BioSciences - Polysciences, Inc.

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Additional Particles
Biodegradable Particles
Microspheres & Particles
Poly(Lactic Acid-co-Glycolic Acid) Uniform Dry Microspheres
We offer microspheres comprised of two PLGA polymer ratios (50:50 and
75:25 Lactic Acid : Glycolic Acid) in three narrow sizes (75µm, 100µm and
120µm; 5-10% CVs). These highly uniform particle populations serve as
excellent models for controlled degradation rate measurements, and for
the development of prototype scaffolds or devices.
Microdispers and DispersEZ PTFE Particles
For more information please call (800) 523-2575 or visit: polysciences.com
Catalog # Size
Composition - LA/GA Size Range Mol. Weight
50:50 70-80µm ~150,000 25401-100 100 mg
25401-250 250 mg
25401-500 500 mg
50:50 95-105µm ~150,000 25402-100 100 mg
25402-250 250 mg
25402-500 500 mg
50:50 115-125µm ~150,000 25403-100 100 mg
25403-250 250 mg
25403-500 500 mg
75:25 70-80µm ~90,000 25398-100 100 mg
25398-250 250 mg
25398-500 500 mg
75:25 95-105µm ~90,000 25399-100 100 mg
25399-250 250 mg
25399-500 500 mg
75:25 115-125µm ~90,000 25400-100 100 mg
25400-250 250 mg
25400-500 500 mg
This novel patented class of polytetrafluoroethylene (PTFE) particles are available in two types. Microdispers
particles are provided in a dry powder form and DispersEZ self-stabilized fluoro particles
(SSFP) are supplied as a 30% suspension in water or as a solid. These particles range in size from
200nm to 10µm. (Teflon ® Nanopowder)
DispersEZ-300 [9002-84-0] H4g
A novel patented class of polytetrafluoroethylene particles, our unique DispersEZ particles have
chemically treated surfaces to orient stabilizing polar moieties (both hydroxyl and carboxylic acid
groups) to the exterior of the particle. These molecules, which are chemically grafted to the PTFE surface,
allow the particles to disperse easily in both aqueous and solvent media without the need for
added surfactants or stabilizers that can interfere with desired properties. The carboxyl and hydroxyl
moieties on the surface of the DispersEZ particles act as synthetic handles to which a variety of
chemical species can be attached. Groups such as esters, isocyanates, halogens, aldehydes, ethers
and epoxides can be formed with the appropriate reagents, under the proper conditions. Similarly,
the surface carboxyl groups can be derivitized with esters and amides. Applications for DispersEZ
particles range from solid phase synthesis supports to bioreagents for diagnostic assays.
OH
Mean Particle Size 200-300nm
Surfactant Demand None (self-stabilized added surfactant)
Surfactant Reactivity High (concentration of accessible reactive sites versus traditional PTFE beads)
24339-50 50 g
Microdispers-200 [9002-84-0] H4g
Polytetrafluoroethylene (PTFE) particles provided in dry powder form. These particles require far less
added dispersant than traditional PTFE particles to form stable dispersions. Useful for many applications
including coatings, gloss reducers and coating additives that impact water pickup or surface
energy. With good powder flow properties, these particles are easily compounded in a number of
thermoplastic matrices with appropriate heat/shear mixing.
HOOC COOH
Mean Particle Size 200-300nm 24333-100 100 g
OH
HOOC OH
OH OH
COOH
COOH