Articles and structures having colorable antistatic polyetherimide blends

Abstract

Disclosed herein is a polymer composition comprising about 1 wt.% to about 99 wt.% of a polyetherimide resin; about 1 wt.% to about 70 wt.% of a crystalline polyester resin; about 0.1 wt.% to about 50 wt.% of an inherently dissipative polymer; and about 0.001 wt.% to about 10 wt.% of an ester exchange inhibitor. The combined weight percentage values ​​of all components do not exceed about 100 wt.%, and all weight percentage values ​​are based on the total weight of the polymer composition. When measured according to ASTM D257, the polymer composition may exhibit a 1×10 9 Ohm to 9×10 10 Surface resistance in ohms.

Description

Technical Field

[0001] The present disclosure relates to electrostatic dissipative polyetherimide blends, particularly colorable electrostatic dissipative polyetherimide blends. Background Art

[0002] Electrostatic discharge can be harmful to electronic components, leading to malfunctions, reduced reliability and increased costs, as well as potential component failures in deployed equipment. Polymer materials are generally good insulators, but can be made conductive or electrostatically dissipative by the addition of conductive fillers such as metallic fillers, non-conductive fillers coated with metal coatings, or conductive non-metallic fillers, and carbon-based fillers such as carbon nanotubes, carbon fibers, and carbon black. The addition of such materials creates a network of interconnected particles within the polymer matrix, allowing charge to be conducted across the insulating polymer. Electrostatically dissipative (ESD) and antistatic materials are widely used in a variety of fields such as semiconductors, consumer electronics, and industrial construction to prevent the accumulation of static electricity. Both types are defined by their surface resistance (SR), with the former ranging from 1×10 6 Up to 1×10 9 ohm, and the latter is 1×10 10 Up to 1×10 12 Ohms. Typical ESD materials are generally non-colorable because they are limited by the natural black or dark color of the conductive carbon filler. In contrast, those compounds doped with conventional inherently dissipative polymers (IDPs) (to achieve electrostatic performance) cannot achieve colors as low as 1×10 9 ohm surface resistance - despite its apparent colorlessness. There is still a need in the art for materials with sufficiently low surface resistance (at least as low as 1×10 9 ohms) while also maintaining a colorable appearance. Summary of the invention

[0003] Aspects of the present disclosure are directed to polymer compositions comprising from about 1 wt.% to about 99 wt.% of a polyetherimide resin; from about 1 wt.% to about 70 wt.% of a crystalline polyester resin; from about 0.1 wt.% to about 50 wt.% of an inherently dissipative polymer; and from about 0.001 wt.% to about 10 wt.% of an ester exchange inhibitor, wherein the polymer composition exhibits a 1×10 9 Ohm to 9×10 10 ohms, and when measured in accordance with ASTM D257, the polymer composition exhibits a surface resistance of 1×10 8 Up to 9×10 9 A volume resistivity of ohm·cm, and wherein the combined weight percent value of all components does not exceed about 100 wt.%, and all weight percent values ​​are based on the total weight of the polymer composition.

[0004] In still other aspects, the present disclosure is directed to methods of forming a composition comprising a polyetherimide polymer, a crystalline polyester, an inherently dissipative polymer additive, and a transesterification inhibitor.

[0005] In certain aspects, the present disclosure is directed to methods of forming an article, the methods comprising the step of molding an article from a polymer composition described herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several aspects and, together with the description, serve to explain the principles of the disclosure.

[0007] Figure 1 Table 1 showing the components of the prepared compositions is presented.

[0008] Figure 2 Table 2 showing the compounding conditions of colorable ESD polycarbonate grades is presented.

[0009] Figure 3 Table 3 showing the injection molding conditions for colorable ESD polycarbonate grades is presented.

[0010] Figure 4 Table 4 showing the test standards used is presented.

[0011] Figure 5 Table 5 showing the formulations and surface resistances of samples C-1, EX-1, EX-2, EX-3, and EX-4 is presented.

[0012] Fig. 6A An image of a molded plaque comprising sample EX-1 is shown. Figure 6B An image of a molded plaque comprising Sample C-3, a conventional conductive carbon black filled polycarbonate, is shown. DETAILED DESCRIPTION

[0013] Given the complexity and sensitivity of microelectronic devices, the control of electrostatic discharge is increasingly challenging. Even at low voltages, such electrostatic discharges can severely damage sensitive devices. Electrostatic dissipative (ESD) and antistatic materials are widely used in a variety of fields such as semiconductors, consumer electronics, and industrial construction to prevent static electricity accumulation. Both types are defined by their surface resistance (SR), with the former ranging from 1×10 6 Up to 1×10 9 ohm, and the latter is 1×10 10 Up to 1×10 12 Therefore, by using a variety of electrostatic dissipative (ESD) materials, the accumulation of electrostatic charge on plastics during manufacturing or use can be avoided.

[0014] However, incorporating electrostatic dissipative materials (antistatic agents) into various different substrates or polymer resin matrices has its own limitations. Polymers generally require high temperature processing, which may damage or destroy the antistatic agent, thereby ineffectively rendering its ESD properties. In addition, many higher molecular weight ESD agents are immiscible with certain substrates or matrix polymers used. The use of antistatic agents may also only provide temporary ESD properties to the composition used. Performance and effectiveness are also limited by environmental conditions such as humidity. Conventional ESD materials also include conductive fillers such as carbon fibers, conductive carbon black, graphite, graphene, and carbon nanotubes, which generally also impart a dark color to the composition. Therefore, typical ESD materials are not easily colored because the color space may be limited by the natural black color of the conductive carbon filler. In addition, although compounds doped with conventional inherently dissipative polymers (IDPs) do not darken due to additives, they generally cannot reach as low as 1×10 9 However, the formulations of the present disclosure achieve both ESD and broad coloration potential while also maintaining desirable electrical, impact, and processing properties.

[0015] The present disclosure provides a composition of a colorable electrostatic dissipative (ESD) compound comprising an intrinsically dissipative polymer (IDP) doped polyetherimide (PEI) and a crystalline polymer such as polybutylene terephthalate (PBT) or poly (1,4-cyclohexylenedicarboxylic acid-1,4-cyclohexylenedimethylene ester) (PCCD). The composition can provide at least as low as 1×10 9 Low surface resistance (SR) of ohms, making it fully colorable and suitable for ESD applications. Shock, thermal and flow properties are also desirable for manufacturing.

[0016] In one aspect, the disclosed composition comprises from about 1 wt.% to about 99 wt.% of a polyetherimide resin; from about 1 wt.% to about 70 wt.% of a crystalline polyester resin; from about 0.1 wt.% to about 50 wt.% of an inherently dissipative polymer; and from about 0.001 wt.% to about 10 wt.% of an ester exchange inhibitor. When measured according to ASTM D257, the polymer composition may exhibit a relative humidity of less than 9×10 10 ohms, or the composition may exhibit a surface resistance of 1×10 9 Ohm to 9×10 10 The composition may further exhibit a surface resistance of less than 9×10 9 Ohm cm, or the composition may exhibit a volume resistivity of 1×10 8 Up to 9×10 9Volume resistivity of ohm·cm - when tested according to ASTM D257. In addition, the combined weight percentage values ​​of all components do not exceed about 100 wt.%, and all weight percentage values ​​are based on the total weight of the polymer composition. Therefore, the disclosed compositions containing polyetherimide (i.e., aromatic polyetherimide) maintain a high heat deflection temperature (HDT, greater than 140°C) even in the presence of other polymers such as PBT and IDP. The disclosed compositions also maintain these HDT values ​​while also achieving surface resistivity (as low as 10 9 Ohm level) and volume resistance (as low as 10 8 Ohm-cm).

[0017] Before the present compounds, compositions, articles, systems, devices and / or methods are disclosed and described, it is to be understood that they are not limited to specific synthetic methods unless otherwise specified, or specific reagents unless otherwise specified, as these may of course vary. It is also to be understood that the terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting.

[0018] The present disclosure encompasses various combinations of elements of the present disclosure, for example, combinations of elements from dependent claims that are subordinate to the same independent claim. In addition, it should be understood that, unless otherwise expressly stated, it is not intended in any way that any method set forth herein be interpreted as requiring that its steps be performed in a particular order. Therefore, in the absence of an actual description of the order in which its steps are to be followed in a method claim or otherwise specifically stating in the claims or specification that the steps are to be limited to a particular order, it is not intended in any way to derive an order in any respect. This applies to any possible non-explicit basis for interpretation, including: logical issues regarding the arrangement of steps or operational flow; ordinary meaning derived from grammatical organization or punctuation; and the number or type of embodiments described in the specification.

[0019] All publications mentioned herein are incorporated herein by reference to disclose and describe the methods and / or materials in connection with which the publications are cited.

[0020] definition

[0021] It should also be understood that the terminology used herein is for the purpose of describing specific aspects only and is not intended to be limiting. As used in the specification and claims, the term "comprising" may include the embodiments of "consisting of" and "consisting mainly of". Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. In this specification and the appended claims, reference will be made to various terms defined herein.

[0022] As used in the specification and the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Thus, for example, reference to "a polycarbonate" includes mixtures of two or more polycarbonate polymers. As used herein, the term "combination" includes blends, mixtures, alloys, reaction products, and the like.

[0023] Range can be expressed as from one value (first value) to another value (second value) in this article. When expressing such a range, the range includes one or both of the first value and the second value in some aspects. Similarly, when a value is expressed as an approximation by using the antecedent "about", it will be understood that the specific value constitutes another aspect. It will also be understood that the endpoints of each range are relevant to the other endpoint and are independent of the other endpoint. It should also be understood that multiple values ​​are disclosed herein, and in addition to the value itself, each value is also disclosed as "about" this specific value in this article. For example, if the value "10" is disclosed, "about 10" is also disclosed. It should also be understood that each unit between two specific units has also been disclosed. For example, if 10 and 15 are disclosed, 11, 12, 13 and 14 are also disclosed.

