N-halaminehydantoinyl epoxide compounds which can be used for the construction of coatings and materials which can be rendered biocidal by exposure to halogen solutions either before or after curing the coating or material are disclosed. The biocidal coatings and materials can then be used to inactivate pathogenic microorganisms such as bacteria, fungi, and yeasts, as well as virus particles, which can cause infectious diseases, and those microorganisms which cause noxious odors and unpleasant coloring such as mildew. The coatings are compatible with a variety of substrates including, but not limited to, cellulose, chitin, chitosan, synthetic fibers, cement grout, latex caulk, acrylic films, polyurethanes, plastics and paints.
Influence of aromatic rings topology on 5-HT7/5-HT1Aactivity, for novel hydantoin derivatives, was examined.
芳香环拓扑结构对新型咪唑啉衍生物的5-HT7/5-HT1A活性的影响进行了研究。
Alkylthioalkanoyloxyalkyl and alkylthioalkyl substituted bis-hydantoin
申请人:Ciba-Geigy Corporation
公开号:US04125516A1
公开(公告)日:1978-11-14
Alkylthioalkanoyloxyalkyl and alkylthioalkyl derivatives of N-heterocyclic moieties are stabilizers for organic materials subject to oxidative, thermal and/or light induced deterioration. They are prepared by classical transesterification, oxirane ring opening and addition of mercaptan to olefin reactions. Typical embodiments are tris[2-(3-n-dodecythiopropionyloxy)ethyl isocyanurate] and 3-(3-n-dodecylthio-2-hydroxypropyl)-5,5-dimethylhydantoin. These compounds are used in conjunction with phenolic antioxidants to stabilize organic materials, particularly polyolefins and hydrocarbon compositions, against the deleterious effects of heat and oxygen and against discoloration.
BINDER COMPOSITION, REINFORCING-FIBER BASE MATERIAL, PREFORM, FIBER-REINFORCED COMPOSITE MATERIAL, AND MANUFACTURING METHOD THEREFOR
申请人:Toray Industries, Inc.
公开号:EP2479217A1
公开(公告)日:2012-07-25
A binder composition comprising [A] an amorphous polyamide with a glass transition temperature of 140°C or higher having a dicyclohexylmethane skeleton in the molecule and [B] a sulfonamide compound is used to provide a binder composition, a reinforcing-fiber base material and a preform respectively most suitable for RTM, which respectively exhibit excellent impact resistance and physical properties remaining stable over the variations of molding conditions and can be used for producing a fiber-reinforced composite material most suitable for members such as primary structures of aircraft.
The inherent antimicrobial properties and biodegradability of chitosan make it an ideal candidate for antimicrobial materials. In this study, N-halamine precursor 3-glycidyl-5,5-dimethylhydantoin (GH) was synthesized and bonded onto chitosan by a ring opening reaction between chitosan and GH. The chitosan film modified with the N-halamine precursor could be rendered biocidal after exposure to a dilute household bleach solution. Syntheses routes, characterization data, and antimicrobial test results are presented. The chlorinated films with 2.60 x 10(18) atoms/cm(2) of active chlorine were challenged with Staphylococcus aureus (ATCC 6538) and Escherichia con O157:H7 (ATCC 43895) and showed good efficacy against these two bacterial species with log reductions of 7.4 and 7.5 within 10 and 5 min of contact time, respectively. These films may serve as potential materials for food packaging and biomedical applications. (C) 2012 Elsevier Ltd. All rights reserved.