Ultra-high solids emulsion pressure sensitive adhesives and their applications
OwnerKenneth Lininventor
Life of this patent
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Abstract
A process for making an ultra high solids emulsion adhesive that is coatable and dryable at room temperature. The process consists of increasing solids using a phase inversion process to accomplish the addition of increased solids into aqueous formulations thereby obtaining emulsion pressure sensitive adhesives with solids content in excess of 60%.
Claims18
A process for preparing a ultra-high-solids aqueous based pressure sensitive adhesive comprising of:
- preparing a molten uniform oil phase formulation, comprising of a hydrophobic material and surfactants,
- slowly adding an oil-in-water water-based formulation to the said molten oil phase such that the added said oil-in-water water-based formulation forms an oil-in-water-in-oil emulsion while maintaining such a suspension by agitation,
- continue adding increasing quantity of the said oil-in-water water-based formulation to the said formed oil-in-water-in-oil suspension until the oil-in-water-in-oil suspension inverts to an oil-in-water suspension with both types of oil phase particles co-existing in the continuous water phase of the suspension,
- optionally adding additional amounts of the said oil-in-water water-based formulation to bring the % solids of the formed oil-in-water suspension to the solids level desired.
The process of 14 where in the printer paper is pre-perforated so that the cutting step involves a tearing at perforations.
A room temperature coatable and dryable high solids emulsion adhesive made by steps comprising:
- preparing a molten uniform oil phase formulation, comprising of a hydrophobic material and surfactants,
- slowly adding a water-based formulation to the said molten oil phase such that the added said water-based formulation forms a water-in-oil suspension while maintaining such a suspension by agitation,
- continue adding increasing quantity of the said water-based formulation to the said formed water-in-oil suspension until the water-in-oil suspension inverts to an oil-in-water suspension,
- optionally adding additional amount of the said water-based formulation to bring the % solids of the formed oil-in water suspension to the solids level desired.
A process for preparing an ultra high-solids aqueous based pressure sensitive adhesive comprising of:
- preparing a molten uniform oil phase formulation, comprising of a hydrophobic material and surfactants,
- slowly adding an emulsion to the said molten oil phase such that the added said emulsion forms a water-in-oil emulsion while maintaining such a suspension by agitation,
- continue adding increasing quantity of the said emulsion to the said formed water-in-oil suspension until the water-in-oil suspension inverts to an oil-in-water suspension,
- optionally adding additional amount of the said emulsion or any other different emulsion to bring the % solids of the formed oil-in-water suspension to the solids level desired.
Dependencies are inferred from the claim text.