An anti-static thermoplastic resin composition of 90-99.95 weight % of a thermoplastic resin and correspondingly 10 to 0.05 weight % of a halogenated carbon sulfonic acid salt of a polysubstituted phosphonium compound such as a fluorinated phosphonium sulfonate and wherein the thermoplastic resin is either an aromatic polycarbonate, polyetherimide, polyester, polyphenylene ether, polyphenylene ether/styrene polymer blend, polyamide, polyketone, acrylonitrile-butadiene-styrene, blends thereof and blends thereof with other materials. Preferably the thermoplastic resin is a transparent aromatic polycarbonate.

FIELD OF THE INVENTION
 This invention is related to an anti-static resin composition particularly
 transparent resins compositions comprising a thermoplastic polymer and a
 halogenated carbon sulfonic acid salt of a polysubstituted phosphonium
 compound and to a halogenated carbon sulfonic acid salt of a
 polysubstituted phosphonium compound.
 BACKGROUND OF THE INVENTION
 Many polymers or blends of polymers are relatively non-conductive. As such,
 this can result in a static charge build-up during processing and use of
 the polymer. The charged polymer molded parts can attract dust, which are
 small particles, and can thus interfere with a smooth surface appearance.
 The attracted particles to the surface of a molded article may also cause
 a decrease in the transparency of the article. In addition, the
 electrostatic charge can be a serious obstacle in the production process
 of such polymers. In the past, electrically conductive agents such as
 carbon and metallic particles or surfactants were used in various attempts
 to reduce electrostatic charges of synthetic macromolecular materials by
 mixing them internally together or by coating the material with an agent.
 These methods employing electrically conductive agents are not generally
 feasible for many reasons such as the large amount of agents which must be
 usually used, the difficulty in adding them to the material, the
 difficulty in obtaining a transparent product or retention of mechanical
 and rheological properties, if that is the case, and the high cost of such
 conductive agents. Thus, these agents can be used only in limited
 situations.
 Anti-static agents are materials which are added to polymers to reduce
 their tendency to acquire an electrostatic charge, or when a charge is
 present, these anti-static agents promote the dissipation of such a
 charge. The anti-static agents are usually hydrophilic or ionic in nature.
 When present on the surface of polymeric materials, they facilitate the
 transfer of electrons and thus eliminate the build up of a static charge.
 Anti-static agents have been applied in two ways. One method uses external
 anti-static agents that are applied by spraying the surface or dipping of
 the polymeric material. The second method uses internal anti-static
 agents, which are added to the polymer before processing. It is necessary
 for anti-static agents applied in this manner that they are thermally
 stable and able to migrate to the surface during processing.
 Since there are many anti-static agents having surfactants as their main
 constituent, appropriate ones may be selected therefrom according to the
 situation. In fact, many of the types to be internally added have been
 considered and tried. When used as an internally-applied anti-static
 agent, however, anionic surfactants are difficult to handle because they
 are inferior in compatibility and uniform dispersibility and tend to
 decompose or deteriorate when heated. Cationic surfactants containing
 quarternary nitrogen in their molecules and amphoteric surfactants, on the
 other hand, can be used only in limited situations because they are
 extremely poor in heat resistance, although their anti-static
 characteristics are good. As for non-ionic surfactants, they are
 relatively superior to the aforementioned ionic surfactants regarding
 compatibility with synthetic macromolecular materials, but tend to be weak
 in anti-static characteristics and their effects disappear with time at
 normal or high temperatures. Moreover, because of the limited thermal
 stability of these non-ionic surfactant anti-static agents, their use with
 engineering thermoplastic resins, such as aromatic polycarbonates, is also
 limited due to the temperatures at which such resins are processed. Thus,
 these types of surfactants adversely affect the optical properties of
 aromatic polycarbonates. Although metal salts of organic sulfonic acids
 have been reported, especially as internally applied anti-static agents
 for polycarbonates and polyester resins which are molded at high
 temperatures, they are not sufficient in compatibility with resins or heat
 resistance one adverse consequence of insufficient compatibility is that
 transparency characteristics of certain macromolecular materials such as
 polycarbonates are lost with such anti-static agents. There has also been
 a report of using phosphonium salts or organic sulfonic acids having
 halogen substituent as a flame retardant (U.S. Pat. No. 4,093,589), but
 they are not to be expected to serve as anti-static agents as well.
