摘要:
Disclosed are filter elements constructed of a filter support material coated with an acetoacetate-functional polymeric composition that reacts with and removes aldehydes, especially formaldehyde, present in gases such as air. Also disclosed are methods for the removal of aldehydes utilizing the coated filter support materials.
摘要:
Disclosed are materials and compositions effective for the selective removal of gaseous aldehydes from tobacco smoke. The materials and compositions comprise tobacco smoke filters comprising a fibrous material or fibers of a polymeric material containing covalently-bonded acetoacetoxy residues. The fibrous material or fibers are capable of reacting with and removing aldehydes present in tobacco smoke. Also disclosed are processes for the preparation of fibrous materials and fibers of a polymeric material containing covalently-bonded acetoacetoxy residues and methods for the removal of a gaseous aldehyde from tobacco smoke by contacting tobacco smoke with the aforesaid fibrous materials or fibers containing covalently-bonded acetoacetoxy residues.
摘要:
Disclosed are filter materials which are effective for the selective removal of gaseous aldehydes from a cigarette smoke stream. The filter materials comprise a tobacco smoke filter comprising a filter support material and an alkyl acetoacetate that is capable of reacting with and removing aldehydes present in tobacco smoke. Also disclosed are a method of removing gaseous aldehydes from tobacco smoke by contacting tobacco smoke with a filter comprising a filter support material and an alkyl acetoacetate and a smoking article such as a cigarette comprising the tobacco smoke filter described herein.
摘要:
A low VOC coating additive employing a water-dispersible rosin, a high glass transition temperature water-dispersible polymer, and optionally an amphiphilic component. The additive can be added to a coating to improve the performance characteristics of the coating, such as wiped wet edge time, open time, block resistance, gloss, scrub resistance, tack-free time, dry-to-touch time, and yellowing.
摘要:
Aqueous latex polymer dispersion compositions are disclosed characterized by their small particle size. The compositions are prepared by emulsion polymerization of one or more ethylenically unsaturated monomer in the presence of an alkyd seed containing sulfonate groups. Coatings based on these latex dispersions have improved advantages in film forming, gloss, hardness, low residual monomer content, less yellowing, and low VOC. The latex dispersions, having average particle sizes of 60-140 nm, are prepared by using a small ratio (i.e. about 2-15 wt. %) of an aqueous alkyd dispersion as the seed for latex particle growth. The waterborne alkyds are based on 5-sodiosulfo-isophthalic acid and either unsaturated or saturated fatty acids. The latex polymer dispersions thus obtained have improved film forming properties as well as low residual monomer content. The latexes are capable of forming clear, hard films at room temperature in the absence of external coalescents. Moreover, the resultant films are essentially non-yellowing. Thus, the latexes of this invention could be formulated into zero- or low-VOC paints for a variety of coating applications.
摘要:
The invention relates to resin intermediates and their preparation. The invention also relates to hydroxyl-functional, water-dispersible polymers formed from the intermediates and compositions containing the water-dispersible polymers. A preferred composition of the invention is a zero volatile organic content (VOC), ambient-cure enamel composition which contains a hydroxyl-functional, water-dispersible polyester.
摘要:
An ambient oxidative cure composition based on an acrylate functionalized alkyd resin is described. A method of preparing an ambient oxidative cure composition based on an acrylate functionalized alkyd resin is also described. Such ambient oxidative cure compositions may be used in, for example, fast drying, high solid paint or enamel compositions or formulations.
摘要:
The present invention describes the preparation of multifunctional imine-esters and their application as novel crosslinkers for surface coatings. The imine-esters are prepared by reacting a di- or tri-aldehyde with an &agr;-aminoester such as glycine ethyl ester hydrochloride. These novel crosslinkers may then be formulated with polyesters containing maleic anhydride residues to give enamel coating formulations. The enamels may be cured by a 1,3-dipolar cycloaddition mechanism to give carbon-carbon bonds and cyclic structure. Coatings thus prepared have advantages of low toxicity, no formaldehyde evolution, and improved performance.
摘要:
The invention relates to resin intermediates and their preparation. The invention also relates to hydroxyl-functional, water-dispersible polymers formed from the intermediates and compositions containing the water-dispersible polymers. A preferred composition of the invention is a zero volatile organic content (VOC), ambient-cure enamel composition which contains a hydroxyl-functional, water-dispersible polyester.
摘要:
A water-based latex of an acrylic-modified waterborne alkyd dispersion in water is described. The acrylic-modified waterborne alkyd is a hybrid resin prepared by the polymerization of at least one ethylenically unsaturated monomer in the presence of a waterborne alkyd having at least one pendant sulfonate functionality. The ethylenically unsaturated monomer may also be a latent oxidatively functional (LOF) acrylic monomer. Preparation of the latexes may be achieved by emulsion polymerization of at least one ethylenically unsaturated monomer in the presence of a waterborne alkyd having at least one pendant sulfonate functionality. Preparation of hybrid latexes which contain latent oxidative functional (LOF) acrylic monomers may also be achieved by emulsion polymerization of at least one LOF acrylic monomer in the presence of a waterborne alkyd having at least one pendant sulfonate functionality whereby the latent oxidative functionality of the acrylic polymer survives polymerization. Such acrylic-modified waterborne alkyds are useful in a variety of coating compositions.