[0024] As used herein, the terms "about" and "at or about" mean that the amount or value may be the specified value, approximate the specified value, or approximately equal to the specified value. When used herein, it is generally understood that it is a ±10% variation of the nominal value shown, unless otherwise specified or derived. The term is intended to convey that similar values ​​contribute to the equivalent results or effects recorded in the claims. That is, it should be understood that the quantity, size, formula, parameter, and other quantities and features are not and need not be precise, but may be approximate and / or larger or smaller as needed, reflecting tolerances, conversion factors, rounding, measurement errors, etc., and other factors known to those skilled in the art. In general, the quantity, size, formula, parameter, or other quantity or feature is "approximately" or "approximately", whether or not it is explicitly stated as such. It should be understood that when "about" is used before a quantitative value, the parameter also includes the specific quantitative value itself, unless otherwise specifically stated.

[0025] As used herein, the term "optional" or "optionally" means that the subsequently described event or circumstance may or may not occur, and that the description includes instances where the event or circumstance occurs and instances where it does not occur. For example, the phrase "optional additive" means that the additive may or may not be included, and that the description includes polymer compositions that include and do not include the additional additive.

[0026] In one aspect, "substantially free" may refer to less than 0.5 wt.% or less than about 0.5 wt.% in a given composition or component. In another aspect, substantially free may be less than 0.1 wt.% or less than about 0.1 wt.%. In another aspect, substantially free may be less than 0.01 wt.% or less than about 0.01 wt.%. In another aspect, substantially free may be less than 100 parts per million (ppm), or less than about 100 ppm. In another aspect, substantially free may refer to, if present, an amount below a detectable level. Substantially free or free may further refer to a component that has not been added or incorporated into the composition.

[0027] Disclosed are components for preparing the compositions of the present disclosure and compositions themselves for the methods disclosed herein. These and other materials are disclosed herein, and it should be understood that when the combinations, subsets, interactions, groupings, etc. of these materials are disclosed, and the specific mention of each individual and collective combination and arrangement of these compounds cannot be clearly disclosed, each is specifically considered and described herein. For example, if a specific compound is disclosed and discussed, and a variety of modifications that can be made to a variety of molecules including the compound are discussed, then each combination and arrangement of the compound and possible modifications are specifically considered, unless there is a clear contrary description. Therefore, if a class of molecules A, B and C are disclosed and an example AD of a class of molecules D, E and F and a combination of molecules is disclosed, then even if each is not described separately, each is also considered individually and collectively, meaning that combinations AE, AF, BD, BE, BF, CD, CE and CF are also considered. Similarly, any subset or combination of these is also disclosed. Therefore, for example, it is considered that subgroups AE, BF and CE are disclosed. This concept applies to all aspects of the application, including but not limited to steps in the method for preparing and using the disclosed composition. Thus, if there are a variety of additional steps that can be performed it is understood that each of these additional steps can be performed in any specific aspect or combination of aspects of the methods of the present disclosure.

[0028] References to parts by weight of a particular element or component in a composition or article in the specification and the appended claims represent the weight relationship between the element or component and any other elements or components in the composition or article in which the parts are expressed. Thus, in a compound comprising 2 parts by weight of component X and 5 parts by weight of component Y, X and Y are present in a weight ratio of 2:5, and are present in this ratio regardless of whether the compound contains additional components.

[0029] Unless specifically stated to the contrary, the weight percentage of a component is based on the total weight of the formulation or composition in which the component is included.

[0030] As used herein, the terms "weight percent", "wt%" and "wt. %", which are used interchangeably, represent the weight percentage of a given component based on the total weight of the composition, unless otherwise specified. That is, unless otherwise specified, all wt% values ​​are based on the total weight of the composition. It should be understood that the sum of the wt% values ​​of all components in the disclosed composition or formulation is equal to 100.

[0031] Unless otherwise indicated herein to the contrary, all test standards are the most recent standards in effect at the time this application is filed.

[0032] Each of the materials disclosed herein is commercially available and / or its preparation methods are known to those skilled in the art.

[0033] It is understood that the compositions disclosed herein have certain functions. Certain structural requirements are disclosed herein for performing the disclosed functions, and it is understood that there are multiple structures that can perform the same functions related to the disclosed structures, and these structures will generally achieve the same results.

[0034] Polymer base resin

[0035] On the one hand, polymer composition can include polymer resin. In various aspects, polymer base resin can include thermoplastic resin or thermosetting resin. Thermoplastic resin can include polypropylene, polyethylene, ethylene copolymer, polyamide, polycarbonate, polyester, polyoxymethylene (POM), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polycyclohexylendimethylene terephthalate (PCT), liquid crystal polymer (LPC), polyphenylene sulfide (PPS), polyphenylene oxide (PPE), polyphenylene oxide-polystyrene blend, polystyrene, high impact modified polystyrene, acrylonitrile-butadiene-styrene (ABS) terpolymer, acrylic polymer, polyetherimide (PEI), polyurethane, polyetheretherketone (PEEK), polylactic acid (PLA) polymer, polyethersulfone (PES) and combination thereof. Thermoplastic resin can also include thermoplastic elastomer such as polyamide and polyester elastomer. The base substrate may also include blends and / or other types of combinations of the above resins. In various aspects, the polymer base resin may also include a thermosetting polymer. Suitable thermosetting resins may include phenolic resins, urea resins, melamine-formaldehyde resins, urea-formaldehyde latexes, xylene resins, diallyl (o-)phthalate resins, epoxy resins, aniline resins, furan resins, polyurethanes, or combinations thereof.

[0036] On the one hand, polymer composition can include polymer resin.In various aspects, polymer base resin can include thermoplastic resin or thermosetting resin.Thermoplastic resin can include polypropylene, polyethylene, ethylene copolymer, polyamide, polycarbonate, polyester, polyoxymethylene (POM), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polycyclohexylene dimethyl terephthalate (PCT), liquid crystal polymer (LPC), polyphenylene sulfide (PPS), polyphenylene ether (PPE), polyphenylene ether-polystyrene blend, polystyrene, high impact modified polystyrene, acrylonitrile-butadiene-styrene (ABS) terpolymer, acrylic polymer, polyetherimide (PEI), polyurethane, polyetheretherketone (PEEK), polylactic acid (PLA) polymer, polyethersulfone (PES) and combination thereof.Thermoplastic resin can also include thermoplastic elastomer such as polyamide and polyester elastomer.The base substrate can also include blends and / or other types of combinations of the above-mentioned resins. In various aspects, the polymer base resin may also include a thermosetting polymer. Suitable thermosetting resins may include phenolic resins, urea resins, melamine-formaldehyde resins, urea-formaldehyde latex, xylene resins, diallyl (ortho) phthalate resins, epoxy resins, aniline resins, furan resins, polyurethanes, or combinations thereof.

[0037] In a specific aspect, the polymer composition comprises a polycarbonate, specifically a polycarbonate copolymer. As used herein, "polycarbonate" refers to an oligomer or polymer comprising residues of one or more dihydroxy compounds (e.g., dihydroxy aromatic compounds) connected by carbonate linkages; it also includes homopolycarbonates, copolycarbonates, and (co)polyester carbonates. The terms "residue" and "structural unit" used with respect to the components of the polymer are synonymous throughout the specification. As used herein, the interchangeably used terms "BisA", "BPA" or "bisphenol A" refer to a compound having a structure represented by formula (1):

[0038]

[0039] BisA may also be referred to by the name 4,4'-(propane-2,2-diyl)diphenol; p,p'-isopropylidenebisphenol; or 2,2-bis(4-hydroxyphenyl)propane. BisA has CAS# 80-05-7.

[0040] Combinations of polycarbonates with other thermoplastic polymers can be used, such as combinations of homopolycarbonates, copolycarbonates, and polycarbonate copolymers with polyesters. Useful polyesters include, for example, poly(dicarboxylic acid alkylene esters), liquid crystal polyesters, and polyester copolymers. When blended, the polyesters described herein can be generally fully miscible with the polycarbonate.

[0041] In a further example, the polycarbonate of the polymer base resin may include a branched polycarbonate. Exemplary branching agents may include, but are not limited to, 1,1,1-tris(4-hydroxyphenyl)ethane (THPE). As another example, the branched polycarbonate resin may be end-capped with a suitable end-capping agent such as, for example, p-cyanophenol (referred to as HBN).

[0042] The polymer resin may include a polycarbonate copolymer comprising units derived from BPA, or a mixture of one or more polycarbonate copolymers comprising units derived from BPA. In a specific example, the polymer resin may include a polycarbonate copolymer having units derived from BPA and a poly(aliphatic ester)-polycarbonate copolymer derived from sebacic acid.

[0043] In some aspects, the polycarbonate copolymer component comprises a polyester-polycarbonate copolymer. As further described herein, the polyester has repeating units of the following formula (A):

[0044]

[0045] wherein T is a residue derived from terephthalic acid or a chemical equivalent thereof, and D is a residue derived from the polymerization of ethylene glycol, butanediol, specifically 1,4-butanediol or a chemical equivalent thereof.

[0046] In a specific aspect, the polyester unit is derived from the reaction of isophthalic acid, terephthalic acid and resorcinol (also known as ITR resin). The polyester unit has the following structure (B):

[0047]

[0048] wherein x corresponds to the molar ratio of isophthalic acid groups, y corresponds to the molar ratio of resorcinol, and z corresponds to the molar ratio of terephthalic acid groups; x, y and z add up to 100% of the polyester units. The concentration of the polyester (ITR) resin can be at least 5%, based on the number of moles in the polymer. In a further aspect, the polyester and polycarbonate are used in a molar ratio of about 5:95 to about 40:60, or more specifically about 5:95 to about 35:65, depending on the desired properties. The weight average molecular weight of the polyester-polycarbonate can be about 1,500 to about 100,000, or more specifically about 2,000 to about 40,000. The polyester-polycarbonate polymer can be a copolymer, especially a block copolymer.