 Another patent discloses reducing the static charge on polycarbonate
 resins. This is U.S. Pat. No. 4,943,380, which discloses an anti-static
 composition containing 90-99.9 weight % of polycarbonate and 0.1-10 weight
 % of a heat resistant phosphonium sulfonate having the general formula:
 ##STR1##
 where R is a straight or branched chain alkyl group having from 1 to 18
 carbon atoms; R.sub.1, R.sub.2 and R.sub.3 are the same, each being an
 aliphatic hydrocarbon with 1-18 carbon atoms or an aromatic hydrocarbon
 group; and R.sub.4 is a hydrogen group with 1-18 carbon atoms. The
 corresponding cationic surfactants containing quarternary nitrogen in
 their molecules can only be used in limited situations, because they are
 extremely poor in heat resistance although their anti-static
 characteristics are good (U.S. Pat. No. 5,468,973).
 SUMMARY OF THE INVENTION
 It is, therefore, an object of this invention to provide an anti-static
 resin composition comprising such polymers as polycarbonate,
 polyetherimide, polyester, polyphenylene ether/polystyrene blends,
 polyamides, polyketones, acrylonitrile-butadiene-styrene (ABS) or blends
 of these polymers or blends thereof with other materials or polymers, and
 a heat resistant anti-static material with which the aforementioned
 problems of conventional agents can be eliminated.
 It is another object of this invention to provide a new anti-static agent
 which can be internally added to a synthetic resin preferably having
 transparent characteristics in the molded state without adversely
 affecting the transparency and mechanical properties of the molded
 article. However, this invention is not limited to transparent
 thermoplastics since anti-static requirements are also applicable to
 pigmented or translucent molded thermoplastic polymer articles.
 DETAILED DESCRIPTION OF THE INVENTION
 Briefly, it has been discovered, according to the present invention, that
 relatively small quantities of certain heat resistant substituted
 phosphonium salts of medium and short chain halogenated fluorocarbon
 sulfonic acids of about 0.05-10 wt %, preferably about 0.2-1.5 wt %, and
 more particularly about 0.5-1.5 wt %, can be used as internal anti-static
 agents in polycarbonate, polyetherimide, polyester, polyphenylene
 ether/polystyrene blends, polyamides, polyketones, ABS or blends of these
 polymer resins of about 90-99.95 wt %, preferably about 98.5-99.8 wt % and
 more particularly about 98.5-99.5 wt %, the weight % based on the total
 weight of polymer and additive. In general, the substituted phosphonium
 salts of the medium and short chain sulfonic acids have the general
 formula:
 ##STR2##
 wherein X is independently selected from halogen or hydrogen provided that
 at least one (1) X is halogen; n, m and p are integers from 0 to 12; and Y
 is zero or a heterocyclic atom, other than carbon, of an atomic ring and
 is either nitrogen, oxygen, sulfur, selenium, phosphorus, arsenic, and the
 like; R.sub.1, R.sub.2, and R.sub.3 are the same, each having an aliphatic
 hydrocarbon radical with 1-8 carbon atoms or an aromatic hydrocarbon
 radical of 6-12 carbon atoms and R.sub.4 is a hydrocarbon radical with
 1-18 carbon atoms. The halogens may be independently selected from
 bromine, chlorine, fluorine and iodine. Preferably, the halogen is
 fluorine.
 The phosphonium sulfonate is preferably fluorinated phosphonium sulfonate
 and is composed of a fluorocarbon containing an organic sulfonate anion
 and an organic phosphonium cation. Examples of such organic sulfonate
 anions include perfluoro methane sulfonate, perfluoro butane sulfonate,
 perfluoro hexane sulfonate, perfluoro heptane sulfonate and perfluoro
 octane sulfonate. Examples of the aforementioned phosphonium cation
 include aliphatic phosphonium such as tetramethyl phosphonium, tetraethyl
 phosphonium, tetrabutyl phosphonium, triethylmethyl phosphonium,
 tributylmethyl phosphonium, tributylethyl phosphonium, trioctylmethyl
 phosphonium, trimethylbutyl phosphonium trimethyloctyl phosphonium,
 trimethyllauryl phosphonium, trimethylstearyl phosphonium, triethyloctyl
 phosphonium and aromatic phosphoniums such as tetraphenyl phosphonium,
 triphenylmethyl phosphonium, triphenylbenzyl phosphonium, tributylbenzyl
 phosphonium.
