An organopolysiloxane that can suppress swelling of a container due to a hydrogen gas derived from SiH groups and occurrence of an offensive odor derived from aliphatic unsaturated groups, and that is excellent in emulsification stability and has good cosmetic durability, and a cosmetic containing the same. The organopolysiloxane being represented by the following average formula (1): ##STR00001##
wherein, R1 represents a group selected from an alkyl group having 1 to 30 carbon atoms, etc., R2 represents a divalent organic group having 2 to 15 carbon atoms, R3 represents any of a hydrogen atom and an alkyl group having 1 to 30 carbon atoms, R4s each independently represent a group selected from an alkyl group having 2 to 30 carbon atoms and another organopolysiloxane, a is 1 to 500, b is 1 to 10, and c is 1 to 10.

An organopolysiloxane that can suppress swelling of a container due to a hydrogen gas derived from SiH groups and occurrence of an offensive odor derived from aliphatic unsaturated groups, and that is excellent in emulsification stability and has good cosmetic durability, and a cosmetic containing the same. The organopolysiloxane being represented by the following average formula (1): ##STR00001##
wherein, R1 represents a group selected from an alkyl group having 1 to 30 carbon atoms, etc., R2 represents a divalent organic group having 2 to 15 carbon atoms, R3 represents any of a hydrogen atom and an alkyl group having 1 to 30 carbon atoms, R4s each independently represent a group selected from an alkyl group having 2 to 30 carbon atoms and another organopolysiloxane, a is 1 to 500, b is 1 to 10, and c is 1 to 10.

A silicone-polyether copolymer has the formula X.sub.g[Z.sub.jY.sub.o].sub.c, where each X is an independently selected silicone moiety having a particular structure, each Y is an independently selected polyether moiety, each Z is an independently selected siloxane moiety, subscript c is from 1 to 150, subscript g is >1, and each subscript j and o are independently >0 and <2, with the proviso that j+o=2 in each moiety indicated by subscript c. A method of preparing the silicone-polyether copolymer is also disclosed, and comprises reacting a polyether compound, a chain extending organosilicon compound, and an endcapping organosilicon compound in the presence of a hydrosilylation catalyst. A sealant is also disclosed, the sealant comprising the silicone-polyether copolymer and a condensation-reaction catalyst.

A silicone-polyether copolymer has the formula (X-D.sup.2).sub.g-Y, where each X is an independently selected silicone moiety having a particular structure, D.sup.2 is a divalent hydrocarbon group, subscript g is greater than 1, and Y is a linear or branched polyether moiety. A method of preparing the silicone-polyether copolymer comprising reacting a polyether compound and an organosilicon compound in the presence of a hydrosilylation-reaction catalyst. A sealant is also disclosed, the sealant comprising the silicone-polyether copolymer and a condensation-reaction catalyst.

A silicone polyether for use in forming a solid polymer electrolyte film, the silicone polyether comprising a heterocyclic moiety. The silicone polyether comprising the heterocyclic moiety may be used to provide an electrolyte composition suitable for use in an electrochemical device. The silicone polyether comprising a heterocyclic moiety may also be used to form a solid polymer electrolyte that may be used to form a solid polymer electrolyte film, which may be suitable for use in electrochemical devices.

An isocyanate-functional silicone-polyether copolymer having a particular structure is disclosed. A method of preparing the isocyanate-functional silicone-polyether copolymer is also disclosed, the method comprising reacting a polyether compound and an organosilicon compound to give the isocyanate-functional silicone-polyether copolymer. A silicone-polyether-urethane copolymer formed therewith, as well as a method of preparing the silicone-polyether-urethane copolymer, are also disclosed. Sealants comprising the isocyanate-functional silicone-polyether copolymer and/or the silicone-polyether-urethane copolymer are further disclosed.

A silicone-polyether copolymer has the formula X.sub.gY, where each X is an independently selected silicone moiety having a particular structure, Y is a linear or branched polyether moiety, and subscript g is on average more than 1. A method of preparing the silicone-polyether copolymer comprising reacting a polyether compound and an organosilicon compound in the presence of a hydrosilylation-reaction catalyst. A sealant is also disclosed, the sealant comprising the silicone-polyether copolymer and a condensation-reaction catalyst.

A silicone-polyether copolymer has the formula XY, where X is a silicone moiety having a particular structure and Y is a polyether moiety. An isocyanate-functional silicone-polyether copolymer formed therewith is also disclosed. Further, a silicone-poly-ether-urethane copolymer formed with the isocyanate-functional silicone-polyether copolymer is disclosed. Related methods of preparation as well as sealants and cured products thereof are further disclosed.

An organic silicon compound is disclosed which is represented by a formula: (R.sup.1.sub.3SiO).sub.3SiR.sup.2[SiR.sup.3.sub.2O].sub.y[SiR.sup.3.sub.2].sub.wR.sup.4R.sup.5, wherein each of R.sup.1 and R.sup.3 is a group independently selected from the group consisting of alkyl groups, alkenyl groups, aryl groups, aralkyl groups and alkoxy groups having 1 to 20 carbon atoms, R.sup.2 is a divalent hydrocarbon group or an oxygen atom, R.sup.4 is a divalent hydrocarbon group, or a direct bond to a silicon (Si) atom, R.sup.5 is a monovalent group represented by (R.sup.6O).sub.qR.sup.7.sub.(3-q)Si or a monovalent hydrocarbon group having 1 to 20 carbon atoms, and each of R.sup.6 and R.sup.7 is a group independently selected from the group consisting of alkyl groups, alkenyl groups, aryl groups, aralkyl groups and alkoxy groups having 1 to 20 carbon atoms, and q is an integer between 1 and 3, y is an integer between 0 and 200, and w is 0 or 1.

The present invention relates to a process for preparing a linear carbosiloxane polymer, which comprises subjecting at least one thoroughly purified cyclic carbosiloxane monomer to ring opening polymerization in the presence of an acidic or basic catalyst and at least one silanol-functional compound.