Process for preparing silicone microparticles cured by a Michael addition reactor

Claim 2

A process for preparing microspheres of solid organopolysiloxane, said process comprising (I) preparing a dispersion of discrete entities in a fluid continuous phase by dispersing. in the continuous phase fluid, a liquid organopolysiloxane composition convertible to the solid state at room temperature, said liquid organopolysiloxane composition being insoluble in the fluid continuous phase and consisting essentially of (i) an organopolysiloxane having attached thereto through silicon-carbon bonds an average of at least two X groups per molecule, wherein X is a monovalent organic moiety containing at least one -NHR" radical, wherein R" is selected from hydrogen or alkyl having 1 to 6 carbon atoms, and (ii) an organopolysiloxane having attached thereto through silicon-carbon bonds an average of at least two Z groups per molecule, wherein Z is a monovalent organic moiety containing at least one acryl-functional radical which is capable of reacting with said -NHR" radical, said acryl-functional radical being selected from acryloxy, methacryloxy or acrylamide radicals, at least one of (i) and (ii) having an average of more than two of said X groups and said Z groups, respectively, per molecule; and (II) curing said composition until said organopolysiloxane composition is converted to the solid state.

Claim 3

The process according to claim 1, wherein said organopolysiloxane (i) is selected from linear copolymers having the average structure or in which the average value of x can vary from about zero to about 900 and the average value of y can vary from 2 to about 100; and said organopolysiloxane (ii) is selected from linear copolymers having the average structure or in which the average value of x' can vary from about 5 to about 150 and the average value of y' can vary from 2 to about 30.

Claim 4

A process for preparing microcapsules of an internal material localized as a core in a solid organopolysiloxane, said process comprising: (I) preparing a dispersion of discrete entities in a fluid continuous phase by dispersing the internal material in the continuous phase fluid and simultaneously or subsequently codispersing therewith a liquid organopolysiloxane composition convertible to the solid state at room temperature and insoluble in the fluid continuous phase, said composition consisting essentially of (i) an organopolysiloxane having attached thereto through silicon-carbon bonds an average of at least two X groups per molecule, wherein X is a monovalent organic moiety containing at least one -NHR" radical, wherein R" is selected from hydrogen or alkyl having 1 to 6 carbon atoms, and (ii) an organopolysiloxane having attached thereto through silicon-carbon bonds an average of at least two Z groups per molecule, wherein Z is a monovalent organic moiety containing at least one acryl-functional radical which is capable of reacting with said -NHR" radical, said acryl-functional radical being selected from acryloxy, methacryloxy or acrylamide radicals, at least one of (i) and (ii) having an average of more than two of said X groups and said Z groups, respectively, per molecule; and (II) curing said composition until said organopolysiloxane composition is converted to the solid state.

Claim 5

A process for preparing microcapsules of an internal material localized as a core in a solid organopolysiloxane, said process comprising: (I) preparing a dispersion of discrete entities in a fluid continuous phase by dispersing the internal material in the continuous phase fluid and simultaneously or subsequently codispersing therewith a liquid organopolysiloxane composition convertible to the solid state at room temperature and insoluble in the fluid continuous phase, said composition consisting essentially of (i) an organopolysiloxane having attached thereto through silicon-carbon bonds an average of at least two X groups per molecule, wherein X is a monovalent organic moiety containing at least one -NHR" radical, wherein R" is selected from hydrogen or alkyl having 1 to 6 carbon atoms, and (ii) an organopolysiloxane having attached thereto through silicon-carbon bonds an average of at least two Z groups per molecule, wherein Z is a monovalent organic moiety containing at least one acryl-functional radical which is capable of reacting with said -NHR" radical, said acryl-functional radical being selected from acryloxy, methacryloxy or acrylamide radicals, at least one of (i) and (ii) having an average of more than two of said X groups and said Z groups, respectively, per molecule; and (II) curing said composition until said organopolysiloxane composition is converted to the solid state.

Claim 6

The process according to claim 3, wherein said organopolysiloxane (i) is selected from linear copolymers having the average structure or in which the average value of x can vary from zero to about 900 and the average value of y can vary from 2 to about 100; and said organopolysiloxane (ii) is selected from linear copolymers having the average structure or in which the average value of x' can vary from about 5 to about 150 and the average value of y' can vary from 2 to about 30.

Claim 7

A process for preparing microcapsules of an internal material dispersed throughout a solid organopolysiloxane. said process comprising: (I) preparing a dispersion of discrete entities in a fluid continuous phase by dispersing or dissolving the internal material in a liquid organopolysiloxane composition convertible to the solid state at room temperature, and dispersing the resulting dispersion or solution in the continuous phase fluid, said organopolysiloxane composition being insoluble in the fluid continuous phase and consisting essentially of (i) an organopolysiloxane having attached thereto through silicon-carbon bonds an average of at least two X groups per molecule, wherein X is a monovalent organic moiety containing at least one -NHR" radical, wherein R" is selected from hydrogen or alkyl having 1 to 6 carbon atoms, and (ii) an organopolysiloxane having attached thereto through silicon-carbon bonds an average of at least two Z groups per molecule, wherein Z is a monovalent organic moiety containing at least one acryl-functional radical which is capable of reacting with said -NHR" radical, said acryl-functional radical being selected from acryloxy, methacryloxy or acrylamide radicals, at least one of (i) and (ii) having an average of more than two of said X groups and said Z groups, respectively, per molecule; and (II) curing said composition until said organopolysiloxane composition is converted to the solid state.

Claim 8

A process for preparing microcapsules of an internal material dispersed throughout a solid organopolysiloxane. said process comprising: (I) preparing a dispersion of discrete entities in a fluid continuous phase by dispersing or dissolving the internal material in a liquid organopolysiloxane composition convertible to the solid state at room temperature, and dispersing the resulting dispersion or solution in the continuous phase fluid, said organopolysiloxane composition being insoluble in the fluid continuous phase and consisting essentially of (i) an organopolysiloxane having attached thereto through silicon-carbon bonds an average of at least two X groups per molecule, wherein X is a monovalent organic moiety containing at least one -NHR" radical, wherein R" is selected from hydrogen or alkyl having 1 to 6 carbon atoms, and (ii) an organopolysiloxane having attached thereto through silicon-carbon bonds an average of at least two Z groups per molecule, wherein Z is a monovalent organic moiety containing at least one acryl-functional radical which is capable of reacting with said -NHR" radical, said acryl-functional radical being selected from acryloxy, methacryloxy or acrylamide radicals, at least one of (i) and (ii) having an average of more than two of said X groups and said Z groups, respectively, per molecule; and (II) curing said composition until said organopolysiloxane composition is converted to the solid state.

Claim 9

The process according to claim 5, wherein said organopolysiloxane (i) is selected from linear copolymers having the average structure or 1 in which the average value of x can vary from zero to about 900 and the average value of y can vary from 2 to about 100; and said organopolysiloxane (ii) is selected from linear copolymers having the average structure or in which the average value of x' can vary from about 5 to about 150 and the average value of y' can vary from 2 to about 30.