinium chloride, polysorbate surfactants and a palatable flavor.
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- Synergetic biocidal composition comprising 2-methylisothiazoline-3-on
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The invention relates to a biocidal composition which can be added to materials which can be attacked by harmful micro-organisms. The composition comprises 2-methylisothiazoline-3-on as biocidal active ingredient and at least one other biocidal active ingredient. The biocidal composition is characterised in that the composition contains formaldehyde or a formaldehyde-depot material, 2-brom-2-nitro-1,3 propandiol, polyhexamethylene biguanide, o-phenylphenol, pyrithione, n-butyl-1,2-benzisothiazoline-3-on, n-hydroxymenthyl-1,2-benzisothiazoline-3-on or benzalkonium chloride as said other biocidal active ingredient.
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- Synergistic biocide composition
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A biocide composition is provided as an addition to substances that can be infected by harmful microorganisms, in which the biocide composition has at least two active biocidal substances, one of which is 2-methylisothiazolin-3-one. The composition is characterized in that it contains 1,2-benzisothiazolin-3-one, compositions containing 5-chloro-2-methylisothiazolin-3-one being excluded. In comparison with its individual components, the composition of the invention has a synergistic biocidal activity.
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- Liquid-crystalline ionic liquids
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Low-melting point salts, the basis of industrially relevant ionic liquids, exhibit smectic A mesophases over extended temperature ranges.
- Bowlas, Christopher J.,Bruce, Duncan W.,Seddon, Kenneth R.
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p. 1625 - 1626
(2007/10/03)
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- Marine compositions bearing preferentially concentrated domains of non-tin, organo anti-fouling agents
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The present invention is addressed to a curable, marine anti-fouling composition of a thermoplastic or thermosetting binder, solvent, non-tin, organo antifouling agent, and optionally conventional additives, e.g. leaching agents, opacifying pigments, etc. The anti-fouling agents are found in preferentially-concentrated domains (hereinafter, often referred to as "PCD") in the cured compositions. The PCDs can be termed non-homogeneous, phase-separated, or incompatible in the system. The art term used in describing the PCDs of anti-fouling agent is not limitative of the invention as the disclosure herein will demonstate. Preferably, PCDs are created by forming an oligomeric adduct of the anti-fouling agent which adduct is formed into PCDs upon the curing of the composition. Additional techniques for forming PCDs of anti-fouling agent are revealed herein. The present invention also is addressed to new, low toxicity anti-fouling agents which comprise pesticide or herbicide compounds having a X factor of between about 0.01 and 3, a Z value for vinyl or aromatic compounds of between about 0.01 and 0.08, and an LD50 value of greater than 200 mg/kg against rats or mice. Such pesticide or algicide compounds broadly can be selected from heterocyclic compounds, aromatic compounds substituted with heteroatom substituents, various amino compounds, carbocyclic vinyl ether ketones, certain phospho compounds, certain polychlorinated carbocyclic and acyclic compounds, certain chlorinated carbocyclic carboxylates, antimony tartrate, boric acid, and cupric oleate. Exemplary aromatic compounds include diaromatic compounds linked with a sigma bond or with a carbon or heteroatom linkage, fused aromatic rings, and mono-aromatic compounds.
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- Liquid polymer composition, and method of use
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The invention relates methods for the treatment of gingivitis, oral plaque and oral or dermatological fungal infections by the administration of a liquid methacrylic acid copolymer composition that contains a release adjusting agent and a pharmacological agent. The composition forms a solid film upon drying, and is capable of accomplishing the sustained release of the pharmacological agent such as to permit its use in the treatment or prevention of dental or dermatological conditions.
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- Interaction of Methyl Orange with Submicellar Cationic Surfactants
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The interaction of aqueous Methyl Orange (MO), an azo dye, with alkyltrimethylammonium and N-hexadecylpyridinium halide surfactants in submicellar concentration ranges has been investigated.The interaction gives rise to a new absorption band of MO with a maximum at ca. 370 nm, and the appearance of the new band has been attributed to change in the chromophore microenvironment in water structure enforced closely packed ion pairs of the dye with submicellar cationic surfactant.The strength of the interaction depends on the alkyl chain length of the surfactant, the surfactant head group and the counter ions.
- Dutta, Robin K.,Bhat, Subray N.
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p. 2457 - 2460
(2007/10/02)
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- Liquid polymer composition, and method of use
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The invention relates to a liquid methacrylic acid copolymer composition that contains a release adjusting agent and a pharmacological agent. The composition forms a solid film upon drying, and is capable of accomplishing the sustained release of the pharmacological agent such as to permit its use in the treatment or prevention of dental or dermatological conditions.
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- Dentifrice containing a poly(hydroxypropyl ether) non-ionic surfactant and a specified cationic polymer
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Dentifrice containing, in combination, (A) a poly(hydroxypropyl ether) nonionic surfactant, and (B) a cationic polymer selected from the group consisting of (i) a vinylpyrrolidone/dialkylaminoalkyl or -hydroxyalkyl acrylate or methacrylate, quaternized or nonquaternized and (ii) a cationic polysaccharide. This dentifrice is characterized by good foamability, pleasant taste and it does not attack the buccal mucosae and the gums.
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- Organosilyl compounds and their use as fungicides
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Organosilyl compounds of the general formula I STR1 where R1, R2 and R3 are alkyl, substituted alkyl, alkenyl, alkynyl, cycloalkyl, phenyl or substituted aryl, R4 and R5 are alkyl or hydrogen and Y is CH2, oxygen, nitrogen or alkyl-substituted nitrogen, their salts and fungicides containing these compounds.
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