[0049] Specifically, the polyester units of the polyester-polycarbonate can be derived from the reaction of isophthalic acid and terephthalic acid (or their derivatives) with a combination of resorcinol, bisphenol A, or a combination comprising one or more of these, wherein the molar ratio of isophthalate units to terephthalate units is from 91:9 to 2:98, specifically from 85:15 to 3:97, more specifically from 80:20 to 5:95, and even more specifically from 70:30 to 10:90. In the case where the polycarbonate comprises units derived from resorcinol and / or bisphenol A, the molar ratio of the resorcinol carbonate units to the bisphenol A carbonate units is 0:100 to 99:1, and the molar ratio of the mixed isophthalate-terephthalate polyester units to the polycarbonate units in the polyester-polycarbonate may be 1:99 to 99:1, specifically 5:95 to 90:10, more specifically 10:90 to 80:20. When a blend of polyester-polycarbonate and polycarbonate is used, the ratio of polycarbonate to polyester-polycarbonate in the blend may be 1:99 to 99:1, specifically 10:90 to 90:10, respectively.

[0050] In specific aspects, the polycarbonate copolymer may include a resorcinol-based aromatic polyester or a resorcinol-based polyester carbonate polymer. ITR (isophthalate terephthalate resorcinol) resorcinol-based aromatic polyester and "resorcinol-based polyarylate" and "resorcinol-based polyarylate" all mean copolymers containing resorcinol moieties and resorcinol-based ester linkages and possibly other linkages (also such as resorcinol-based polycarbonate linkages). These terms are meant to include both polyesters and polyester carbonates containing only ester bonds in the presence of resorcinol-based polycarbonate linkages. Thus, a polyester-polycarbonate copolymer may contain carbonate repeating units and ester repeating units of bisphenol A, which may be any copolymer of BPA polycarbonate and (o-)phthalic acid resorcinol (ITR) (C) and such as (D).

[0051]

[0052] These copolycarbonates can be synthesized by skilled artisans or can be obtained commercially, such as SABIC LEXAN TM SLX resin. LEXAN TM SLX resin is an ITR-polycarbonate copolymer with a molecular weight of 20,000-30,000 and a refractive index of about 1.59-1.603.

[0053] As an example, a resorcinol-based polyarylate may comprise carbonate linkages (eg, between resorcinol moieties and bisphenol A moieties) and ester linkages (eg, between resorcinol moieties and isophthalic acid moieties). In aspects of the present disclosure, the composition comprises ITR-BPAPC.

[0054] In some cases, the resorcinol-based polyarylate resin may contain at least about 40 mole % of a moiety derived from resorcinol. The resorcinol moiety may be introduced as a reaction product of resorcinol or a functionalized resorcinol with an aryl dicarboxylic acid or aryl dicarboxylic acid derivative suitable for forming an aryl ester linkage with resorcinol. Suitable dicarboxylic acid derivatives include, for example, carboxylic acid halides, carboxylic acid esters, and carboxylic acid salts.

[0055] The resorcinol-based polyarylates may further comprise carbonate linkages derived from the reaction of bisphenols with carbonate-forming species such as phosgene, making the resorcinol-based polyarylates polyester carbonate copolymers. In another embodiment of the invention, the resorcinol polyarylate carbonate copolymer will comprise the reaction product of isophthalic acid and terephthalic acid, resorcinol, and optionally bisphenol A with phosgene. On the one hand, the resorcinol polyester carbonate copolymer will be prepared in a manner that minimizes the number of bisphenol dicarboxylic acid ester linkages, such as by pre-reacting resorcinol with a dicarboxylic acid to form an aromatic polyester block, and then reacting the aromatic polyester block with bisphenol and carbonate moieties to form the polycarbonate portion of the copolymer. Examples of polymers containing resorcinol esters can be found in U.S. Patents 6,861,482, 6,559,270, 6,265,522, 6,294,647, 6,291,589, and 5,916,997.

[0056] In other examples, the polycarbonate copolymer may include a polycarbonate-dimethylbisphenol cyclohexane copolymer (DMBPC) including at least 50 mol% of dimethylbisphenol cyclohexane monomer. DMBPC has formula (E):

[0057]

[0058] Wherein x and y represent the molar ratio of dimethyl bisphenol cyclohexane monomer and polycarbonate monomer, respectively. Therefore, when x is 50, y is also 50, and the copolymer contains 50 mol% of dimethyl bisphenol cyclohexane monomer and 50 mol% of polycarbonate monomer. In some aspects, x is 20 to 100.

[0059] In a further aspect, the polyester-polycarbonate copolymer comprises repeating units of formula (A) above, wherein D is a divalent radical derived from a dihydroxy compound and can be, for example, C 2-10 Alkylene radical, C 6-20 Alicyclic radicals, C 6-20An aromatic radical or a polyoxyalkylene radical, wherein the alkylene group contains 2 to 6 carbon atoms, specifically 2, 3 or 4 carbon atoms; and T is a divalent radical derived from a dicarboxylic acid and may be, for example, C 2-10 Alkylene radical, C 6-20 Alicyclic radicals, C 6-20 Alkyl aromatic radical or C 6-20 Aromatic free radicals.

[0060] On the one hand, D is C 2-6 In another embodiment, D is derived from an aromatic dihydroxy compound of formula (F):

[0061]

[0062] Each R f are independently halogen atoms, C 1-10 Hydrocarbon or C 1-10 Halogen substituted hydrocarbon, and n is 0 to 4. Halogen is typically bromine. Examples of compounds that can be represented by formula (7) include resorcinol, substituted resorcinol compounds such as 5-methylresorcinol, 5-ethylresorcinol, 5-propylresorcinol, 5-butylresorcinol, 5-tert-butylresorcinol, 5-phenylresorcinol, 5-cumylresorcinol, 2,4,5,6-tetrafluororesorcinol, 2,4,5,6-tetrabromoresorcinol or the like; catechol; hydroquinone; substituted hydroquinones such as 2-methylhydroquinone, 2-ethylhydroquinone, 2-propylhydroquinone, 2-butylhydroquinone, 2-tert-butylhydroquinone, 2-phenylhydroquinone, 2-cumylhydroquinone, 2,3,5,6-tetramethylhydroquinone, 2,3,5,6-tetra-tert-butylhydroquinone, 2,3,5,6-tetrafluorohydroquinone, 2,3,5,6-tetrabromohydroquinone or the like; or a combination comprising at least one of the foregoing compounds.

[0063] Examples of aromatic dicarboxylic acids that can be used to prepare polyesters include isophthalic acid or terephthalic acid, 1,2-di(p-carboxyphenyl)ethane, 4,4'-dicarboxydiphenyl ether, 4,4'-bisbenzoic acid, and mixtures comprising at least one of the foregoing acids. Acids containing fused rings may also be present, such as in 1,4-, 1,5- or 2,6-naphthalene dicarboxylic acids. Specific dicarboxylic acids are terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, cyclohexane dicarboxylic acid, or mixtures thereof. Specific dicarboxylic acids include mixtures of isophthalic acid and terephthalic acid, wherein the weight ratio of terephthalic acid to isophthalic acid is from 91:1 to 2:98. In another specific embodiment, D is C 2-6 alkylene radical, and T is p-phenylene, m-phenylene, naphthylene, a divalent alicyclic radical, or a mixture thereof. Such polyesters include poly(alkylene terephthalates).

[0064] The polysiloxane-polycarbonate copolymer can be a useful polycarbonate copolymer and can contain 50 wt.% to 99 wt.% carbonate units and 1 wt.% to 50 wt.% siloxane units. Within this range, the polyorganosiloxane-polycarbonate copolymer can contain 70 wt.% to 98 wt.%, more specifically 75 wt.% to 97 wt.% carbonate units and 2 wt.% to 30 wt.%, more specifically 3 wt.% to 25 wt.% siloxane units.

[0065] In one aspect, the polysiloxane-polycarbonate copolymer may contain 10 wt% or less, specifically 6 wt% or less, and more specifically 4 wt% or less of polysiloxane based on the total weight of the polysiloxane-polycarbonate copolymer, and may be generally optically transparent, and can be commercially available from SABIC under the designation EXL-T. In another aspect, the polysiloxane-polycarbonate copolymer may contain 10 wt% or more, specifically 12 wt% or more, and more specifically 14 wt% or more of the polysiloxane copolymer based on the total weight of the polysiloxane-polycarbonate copolymer, and is generally optically opaque, and can be commercially available from SABIC under the trade name EXL-P.

[0066] The weight average molecular weight of the polyorganosiloxane-polycarbonate can be 2,000 to 100,000 Daltons, specifically 5,000 to 50,000 Daltons, as measured by gel permeation chromatography using a cross-linked styrene-divinylbenzene column at a sample concentration of 1 mg / mL and calibrated with polycarbonate standards.

[0067] The polyorganosiloxane-polycarbonate may have a thermal conductivity of 1 to 50 cubic centimeters per 10 minutes (cm3) measured at 300 degrees Celsius (°C) / 1.2 kilograms (kg). 3 / 10min), specifically 2 to 30cm 3 A melt volume flow rate of 1000 g / 10 min. Mixtures of polyorganosiloxane-polycarbonates of different flow properties may be used to achieve the overall desired flow properties.

