Claims
- 1. A method for treating polymer particles with a dispersion in water of one or more meltable polymer additives said method comprising
- contacting with an aqueous medium under conditions of agitation for a time to efficiently wet with water and form a dispersion the composition comprising:
- i) one or more water insoluble, meltable polymer additives, wherein substantially all of said polymer additives have a particle size of less than about 40 .mu.m,
- ii) at least one surfactant having a low hydrophobic-lipophobic balance value less than 9, wherein said surfactant is adsorbed on the surface of said water insoluble, meltable polymer additive particles, and
- iii) at least one surfactant having a high hydrophobic-lipophobic balance value of greater about 9,
- wherein said composition is in powder form having a particle size of about 5.0 to about 1000.0 .mu.m and contains about 2.0 to about 40.0 weight % of encapsulated water based on the total of said composition; and
- contacting the dispersion with polymer particles.
- 2. A method in accordance with claim 1 comprising the additional step of drying the resulting particles.
- 3. The method according to claim 1 wherein said polymer additives are selected from the group consisting of:
- thermal stabilizing agents,
- processing aids,
- colorants,
- antistatic agents,
- coupling agents,
- UV stabilizers,
- metal deactivators,
- nucleating agents, and
- flame retardants
- as well as mixtures of any two or more thereof.
- 4. The method according to claim 1 wherein said surfactant having a low hydrophobic-lipophobic balance value has a hydrophobic-lipophobic balance value which falls in the range of about 2 up to 8.
Parent Case Info
This application is a divisional application of copending application Ser. No. 07/956,532 filed Oct. 5, 1992, now U.S. Pat. No. 5,300,256, which is a divisional of application Ser. No. 07/513,389 filed Apr. 23, 1990, now U.S. Pat. No. 5,153,069, which is a continuation-in-part of application Ser. No. 07/392,759 filed Aug. 11, 1989, now U.S. Pat. No. 5,204,022.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4880470 |
Hyche et al. |
Nov 1989 |
|
5204022 |
Sharma |
Apr 1993 |
|
Divisions (2)
|
Number |
Date |
Country |
Parent |
956532 |
Oct 1992 |
|
Parent |
513389 |
Apr 1990 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
392759 |
Aug 1989 |
|