This invention relates to flame retardant phenol aldehyde foams which have a k value below 0.020 W/mk. The foams have as flame retardants a blend of a halosubstituted diphenyl oxide and an organic phosphorus compound. The feature of the invention is that unlike conventional flame retardants, the blend now used does not adversely affect the low k value i.e. the low thermal conductivity of the foam.

This invention relates to flame retardant phenol aldehyde foams which have a k value below 0.020 W/mk. The foams have as flame retardants a blend of a halosubstituted diphenyl oxide and an organic phosphorus compound. The feature of the invention is that unlike conventional flame retardants, the blend now used does not adversely affect the low k value i.e. the low thermal conductivity of the foam.

For the preparation of 4'-0-tetrahydropyranyladriamycin b, the 9,14-position of the starting adriamycin is previously protected with phenylboronic acid and then the 4'-position of the thus protected adriamycin is selectively tetrahydropyranylated. After the tetrahydropyranylation, the by-product of 4'-0-tetrahydropyranyladriamycin a is converted to the aimed product of 4'-0-tetrahydropyranyladriam...

A tube system e.g. as cable conduit comprises a plurality of plastics tubes (1) joined together by integral spacers (2) formed as foil hinges so that the tube system can be wrapped about a centre-point (3) to form a bunch by elastically deforming the foil hinges, and the individual tubes (1) have integral core elements (4) which assemble into a stabilising core (5) in the wrapped bunch. The core e...

A tube system e.g. as cable conduit comprises a plurality of plastics tubes (1) joined together by integral spacers (2) formed as foil hinges so that the tube system can be wrapped about a centre-point (3) to form a bunch by elastically deforming the foil hinges, and the individual tubes (1) have integral core elements (4) which assemble into a stabilising core (5) in the wrapped bunch. The core e...

A tube system e.g. as cable conduit comprises a plurality of plastics tubes (1) joined together by integral spacers (2) formed as foil hinges so that the tube system can be wrapped about a centre-point (3) to form a bunch by elastically deforming the foil hinges, and the individual tubes (1) have integral core elements (4) which assemble into a stabilising core (5) in the wrapped bunch. The core e...

A tube system e.g. as cable conduit comprises a plurality of plastics tubes (1) joined together by integral spacers (2) formed as foil hinges so that the tube system can be wrapped about a centre-point (3) to form a bunch by elastically deforming the foil hinges, and the individual tubes (1) have integral core elements (4) which assemble into a stabilising core (5) in the wrapped bunch. The core e...