摘要:
The present invention relates to a cross-linkable, elastomeric silicone composition and to a method using the composition according to the invention to form seals for sealing and assembling components of a power train. The silicone elastomers prepared from the composition according to the invention have: good resistance to ageing in chemically aggressive fluids such as those used e.g. in a power train, in this case engine oils, gearbox and axle lubricants, oil/gasoline mixtures, coolants, fuels, or antifreeze; good adhesion properties, even to surfaces soiled by the oils used in a power train; and good mechanical-strength properties, such as breaking strength, elongation at break, and Shore hardness.
摘要:
The present invention relates to a silicone composition cross-linkable into elastomer, and to a method which uses the composition of the invention to form joints for sealing and assembling the components of a power train. The silicone elastomers prepared from the composition according to the invention have the following properties: good resistance to aging in chemically aggressive fluids, such as those used for example in a power train, in this case motor oils, gearbox and axle lubricants, oil/gasoline mixtures, coolants, and fuels or antifreeze liquids; good adhesive properties including on surfaces soiled with oils used in power trains; and good mechanical strength properties, such as tensile strength, modulus at 100% elongation, and Shore hardness.
摘要:
Coating of flexible materials with liquid compositions is disclosed. The compositions advantageously comprise one or more polyorganosiloxanes crosslinkable by polyaddition, by dehydrocondensation, by polycondensation, cationically or free-radically to form a protective coating or film having, in particular, release and/or water-repellency properties.
摘要:
A method is described for sealing and assembling components of a drive train by means of silicon elastomers prepared using silicon compositions that do not contain any metal catalyst such as, for example, tin, and cross-linking by polycondensation reactions in the presence of water (for example, ambient moisture).
摘要:
A process for the production of carboxylic acids by oxidation of a hydrocarbon by oxygen or a gas containing oxygen and notably to the oxidation of cyclohexane to give adipic acid; the subject process entails a stage of oxidation of the hydrocarbon and at least one stage for extracting the dicarboxylic acids formed from the reaction medium and optionally recycling the unconverted hydrocarbon with oxidation by-products, such as alcohols and ketones, and which also includes a stage of conversion, removal or extraction of the α,ω-hydroxycarboxylic compounds formed during the oxidation stage and converting these compounds into diacids.
摘要:
The invention concerns the general field of high speed silicone coating on various flexible cylinders, such as paper or synthetic polymer (polyolefin, polyester), or textile sheets. The invention concerns an efficient method for controlling the onset of fog when coating flexible supports with a liquid silicone composition precursor of crosslinked coatings, said coating being performed using a cylinder-type coating device operating at a high speed.
摘要:
The present invention relates to a cross-linkable, elastomeric silicone composition and to a method using the composition according to the invention to form seals for sealing and assembling components of a power train. The silicone elastomers prepared from the composition according to the invention have: good resistance to ageing in chemically aggressive fluids such as those used e.g. in a power train, in this case engine oils, gearbox and axle lubricants, oil/gasoline mixtures, coolants, fuels, or antifreeze; good adhesion properties, even to surfaces soiled by the oils used in a power train; and good mechanical-strength properties, such as breaking strength, elongation at break, and Shore hardness.
摘要:
A method is described for sealing and assembling, pointing and/or coating a substrate by means of silicon elastomers prepared using silicon compositions that do not contain any metal catalyst such as, for example, tin, and cross-linking by polycondensation reactions in the presence of water (for example, ambient moisture).
摘要:
A method is described for sealing and assembling components of a drive train by means of silicon elastomers prepared using silicon compositions that do not contain any metal catalyst such as, for example, tin, and cross-linking by polycondensation reactions in the presence of water (for example, ambient moisture).
摘要:
The present invention relates to a process for producing carboxylic acids. It relates more particularly to a process for producing carboxylic acids by oxidation of a hydrocarbon with oxygen or a gas containing oxygen, and even more particularly to the oxidation of cyclohexane to adipic acid. It relates to a process comprising a step consisting of hydrolysis of the esters formed during the oxidation step.