Abstract: The invention relates to general syntheses of (6H)-dibenz[c,e] [1,2]-oxaphosphorins which are substituted with nitrogen compounds on the phosphorus atom and comprising commercially available 6H-dibenz[c,e] [1,2]-oxaphosphorin-6-oxides. These nitrogen-containing (6H)-dibenz[c,e] [1,2]-oxaphosphorins can be used as reactive starting substances for further syntheses or as flameproofing agents or as stabilisers.

Abstract: To improve an intake device (100) for a handheld tool implemented having an air cleaner, particularly for a chainsaw, a cuffing-off grinder, or the like, which comprises an internal combustion engine (25) and a drive unit (20) for the attachment, the air cleaner cleaning combustion air, which is charged with dirt particles, for the engine (25), in that a centrifugal separator (30) separates the combustion air into at least one first air flow (31), which is freed from dirt particles as much as possible, and a second air flow (32), which is loaded with dirt particles, in particular to cause higher efficiency of the intake device, it is suggested that a blower (10) be situated on the drive unit (20), which sucks in the second air flow (32), by which cooling of the drive unit (20) is caused.

Abstract: A process is provided for the preparation of 9,10-dihydro-9-oxa-10-organylphosphaphenanthrene-10-oxide and derivatives of same substituted on the phenyl groups, in which: (a) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOP) or a derivative of same is reacted in the presence of at least one mono- or polyhydric alcohol with at least one ortho ester with formation of a first intermediate product, (b) the intermediate product from step (a) is optionally reacted with at least one further mono- or polyhydric alcohol with formation of a further intermediate product and (c) the intermediate product from steps (a) or (b) is transformed by addition of catalytic quantities of alkylation agent into 9,10-dihydro-9-oxa-10-organylphosphaphenanthrene-10-oxide or a derivative of same substituted on the phenyl groups.

Abstract: A process is provided for the preparation of 9,10-dihydro-9-oxa-10-organyloxyphosphaphenanthrene-10-oxide or -thione and derivatives of same substituted on the phenyl groups, in which: (a) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOP) or a derivative of same is reacted in the presence of at least one mono- or polyhydric alcohol with at least one ortho ester with formation of a first intermediate product, (b) the intermediate product from step (a) is optionally reacted with at least one further mono- or polyhydric alcohol with formation of a further intermediate product and (c) the intermediate product from steps (a) or (b) is transformed by addition of oxidation agent into 9,10-dihydro-9-oxa-10-organyloxyphosphaphenanthrene-10-oxide or -thione or a derivative of same substituted on the phenyl groups.

Abstract: To improve an intake device (100) for a handheld tool implemented having an air cleaner, particularly for a chainsaw, a cutting-off grinder, or the like, which comprises an internal combustion engine (25) and a drive unit (20) for the attachment, the air cleaner cleaning combustion air, which is charged with dirt particles, for the engine (25), in that a centrifugal separator (30) separates the combustion air into at least one first air flow (31), which is freed from dirt particles as much as possible, and a second air flow (32), which is loaded with dirt particles, in particular to cause higher efficiency of the intake device, it is suggested that a blower (10) be situated on the drive unit (20), which sucks in the second air flow (32), by which cooling of the drive unit (20) is caused.

Abstract: The present invention relates to a process for preparing 6-alkoxy-(6H)-dibenzo[c,e][1,2]oxaphosphorins, wherein 6H-dibenzo[c,e][1,2]oxaphosphorin 6-oxides of the formula I are used as the reactant.

Abstract: The present invention relates to a process for preparing 6-alkoxy-(6H)-dibenzo[c,e][1,2]oxaphosphorins, wherein 6H-dibenzo[c,e][1,2]oxaphosphorin 6-oxides of the formula I are used as the reactant.

Abstract: This invention entails a guide device, especially for use with abrasive cutting-off machines, which has at least one rolling means for rolling the guide device substantially by the body power of a user. The guide device has at least one handle arranged opposite the rolling means for transferring a force exerted by the arms of the user onto the handle. The device is characterized by a pushing element for transferring a force exerted by another body part of the user, in particular the thigh, onto the guide device.

Abstract: A process is provided for the preparation of 9,10-dihydro-9-oxa-10-organylphosphaphenanthrene-10-oxide and derivatives of same substituted on the phenyl groups, in which: (a) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOP) or a derivative of same is reacted in the presence of at least one mono- or polyhydric alcohol with at least one ortho ester with formation of a first intermediate product, (b) the intermediate product from step (a) is optionally reacted with at least one further mono- or polyhydric alcohol with formation of a further intermediate product and (c) the intermediate product from steps (a) or (b) is transformed by addition of catalytic quantities of alkylation agent into 9,10-dihydro-9-oxa-10-organylphosphaphenanthrene-10-oxide or a derivative of same substituted on the phenyl groups.

