The present disclosure provides a silica aerogel-including blanket including a substrate for a blanket; and a silica aerogel and an opacifying agent locating at least one of on a surface of and inside the substrate for a blanket, wherein the opacifying agent is a second particulate with inorganic particles of a first particulate being aggregated, and includes 1 to 5 of the inorganic particles per unit volume of 1 m.sup.3, and a method for preparing the same. The silica aerogel-including blanket according to the present disclosure is capable of exhibiting flame retardancy as well as an excellent insulation property, particularly, an excellent insulation property at high temperatures, by including an opacifying agent having excellent dispersibility and high surface activity through chemical etching.

An object of the present invention is to provide a silicon oligomer having a novel function that has not been achieved by a conventional condensation product of water and a tetraalkoxysilane. Provided are a silicon oligomer represented by the following formula (I) and a production method therefor: ##STR00001## wherein R.sub.1 to R.sub.10 each independently is an alkyl group or a hydroxyalkyl group, each having 1 to 4 carbon atoms; X.sub.1 to X.sub.3 each independently is a group represented by the following formula (II); n is 0 or 1; and m is an integer of 1 to 3 when n is 0, and m is 1 when n is 1: ##STR00002## wherein A is an alkylene group having 2 to 4 carbon atoms which may be branched, and 1 is an integer of 1 to 3.

An object of the present invention is to provide a silicon oligomer having a novel function that has not been achieved by a conventional condensation product of water and a tetraalkoxysilane. Provided are a silicon oligomer represented by the following formula (I) and a production method therefor: ##STR00001## wherein R.sub.1 to R.sub.10 each independently is an alkyl group or a hydroxyalkyl group, each having 1 to 4 carbon atoms; X.sub.1 to X.sub.3 each independently is a group represented by the following formula (II); n is 0 or 1; and m is an integer of 1 to 3 when n is 0, and m is 1 when n is 1: ##STR00002## wherein A is an alkylene group having 2 to 4 carbon atoms which may be branched, and 1 is an integer of 1 to 3.

Provided are a resin molded body and applications thereof. The resin molded body includes a resin layer containing a resin and a compound represented by Formula (1), and on at least one surface of the resin layer, a protective layer that contains at least one substance selected from the group consisting of urethane resin, acrylic resin, and polysiloxane. In Formula (1), Het.sup.1 represents a divalent 5-membered or 6-membered aromatic heterocyclic residue. X.sup.a, X.sup.b, X.sup.c, and X.sup.d each independently represent a hetero atom, and Y.sup.a, Y.sup.b, Y.sup.c, Y.sup.d, Y.sup.e, and Y.sup.f each independently represent a hetero atom or a carbon atom. A ring bonded to Het.sup.1 may have a double bond at any position.

Stabilised and aquated polymeric silicate compositions are described in which the compositions are poorly condensed compositions in which the silicates are resorbable and are capable of undergoing efficient dissolution to provide bioavailable soluble silicic acid. In particular, stabilised and aquated polymeric silicates are described that are capable of intravenous delivery, useful in the treatment of cancer or systemic infection, or for topical administration, e.g. in the form of a solid or semi-solid ointment useful in the treatment of wounds or the prevention of bacterial infection.

Stabilised and aquated polymeric silicate compositions are described in which the compositions are poorly condensed compositions in which the silicates are resorbable and are capable of undergoing efficient dissolution to provide bioavailable soluble silicic acid. In particular, stabilised and aquated polymeric silicates are described that are capable of intravenous delivery, useful in the treatment of cancer or systemic infection, or for topical administration, e.g. in the form of a solid or semi-solid ointment useful in the treatment of wounds or the prevention of bacterial infection.

The present invention aims to provide: a novel silicon-containing polymer that is alkali soluble or is soluble in an alkaline aqueous solution by using heat, etc.; a film-forming composition including the silicon-containing polymer; a method for forming a silicon-containing polymer coating using the film-forming composition; a method for forming a silica coating using the film-forming composition; and a production method for the silicon-containing polymer. The silicon-containing polymer including at least either a polysiloxane chain or oligosiloxane chain or a polysilane chain or oligosilane chain in the molecular chain thereof has a group that has e.g., a carboxy or carboxylic acid ester group and a sulfide group, introduced to the molecular chain as a result of an ene-thiol reaction.

A method for synthesizing a pre-hydrolyzed polysilicate, wherein a polysilicate is applied as a reactant when synthesizing the pre-hydrolyzed polysilicate, and the total amount of water added in the reaction system is specified. The method is capable of omitting a condensation reaction by applying a polysilicate as a reactant, thereby significantly shortening synthesis time and reducing production costs when compared with a typical synthesis method in which alkoxysilane-based monomer compound is used as a reactant. In addition, the gelation reaction time and the weight average molecular weight can be easily controlled, and a pre-hydrolyzed polysilicate excellent in storage stability and processability can be synthesized.

A method for synthesizing a pre-hydrolyzed polysilicate, wherein a polysilicate is applied as a reactant when synthesizing the pre-hydrolyzed polysilicate, and the total amount of water added in the reaction system is specified. The method is capable of omitting a condensation reaction by applying a polysilicate as a reactant, thereby significantly shortening synthesis time and reducing production costs when compared with a typical synthesis method in which alkoxysilane-based monomer compound is used as a reactant. In addition, the gelation reaction time and the weight average molecular weight can be easily controlled, and a pre-hydrolyzed polysilicate excellent in storage stability and processability can be synthesized.

The current disclosure provides reinforced aerogel compositions that are durable and easy to handle, have favorable performance in aqueous environments, have favorable insulation properties, and have favorable, reaction to fire, combustion and flame-resistance properties. Also provided are methods of preparing or manufacturing such reinforced aerogel compositions. In certain embodiments, the composition has a silica-based aerogel framework, reinforced with an open-cell macroporous framework, and includes one or more fire-class additives, where the silica-based aerogel framework comprises at least one hydrophobic-bound silicon and the composition or each of its components has desired properties.