Abstract:
A process comprising removing alkyl-substituted aromatic compounds, alkyl compounds, or cycloalkyl compounds from an aromatic stream containing these compounds by contacting the aromatic stream with molecular oxygen in the presence of a zeolite.
Abstract:
A method to render stone, ceramic, or cementitious structures water repellent is disclosed. The method includes the step of contacting the stone, ceramic, or cementitious structures with an alkylphosphonic acid. The alkylphosphonic acid can be dispersed in an aqueous medium and can be at least partially neutralized with ammonia, an amine, or a basic alkali salt.
Abstract:
A polymer additive for improving the reheat characteristics of a polymer or polymeric composition comprises an inorganic material which is such that a 2.5 mm thick polyethylene terephthalate plaque incorporating the inorganic material has, when tested, an absorption ratio of less than 0.9, wherein the absorption ratio is either the ratio of A1/A2 or the ratio A1/A3, wherein: A1 is the maximum absorption between 400 nm and 550 nm; A2 is the maximum absorption between 700 to 1100 nm; A3 is the maximum absorption between 700 to 1600 nm. Preferred inorganic materials are titanium nitride, indium tin oxide and lanthanum hexaboride.
Abstract:
Polymer compositions, for example of polyethyleneterephthalate bottles or preforms, include a reheat additive which has reducing transmission/increasing absorbance across the IR region as the wavelength increases. The reheat additive may be a titanium nitride, made by a plasma vapour deposition technique. Advantageously, the material may be used at a lower level than hitherto known materials or may be used at the same levels as hitherto but provide a greater reheat effect. Example 3a shown in the figure illustrates the absorbance of a preferred material.
Abstract:
Filters for removing particulate and gaseous organic and inorganic materials from a fluid stream are disclosed. The filter may contain a polymer matrix and optional sequestering agents. Methods of making the filters are also disclosed. Methods of using the filters to remove one or more materials from a fluid stream, such as an air stream, are also disclosed.
Abstract:
Compositions comprising a polymer and an exfoliated metal phosphonate are provided. Processes for making such polymer compositions and articles formed from such polymer compositions are also provided. Compositions according to the invention are useful in polymer applications in which barrier properties are of concern, such as in plastic food and beverage containers.
Abstract:
Methods to decrease aldehyde content of a polymer are provided. An effective amount of an additive that contains a P-H functionality is incorporated into the polymer in the presence of an acidic of basic catalyst compositions are also provided.
Abstract:
A polyester composition with reduced acetaldehyde concentration comprising polyester and at least one vinyl esterification catalyst. A method for making the polyester composition is also disclosed along with polyester articles made with the polyester composition. Suitable articles include containers such as bottles.