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 disclosure is directed to compositions and methods for coating, particularly protecting and optionally cleaning, metallic surfaces, and articles containing such surfaces.

The present disclosure is directed to compositions and methods for coating, particularly protecting and optionally cleaning, metallic surfaces, and articles containing such surfaces.

A foam control composition includes a component (A) and a component (B). Component (A) includes units of the formula [SiO.sub.4/2].sub.a[(R.sup.1O)SiO.sub.3/2].sub.b[(R.sup.2O)SiO.sub.3/2].sub.b[(R.sup.1O).sub.2SiO.sub.2/2].sub.c[(R.sup.1O)(R.sup.2O)SiO.sub.2/2].sub.c[(R.sup.2O).sub.2SiO.sub.2/2].sub.c[(R.sup.1O).sub.3SiO.sub.1/2].sub.d[(R.sup.1O).sub.2(R.sup.2O)SiO.sub.1/2].sub.d[(R.sup.1O)(R.sup.2O).sub.2SiO.sub.1/2].sub.d[(R.sup.2O).sub.3SiO.sub.1/2].sub.d. Component (B) comprises a filler.

A foam control composition includes a component (A) and a component (B). Component (A) includes units of the formula [SiO.sub.4/2].sub.a[(R.sup.1O)SiO.sub.3/2].sub.b[(R.sup.2O)SiO.sub.3/2].sub.b[(R.sup.1O).sub.2SiO.sub.2/2].sub.c[(R.sup.1O)(R.sup.2O)SiO.sub.2/2].sub.c[(R.sup.2O).sub.2SiO.sub.2/2].sub.c[(R.sup.1O).sub.3SiO.sub.1/2].sub.d[(R.sup.1O).sub.2(R.sup.2O)SiO.sub.1/2].sub.d[(R.sup.1O)(R.sup.2O).sub.2SiO.sub.1/2].sub.d[(R.sup.2O).sub.3SiO.sub.1/2].sub.d. Component (B) comprises a filler.

A moisture curable silylated composition comprising: a polymer (A) comprising at least 2 alkoxysilyl terminal groups of formula (I):

##STR00001## wherein R.sup.1 represents a hydrocarbon-based divalent radical comprising from 5 to 15 carbon atoms; R.sup.2 represents a C.sub.2-C.sub.4 alkylene; R.sup.3 represents a C.sub.1-C.sub.6 alkylene; R.sup.4 and R.sup.5 each represent a C.sub.1-C.sub.4 alkyl; R.sup.6 represents H or a radical comprising 1 to 6 carbon atoms; n is an integer such that Mw of the block of formula [OR.sup.2].sub.n is 300 to 40000 g/mole; m is an integer different from 0 such that the Mw of the polymer (A) is between 500 to 50000 g/mole, and p is an integer equal to 0, 1 or 2; a polymer (B) comprising at least 2 alkoxysilyl terminal groups of formula (II):

##STR00002##

wherein R.sup.2, R.sup.4, R.sup.5, n and p are such as defined for formula (I); and an alkoxy modified silsesquioxane (C).

A moisture curable silylated composition comprising: a polymer (A) comprising at least 2 alkoxysilyl terminal groups of formula (I):

##STR00001## wherein R.sup.1 represents a hydrocarbon-based divalent radical comprising from 5 to 15 carbon atoms; R.sup.2 represents a C.sub.2-C.sub.4 alkylene; R.sup.3 represents a C.sub.1-C.sub.6 alkylene; R.sup.4 and R.sup.5 each represent a C.sub.1-C.sub.4 alkyl; R.sup.6 represents H or a radical comprising 1 to 6 carbon atoms; n is an integer such that Mw of the block of formula [OR.sup.2].sub.n is 300 to 40000 g/mole; m is an integer different from 0 such that the Mw of the polymer (A) is between 500 to 50000 g/mole, and p is an integer equal to 0, 1 or 2; a polymer (B) comprising at least 2 alkoxysilyl terminal groups of formula (II):

##STR00002##

wherein R.sup.2, R.sup.4, R.sup.5, n and p are such as defined for formula (I); and an alkoxy modified silsesquioxane (C).

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.

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.

In various embodiments, novel methods of fabricating and/or packaging aerogels are provided.