Play Composition Including Crosslinkable Binder
AssigneeMattel, Inc.
InventorAbimael CORDOVA
Life of this patent
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Abstract
The present invention is directed toward water based play compositions including a crosslinkable network polymer and a crosslinking system effective to crosslink the polymer. The crosslinking system is a water-soluble salt complex including a primary crosslinking agent, a secondary crosslinking agent, and a tertiary crosslinking agent. The crosslinking system contains a diminished amount of boron compounds while remaining effective in crosslinking network polymers including polyvinyl alcohol (to form moldable dough compositions) and guar gum (to form hydrogels).
Claims20
A flowable play gel composition comprising:
- water;
- a binder;
- and
- a crosslinking system to crosslink the binder, the crosslinking system comprising:
- a primary crosslinking agent comprising a first alkali metal salt, and
- a secondary crosslinking agent comprising a second alkali metal salt, wherein the crosslinking density generated in the binder by the secondary crosslinking agent is less than the crosslinking density generated in the binder by the primary crosslinking agent, and
- a tertiary crosslinking agent that is present in an amount of about 0.50% or less by weight of the gel composition;
- wherein the crosslinking system and the binder cooperate to form a hydrogel including a polymer network expanded throughout its volume by the water.
A moldable dough composition comprising:
- water;
- a binder;
- and
- a crosslinking system to crosslink the binder, the crosslinking system comprising:
- a primary crosslinking agent comprising a first alkali metal salt, wherein the primary crosslinking agent generates a first crosslink density in the binder, and
- a secondary crosslinking agent comprising a second alkali metal salt, wherein the secondary crosslinking agent generates a second crosslink density in the binder, and
- a tertiary crosslinking agent that is present within the composition in an amount of 0.50 wt % or less,
- wherein the first crosslink density generated by the first crosslinking agent is greater than the second crosslink density generated by the secondary crosslinking agent.
A crosslinking system to crosslink a polymeric binder within a play composition, the crosslinking system comprising:
- a primary crosslinking agent selected from the group consisting of an alkali metal bicarbonate and a salt of a phosphoric acid, wherein the primary crosslinking agent generates a first crosslink density in the binder;
- a secondary crosslinking agent comprising an alkali metal carbonate, wherein the secondary crosslinking agent generates a second crosslink density in the binder, and
- a tertiary crosslinking agent that generates a third crosslink density in the binder,
- wherein the crosslinking system crosslinks the polymeric binder forming the play composition, and wherein the first crosslink density is greater than both the second crosslink density and the third crosslink density.
Dependencies are inferred from the claim text.