Abstract: A process is provided for the preparation of 9,10-dihydro-9-oxa-10-organyloxyphosphaphenanthrene-10-oxide or -thione and derivatives of same substituted on the phenyl groups, in which: (a) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOP) or a derivative of same is reacted in the presence of at least one mono- or polyhydric alcohol with at least one ortho ester with formation of a first intermediate product, (b) the intermediate product from step (a) is optionally reacted with at least one further mono- or polyhydric alcohol with formation of a further intermediate product and (c) the intermediate product from steps (a) or (b) is transformed by addition of oxidation agent into 9,10-dihydro-9-oxa-10-organyloxyphosphaphenanthrene-10-oxide or -thione or a derivative of same substituted on the phenyl groups.

Abstract: Novel derivatives of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, processes for their preparation and the use of the derivatives for flame protection of natural products and plastics are disclosed.

Abstract: Metal compounds of pseudohalogenides and their use as curing agents for epoxy compounds which curing agents can be produced by mixing the reactants in aqueous solution and are distinguished by a long processibility time at temperatures up to 100° C. as well as by very short curing times at temperatures in the range of 120 to 160° C.

Abstract: Neutral metal complex salts with additional ligands acting as bases and a process for their preparation and their use as latent polymerization catalysts for the production of pre-cured products which can be further cured without another curing catalyst.

Abstract: A polymerizable mixture comprising 100 parts by weight of at least one epoxy compound and 0.01 to 50 parts by weight of a metal complex compound of the formulaML.sub.x B.sub.y or M[SR].sub.x B.sub.z,wherein M is a metal ion of a metal of main groups II and III and sub-groups thereof of the Periodic Table, L is a chelate forming ligand selected from the group consisting of dioximes, .alpha.- and .beta.-hydroxycarbonyl compounds or enolizable 1,3-diketones, SR is an acid ion of an inorganic acid, B is a Lewis base, x is an integer from 1 to 8, y is an integer from 1 to 5 and z is an integer from 7 or 8 with the proviso that B is not a polyvalent phenolic compound and a process for the polymerization thereof.

Abstract: A process for the preparation of complex salts with additional coordinated ligands comprising reacting with through mixing at 20.degree. to 200.degree. C. a complex-forming metal salt of a metal of the second and third main groups of the Periodic Table and the subgroups thereof with a stoichiometric amount of at least one member of the group consisting of a chelating ligand and a Lewis base in the absence of a solvent according to the equation:M.sub.m.sup.a+ (SR.sup.b-)n+xL.multidot.cH+yB.sup.- .fwdarw.m[M.sup.a+ (SR.sup.b-)(n-o)L.sub.x B.sub.y ]+o.multidot.SR.sup.b- +c.multidot.H.sup.+Iwherein M is a metal ion, SR is an acid radical of an organic or inorganic acid, B is a Lewis base, and L is a chelating ligand, m.multidot.a=b.multidot.(n-o)+c.multidot.x, wherein a=an integer of 1-8, b=an integer of 1-3, c=an integer of 0-4, m=an integer of 1-3, n=an integer of 1-8, o=an integer of 0-8, x=an integer of 0-4, y=and integer of 1-16, wherein (n-o)+x+y.ltoreq.

Abstract: Neutral metal complex salts with additional ligands acting as bases and a process for their preparation and their use as latent polymerization catalysts for the production of pre-cured products which can be further cured without another curing catalyst.

Abstract: A polymerizable mixture comprising 100 parts by weight of at least one epoxy compound and 0.01 to 50 parts by weight of a metal complex compound of the formulaML.sub.x B.sub.y or M[SR].sub.x B.sub.z,wherein M is a metal ion of a metal of main groups II and III and sub-groups thereof of the Periodic Table, L is a chelate forming ligand selected from the group consisting of dioximes, .alpha.- and .beta.-hydroxycarbonyl compounds or enolizable 1,3-diketones, SR is an acid ion of an inorganic acid, B is a Lewis base, x is an integer from 1 to 8, y is an integer from 1 to 5 and z is an integer from 7 or 8 with the proviso that B is not a polyvalent phenolic compound and a process for the polymerization thereof.