Semisolid water-based coating compositions

In a gelled coating composition capable of application and flow on a solid substrate, comprising:

• (a) a water reducible film-forming polymer which is an electrolyte,
• (b) water,
• (c) a colloidal gelling agent, gelable by interaction with said electrolyte, in an amount sufficient, when substantially interacted with said electrolyte, to gel the composition to form a stable semisolid or solid and to provide a composition reducible to a coating application viscosity upon application of a relatively small shearing force, at a relatively small shearing rate,
• (d) which gelled coating composition, after being sheared to a coating application viscosity, does not recover substantial colloidal gelling agent-electrolyte contributed gel structure,
• the improvement which comprises said composition additionally containing an amount of at least one gel structure formation rate increasing compound which corresponds or is hydrolyzable in situ to effectively provide at least one compound which corresponds to the formula:
• R.sub.x M(OH).sub.y-x
• where M is selected from boron, aluminum, silicon, tin, titanium, zirconium, vanadium, niobium, hafnium and tantalum;
• x is 0 or 1;
• y is the valence of M;
• and R is an organic moiety attached to M through a carbon-M bond;
• condensate thereof;
• or a combination thereof;
• said amount being an amount sufficient to decrease the time required to form said gelled composition.

In a method of forming a gelled coating composition capable of application and flow on a solid substrate, which coating composition, after being sheared to a coating application viscosity, does not recover substantial colloidal gelling agent-electrolyte contributed gel structure, which method comprises admixing with a preformed water-based coating composition:

• an electrolyte, and a colloidal gelling agent, gelable by interaction with said electrolyte in an amount sufficient, when substantially interacted with said electrolyte, to gel the composition to form a stable semisolid or solid, and to provide a composition reducible to a coating application viscosity upon the application of a relatively small shearing force, at a relatively small shearing rate, the improvement which comprises adding to the composition, prior to gel formation, an amount of at least one gel structure formation rate increasing compound which corresponds or is hydrolyzable in situ to effectively provide at least one compound which corresponds to the formula:
• R.sub.x M(OH).sub.y-x
• where M is selected from boron, aluminum, silicon, tin, titanium, zirconium, vanadium, niobium, hafnium and tantalum;
• x is 0 or 1;
• y is the valence of M;
• and R is an organic moiety attached to M through a carbon-M bond;
• condensate thereof;
• or a combination thereof;
• said amount being an amount sufficient to decrease the time required to form said gelled composition.

In a method of forming a gelled coating composition capable of application and flow on a solid substrate, which coating composition, after being sheared to a coating application viscosity, does not recover substantial colloidal gelling agent-electrolyte contributed gel structure, which method comprises admixing with a preformed water-based coating composition, containing an electrolyte:

• a colloidal gelling agent, gelable by interaction with said electrolyte, in an amount sufficient, which substantially interacts with said electrolyte, to gel the composition to form a viscosity stable semisolid or solid, and to provide a composition reducible to a coating application viscosity upon the application of a relatively small shearing force, at a relatively small shearing rate, the improvement which comprises adding to the composition, prior to gel formation, an amount of at least one gel structure formation rate increasing compound which corresponds or is hydrolyzable in situ to effectively provide at least one compound which corresponds to the formula:
• R.sub.x M(OH).sub.y-x
• where M is selected from boron, aluminum, silicon, tin, titanium, zirconium, vanadium, niobium, hafnium and tantalum;
• x is 0 or 1;
• y is the valence of M;
• and R is an organic moiety attached to M through a carbon-M bond;
• condensate thereof;
• or a combination thereof;
• said amount being an amount sufficient to decrease the time required to form said gelled composition.

In a method of forming a gelled coating composition cable of application and flow on a solid substrate, which coating composition, after being sheared to a coating viscosity, does not recover substantial colloidal gelling agent-electrolyte contributed gel structure, which method comprising admixing with a water-based coating composition during the formulation of its ingredients:

• an electrolyte, and a colloidal gelling agent, gelable by interaction with said electrolyte, in an amount sufficient, when substantially interacts with said electrolyte, to gel the composition to form a stable semi-solid or solid and to provide a composition reducible to a coating application viscosity upon the application of a relatively small shearing force, at a relatively small shearing rate, the improvement which comprises adding to the composition, prior to gel formation, an amount of at least one gel structure formation rate increasing compound which corresponds or is hydrolyzable in situ to effectively provide at least one compound which corresponds to the formula:
• R.sub.x M(OH).sub.y-x
• where M is selected from boron, aluminum, silicon, tin, titanium, zirconium, vanadium, niobium, hafnium and tantalum;
• x is 0 or 1;
• y is the valence of M;
• and R is an organic moiety attached to M through a carbon-M bond;
• condensate thereof;
• or a combination thereof;
• said amount being an amount sufficient to decrease the time required to form said gelled composition.

In a method of forming a gelled coating composition capable of application and flow on a solid substrate, which coating composition, after being sheared to a coating viscosity, does not recover substantial colloidal gelling agent-electrolyte contributed gel structure, which method comprises admixing with a water-based coating composition, comprising a film-forming polymeric electrolyte, during the formulation of its ingredients:

• a colloidal gelling agent, gelable by interaction with said electrolyte, in an amount sufficient, when substantially interacted with said electrolyte, to gel the composition to form a stable semisolid or solid and to provide a composition reducible to a coating application viscosity upon the application or a relatively small shearing force, at a relatively small shearing rate, the improvement which comprises adding to the composition, prior to gel formation, an amount of at least one gel structure formation rate increasing compound which corresponds or is hydrolyzable in situ to effectively provide at least one compound which corresponds to the formula:
• R.sub.x M(OH).sub.y-x
• where M is selected from boron, aluminum, silicon, tin, titanium, zirconium, vanadium, niobium, hafnium and tantalum, x is 0 or 1;
• y is the valence of M;
• and R is an organic moiety attached to M through a carbon-M bond;
• condensate thereof;
• or a combination thereof;
• said amount being an amount sufficient to degrease the time required to form said gelled composition.