公开(公告)号：US3494950A

公开(公告)日：1970-02-10

申请号：US3494950D

申请日：1966-05-25

Applicant: BAYER AG

Inventor： SIMMLER WALTER ,  SATTLEGGER HANS ,  NIEDERPRUM HANS

IPC: C07F7/08 ,  C07F7/18 ,  C08G77/00 ,  C08G77/48 ,  C08F11/04

CPC classification number: C07F7/1896 ,  C07F7/0858 ,  C08G77/00 ,  C08G77/48

Abstract: The novel methyl-(acyloxymethyl)-acyloxy silicon compounds of the formula where Y is CH3, -O-A or and -O-A is a carboxylic acid radical are obtained by adding a mono- or di-carboxylic acid to a mixture of a methyl-(halomethyl)-chlorosilane of the formula in which Hal is Cl or Br and X is CH3 or Cl, and a tertiary amine, a mono- or di-carboxylic acid. The radical -O-A may be a formic, acetic, propionic, stearic, methacrylic, benzoic, oxalic, glutaric, adipic, phthalic, isophthalic or terephthalic acid radical. In the case of a dicarboxylic acid, compounds having unit formula may be obtained where R is an alkylene radical of 1 to 4 carbon atoms or a phenylene radical and n is 0 or 1. A suitable tertiary amine is triethylamino. The reaction may be carried out in an inert solvent e.g. toluene or xylene. The compounds prepared in the examples are dimethyl - (acetoxymethyl) - acetoxy silane, dimethyl - (methacryloxymethyl) - methacryloxy silane, methyl - (acetoxymethyl) - diacetoxysilane, 1,3 - dimethyl - 1,3 - di(acetoxymethyl)-diacetoxy -disoloxane and a polyester consisting of alternating adipic acid anhydride units and dimethyl-(oxymethyl)-silyl units.

公开(公告)号：US3437679A

公开(公告)日：1969-04-08

申请号：US3437679D

申请日：1966-07-06

Applicant: BAYER AG

Inventor： SIMMLER WALTER ,  NIEDERPRUM HANS ,  SATTLEGGER HANS

IPC: C07F7/08 ,  C07D103/02

CPC classification number: C07F7/0889 ,  C07F7/0841

Abstract: 2,2,6,6 - Tetra - methyl - 2,6 - disila - 1,4-dioxan is prepared by heating 1,3-di-(hydroxymethyl) tetramethyl disiloxane in the presence of p-toluene sulphonic acid as catalyst in a column distillation apparatus to a temperature in the range 100 DEG to 150 DEG C. at atmospheric pressure until about 0.8 mol water per mol of disiloxane has distilled over together with part of the product, adding to the reaction mixture a further catalytic amount of p-toluene sulphonic acid and then heating the mixture under reduced pressure at 120 DEG to 180 DEG C. to distil over the remainder of the product. The 1,3-di-(hydroxymethyl)-tetramethyl disiloxane is obtained by transesterification of a 1,3-di-(acyloxymethyl)-tetramethyl disiloxane, a dimethyl-(acyloxymethyl)-acyloxysilane or a dimethyl-(acyloxymethyl)-alkoxy silane with excess methanol in the presence of p-toluene sulphonic acid and the process can be effected using this transesterification product in the raw state directly.

公开(公告)号：US3449393A

公开(公告)日：1969-06-10

申请号：US3449393D

申请日：1966-10-26

Applicant: BAYER AG

Inventor： SATTLEGGER HANS ,  SIMMLER WALTER ,  NOLL WALTER ,  NIEDERPRUM HANS

IPC: C07F7/12 ,  C07F7/02 ,  C07F7/10

CPC classification number: C07F7/127 ,  Y02P20/582

公开(公告)号：US3444228A

公开(公告)日：1969-05-13

申请号：US3444228D

申请日：1966-07-06

Applicant: BAYER AG

Inventor： SIMMLER WALTER ,  NIEDERPRUM HANS ,  SATTLEGGER HANS

IPC: C07F7/08 ,  C07F7/18 ,  C07F7/02

CPC classification number: C07F7/0841

Abstract: 2,2,5,5 - Tetramethyl - 2,5 - disila - 1,3 - dioxolan of the formula may be prepared by two methods. One method comprises heating a mixture of equimolar amounts of 1,3 - di - (hydroxymethyl) - tetramethyldisiloxane and 1,3 - di(bromomethyl)-tetramethyl disiloxane and excess methylamine until salt precipitation is complete, removing the nitrogen compounds from the mixture, adding p-toluene sulphonic acid as catalyst, distilling under reduced pressure and recovering the product as the distilate. The second method comprises heating a mixture of equimolar amounts of dimethyl - (acetoxymethyl)-acetoxysilane and dimethyldiethoxysilane, 5-20 fold molar amount of methanol and p-toluene sulphonic acid as catalyst, distilling off methanol, ethanol and methyl acetate, and then distilling under reduced pressure and recovering the product as the distillate. Hydrolysis of the product alone gives 1,7-di-(hydroxymethyl)-octamethyltetrasiloxane and cohydrolysis with organoalkoxysilanes gives organopolysiloxanes with terminal hydroxymethyl groups. Copolymerization with trioxan gives polyoxymethylenes with siloxane segments.

公开(公告)号：US3442925A

公开(公告)日：1969-05-06

申请号：US3442925D

申请日：1966-07-01

Applicant: BAYER AG

Inventor： SIMMLER WALTER ,  NIEDERPRUM HANS ,  SATTLEGGER HANS

IPC: C07F7/08 ,  C08G77/14 ,  C07F7/18 ,  C07F7/02

CPC classification number: C08G77/14 ,  C07F7/0852 ,  C07F7/0889