[0068] Non-limiting examples of polysiloxane-polycarbonate copolymers may include various copolymers available from SABIC. In one aspect, the polysiloxane-polycarbonate copolymer may contain 6% by weight of polysiloxane content based on the total weight of the polysiloxane-polycarbonate copolymer. In various aspects, the weight average molecular weight (Mw) of the 6% by weight polysiloxane block copolymer may be about 23,000 to 24,000 Daltons using gel permeation chromatography with bisphenol A polycarbonate absolute molecular weight standards. In certain aspects, the melt volume flow rate (MVR) of the 6% by weight siloxane polysiloxane-polycarbonate copolymer at 300°C / 1.2kg may be about 10cm 3 / 10min (see C9030T, 6 wt% polysiloxane content copolymer, available as "transparent" EXL C9030T resin polymer from SABIC). In another example, the polysiloxane-polycarbonate block may contain 20 wt% polysiloxane based on the total weight of the polysiloxane block copolymer. For example, a suitable polysiloxane-polycarbonate copolymer may be a bisphenol A polysiloxane-polycarbonate copolymer terminated with p-cumylphenol (PCP) and having a polysiloxane content of 20% (see C9030P, commercially available from SABIC as "opaque" EXL C9030P). In various aspects, the 20% polysiloxane block copolymer can have a weight average molecular weight of about 29,900 Daltons to about 31,000 Daltons when tested against polycarbonate standards using gel permeation chromatography (GPC) on a crosslinked styrene-divinylbenzene column and calibrated against a polycarbonate reference (using a UV-VIS detector set at 264 nanometers (nm) on a 1 milligram per milliliter (mg / ml) sample eluted at a flow rate of about 1.0 ml / minute). In addition, the 20% polysiloxane block copolymer can have a melt volume rate (MVR) of 7 cm / s at 300°C / 1.2 kg. 3 / 10 min, and can exhibit siloxane domains ranging in size from about 5 microns to about 20 microns (micrometers, μm).

[0069] The composition may include about 0.1wt.% to about 99wt.% of a polycarbonate copolymer. The PC copolymer component present in the polymer composition may be in the range of at least about 45wt.% to about 85wt.%. In a further example, the composition may include about 10wt.% to about 90wt.% of a polycarbonate copolymer, or about 10wt.% to about 80wt.% of a polycarbonate copolymer, or about 20wt.% to about 80wt.% of a polycarbonate copolymer, or about 25wt.% to about 80wt.% of a polycarbonate copolymer, or about 30wt.% to about 80wt.% of a polycarbonate copolymer, or about 40wt.% to about 80wt.% of a polycarbonate copolymer, or about 40wt.% to about 75wt.% of a polycarbonate copolymer, or about 45wt.% to about 80wt.% of a polycarbonate copolymer.

[0070] In various aspects, the disclosed compositions may include at least one crystalline polyester. Crystallinity or semi-crystallization of a polymer may describe a polymer in which the molecular chains are organized or more tightly packed. Thus, this highly organized molecular structure may provide a more defined melting point. These polymers are anisotropic when flowing, so they exhibit greater shrinkage across flow than with flow, which may sometimes result in some dimensional instability. There may be different degrees of crystallinity between different materials, and there may be variations between the same materials. Crystallinity may affect many properties of a polymer. Molecular weight and branching may affect crystallinity.

[0071] The at least one crystalline polyester comprises polybutylene terephthalate (PBT), polycyclohexylene dimethyl terephthalate (PCT), polyethylene terephthalate (PET), polyethylene terephthalate glycol (PETG), polycyclohexylenedimethylene terephthalate glycol (PCTG), polycyclohexylene dimethylene terephthalate acid (PCTA), copolymers thereof or combinations thereof. In a specific aspect, the at least one crystalline polyester comprises polybutylene terephthalate (PBT).

[0072] Certain aspects of the composition comprise from about 1 wt.% to about 99 wt.% of the at least one crystalline polyester, from 50 wt.% to about 97 wt.% of a thermoplastic resin, or from about 40 wt.% to about 97 wt.% of a polymer base resin, or from about 55 wt.% to about 97 wt.% of a polymer base resin, or from about 60 wt.% to about 97 wt.% of a polymer base resin, or from about 70 wt.% to about 97 wt.% of a polymer base resin, or from about 40 wt.% to about 95 wt.% of a polymer base resin, or from about 55 wt.% to about 95 wt.% of a polymer base resin, or from about 60 wt.% to about 95 wt.% of a polymer base resin, or from about 75 wt.% to about 97 wt.% of a polymer base resin.

[0073] In various aspects of the present disclosure, the thermoplastic resin may include a crystalline polyester. For example, the thermoplastic resin may include a polyalkylene ester (polyester), such as a polyalkylene terephthalate polymer.

[0074] As provided herein, polyesters have repeating units of the above formula (A). Chemical equivalents of diacids include dialkyl esters, such as dimethyl esters, diaryl esters, anhydrides, salts, acid chlorides, acid bromides, etc. Chemical equivalents of ethylene glycol and butanediol include esters, such as dialkyl esters, diaryl esters, etc. In addition to units derived from terephthalic acid or its chemical equivalents and ethylene glycol or butanediol (specifically 1,4-butanediol) or their chemical equivalents, other T and / or D units may also be present in the polyester, provided that the type or amount of such units does not significantly adversely affect the desired properties of the thermoplastic composition. Poly(alkylene aryl esters) may have a polyester structure according to formula (A), wherein T comprises a group derived from an aromatic dicarboxylic acid ester, an alicyclic dicarboxylic acid, or a derivative thereof.

[0075] Examples of particularly useful T groups include, but are not limited to, 1,2-, 1,3-, and 1,4-phenylene; 1,4- and 1,5-naphthylene; cis- or trans-1,4-cyclohexylene; and the like. Specifically, when T is 1,4-phenylene, the poly(alkylene arylate) is a poly(alkylene terephthalate). Furthermore, with respect to poly(alkylene arylate), particularly useful alkylene D includes, for example, ethylene, 1,4-butylene, and bis-(alkylene-disubstituted cyclohexanes), including cis- and / or trans-1,4-(cyclohexylene) dimethylene.

[0076] Examples of polyalkylene terephthalates include polyethylene terephthalate (PET), poly(1,4-butylene terephthalate) (PBT), and poly(propylene terephthalate) (PPT). Poly(alkylene naphthoates) such as poly(ethylene naphthoate) (PEN) and poly(butylene naphthoate) (PBN) are also useful. A useful poly(cycloalkylene diester) is poly(cyclohexanedimethylene terephthalate) (PCT). Combinations comprising at least one of the foregoing polyesters may also be used.

[0077] Copolymers comprising repeating ester units of alkylene terephthalates and other ester groups may also be useful. Useful ester units may include different alkylene terephthalate units, which may be present in the polymer chain as individual units or as blocks of poly(alkylene terephthalates). Specific examples of such copolymers include poly(cyclohexanedimethylene terephthalate)-co-poly(ethylene terephthalate), abbreviated as PETG, wherein the polymer comprises greater than or equal to 50 mol% of poly(ethylene terephthalate), abbreviated as PCTG, wherein the polymer comprises greater than 50 mol% of poly(1,4-cyclohexanedimethylene terephthalate). Poly(cycloalkylene diesters) may also include poly(methylene cyclohexane dicarboxylate). Among them, a specific example is poly(1,4-cyclohexane-dimethanol-1,4-cyclohexane dicarboxylate) (PCCD), having repeating units of formula (G):

[0078]

[0079] Wherein, as described by formula (A), R 2 is a 1,4-cyclohexanedimethylene group derived from 1,4-cyclohexanedimethanol, and T is a cyclohexane ring derived from a cyclohexane dicarboxylate or a chemical equivalent thereof, and may include a cis isomer, a trans isomer, or a combination comprising at least one of the foregoing isomers.

[0080] In another aspect, the composition may further comprise poly(1,4-butylene terephthalate) or "PBT" resin. PBT can be obtained by polymerizing: a diol component, at least 70 mol%, preferably at least 80 mol% of which consists of tetramethylene glycol; and an acid or ester component, at least 70 mol%, preferably at least 80 mol% of which consists of terephthalic acid and / or its polyester-forming derivatives. Commercial examples of PBT include PBT manufactured by SABIC TM Manufactured under the trade name VALOX TM 315. VALOX TM 195 and VALOX TM 176, which has an intrinsic viscosity of 0.1 deciliter / gram (dl / g) to about 2.0 dl / g (or 0.1 dl / g to 2 dl / g) when measured in a 60:40 phenol / tetrachloroethane mixture or similar solvent at 23 degrees Celsius (° C.) to 30° C. In one aspect, the PBT resin has an intrinsic viscosity of 0.1 dl / g to 1.4 dl / g (or about 0.1 dl / g to about 1.4 dl / g), specifically 0.4 dl / g to 1.4 dl / g (or about 0.4 dl / g to about 1.4 dl / g).

[0081] As described herein, the composition may include about 0.1wt.% to about 99wt.% of a crystalline polyester. In further examples, the composition may include about 0.1wt.% to about 50wt.% of a crystalline polyester, or about 0.1wt.% to about 30wt.% of a crystalline polyester, or about 0.1wt.% to about 40wt.% of a crystalline polyester, or about 0.1wt.% to about 25wt.% of a crystalline polyester, or about 0.1wt.% to about 15wt.% of a crystalline polyester, or about 1wt.% to about 15wt.% of a crystalline polyester, or about 1wt.% to about 20wt.% of a crystalline polyester, or about 0.5wt.% to about 12wt.% of a crystalline polyester. The polymer composition may include about 0.1wt.% to about 70wt.% of a crystalline polyester.

[0082] In one aspect, the disclosed composition can include a polyetherimide, which can have formula (H):

[0083]

[0084] wherein a is greater than 1, such as 10 to 1,000 or greater, or more specifically 10 to 500. In specific aspects, the polyetherimide is an aromatic polyetherimide.

[0085] The group V in formula (H) is a tetravalent linking group containing an ether group (as used herein as a "polyetherimide") or a combination of an ether group and an arylene sulfone group ("polyetherimide sulfone"). Such linking groups include, but are not limited to: (a) substituted or unsubstituted, saturated, unsaturated or aromatic monocyclic and polycyclic groups having 5 to 50 carbon atoms, optionally substituted with an ether group, an arylene sulfone group, or a combination of an ether group and an arylene sulfone group; and (b) substituted or unsubstituted, linear or branched, saturated or unsaturated alkyl group having 1 to 30 carbon atoms, and optionally substituted with an ether group or a combination of an ether group, an arylene sulfone group, and an arylene sulfone group; or a combination comprising at least one of the foregoing. Suitable other substitutions include, but are not limited to, ethers, amides, esters, and a combination comprising at least one of the foregoing.

