713
transformations of organochlorosilanes…………………………………… 614
16.2.6. Manufacture of tetrachlorosilane………………………………….. 615
16.2.7. Purification of diorganodichlorosilanes ………………………….. 616
16.3.
Monomers for siloxane rubbers……………………………………………. 617
16.3.1. Manufacture of siloxane rubbers ……………………………….… 617
16.3.2. Manufacture of siloxane monomers by hydrolysis of
diorganodichlorosilanes……………………………………….………….. 619
General aspects of hydrolysis of diorganodichlorosilanes ……. 620
Industrial methods for the hydrolysis of
diorganodichlorosilanes……………………………………….. 621
16.3.3. Other methods of obtaining siloxane monomers …………………. 623
Thermal rearrangement of linear polysiloxanes………………... 623
Catalytic rearrangement of linear polysiloxanes……………….. 624
16.4. Monomers for modified siloxane rubbers…………………………………. 626
16.4.1. Manufacture of hexaorganocyclotrisiloxanes…………………….. 628
16.4.2. Manufacture of organosilicon urethanes………………………….. 629
Synthesis of O-silylurethanes………………………………….. 629
Synthesis of N-silylurethanes………………………………….. 630
Synthesis of urethanes from glycoxysilanes……….…………... 631
Synthesis of carbofunctional organosilicon diols……………… 632
Synthesis of products of condensation of organosilicon
isocyanates with hydroxyl-containing compounds……………. 634
Synthesis of monomers for organosilicon polyurethanes
prepared by hydrosilylation reaction…………………………… 635
Synthesis of monomers for organosilicon polyurethanes
prepared from organosilicon bis(chloroformates)……………… 636
16.5. Monomers for polysilicohydrocarbons – permselective polymers………… 637
Chapter 17. Other organoelement monomers………………………………… 642
17.1.
Monomers for sulfur-containing polymers ……………………………….. 642
17.1.1.
Manufacture of sodium sulfide and polysulfides…………………. 642
17.1.2.
Manufacture of 1,2-dichloroethane ……………………………… 643
17.1.3.
Manufacture of p-dichlorobenzene………………………………. 643
17.2. Phosphazenes (phosphonitriles)…………………………………………… 646
17.3.
Boron-containing monomers……………………………………………… 649
17.4.
Nitrogen-containing monomers …………………………………………… 653
17.4.1.
Manufacture of monomers with azole cycles ……………………. 654
Synthesis of 2,5-bis(
p-aminopheny)-1,3,4-oxadiazole………… 655
Synthesis of 4,4-bis(p-aminophenyl)-2,2-dithiazole…………. 656