 The fluorinated phosphonium sulfonate of the present invention can be
 obtained by any combination of any of these organic sulfonate anions and
 organic cations but this invention is not limited by the examples given
 above. Fluorinated phosphonium sulfonate may be produced in a very pure
 form by mixing the corresponding sulfonic acid and the quarternary
 phosphonium hydroxide in a solvent mixture followed by evaporation of the
 solvent mixture. Tetrabutyl phosphonium perfluoro butane sulfonate, for
 example, can be produced with a yield of about 95% by placing 98.6 g. of
 perfluoro butane sulfonic acid, 200 ml. of a 40 wt. % solution of
 tetrabutyl phosphonium hydroxide and a 500 ml of a solvent mixture in a
 flask, stirring the mixture for one hour at room temperature, isolating
 phosphonium sulfonate which separates as an oily layer, washing it with
 100 ml of water, followed by evaporation of the solvents using a vacuum
 pump.
 As stated the preferred phosphonium sulfonate employed herein is a
 fluorinated phosphonium sulfonate having the general formula:
 ##STR3##
 wherein F is fluorine; n is an integer of from 1-12, S is sulfur; R.sub.1,
 R.sub.2 and R.sub.3 are the same, each having an aliphatic hydrocarbon
 radical of 1-8 carbon atoms or an aromatic hydrocarbon radical of 6-12
 carbon atoms and R.sub.4 is a hydrocarbon radical of 1-18 carbon atoms.
 Anti-static compositions comprising fluorinated phosphonium sulfonate
 shown by formula (3) having the principle component thereof can be used in
 many different ways to make use of their anti-static and compatibility
 characteristics and heat resistance in providing such anti-static
 characteristics to polycarbonate, polyetherimide, polyester, polyphenylene
 ether/polystyrene blends, polyamides, polyketones, ABS or blends of these
 polymers. The phosphonium fluorocarbon sulfonate salts to this invention
 are low melting semi-solid materials, and as such, they can be handled as
 a molten liquid. Some embodiments in the present invention are solid
 crystalline materials at room temperature (15-25.degree. C.) and are easy
 to weigh, handle, and add to the polycarbonate, polyetherimide, polyester,
 polyphenylene ether/polystyrene blends, polyamides, polyketones, ABS or
 blends of these polymers.
 A common way to practice this method is to add the agent directly and to
 mix it at the time of polymer production or fabrication. It can be
 processed by conventional means, including extrusion, injection, moulding,
 compression moulding or casting. The quantity of the phosphonium
 fluorocarbon sulfonate salt added to polycarbonate, polyetherimide,
 polyester, polyphenylene ether/polystyrene blends, polyamides,
 polyketones, ABS or blends of these polymers is an amount effective to
 reduce or eliminate a static charge and can be varied over a range. It has
 been found that if too little of the anti-static substituted phosphonium
 fluorocarbon sulfonate salt is added to the resin, there still may be a
 tendency for static charge to build up on the article made of the resin.
 If the loadings of the anti-static additive become too high, the addition
 of these quantities is uneconomical, and at some level it may begin
 adversely to affect other properties of the resin. For example, in order
 to obtain a favorable result by such an internal application method in
 transparent polycarbonate grades, it is preferable to add an agent of the
 present invention at the rate of 0.1-1.5 wt % with respect to the molding
 composition and it is even more preferable to do so at the rate of 0.4-0.8
 wt %. Antistats of the present invention are more strongly resistant
 against heat and can be added in lower quantities than the conventional
 ionic surfactants, e.g. phosphonium alkyl sulfonates, and the resin
 compositions have good transparency and mechanical properties.
 DETAILED DESCRIPTION OF THE EXAMPLES
 This invention can be further described by means of the following Examples.
 It should be understood, however, that this invention shall in no way be
 restricted by these Examples. In the Examples where comments are in terms
 of percent, they are percent by weight.
 The following two test procedures were employed to analyze samples for
 anti-static behavior. These were the Dust Attraction test, static charge
 measurements and the surface resistivity by static charge measurement.
 Dust Attraction Test
 Dust attraction in transparent polycarbonate articles was developed. In
 this procedure, several color plaques are put in an exicator which is
 saturated with an in situ prepared NH.sub.4 Cl dust for 60 minutes. The
 dust chamber is equilibrated for 1 hour before the samples are inserted.