[0086] The R group in formula (H) may include, but is not limited to, a substituted or unsubstituted divalent organic group, such as: (a) an aromatic hydrocarbon group having 6 to 20 carbon atoms and its halogenated derivatives; (b) a straight chain or branched chain alkylene group having 2 to 20 carbon atoms; (c) a cycloalkylene group having 3 to 20 carbon atoms, or (d) a divalent group of formula (I):

[0087]

[0088] Wherein Q1 includes but is not limited to divalent moieties such as -O-, -S-, -C(O)-, -SO2-, -SO-, -C y H 2y -(y is an integer from 1 to 5), and halogenated derivatives thereof, including perfluoroalkylene.

[0089] In one aspect, the linker V can include, but is not limited to, a tetravalent aromatic group of formula (J):

[0090]

[0091] Wherein W is a divalent moiety including -O-, -SO2- or a group of formula -OZO-, wherein the divalent bond of the -O- or -OZO- group is at the 3,3', 3,4', 4,3' or 4,4' position, and wherein Z includes but is not limited to a divalent group of formula (K):

[0092]

[0093] Wherein Q may include but is not limited to divalent moieties, including -O-, -S-, -C(O)-, -SO2-, -SO-, -C y H 2y-(y is an integer from 1 to 5), and halogenated derivatives thereof, including perfluoroalkylene.

[0094] In one aspect, the polyetherimide includes more than 1, specifically 10 to 1,000, or more specifically 10 to 500 structural units of formula (L):

[0095]

[0096] wherein T is -O- or a group of formula -OZO-, wherein the divalent bond of the -O- or -OZO- group is at the 3,3', 3,4', 4,3' or 4,4' position; z is a divalent group of formula (H) as defined above; and R is a divalent group of formula (8) as defined above.

[0097] On the other hand, the polyetherimide sulfone may be a polyetherimide including an ether group and a sulfone group.

[0098] Even more specifically, the polyetherimide sulfone may include more than 1, specifically 10 to 1,000, or more specifically 10 to 500 structural units of formula (M):

[0099]

[0100] wherein Y is -O-, -SO2- or a group of the formula -OZO-, wherein the divalent bond of the -O-, SO2- or -OZO- group is at the 3,3', 3,4', 4,3' or 4,4' position, wherein Z is a divalent group of formula (8) as defined above, and R is a divalent group of formula (6) as defined above, provided that more than 50 mol% of the sum of the molar number of Y + the molar number of R in formula (6) contains -SO2- groups.

[0101] It is to be understood that the polyetherimides and polyetherimide sulfones may optionally include a linking group V that does not contain an ether or an ether and a sulfone group, such as a linking group of formula (N):

[0102]

[0103] The imide units containing such linking groups may generally be present in an amount ranging from 0 to 10 mol %, specifically 0 to 5 mol %, of the total number of units. In one aspect, no additional linking groups V are present in the polyetherimide and polyetherimide sulfone.

[0104] The polyetherimide resin can be selected from: polyetherimides, for example, as described in U.S. Pat. Nos. 3,875,116, 6,919,422, and 6,355,723; silicone polyetherimides, for example, as described in U.S. Pat. Nos. 4,690,997 and 4,808,686; polyetherimide sulfone resins, as described in U.S. Pat. No. 7,041,773; or combinations thereof. Each of these disclosures is incorporated herein by reference in its entirety.

[0105] Suitable polyetherimides that can be used in the disclosed composite materials include, but are not limited to, ULTEM TM Resin. ULTEM TM The resin is a polymer from the polyetherimide (PEI) family sold by Saudi Basic Industries Corporation (SABIC). ULTEM TM The resin can have high heat resistance, high strength and hardness, and broad chemical resistance. Unless otherwise specified, ULTEM is used in this article. TM Resin refers to any or all of the ULTEM resins in this family TM In a further aspect, the ULTEM TM The resin is ULTEM TM 1010. In one aspect, the polyetherimide can include any polycarbonate material or mixture of materials, for example, as described in U.S. Patent Nos. 4,548,997; 4,629,759; 4,816,527; 6,310,145; and 7,230,066, all of which are hereby incorporated in their entirety for the specific purpose of disclosing various polyetherimide compositions and methods.

[0106] In a further aspect, the polyetherimide resin has a weight average molecular weight (Mw) of at least about 24,000 to about 150,000 grams per mole (g / mole) - measured by gel permeation chromatography using polystyrene standards. In a further aspect, the thermoplastic resin may include a polyetherimide polymer having a molecular weight of at least 40,000 Daltons, 50,000 Daltons, 60,000 Daltons, 80,000 Daltons, or 100,000 Daltons. In a further aspect, the molecular weight of the polyetherimide polymer is at least 40,000 Daltons, 40,000 Daltons, or 50,000 Daltons. In a further aspect, the molecular weight of the polyetherimide polymer is at least 40,000 Daltons. In a further aspect, the molecular weight of the polyetherimide polymer is at least 50,000 Daltons. In a further aspect, the molecular weight of the polyetherimide polymer is at least 60,000 Daltons. In a still further aspect, the polyetherimide polymer has a molecular weight of at least 70,000 Daltons. In an even further aspect, the polyetherimide polymer has a molecular weight of at least 100,000 Daltons.

[0107] Certain aspects of the composition include about 1 wt.% to about 99 wt.% of a polyetherimide resin. In further aspects, the composition includes about 20 wt.% to about 80 wt.% of a polyetherimide resin, or about 30 wt.% to about 50 wt.% of a polyetherimide resin, or about 30 wt.% to about 45 wt.% of a polyetherimide resin. The polyetherimide resin present in the polymer composition may be in the range of at least about 45 wt.% to about 85 wt.%. In further examples, the composition may include about 10 wt.% to about 90 wt.% of a polyetherimide resin, or about 10 wt.% to about 80 wt.% of a polyetherimide resin, or about 20 wt.% to about 80 wt.% of a polyetherimide resin, or about 25 wt.% to about 80 wt.% of a polyetherimide resin, or about 30 wt.% to about 80 wt.% of a polyetherimide resin, or about 40 wt.% to about 80 wt.% of a polyetherimide resin, or about 40 wt.% to about 80 wt.% of a polyetherimide resin, or about 40 wt.% to about 75 wt.% of a polyetherimide resin, or about 45 wt.% to about 80 wt.% of a polyetherimide resin.

[0108] Intrinsically dissipative polymers

[0109] In various aspects, the disclosed polymer compositions can include an inherently dissipative polymer (IDP). An inherently dissipative polymer can refer to a polymer resin having electrostatic dissipative (ESD) properties.

[0110] IDPs generally include modified polymers. In certain aspects, an IDP may include a thermoplastic elastomer or a modified thermoplastic elastomer. Such materials are generally described as polymers having hard and / or crystalline segments and / or blocks in their backbone structure and having soft and / or elastomeric segments and / or blocks. These may be referred to as multi-block copolymers.

[0111] The IDP disclosed herein may be doped with ions. Conventionally, the IDP may be doped with sodium ions. The IDP disclosed herein may be doped with phosphorus ions. Ionic.

[0112] In some aspects, the inherently dissipative polymer comprises a thermoplastic polyurethane (TPU), a polyolefin polyether copolymer, a thermoplastic polyester elastomer (COPE), a polyether block amide elastomer (COPA or PEBA), or a combination thereof. Examples of suitable copolymers include polyolefin-polyether copolymers.

[0113] As an example, the polymer composition may include an IDP comprising a nylon (or polyamide) based multi-block copolymer doped with ions, such as the commercially available Pelectron TM AS or TPA6060. Due to their properties, common nylon-based IDPs are detrimental to PC, resulting in degradation. However, the specific combination of components disclosed herein can overcome the potential for such degradation. Processing temperatures are desirably kept as low as possible to prevent reaction of the IDP with the PC and subsequent loss of surface conductivity. The unique composition enables low temperature processing. Therefore, for extrusion, compounding or injection molding, particularly for extrusion and injection molding, processing temperatures can be kept below 240°C.

[0114] As a further example, the polymer composition may include an IDP including a polymer masterbatch based on a polymer resin, such as avanDISS 378, which is commercially available.

[0115] The surface resistance of the IDP may be about E+6 to E+8 ohms (e.g., 1×10 6 Ohm to 9×10 8 The volume resistivity of the IDP may be about E+4 to E+7 ohm·cm (e.g., 1×10 4 Ohm to 9×10 7 Ohms). The IDP may have a resistance of about 1×10 7 Surface resistance in ohms.

[0116] In some aspects, the polymer composition may include about 0.1 wt.% to about 50 wt.% of IDP. In further aspects, the composition may include about 10 wt.% to about 50 wt.% of IDP, or about 15 wt.% to about 50 wt.% of IDP, or about 50 wt.% to about 70 wt.% of IDP, or about 18 wt.% to about 40 wt.% of IDP, or about 15 wt.% to about 45 wt.% of IDP, or about 12 wt.% to about 35 wt.% of IDP, about 12 wt.% to about 40 wt.% of IDP, or about 12 wt.% to about 50 wt.% of IDP, or about 12 wt.% to about 50 wt.% of IDP.

[0117] Transesterification inhibitors

[0118] The polymer composition may include one or more transesterification inhibitors. Transesterification inhibitors may prevent transesterification reactions of the polymer, thereby inhibiting polymerization. It is also known that the presence of transesterification inhibitors may inhibit polymerization. U.S. Pat. No. 4,069,278 teaches that in the polycondensation of ethylene glycol and dimethyl terephthalate catalyzed by calcium acetate and antimony oxide, no phosphorus-containing stabilizer (catalyst inhibitor) is added at any time.

