Aqueous application of additives to polymeric particles
AssigneeEastman Chemical Company
InventorKenneth Raymond Walker
Life of this patent
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Abstract
An aqueous composition and method for applying additives to polymeric particles includes a water-dissipatable polyester derived from a dicarboxylic acid component and a diol component and a difunctional monomer containing a SO3M moiety attached to an aromatic nucleus to at least partially disperse the additive. A method for dispersing a hydrophobic additive in an aqueous media includes the step of contacting the hydrophobic additive with an effective amount of the water-dissipatable polyester to form a mixture and agitating the mixture sufficiently to produce a homogenous blend is also described.
Claims7
A method for surface coating additives to polymeric particles comprising the steps of:
- a) providing an aqueous composition comprising:
- i) a hydrophobic additive for coating at least a portion of said polymeric particle selected from the group consisting of coupling agents, antistatic agents, nucleating agents, metal deactivators, lubricants, slip agents, antiblocking agents, and mixtures thereof;
- ii) from about 5 to about 50 weight % of a water-dissipatable polyester derived from a dicarboxylic acid component and a diol component and a difimctional monomer containing a SO3M group attached to an aromatic nucleus to at least partially disperse said additive, wherein M is selected from the group consisting of is hydrogen, Na+, Li+, K+, Mg++, Ca++, Cu++, Fe++, Fe+++, or a combination thereof;
- and
- iii) from about 5 weight % to about 95 weight % water, wherein said percentages are based on the total weight of the components i-iii;
- b. contacting said polymeric particles with said aqueous composition;
- and
- c. drying the resulting polymeric particles, and wherein said polymeric particles have a surface energy of from about 25 dynes/cm to about 45 dynes/cm.
A method for surface coating tacky polymeric particles with antiblocking agents comprising the steps of:
- a) providing an aqueous composition comprising:
- i) an antiblocking additive selected from the group consisting of clay, calcium stearate and mixtures thereof;
- ii) from about 5 to about 50 weight % of a water-dissipatable polyester derived from a dicarboxylic acid component and a diol component and a difunctional monomer containing a SO3M group attached to an aromatic nucleus to at least partially disperse said additive, wherein M is selected from the group consisting of is hydrogen, Na+, Li+, K+, Mg++, Ca+, Cu++, Fe++, Fe+, or a combination thereof;
- and
- iii) from about 5 weight % to about 95 weight % water, wherein said percentages are based on the total weight of the components i-iii;
- b. contacting said polymeric particles with said aqueous composition;
- and
- c. drying the resulting polymeric particles, and wherein said polymeric particles have a surface energy of from about 25 dynes/cm to about 45 dynes/cm.
Dependencies are inferred from the claim text.