 After 1 hour, the samples are removed and pictures of the color plaques
 together with the reference material are made using a projector lamp as a
 light source. The plaques are visually analyzed for appearance against a
 polycarbonate reference plaque containing no anti-static agent.
 Surface Resistivity
 Surface resistivity measurements were made at 55.degree. C. because at room
 temperature resistivity values have values in the range of 10.sup.17
 -10.sup.18 Ohm, in which range accurate results are difficult to obtain.
 Therefore, at a temperature of 55.degree. C., resistivity values have
 values in the range of 10.sup.13 -10.sup.14 Ohm.
 In addition to the above tests, the following tests were also conducted:

Yellowness Index (YI) - determined in
 accordance with
 ASTM 1925-63T.
 Transparency - determined in
 accordance with
 ASTM D-1003.
 Haze - determined in
 accordance with
 ASTM 1925 63T and
 ASTM D-1003.
 Melt Volume Rate - determined in
 accordance with
 ASTM - 1238.

EXAMPLE 1
 This Example describes the preparation of a fluorinated phosphonium
 sulfonate of this invention.
 Potassium perfluorobutylsulfonate was used as the starting material. The
 potassium (K.sup.+ ion) was first exchanged for a H.sup.+ ion using an ion
 exchange column (Rohm & Haas, Amberjet 1200 H). A second step employed in
 this procedure was an acid-base reaction using a fluorocarbon tail
 sulfonic acid and tetra butyl phosphonium hydroxide resulting in a high
 yield and high purity fluorinated phosphonium sulfonate. The reaction is
 as follows:
 ##STR4##
 tetrabutylphosphonium nonafluoro-1-butanesulfonate
 EXAMPLE 2
 This Example describes the preparation of a fluorinated phosphonium
 sulfonate of this invention.
 Potassium nona-fluoro-ethoxyethyl sulfonate was used as the starting
 material. The potassium (K.sup.+ ion) was first exchanged for a H.sup.+
 ion using an ion-exchange column (Rohm & Haas, Amberjet 1200 H). A second
 step employed in the procedure was an acid-base reaction using a
 fluorocarbon tail sulfonic acid and tetra butyl phosphonium hydroxide
 resulting in a high yield and high purity fluorinated phosphonium
 sulfonate.
 The compound obtained had the following formula:
 ##STR5##
 EXAMPLE 3
 This example describes the preparation of a fluorinated phosphonium
 sulfonate of this invention.
 Zonyl-TBS (DuPont), which is a mixture of different fluorocarbon containing
 sulfonic acids and fluorocarbon containing ammonium sulfonates was used as
 the starting material. The ammonium (NH.sup.+.sub.4 was first exchanged
 for an H.sup.+ - ion using an ion-exchange column (Rohm & Haas, Amberjet
 1200 H). A second step employed in the procedure was an acid base reaction
 using the mixture of fluorocarbon tail containing sulfonic acids and tetra
 butyl phosphonium hydroxide. The compound mixture obtained consisted of
 the following components wherein y is an integer of 1-9.
 ##STR6##
 EXAMPLE 4
 The anti-static properties of the fluorinated phosphonium sulfonate of
 Example 1 above was determined by first melt blending with anti-static
 agent a transparent aromatic polycarbonate resin having an intrinsic
 viscosity of about 0.46 deciliters per gram (dl/g) as measured in
 methylene chloride at 20.degree. C. In a twin screw extruder at a
 temperature of about 285.degree. C., extruded through a die orifice into
 strands which were quenched in water and then pelletized. The pellets were
 dried at about 125.degree. C. for about 2 hours. The dried pellets were
 injection molded into plaques of about 10 cm. square by about 2.5 mm.
 thick at an injection molding temperature of about 285.degree. C. using a
 single screw injection molding machine. Obviously, the temperature profile
 over the injection molding barrel was varied to an ultimate of about
 285.degree. C. In this Example, the barrel composition set forth in TABLE
 1 below was prepared under the same conditions as set forth above with the
 polycarbonate content varied with respect to the concentration of the
 anti-static agent present in each formulation. Each formulation also
 contained the same quantity of mold release agent, UV absorber,
 stabilizers, antioxidant and dye, the total of which was about 0.8 wt % of
 the polycarbonate employed. The results obtained were as follows:
 TABLE 1
 Surface MVR
 Anti-Static Resistivity Appearance (1.2 kg./
 Concentration (10.sup.14 Ohm Transparency Yellowness 300.degree. C.
