Solid-form additive systems dispersible in aqueous media
AssigneeEastman Kodak Company
InventorMahendra K. Sharma
Life of this patent
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Abstract
Solid form additive systems which are dispersible in aqueous media are disclosed, as are methods for preparing such additive systems and methods for dispersing such additive systems in aqueous media. Also disclosed are methods for applying additives to polymeric particles and the polymeric particles treated by such methods.
Claims47
A method for rendering one or more meltable polymer additives and, optionally, one or more higher melting polymer additives, dispersible in aqueous media, said method comprising:
- a) heating said additives to a temperature sufficient to produce a melt phase,
- b) combining the resulting melt phase, at a temperature sufficient to maintain a melt phase, with at least one surfactant having a low hydrophobic-lipophobic balance value of less than about 9 and at least one surfactant having a high hydrophobic-lipophobic balance value of greater than about 9, wherein said combining is carried out under sufficient agitation to provide a homogeneous mixed melt, and
- c) allowing the resulting blend obtained from step (b) to cool so as to obtain a water dispersible solid material.
A method for rendering one or more meltable polymer additives and, optionally, one or more higher melting polymer additives, dispersible in aqueous media containing at least one surfactant having a high hydrophobic-lipophobic balance value of greater than about 9, said method comprising:
- a) heating said additives to a temperature sufficient to produce a melt phase of at least the lowest melting of said additives,
- b) combining the resulting melt phase, at a temperature sufficient to maintain a melt phase, with at least one surfactant having a low hydrophobic-lipophobic balance value of less than about 9, wherein said combining is carried out under sufficient agitation to provide a homogeneous mixed melt, and
- c) allowing the resulting blend obtained from step (b) to cool so as to obtain a water dispersible solid material.
Dependencies are inferred from the claim text.