| 摘要 |
1,261,974. Siloxane oxyalkylene copolymers. SHINETSU CHEMICAL CO. 9 Dec., 1969 [10 Dec., 1968], No. 60082/69. Heading C3T. Siloxane-oxyalkylene copolymers in which the siloxane and oxyalkylene moieties are linked by a group: are prepared by reaction of an organopolysiloxane (I) which contains, directly bonded to a silicon atom, at least one group: -(CR<SP>1</SP>R<SP>2</SP>) p X with an oxyalkylene compound (II) of formula R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP> and R<SP>4</SP> are each H or monovalent hydrocarbon radicals; X is halogen; M is an alkali metal; A is -R<SP>5</SP>, -COR<SP>5</SP> or -COOR<SP>5</SP> where R<SP>5</SP> is a hydrocarbon radical having up to 10 carbon atoms; p and q are each integers from 1 to 5; r is an integer of at least 4 and m is an integer of at least 2. Examples of I are: and R is a C 1-10 monovalent hydrocarbon radical, n=1-3, s, t, u and v are each 0 or a positive integer and w is at least 1. II may be prepared by reacting an alkali metal alcoholate of a compound AO(C m H 2m O) r H with an alkali metal salt of a halogen substituted carboxylic acid: X(CR<SP>3</SP>R<SP>4</SP>) q COOM. Reaction of I and II may take place at at least 50‹ C. in 25-600 parts (of I and II) of an organic solvent, e.g. dimethylformamide, cyclohexanone, methyl isobutyl ketone, dimethylsulphoxide, nitrobenzene, benzaldehyde, cyclohexylamine or n-butyl ether. The preparation of halogen terminated intermediates is also described, e.g. CH 3 Si[(OSiMe 2 ) 5 OSiMe 2 CH 2 CH(Me)CH 2 Cl] 3 is prepared by the cohydrolysis of MeSiCl 3 , (Me) 2 SiCl 2 and (Me) 2 Si(Cl)CH 2 CH(Me)CH 2 Cl. Uses.-Surfactants. |