[0119] Suitable transesterification inhibitors are well known in the art and can be selected from phosphorus-containing stabilizer inhibitors such as pentaerythritol diphosphite (GE Specialty Chemicals, Parkersburg, W.Va., Ultranox TM 626), phosphoric acid and polyphosphoric acid. Other examples are zinc diisopropyl dithiophosphate, tris(2,4-di-tert-butylphenyl)phosphite, tris(mononylphenyl)phosphite and mixtures thereof. Further transesterification inhibitors include sodium dihydrogen phosphate, potassium acetate, trimethyl phosphate and phenylphosphoric acid. Also included are orthophosphoric acids represented by the formula xH2O·yP2O5 and satisfying x / y 3, polyphosphoric acids referred to as diphosphoric acid, triphosphoric acid, tetraphosphoric acid and pentaphosphoric acid according to the degree of condensation and satisfying 2DX / y>1 and mixtures thereof. Also included are metaphosphoric acids represented by the formula xH2O·yP2O5 and satisfying x / y=1, especially trimetaphosphoric acid and tetrametaphosphoric acid, and superphosphoric acids having a network structure with a portion of a phosphorus pentoxide structure and satisfying 1>x / y>0 (these can be collectively referred to as "metaphosphoric acid compounds"). Also included are acid salts and esters of these phosphoric acids. Among them, cyclic sodium metaphosphate, ultra-region sodium metaphosphate and DHPA are advantageously used.

[0120] The transesterification inhibitor may be present in an amount of about 0.001 wt. % to about 10 wt. %, based on the total weight of the polymer composition.

[0121] White pigment

[0122] In addition to polycarbonate copolymers, crystalline polyesters, IDPs, and transesterification inhibitors, the polymer compositions of the present disclosure may also include white pigments. White pigments can impart opacity or a bright opaque appearance to the polymer resin composition. In a further aspect, white pigments can impart white or off-white color to the polymer resin composition. In addition, these pigments tend to have high reflectivity to both near infrared (NIR) and visible light. As used herein, reflectivity can refer to the ability to scatter light from the surface of a material without absorbing light of a given wavelength.

[0123] Suitable white pigments may include titanium dioxide, zinc sulfide (ZnS), tin oxide, aluminum oxide (AlO3), zinc oxide (ZnO), calcium sulfate, barium sulfate (BaSO4), calcium carbonate (e.g., chalk), magnesium carbonate, antimony oxide (Sb2O3), white lead (basic lead carbonate, 2PbCO3·Pb(OH)2), lithopone (a combination of barium sulfate and zinc sulfide), sodium silicate, aluminum silicate, silicon dioxide (SiO2, silicon dioxide), mica, clay, talc, metal-doped forms of the foregoing materials, and combinations comprising at least one of the foregoing materials. More specifically, the inorganic white pigment is selected from rutile or anatase titanium dioxide, zinc sulfide, and coated forms thereof such as silanized titanium dioxide. Combinations of different types of white pigments may be used. In specific aspects, the white pigment may include titanium dioxide, antimony oxide, zinc oxide, white lead, or lithopone. In some aspects of the present disclosure, talc may be used as a white pigment. Talc can be a suitable white pigment, where the material has a color coordinate value high enough to impart whiteness to the material. In one example, talc having a color coordinate * L value (corresponding to the whiteness of a given material) greater than 80 would be a suitable white pigment as described herein.

[0124] The average particle size of the white pigment may be 0.01 to 10 microns (μm), specifically 0.05 μm to 1 μm, and more specifically 0.1 μm to 0.6 μm. The white pigment may be present in an amount of about 0.1 wt.% to about 50 wt.%. As an example, the composition may include titanium dioxide in an amount between 0.1 wt.% and 50 wt.%. In a further example, the composition may include titanium dioxide in an amount between 0.1 wt.% and 20 wt.%.

[0125] Optical Agents

[0126] In a further aspect of the present disclosure, the polymer composition may include an optical agent. The optical agent may include an optical brightener. Examples of optical brighteners include optical brightening agents (OBA), fluorescent brightening agents (FBA), fluorescent whitening agents (FWA), or the like, or a combination of at least one of the foregoing optical brighteners. As used herein, an optical brightener refers to a dye that absorbs light in the ultraviolet and violet regions of the electromagnetic spectrum (usually about 340 to about 370 nm) and re-emits light in the blue region (usually about 420 to about 470 nm). These additives are often used to enhance the color appearance of polymer compositions, producing a perceived "whitening" effect. Depending on the perceived whitening effect, a given material can appear less yellow by increasing the total amount of blue light reflected. Exemplary optical brighteners are triazine-stilbene (di-, tetra- or hexa-sulfonated), coumarin, imidazoline, diazole, triazole, benzo oxazoline, biphenylstilbene or the like, or a combination comprising at least one of the foregoing optical brighteners. In specific aspects of the present disclosure, the optical agent may include but is not limited to 4,4'-bis(2-benzo oxazolyl)stilbene (available as EastmanEastobrite TM OB-1 commercially available) or 2,5-bis(5-tert-butyl-2-benzo Azolyl)thiophene (as Tinopal TM OB is commercially available) or a combination thereof.

[0127] In certain aspects, the composition comprises from about 0.001 wt.% to about 10 wt.% of an optical brightening agent. In further aspects, the composition comprises from about 0.01 wt.% to about 5 wt.% of an optical brightening agent, or from about 0.01 wt.% to about 1 wt.% of an optical brightening agent.

[0128] additive

[0129] The disclosed thermoplastic composition may include one or more additives conventionally used to make molded thermoplastic parts, provided that the optional additive does not adversely affect the desired properties of the resulting composition. Optional mixtures of additives may also be used. Such additives may be mixed at the appropriate time during the mixing of components for forming a composite mixture. Exemplary additives may include ultraviolet agents, ultraviolet stabilizers, heat stabilizers, antistatic agents, antimicrobial agents, anti-drip agents, radiation stabilizers, pigments, dyes, fibers, fillers, plasticizers, fibers, flame retardants, antioxidants, lubricants, wood, glass and metals and combinations thereof.

[0130] Thermoplastic compositions disclosed herein may include one or more additional fillers. Fillers may be selected to impart additional impact strength and / or provide additional characteristics, which may be based on the final selection properties of the polymer composition. In some aspects, filler (one or more) may include inorganic materials, which may include clay, titanium oxide, asbestos fiber, silicate and silicon dioxide powder, boron powder, calcium carbonate, talcum, kaolin, sulfide, barium compounds, metals and metal oxides, wollastonite, glass balls, glass fibers, flaky fillers, fiber fillers, natural fillers and reinforcing agents and reinforcing organic fiber fillers.

[0131] Suitable fillers or reinforcing agents may include, for example, mica, clay, feldspar, quartz, quartzite, perlite, tripoli, diatomaceous earth, aluminum silicate (mullite), synthetic calcium silicate, fused silica, pyrogenic silica, sand, boron nitride powder, boron silicate powder, calcium sulfate, calcium carbonate (such as chalk, limestone, marble and synthetic precipitated calcium carbonate), talc (including fibrous, modular, acicular and lamellar talc), wollastonite, hollow or solid glass spheres, silicate spheres, hollow microspheres, aluminosilicates or (armospheres), kaolin clay, silicon carbide, aluminum oxide, boron carbide, whiskers of iron, nickel or copper, continuous and chopped carbon or glass fibers, molybdenum sulfide, zinc sulfide, barium titanate, barium ferrite, barium sulfate, barite, TiO2, aluminum oxide, magnesium oxide, granular or fibrous aluminum, bronze, zinc, copper or nickel, glass flakes, flake silicon carbide, flake aluminum diboride, flake aluminum, steel flakes, natural fillers such as wood flour, fibrous cellulose, cotton, sisal, jute, starch, lignin, ground nut shells or rice husks, reinforcing organic fibrous fillers such as poly(ether ketone), polyimide, polybenzoic acid The invention relates to a filler or reinforcing agent comprising a polyimide, polytetrafluoroethylene, poly(phenylene sulfide), poly(ethylene), poly(aramide), poly(aromatic polyimide), polyetherimide, polytetrafluoroethylene, and poly(vinyl alcohol), and a combination comprising at least one of the foregoing fillers or reinforcing agents. The fillers and reinforcing agents may be coated with a layer of a metallic material to promote conductivity, or surface treated, for example with silanes, to improve adhesion and dispersibility with the polymer matrix. The fillers may generally be used in an amount of 1 to 200 parts by weight based on 100 parts by weight of the total composition.

[0132] In some aspects, the thermoplastic composition may include a synergist. In various examples, fillers may serve as flame retardant synergists. When added to a flame retardant composition, the synergist promotes the improvement of flame retardant properties compared to a comparative composition containing all the same ingredients of the same amount except the synergist. Examples of mineral fillers that may serve as synergists are mica, talc, calcium carbonate, dolomite, wollastonite, barium sulfate, silicon dioxide, kaolin, feldspar, barite or the like, or a combination including at least one of the aforementioned mineral fillers. Metal synergists such as antimony oxide may also be used with flame retardants. In one example, the synergist may include magnesium hydroxide and phosphoric acid. The mineral filler may have an average particle size of about 0.1 to about 20 μm, specifically about 0.5 to about 10 μm, and more specifically about 1 to about 3 μm.

[0133] The thermoplastic composition may include an antioxidant. The antioxidant may include a primary antioxidant or a secondary antioxidant. For example, the antioxidant may include an organic phosphite such as tris(nonylphenyl)phosphite, tris(2,4-di-tert-butylphenyl)phosphite, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, distearylpentaerythritol diphosphite, or the like; alkylated monophenols or polyphenols; alkylation reaction products of polyphenols with dienes, such as tetrakis[methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane, or the like; butylation reaction products of p-cresol or dicyclopentadiene; alkylated hydroquinones; hydroxylated thiodiphenyl ethers; alkylene-bisphenols; benzyl compounds; β-(3,5-di-tert-butyl-4-hydroxy Esters of β-(5-tert-butyl-4-hydroxy-3-methylphenyl)-propionic acid and monohydric or polyhydric alcohols; Esters of β-(5-tert-butyl-4-hydroxy-3-methylphenyl)-propionic acid and monohydric or polyhydric alcohols; Esters of thioalkyl or thioaryl compounds such as distearyl thiopropionate, dilauryl thiopropionate, ditridecyl thiodipropionate, octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, pentaerythritol-tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate or the like; Amides of β-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionic acid or the like, or a combination comprising at least one of the foregoing antioxidants. Antioxidants can generally be used in an amount of 0.01 to 0.5 parts by weight based on 100 parts by weight of the total composition excluding any filler.

