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.
Abstract:
Methods are provided for decreasing aldehyde content in polyolefin materials comprising combining with the polyolefin material an organic additive compound which reacts with aldehydes to form water and a resulting organic compound. The organic additive compound comprises at least two hydrogen-substituted heteroatoms bonded to carbons of the organic additive compound such that the organic additive compound is reactive with aldehydes present in the polyolefin to form water and the resulting organic compound, which comprises an unbridged five- or six-member ring including the at least two heteroatoms. The resulting organic compound advantageously neither imparts an off-taste to food and beverage products in contact with the polyolefin nor discolors the polyolefin. Preferred polyolefins include polypropylene and polyethylene.
Abstract:
Disclosed is a composition comprising(A) from 99.9 to 60 weight percent, based on the weight of the composition, of a copoly(arylene sulfide) and(B) from 0.1 to 40 weight percent, based on the weight of the composition, of an ethylene-propylene rubber.
Abstract:
A copoly(arylene sulfide) corresponding to the structure ##STR1## wherein A is a divalent substituted or unsubstituted aromatic radical, T is a monovalent aromatic radical, x is n the range of 0.5 t 0.001 and n is at least 100.