 (%) at 55.degree. C. (%) Index Haze cm.sup.3 /10
 min.
 0 16.6 89.6 1.35 0.8 12.1
 0.2 6.13 89.4 1.30 0.9 12.4
 0.4 7.63 89.5 1.40 1.0 12.0
 0.5 7.95 89.6 1.50 0.8 11.9
 0.6 1.74 89.5 1.60 0.7 12.1
 0.8 0.26 89.7 1.45 0.8 12.3
 1.0 0.06 89.9 1.50 0.50 12.8
 1.5 0.004 89.0 1.70 0.65 13.6
 The results clearly show the excellent anti-static properties Of the
 composition Of this invention as shown by the results of surface
 resistivity and transparency without affecting transparency or color.
 EXAMPLE 5
 The formulations Of Example 4 were molded under abusive molding conditions
 i.e. the molding temperature of Example 4+20.degree. C. and a cooling time
 of 120 seconds compared to normal cooling time in Example 4 of 20 seconds.
 The results obtained were as follows:
 TABLE 2
 Surface
 Anti-Static Resistivity Appearance
 Concentration (10.sup.14 Ohm at Transparency Yellowness
 (%) (55.degree. C.) (%) Index Haze
 0 14.8 89.5 1.50 0.8
 0.2 18.8 89.4 1.40 0.85
 0.4 11.6 89.5 1.70 1.0
 0.5 0.85 89.7 1.70 0.75
 0.6 0.33 89.6 1.75 0.85
 0.8 0.015 89.7 1.50 0.7
 1.0 n.d. n.d. n.d. n.d
 1.5 n.d. n.d. n.d. n.d
 n.d. - not determined
 The results of injection molding of the same samples at different levels
 using abusive conditions (Temp. +20.degree. C. and cooling time=120 sec
 instead of 20 sec) are set forth in TABLE 2. Comparison of the results in
 TABLES 1 and 2 shows that if abusive molding conditions are used, the
 anti-static additive concentration in order to obtain anti-static
 polycarbonate is slightly reduced at loadings higher than 0.5%. This is a
 further indication of the improved surface seeking abilities of the
 anti-static additive of this invention at even higher processing
 temperatures. This was also confirmed for parts molded at abusive
 temperatures (+20.degree. C.) with the normal cycle time (t=20 sec). For
 samples molded using normal and abusive molding with a cycle time of 20
 sec using loadings of 0.6% anti-static concentration, the surface
 resistivity decreased from 1.74 (TABLE 1) to 0.33 (TABLE 2) respectively.
 These results clearly show the effect of the molding conditions of the
 surface resistivity behavior and that the surface seeking ability of the
 anti-static additive is temperature and cycle time dependent.
 EXAMPLE 6
 Example 4 was repeated except that the anti-static material employed was
 EPA-202, a phosphonium sulfonate of the prior art obtained from Takemoto
 Oil and Fat Co., LTD. The composition of EPA-202 has the following formula
 and is an anti-static composition of U.S. Pat. No. 4,943,380:
 ##STR7##
 The results obtained were as follows:
 TABLE 3
 Surface MVR
 Anti-Static Resistivity Appearance (1.2 kg./
 Concentration (10.sup.14 Ohm Transparency Yellowness 300.degree. C.
 (%) at 55.degree. C. (%) Index Haze cm.sup.3 /10
 min.
 0 6.47 89.6 1.35 0.8 12.07
 0.5 6.81 87.9 2.70 2.10 16.97
 1.5 1.85 89.1 1.85 1.55 23.00
 2.0 0.30 89.4 2.05 1.15 26.71
 1.5.sup.(a) 0.45 88.6 5.80 0.6 23.00
 .sup.(a) abusive molding conditions as used in Example 5 above.
 It should be noted that the anti-static properties of the anti-static agent
 of this invention (tetrabutylphosphonium nona-fluoro-1-butanesulfonate
 Example 1) has better anti-static properties at significantly lower
 concentration than the anti-static property of the prior art phosphonium
 sulfonate EPA-202. The lower the surface resistivity the better is the
 anti-static property of the additive. At 2.0% concentration of the prior
 art additive, the resistivity is equivalent to just 0.8% concentration of
 the inventive anti-static additive. Also, it is noted that the EPA-202 is
 a viscous yellow oil which increases the Yellowness Index while the
 anti-static additive, Example 1, is a white solid thus facilitating better
 dispersion of a powder than a viscous oil.
