Ciba-geigy Corporation

Ciba Specialty Chemicals Corporation

Conception Et Developpement Michelin

Conception Et Developpement Michelin S.a.

Michelin Recherche Et Technique S.a.

Roger Meuwly

Andreas Valet

Mario Slongo

Marcel Tornare

Jean-Louis Linda

Joseph Suhadolnik

Carmen Hendricks

Gerald Bourqui

Ramanathan Ravichandran

Stephen D Pastor

Pascal Hayoz

Paul A Odorisio

Jean-Luc Birbaum

Werner Rutsch

Joseph E Babiarz

Vien V Toan

Tyler A Stevenson

Michael Ackerman

Henri Hinc

Christian Schregenberger

Gérald Bourqui

John Francis Oswald

Hervé Mousty

A method for manufacturing a stator of an electrical rotating machine that is configured to have a rotor mounted inside the stator. The stator has a laminated magnetic circuit having a stack of magnetic metal sheets disposed substantially parallel to a plane perpendicular to the axis of rotation of the rotor of the machine. The magnetic circuit has teeth that delimit longitudinally oriented slots. The method includes the step of installing electrically conductive wires in the slots and forming winding heads at the two axial ends of the magnetic circuit and installing this assembly on a vertical axis. The assembly is trapped between an outer sheath, forming part of the final motor, and a removable inner core substantially occupying a volume reserved for the rotor. The conductive wires in the slots are impregnated under vacuum with a slot-impregnating composition including a heat-setting resin and a filler, and the composition is polymerized.

Method for manufacturing a stator of an electrical rotating machine

A method is provided for manufacturing a stator of an electrical rotating machine. The method includes: impregnating a first winding head with a first composition that includes a heat-setting resin and a filler of a first particle size; impregnating conductive wires in a slot region with a slot-impregnating composition that includes a heat-setting resin and another filler of a second particle size smaller than the first particle size of the filler of the first composition; and impregnating a second winding head with a composition that includes a heat-setting resin and a filler of a particle size larger than the second particle size.

A process for making a composite product in which reinforcement fibers are subjected to a composition based on a thermohardening resin and a photoinitiator appropriate to the irradiation by which the composition is to be treated. The resulting pre-impregnated material is introduced into a prepolymerization device, in which the pre-impregnated material is prepolymerized by appropriate irradiation. Lengths of the precomposite are applied to a support, the shape of which is dictated by the shape of one face of the composite part which is to be made, and are stacked one on another in a suitable number and placed snugly against the shape of the support, and the stack is subjected to final molding at a suitable pressure and temperature in order to polymerize the resin and to join the different lengths of precomposite.

Process for manufacturing highly stressed composite parts

The stator for an electrical machine comprises a laminated magnetic circuit having a plurality of teeth delimiting longitudinally oriented slots, electrically conductive wires being disposed in the slots, and winding heads at the ends of the stator. An outer sheath forms part of the final motor. The stator includes a composition for impregnating the winding heads, of which the filler has a large particle size, and a slot-impregnating composition , containing a filler of smaller particle size.

Electrical rotating machine and process for the manufacture thereof

2-Hydroxybenzophenone derivatives substituted in the 4&prime;-position by a thioether moiety exhibit enhanced absorption in the UV at longer wavelength. Compositions comprising organic material subject to actinic degradation are beneficially stabilized with such derivatives.

Thioether substituted hydroxybenzophenones and stabilized compositions

A process for preparing 2-(2,4-dihydroxyphenyl)-4.6-diaryl-s-triazines in three steps starting with cyanuric chloride is described. Step,involves the nucleophilic (basic) displacement of one chlorine atom with a phenolic moiety. Step,involves a Friedel-Crafts reaction using a Lewis acid catalyst (preferably aluminum chloride) to replace the remaining two chlorine atoms with aryl groups such as xylyl. Finally, step,involves replacing the phenolic moiety with resorcinol using either a Lewis acid or protic acid catalyst or combinations thereof. Some additional processes only peripherally related to the three-step process outlined above are also described for the preparation of various s-triazine compounds. The s-triazines prepared are useful as UV absorbers for the stabilization of organic substrates against the adverse effects of actinic light.

Methods for the preparation of tris-aryl-o-hydroxyphenyl-s-triazines

Compositions based on synthetic organic polymers or prepolymers are effectively stabilized against the damaging effects of light, oxygen and/or heat by addition of a compound of the formula I ##STR1## in which Z is a group of one of the formulae II or III, ##STR2## R.sub.7 and R.sub.17, independently of one another, are a radical of one of the formulae IV, V and VI ##STR3## and the remaining symbols are as defined in claim 1.

Hydroxyphenyltriazines

Oligomeric or polymeric siloxanes of the formula I ##STR1## if X is a monovalent radical, or which are correspondingly crosslinked, if X is a polyvalent radical, whose repeating units are arranged randomly or in blocks, which contain hydroxy-phenyl-diaryl-s-triazine moieties, are useful as stabilizers for organic material against damage thereto by light, oxygen and heat; and especially as stabilizers for coating materials.

Polysiloxane light stabilizers

The invention relates to a method of protecting surfaces of wood against damage by light by treatment with a coating composition comprising a benzophenone of the formula I ##STR1## in which the substituents are defined as in claim 1.

Protective coating for wood

Curable compositions comprising (a) a fluorine- or silicon-containing copolymer, (b) a (meth)acrylic copolymer and (c) at least one curing agent are described, each of the two copolymers comprising functional groups which can react with the curing agent, wherein the fluorine- or silicon-containing copolymer comprises a UV absorber which is chemically bound by reaction with the free reactive groups of the copolymer. These copolymer compositions can be used as paint binders.

Light-stabilised copolymer compositions as paint binders

The stabilised binder is a mixture of two copolymers and at least one curing agent. The one copolymer contains fluorine or silicon and a UV absorber in copolymerised form. The other copolymer is an acrylic resin. Suitable curing agents are melamine resins or polyisocyanates.

Light-stabilized binders for coating compositions

The stabilized binder is a mixture of two copolymers and at least one curing agent. The one copolymer contains fluorine or silicon and a UV absorber in copolymierized form. The other copolymer is an acrylic resin. Suitalbe curing agents are melamine resins or polyisocyanates.

2-(2-Hydroxyphenyl)-4,6-diaryl-1,3,5-triazines, which carry in the 4-position of the 2-hydroxyphenyl radical a silyl group linked through oxygen to the phenyl nucleus, as well as condensation products whose ##STR1## units contain 2-(2-hydroxyphenyl)-4,6-diaryl-1,3,5-triazines in the side-chain, are UV absorbers which are suitable for use as stabilizers for organic polymers.

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Cournillens, Switzerland

Roger Meuwly