[0134] In various aspects, the thermoplastic composition may include a release agent. Exemplary release agents may include, for example, metal stearates, stearyl stearate, pentaerythritol tetrastearate, beeswax, montan wax, paraffin wax, or the like, or a combination comprising at least one of the foregoing release agents. The release agent is generally used in an amount of about 0.1 to about 1.0 parts by weight based on 100 parts by weight of the total composition excluding any filler.

[0135] In one aspect, the thermoplastic composition may include a heat stabilizer. As an example, the heat stabilizer may include, for example, an organic phosphite such as triphenyl phosphite, tris-(2,6-dimethylphenyl)phosphite, tris-(mixed mono- and di-nonylphenyl)phosphite, or the like; a phosphonate such as dimethylphenylphosphonate or the like, a phosphate such as trimethyl phosphate or the like, or a combination comprising at least one of the foregoing heat stabilizers. The heat stabilizer may generally be used in an amount of 0.01 to 0.5 parts by weight based on 100 parts by weight of the total composition excluding any filler.

[0136] In a further aspect, a light stabilizer may be present in the thermoplastic composition. Exemplary light stabilizers may include, for example, benzotriazoles such as 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2-hydroxy-5-tert-octylphenyl)-benzotriazole, and 2-hydroxy-4-n-octyloxybenzophenone or the like, or a combination comprising at least one of the foregoing light stabilizers. Light stabilizers may generally be used in an amount of about 0.1 to about 1.0 parts by weight based on 100 parts by weight of the total composition excluding any filler.

[0137] The thermoplastic composition may further comprise a plasticizer. For example, the plasticizer may comprise a (o-)phthalate such as dioctyl-4,5-epoxy-hexahydro (o-)phthalate, tris-(octyloxycarbonylethyl)isocyanurate, tristearin, epoxidized soybean oil, or the like, or a combination comprising at least one of the foregoing plasticizers. The plasticizer is generally used in an amount of about 0.5 to about 3.0 parts by weight based on 100 parts by weight of the total composition excluding any filler.

[0138] In a further aspect, the disclosed composition may include an antistatic agent. These antistatic agents may include, for example, glyceryl monostearate, sodium stearyl sulfonate, sodium dodecylbenzene sulfonate or the like, or a combination of the foregoing antistatic agents. On the one hand, carbon fibers, carbon nanofibers, carbon nanotubes, carbon black, or any combination of the foregoing may be used in a polymer resin containing a chemical antistatic agent to render the composition electrostatically dissipative.

[0139] Ultraviolet (UV) absorbers may also be present in the disclosed thermoplastic compositions. Exemplary UV absorbers may include, for example, hydroxybenzophenones; hydroxybenzotriazoles; hydroxybenzotriazines; cyanoacrylates; oxalanilides; benzo Oxazine; 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)-phenol (CYASORB TM 5411); 2-Hydroxy-4-n-octyloxybenzophenone (CYASORB TM531); 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine-2-yl]-5-(octyloxy)-phenol (CYASORB TM 1164); 2,2'-(1,4-phenylene)bis(4H-3,1-benzo Oxazine-4-one) (CYASORB TM UV-3638); 1,3-bis[(2-cyano-3,3-diphenylacryloyl)oxy]-2,2-bis[[(2-cyano-3,3-diphenylacryloyl)oxy]methyl]propane (UVINUL TM 3030); 2,2'-(1,4-phenylene)bis(4H-3,1-benzo oxazine-4-one); 1,3-bis[(2-cyano-3,3-diphenylacryloyl)oxy]-2,2-bis[[(2-cyano-3,3-diphenylacryloyl)oxy]methyl]propane; nano-sized inorganic materials such as titanium oxide, cerium oxide and zinc oxide, all with a particle size of less than 100 nanometers; or the like, or a combination comprising at least one of the foregoing UV absorbers. The UV absorber is generally used in an amount of 0.01 to 3.0 parts by weight based on 100 parts by weight of the total composition excluding any filler.

[0140] The thermoplastic composition may further include a lubricant. As an example, the lubricant may include, for example, a fatty acid ester such as an alkyl stearyl ester, such as methyl stearate or the like; a mixture of methyl stearate with a hydrophilic and hydrophobic surfactant, including polyethylene glycol polymers, polypropylene glycol polymers, and copolymers thereof, such as methyl stearate and polyethylene glycol-polypropylene glycol copolymers in a suitable solvent; or a combination comprising at least one of the foregoing lubricants. The lubricant may generally be used in an amount of about 0.1 to about 5 parts by weight based on 100 parts by weight of the total composition excluding any filler.

[0141] Anti-drip agents may also be used in the composition, such as fibril-forming or non-fibril-forming fluoropolymers such as polytetrafluoroethylene (PTFE). The anti-drip agent may be encapsulated by a rigid copolymer such as styrene-acrylonitrile copolymer (SAN). PTFE encapsulated in SAN is referred to as TSAN. In one example, the TSAN may contain 50 wt.% PTFE and 50 wt.% SAN based on the total weight of the encapsulated fluoropolymer. The SAN may contain, for example, 75 wt.% styrene and 25 wt.% acrylonitrile based on the total weight of the copolymer. Anti-drip agents such as TSAN may be used in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the total composition excluding any filler.

[0142] As an example, the disclosed composition may include an impact modifier. The impact modifier may be a chemically reactive impact modifier. By definition, a chemically reactive impact modifier may have at least one reactive group such that when the impact modifier is added to a polymer composition, the impact properties (expressed as IZOD impact value) of the composition are improved. In some examples, the chemically reactive impact modifier may be an ethylene copolymer having a reactive functional group selected from, but not limited to, anhydride, carboxyl, hydroxyl, and epoxy.

[0143] In further aspects of the present disclosure, the composition may include a rubbery impact modifier. The rubbery impact modifier may be a polymeric material that is capable of substantially recovering its shape and size after the force is removed at room temperature. However, the rubbery impact modifier should generally have a glass transition temperature of less than 0°C. In certain aspects, the glass transition temperature (T g ) can be lower than -5℃, -10℃, -15℃, among which T below -30℃ g Generally provide better performance. Representative rubbery impact modifiers can include, for example, functionalized polyolefin ethylene-acrylate terpolymers, such as ethylene-acrylate-maleic anhydride (MAH) or glycidyl methacrylate (GMA). The functionalized rubbery polymer can optionally contain repeating units in its backbone that are derived from monomers containing anhydride groups, such as maleic anhydride. In another case, the functionalized rubbery polymer can contain anhydride moieties that are grafted onto the polymer in a post-polymerization step.

[0144] In one example, the composition may include a core-shell copolymer impact modifier having about 80 wt.% of a core comprising poly(butyl acrylate) and about 20 wt.% of a shell comprising poly(methyl methacrylate). In another example, the impact modifier may include an acrylic impact modifier, such as an ethylene-ethyl acrylate copolymer having an ethyl acrylate content of less than 20 wt.% (such as EXL 3330 supplied by SABIC). The composition may include about 5 wt.% of an ethylene-ethyl acrylate copolymer.

[0145] In various aspects, compositions can be prepared according to various methods. The compositions of the present disclosure can be blended, compounded or otherwise combined with the aforementioned ingredients by various methods, which involves intimate mixing of the material with any other additives desired in the formulation. Due to the availability of melt blending equipment in commercial polymer processing facilities, melt processing methods can be used. In various further aspects, the equipment used in this melt processing method may include, but is not limited to, co-rotating and counter-rotating extruders, single screw extruders, co-kneaders, disc-pack processors, and various other types of extrusion equipment. In further aspects, the extruder is a twin-screw extruder. In various further aspects, the composition can be processed in an extruder at a temperature of about 180°C to about 350°C, specifically 250°C to 300°C.

[0146] Properties and products

[0147] In various aspects, the disclosed compositions combine IDP, polyetherimide and crystalline polymer to provide desired ESD properties while also maintaining a wide color space. The disclosed compositions also achieve balanced performance in electrical, aesthetic, impact and processing through the combined advantages of crystalline polymers and amorphous PEI polymers.

[0148] In certain aspects, the composition can exhibit electrostatic dissipative properties. For example, in certain aspects, the composition can exhibit less than 9×10 10 Surface resistance in ohms or 1×10 9 Ohm to 9×10 10 ohms, and when measured in accordance with ASTM D257, the composition may exhibit a surface resistance of 1×10 8 Up to 9×10 9 Volume resistivity in ohm cm.

[0149] As provided herein, the compositions of the present disclosure are colorable. Colorability can describe the ease with which a polymer composition can be colored. That is, the color of the polymer composition can be "light" enough to accept dyes, pigments, or other color treatments / additives that impart a desired hue to the composition. Conventional dissipative materials often include dark dissipative additives such as carbon fiber or carbon black. Therefore, the color space of conventional ESD materials can be limited. The disclosed compositions can alleviate these limitations because they achieve a color space of less than 9×10 10 Ohm or in 1×10 9 Ohm and 9×10 10ohms, while still being colorable. The values ​​disclosed herein have certain values ​​for certain colorimetric coordinates L*, a*, b*. "L* value" describes light-dark properties. If the L* value is 0, the object is black. If the L* value is 100, the object is white. The L* value is always positive. Compositions with L* values ​​away from the extremes (0 and 100) have more natural colors, which can be selected for specific applications or they can make the composition easier to color. The value of L* away from 0 and close to 100 will cause the composition to have a much wider "color space". "Color space" is the range of L* that can be achieved using optional colorants, pigments and / or dyes. L* can be measured using ASTM 2244 and a 10-degree observer; International Commission on Illumination (CIE) standard illuminant D65 illuminant (Standard Illuminant D65 illuminant); reflection including specular component (specular component included, SCI); and large aperture). The polymer composition can exhibit an L* color value of at least about 50, or at least about 80, or at least about 90 when measured using a spectrophotometer with D65 illumination in reflectance mode at a 10° observer.

