Bactericidal polyurethanes

A nonleaching biocidal polyurethane was developed through covalent bonding of biocides to bulk polymer, often on the chain extender. Cooper reported the synthesis 

Wynne et al. synthesized a polyurethane with soft blocks containing semifluo-rinated (—CH2OCH2CF3) and 5,5-dimethylhydantoin pendant groups as a biocidal 

Contact biocidal biomaterial surfaces kill bacteria on contact as the bactericidal agents are not released and are active following direct interaction with the bacterial cells. Acting through direct contact with bacteria, however, these bioactive surfaces can 

22 Silver- and metal-containing polyurethanes Metal- and silver ion-containing polyurethanes 

Chemical reduction is the most frequently applied method for the preparation of silver nanoparticles as stable, colloidal dispersions in water or organic solvents. However, a number of alternative green chemistry synthesis routes have been reported. Inspired by mussel adhesive proteins, a novel functional polyurethane based on hydrolyzable tannins that contain a number of catechol groups was 

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Discontinued applications. The use of phenylmercuric acetate as a fungicide in interior latex paints was banned in 1990 (Reese 1990), and its use in exterior paint was banned in 1991 (Hefflin et al. 1993). Both of these bans were prompted because of releases of mercury vapors as the paint degraded. Alkyl mercurial compounds were used until the mid-1970s as a treatment to disinfect grain seeds. Most other agricultural applications of mercury compounds in bactericides and fungicides have been banned due to the toxicity of mercury. Mercuric nitrate was used in the production of felt hats to hydrolyze rabbit fur. The use of mercury as a wood preservative has ceased due to the use of polyurethane (Drake 1981). 

SYNTHESIS OF METAL INCORPORATED LOW MOLECULAR WEIGHT POLYURETHANES FROM NOVEL AROMATIC DIOLS, THEIR CHARACTERIZATION AND BACTERICIDAL PROPERTIES... 

Acharya V, Ratna Prabha C, Narayanamurthy C. Synthesis of metal incorporated low molecular weight polyurethanes from novel aromatic diols, their characterization and bactericidal properties. Biomaterials 2004 25 4555-62. http //dx.doi.org/ 10.1016/j. biomaterials.2003.11.044. 

Other rosin derivatives expand the range of rosin markets. For example, the alcohol derivatives are used in plastic heat stabilizers, ethoxylated amines are used in corrosion prevention and specialty cleaning, and polyols are used for polyurethane foams. Amines (dehydroabietylamine) are used as antimicrobials (fungicides, bactericides, and algicides), as cationic ore flotation agents, and in the laboratory as a resolving agent for racemic mixtures. 

Far) IR spectra, assignment Use as cat. foaming polyurethan Use as bactericide, fungicide Use as cat. foaming polyurethan (1)... 

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