Organosiloxane compositions
AssigneeDow Corning Corporation
InventorsIsabelle Maton, Giuseppina Lavinaro, Jean Willieme, Thierry Dessilly, Tommy Detemmerman, Robert Drake
Life of this patent
Estimating the term…
Abstract
A method of making a diluted polysiloxane containing polymer comprising the steps of: i) Preparing a polysiloxane containing polymer by the polycondensation of siloxane containing monomers and/or oligomers which comprise condensable groups in the presence of an organopolysiloxane and/or an organic based diluent material, a suitable catalyst and optionally an end-blocking agent; and ii) Where required quenching the polymerization process; wherein the diluent material is substantially retained within the resulting diluted organopolysiloxane.
Claims27
A method of making a linear diluted polysiloxane containing polymer comprising the steps of:
- i) preparing a linear polysiloxane containing polymer by the polycondensation of siloxane containing oligomers which comprise condensable groups in the presence of an organic based extender or plasticiser, a suitable catalyst and an end-blocking agent;
- and
- ii) where required quenching the polymerisation process;
- wherein the organic based extender or plasticiser is substantially retained within the resulting linear diluted organopolysiloxane;
- and
- wherein the organic based extender or plasticiser is selected from one or more of the group comprising
- linear or branched mono unsaturated hydrocarbons;
- and
- mineral oil fractions comprising linear (n-paraffinic) mineral oils, branched (iso-paraffinic) mineral oils, cyclic (naphthenic) mineral oils, and mixtures thereof.
A moisture curable composition capable of cure to an elastomeric body, the composition comprising:
- a. a linear organopolysiloxane having not less than two silicon-bonded hydroxyl or hydrolysable groups that is diluted in an organic based extender or plasticiser;
- b. a siloxane and/or silane cross-linker having at least two groups per molecule which are reactable with the hydroxyl or hydrolysable groups in the diluted organopolysiloxane;
- c. one or more fillers;
- and
- d. a suitable cure catalyst,
- wherein the organic based extender or plasticiser is substantially retained within the linear diluted organopolysiloxane and is selected from the group comprising
- linear or branched mono unsaturated hydrocarbons;
- and
- mineral oil fractions comprising linear (n-paraffinic) mineral oils, branched (iso-paraffinic) mineral oils, cyclic (naphthenic) mineral oils, and mixtures thereof.
A method of making a linear diluted polysiloxane containing polymer comprising the steps of:
- i) preparing a linear polysiloxane containing polymer by the polycondensation of siloxane containing oligomers which comprise condensable groups in the presence of an organic based extender or plasticiser, a suitable catalyst and optionally an end-blocking agent;
- and
- ii) where required quenching the polymerisation process;
- wherein the organic based extender or plasticiser is substantially retained within the resulting linear diluted organopolysiloxane;
- and
- wherein the organic based extender or plasticiser is selected from one or more of the group of
- polyisobutylenes (PIB),
- phosphate esters, polyalkylbenzenes, and
- linear and/or branched alkylbenzenes esters of aliphatic monocarboxylic acids.
A method of making a linear diluted polysiloxane containing polymer comprising the steps of:
- i) preparing a linear polysiloxane containing polymer by the polycondensation of siloxane containing oligomers which comprise condensable groups in the presence of an organic based extender or plasticiser, a condensation catalyst selected from
- a catalyst of the general formula R20SO3H in which R20 represents an alkyl group, an aryl or an alkaryl group;
- a phosphonitrile halide catalyst;
- and
- a phosphonitrile halide ion based catalyst, and optionally an end-blocking agent;
- and
- ii) where required quenching the polymerisation process;
- wherein the organic based extender or plasticiser is substantially retained within the resulting linear diluted organopolysiloxane;
- and
- wherein the organic based extender or plasticiser is selected from one or more of the group comprising
- linear or branched mono unsaturated hydrocarbons;
- and
- mineral oil fractions comprising linear (n-paraffinic) mineral oils, branched (iso-paraffinic) mineral oils, cyclic (naphthenic) mineral oils, and mixtures thereof.
Dependencies are inferred from the claim text.