Moisture crosslinkable polymeric composition containing special antioxidants
A cross-linking polymerization and anti-oxidant technology, applied in the direction of coating, etc., can solve the problems of voids or surfaces, flammability, and affecting stretchable properties
Inactive Publication Date: 2008-08-13
UNION CARBIDE CHEM & PLASTICS TECH CORP
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AI Technical Summary
Problems solved by technology
Some of the released gases or reaction products have a strong odor and are flammable, and / or negatively affect the stretchability properties of heat-aged articles produced from the polymeric composition
The gas generated can also cause voids or surface blemishes on articles produced from wet crosslinkable polymeric compositions
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0027] The following non-limiting examples illustrate the invention.
[0028] Lower Explosive Limit (LEL) for 50 g sample
[0029] Three samples of the invention were evaluated against 6 comparative examples. All exemplary polymeric compositions were prepared in 50 gram weights and used 46.33 wt% AMPLIFY EA100 TM Ethylene ethyl acrylate copolymer, 46.33 wt% linear low density polyethylene ("LLDPE"), 4% NACURE TM B201 alkyl aryl sulfonic acid and 3.34 wt% antioxidants evaluated.
[0030] AMPLIFY EA100 TM Ethylene ethyl acrylate copolymer was purchased from the Dow Chemical Company, had a melt index of 1.5 g / 10 minutes, and had an ethyl acrylate concentration of 15 wt%. LLDPE is a copolymer of 1-butene and ethylene, with a melt index of 0.7 g / 10 minutes and a density of 0.92 g / cubic centimeter. NACURE TM B201 alkylarylsulfonic acid was purchased from King Industries, Inc.
[0031] For each exemplary polymeric composition, 50 grams of the composition were placed in a seale...
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Abstract
The present invention is a moisture-crosslinkable polymeric composition comprising (a) a silane-functionalized olefinic polymer, (b) an acidic silanol condensation catalyst, and (c) an antioxidant, not having a tertiary alkyl-substituted aryl or phenolic group, wherein the polymeric composition does not generate a high amount of foul-smelling or combustible gases. Alternatively, the antioxidant is substantially free of substituents vulnerable to dealkylation in the presence of the acidic silanol condensation catalyst and at conventional processing conditions. The invention also includes methods for preparing the moisture-crosslinkable polymeric composition. The moisture-crosslinkable polymeric compositions can be used as a coating and applied over a wire or a cable.
Description
[0001] This application is a divisional application of the Chinese patent application with the application number 200480017558.5, the application date is June 22, 2004, and the invention title is "wet crosslinkable polymer composition containing specific antioxidant". technical field [0002] The present invention relates to moisture-crosslinkable polymeric compositions that do not generate significant amounts of malodorous gases, flammable gases, or both. The polymer composition is suitable for wire and cable applications. Background technique [0003] The use of an acidic silanol condensation catalyst can improve the cure rate of the moisture crosslinkable polymeric composition. Unfortunately, certain acidic silanol condensation catalysts such as sulfoxide acidic catalysts are unstable at high temperature (>100 degrees Celsius) or cannot act as catalysts for selective reactions. As a result, under certain reaction conditions, these sulfoxide acids may evolve sulfoxide ...
Claims
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IPC IPC(8): C08L43/04C08L51/06C08L83/04C08K5/00C08F255/00C08F255/02C08L23/08C09D151/06
CPCC08K5/005C08K5/25C08K5/0025C08L2312/08C08L23/0815C08F255/00C08L51/06C09D151/06C08L83/04C08F255/02C08L43/04C08L2666/24C08L2666/14C08L2666/02
Inventor M·B·比斯科利奥K·T·德夫林M·埃塞格尔L·H·格罗斯D·L·小麦克丹尼尔S·F·舒罗特M·小科茨
Owner UNION CARBIDE CHEM & PLASTICS TECH CORP