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US 3,971,747 AGranted
Curable compositions
AssigneeDow Corning Corporation
InventorsHoward M. Bank, Keith W. Michael
Life of this patent
Estimating the term…
Abstract
Certain aluminum compounds, such as aluminum alkoxides, chelates and acylates, catalyst the reaction of .tbd.SiOH with ##EQU1## to yield compositions containing ##EQU2## LINKAGES.
Claims36
A method of preparing compositions containing silicon-oxygen-carbon bonds comprising reacting under substantially anhydrous conditions
- A. an organosilicon compound containing at least one .tbd.SiOH group with
- B. a compound containing at least one epoxy group, said reaction being carried out in the presence of a catalytic amount of
- C. an aluminum compound selected from the group consisting of
- a. al(OR).sub.3 in which R is either a hydrogen atom or selected from the group consisting of alkyl radicals contaning from 1 to 20 inclusive carbon atoms or aryl and aryl-containing hydrocarbon radicals containing from 6 to 24 inclusive carbon atoms;
- ##EQU29## in which R is as previously defined, R' is selected from the group consisting of the hydrogen atom, alkyl radicals containing from 1 to 30 inclusive carbon atoms and aryl or aryl-containing radicals of at least 6 carbon atoms, n having a value of from 0 to 2 and condensates of such compounds;
- c. aluminum salts of the formula
- H.sup.+ Al.sup.-(OR).sub.4
- in which R is as previously defined;
- d. aluminosiloxy compounds of the formula
- =ALOSIR.sub.3.sup.2
- in which R.sup.2 is selected from the group consisting of --OR radicals in which R is as defined, ##EQU30## radicals in which R' is as defined, monovalent hydrocarbon or halohydrocarbon radicals containing from 1 to 30 inclusive carbon atoms, and siloxane moieties of the formula ##EQU31## in which R.sup.3 is selected from the group consisting of OR radicals in which R is as defined, ##EQU32## radicals in which R' is as defined and monovalent hydrocarbon or halohydrocarbon radicals containing from 1 to 30 inclusive carbon atoms, and a has a value of from 1 to 3;
- The remaining aluminum valences being satisfied by --OAl=, --OR, ##EQU33## or --OSIR.sub.3.sup.2 bonding, R, R' and R.sup.2 being as previously defined;
- and
- e. aluminum chelates formed by reacting compounds (a), (b) or (c) with sequestering agents in which the coordinating atoms are oxygen.
11 more elements
A substantially anhydrous composition comprising
- A. an organosilicon compound containing at least one silicon-bonded hydroxyl group;
- B. a compound containing at least one epoxy group;
- C. a catalytic amount of an aluminum compound selected from the group consisting of
- a. Al(OR).sub.3 in which R is either a hydrogen atom or selected from the group consisting of alkyl radicals containing from 1 to 20 inclusive carbon atoms or aryl and aryl-containing hydrocarbon radicals containing from 6 to 24 inclusive carbon atoms;
- ##EQU36## in which R is as previously defined, R' is selected from the group consisting of the hydrogen atom, alkyl radicals containing from 1 to 30 inclusive carbon atoms and aryl or aryl-containing radicals of at least 6 carbon atoms, n having a value of from 0 to 2 and condensates of such compounds;
- c. aluminum salts of the formula
- H.sup.+ Al.sup.-(OR).sub.4
- in which R is as previously defined;
- d. aluminosiloxy compounds of the formula
- =ALOSiR.sub.3.sup.2
- in which R.sup.2 is selected from the group consisting of --OR radicals in which R is as defined, ##EQU37## radicals in which R' is as defined, monovalent hydrocarbon or halohydrocarbon radicals containing from 1 to 30 inclusive carbon atoms, and siloxane moieties of the formula ##EQU38## in which R.sup.3 is selected from the group consisting of OR radicals in which R is as defined, ##EQU39## radicals in which R' is as defind and monovalent hydrocarbon or halohydrocarbon radicals containing from 1 to 30 inclusive carbon atoms, and a has a value of from 1 to 3;
- the remaining aluminum valences being satisfied by --OAl=, --OR, ##EQU40## or --OSIR.sub.3.sup.2 bonding, R, R' and R.sup.2 being as previously defined;
- and
- e. aluminum chelates formed by reacting compounds (a), (b) or (c) with-sequestering agents in which the coordinating atom is oxygen, said organosilicon compond (A) being pesent in an amount sufficient to provide at least 0.1 .tbd.SiOH group per epoxy group present in (B).
11 more elements
Dependencies are inferred from the claim text.