 In addition, it is further noted that the melt flow of the composition of
 the invention is essentially unaffected as determined by MVR. Even at a
 concentration of 1.5% (TABLE 1) the MVR is only slightly greater than a
 composition with no additive. In TABLE 3, at a concentration of 1.5% of
 the prior art anti-static agent, the MVR is almost doubled compared to no
 additive. This demonstrates that the prior art additive acts as a
 plastisizer which has a significant negative effect on mechanical
 properties, particularly aromatic polycarbonate resins.
 EXAMPLE 7
 A high flow aromatic polycarbonate resin, having an intrinsic viscosity of
 about 0.42 deciliters per gram as measured in methylene chloride at
 20.degree. C., was melt blended and injection molded under the same
 conditions as employed in Example 4 except that compact disc (CD) blanks
 were molded.
 Three compositions and sets of CD's (10 per composition) were prepared as
 described above with the polycarbonate content varied with respect to the
 concentration of the anti-static agent present in the formulation. Each
 formulation contained the same quantity of mold release agent and
 stabilizer.
 The sample CD blanks were then evaluated for transparency, color and static
 charge. The static charge was measured directly after molding on each CD
 blank from employing a calibrated field hand held meter by SIMCO.RTM.. The
 results obtained were as follows:
 TABLE 4
 Antistatic
 concentration Static Charge Appearance
 (%) (Volts) Transparency Coloring
 0 1400 good none
 0.3 800 good none
 0.5 400 good none
 The results clearly show that in very high flow grades excellent antistatic
 properties are obtained without affecting transparency and color.
 The formulation containing 0.5% antistatic additive showed no dust
 attraction in the Dust Attraction Test. The addition of 0.3% antistatic
 agent showed a large improvement compared to the reference with no
 anti-static additives.
 EXAMPLE 8
 The antistatic properties of the fluorinated phosphonium sulfonate of
 Examples 2 and 3 (Formulas 5 and 6) above were determined by first melt
 blending with anti-static agent, a transparent aromatic polycarbonate
 resin having an intrinsic viscosity of about 0.46 deciliters per gram
 (dl/gm) as measured in methylene chloride at 20.degree. C., in a twin
 screw extruder at a temperature of about 285.degree. C., extruded through
 a die orifice into strands which were quenched in water and then
 pelletized. The pellets were dried at about 125.degree. C. for about 2
 hours. The dried pellets were injection molded into plaques of about 10
 cm. square by about 2.5 mm. thick at an injection molding temperature of
 about 285.degree. C. using a single screw injection molding machine.
 Obviously, the temperature profile over the injection molding barrel was
 varied to an ultimate of about 285.degree. C. In this Example, the barrel
 temperature varied from about 20.degree. C. to about 285.degree. C. Each
 composition set forth in TABLE 5 below was prepared under the same
 conditions as set forth above with the polycarbonate content varied with
 respect to the concentration of the anti-static agent present in each
 formulation. Each formulation also contained the same quantity of mold
 release agent, UV absorber, stabilizers, antioxidant and dye, the total of
 which was about 0.8 wt % of the polycarbonate employed. The results
 obtained were as follows:
 TABLE 5
 Surface
 Resistivity Appearance
 Anti Static Concentration (10.sup.14 Ohm at Transparency Yellowness
 Agent Wt. %) 55.degree. C.) (%) Index Haze
 Control 0 16.6 89.6 1.35 0.8
 Example 2 0.5 8.90 89.1 1.35 1.0
 Example 2 1.0 0.21 89.8 1.40 0.9
 Example 3 0.5 7.74 89.2 1.45 1.1
 Example 3 1.0 0.12 89.7 1.30 1.4
 As seen from the Examples, the results clearly show a lower surface
 resistivity of the molded plaques with the anti-static composition of this
 invention at lower additive loadings compared to prior art EPA-202
 described in Example 6. Furthermore, with EPA-202, severe yellowing
 occurred using abusive molding conditions and this is not observed for the
 newly synthesized anti-static compositions of this invention. Also noted
 is that EPA-202 appears to be a plasticizer for polycarbonate as shown by
 the increase in MVR values while essentially no difference in flow is
 observed for the fluorinated phosphonium sulfonates of this invention.
 In the present invention, it is to be understood by those skilled in the
 art that various changes may be made in the particular embodiments
 described above without departing from the spirit and scope of the
 invention as defined in the appended claims.