[0150] The composition can exhibit a heat deflection temperature of at least 140° C. when tested in accordance with ASTM D648 at 0.45 megapascals (MPa) and a specimen thickness of 3.2 mm.

[0151] Therefore, these compositions are suitable candidates for consumer electronics / semiconductor / construction applications and can achieve key capabilities in ESD products and have customized colors. In addition, these compositions show the potential to replace ESD materials filled with carbon fiber, conductive carbon black, graphite, graphene, carbon nanotubes, etc. in the market.

[0152] In various aspects, the present disclosure relates to articles comprising the compositions herein. The compositions can be molded into useful shaped articles by various means, such as injection molding, extrusion, rotational molding, blow molding, and thermoforming to form articles. The compositions can be used to make articles requiring materials with high modulus, good flow, good impact strength, thermal conductivity, and reflectivity.

[0153] The advantageous properties of the compositions disclosed herein enable them to be suitable for a variety of uses. The molded articles may include, but are not limited to, personal computers, notebook and portable computers, mobile phone antennas and other such communication devices, medical applications, RFID applications, automotive applications, etc. In various further aspects, the articles may be suitable as computer and business machine housings, such as housings for high-end laptop personal computers, monitors, robots, handheld electronic device housings (such as housings or flashlight stands for smart phones, tablet computers, music devices), electrical connectors, LED heat sinks, and lighting equipment, wearable devices, decorations, household appliances, etc.

[0154] In a further aspect, non-limiting examples of fields in which thermoplastic compositions can be used can include electrical, electromechanical, radio frequency (RF) technology, telecommunications, automotive, aerospace, medical, sensors, military, and security. In a further aspect, thermoplastic compositions can also be found in overlapping fields, such as in electromechanical systems that integrate mechanical and electrical properties, which can be used, for example, in automotive or medical engineering.

[0155] In a further aspect, a suitable article can be an electronic device, an automotive device, a telecommunications device, a medical device, a security device, or an electromechanical device. In a further aspect, the article can be selected from a computer device, an electromagnetic interference device, a printed circuit, a Wi-Fi device, a Bluetooth device, a GPS device, a cellular antenna device, a smart phone device, an automotive device, a medical device, a sensor device, a security device, a shielding device, an RF antenna device, an LED device, and an RFID device. In a further aspect, the article can be selected from a computer device, a sensor device, a security device, an RF antenna device, an LED device, and an RFID device.

[0156] In another aspect, the molded articles can be used to make devices in the automotive field. In a further aspect, non-limiting examples of such devices in the automotive field that can use the disclosed blended thermoplastic composition inside the vehicle include adaptive cruise control, headlight sensors, windshield wiper sensors, and door / window switches. In a further aspect, non-limiting examples of devices in the automotive field that can use the disclosed blended thermoplastic composition outside the vehicle include pressure and flow sensors for engine management, air conditioning, crash detection, and exterior lighting equipment.

[0157] In further aspects, the disclosed compositions obtained can be used to provide any desired shaped, formed or molded articles. For example, the disclosed compositions can be molded into useful shaped articles by various means such as injection molding, extrusion, rotational molding, blow molding and thermoforming. As described above, the disclosed compositions are particularly suitable for manufacturing electronic components and devices. Therefore, according to some aspects, the disclosed compositions can be used to form articles such as printed circuit board carriers, burn-in test sockets, hard disk drive flexible brackets, etc.

[0158] aspect

[0159] Aspect 1A. A polymer composition comprising: from about 1 wt.% to about 99 wt.% of a polyetherimide resin; from about 1 wt.% to about 70 wt.% of a crystalline polyester resin; from about 0.1 wt.% to about 50 wt.% of an inherently dissipative polymer; and from about 0.001 wt.% to about 10 wt.% of a transesterification inhibitor, wherein the polymer composition exhibits a relative humidity of less than 9×10 10 Surface resistance in ohms or 1×10 9 Ohm to 9×10 10 ohms, and when measured in accordance with ASTM D257, the polymer composition exhibits a surface resistance of 1×10 8 Up to 9×10 9 ohm-cm, and wherein the combined weight percent value of all components does not exceed about 100 wt.%, and all weight percent values ​​are based on the total weight of the polymer composition.

[0160] Aspect 1B. A polymer composition consisting of: about 1 wt.% to about 99 wt.% of a polyetherimide resin; about 1 wt.% to about 70 wt.% of a crystalline polyester resin; about 0.1 wt.% to about 50 wt.% of an inherently dissipative polymer; and about 0.001 wt.% to about 10 wt.% of a transesterification inhibitor, wherein the polymer composition exhibits a relative humidity of less than 9×10 10 Surface resistance in ohms or 1×10 9 Ohm to 9×10 10 ohms, and when measured in accordance with ASTM D257, the polymer composition exhibits a surface resistance of 1×10 8 Up to 9×10 9 ohm-cm, and wherein the combined weight percent value of all components does not exceed about 100 wt.%, and all weight percent values ​​are based on the total weight of the polymer composition.

[0161] Aspect 1C. A polymer composition consisting essentially of: from about 1 wt.% to about 99 wt.% of a polyetherimide resin; from about 1 wt.% to about 70 wt.% of a crystalline polyester resin; from about 0.1 wt.% to about 50 wt.% of an inherently dissipative polymer; and from about 0.001 wt.% to about 10 wt.% of a transesterification inhibitor, wherein the polymer composition exhibits a relative humidity of less than 9×10 10 Surface resistance in ohms or 1×10 9 Ohm to 9×10 10 ohms, and when measured in accordance with ASTM D257, the polymer composition exhibits a surface resistance of 1×10 8 Up to 9×10 9 ohm-cm, and wherein the combined weight percent value of all components does not exceed about 100 wt.%, and all weight percent values ​​are based on the total weight of the polymer composition.

[0162] Aspect 2. The polymer composition of any one of Aspects 1A-1C, wherein the polyetherimide resin has a thermal conductivity of about 8 cm at 340°C / 5.0 kg. 3 / 10min to about 20cm 3 / 10min flow rate.

[0163] Aspect 3. The polymer composition of any one of claims 1A-2, wherein the polyester resin comprises polybutylene terephthalate, polyethylene terephthalate, or 1,4-cyclohexanedimethy!-1,4-cyclohexanedicarboxylate, or a combination thereof.

[0164] Aspect 4. The polymer composition of any one of claims 1A-3, wherein the inherently dissipative polymer is ion-doped.

[0165] Aspect 5. The polymer composition of any of claims 1A-3, wherein the inherently dissipative polymer comprises a nylon-based multi-block copolymer doped with ions.

[0166] Aspect 6. The polymer composition of any one of claims 1A-5, wherein the inherently dissipative polymer has a relative humidity of about 1×10 7 Surface resistance.

[0167] Aspect 7. The polymer composition of any of claims 1A-6, wherein the transesterification inhibitor comprises monozinc phosphate, a mixture of mono- and di-stearate phosphate esters, or a combination thereof.

[0168] Aspect 8. The polymer composition of any one of claims 1A-7, wherein the polymer composition exhibits a 1×10 6 Up to 1×10 10 Surface resistance in ohms.

[0169] Aspect 9. The polymer composition of any of claims 1A-8, wherein the polymer composition exhibits an L* color value of at least about 80 when measured on a spectrophotometer with D65 illumination in a 10° observer in reflectance mode.

[0170] Aspect 10. The polymer composition of any of claims 1A-9, wherein the polymer composition is free or substantially free of carbon fibers, conductive carbon black, graphite, graphene, carbon nanotubes, and carbon nanostructures.

[0171] Aspect 11. The polymer composition of any of claims 1A-10, wherein the polymer composition further comprises an additional crystalline polymer comprising polyethylene or polypropylene.

[0172] Aspect 12. The polymer composition of any of Claims 1A-10, wherein the polymer composition further comprises an impact modifier.

[0173] Aspect 13. The polymer composition of any of Claims 1A-12, wherein the polymer composition exhibits a heat distortion temperature of at least 140°C when tested according to ASTM D648 at 0.45 MPa and 3.2 mm specimen thickness.

[0174] Aspect 14. The polymer composition of any of Claims 1A-13, wherein the composition further comprises an optical brightening agent.

[0175] Aspect 15. The polymer composition of any of claims 1A-14, wherein the polymer composition further comprises an additive.

[0176] Aspect 16. The polymer composition of any of Aspects 1A-15, wherein the polyetherimide is an aromatic polyetherimide.

[0177] Example

[0178] Detailed aspects of the present disclosure are disclosed herein; it should be understood that the disclosed aspects are merely examples of the present disclosure that can be implemented in various forms. Therefore, the specific structural and functional details disclosed herein should not be interpreted as limitations, but merely as a basis for teaching those skilled in the art to use the present disclosure. The following specific examples will enable the present disclosure to be better understood. However, they are given only as guidance and are not intended to be limiting.

[0179] The following examples are provided to illustrate the compositions, methods and properties of the present disclosure. These examples are illustrative only and are not intended to limit the present disclosure to the materials, conditions or method parameters set forth herein.

[0180] General Materials and Methods

[0181] The compositions described in the following examples are prepared from the components shown in Table 1 (shown in Figure 1 middle).

[0182] The compositions described in the examples herein were prepared from the components shown in Table 1. The formulations were prepared by extruding the pre-blended components using a twin screw extruder. The polymer base resins (polycarbonate and polyester), IDP, inhibitors and additives were pre-mixed and fed through the main feed port. The extrudate was cooled in a water bath before pelletizing. A Toshiba TM The components were compounded using a TEM-37BS Twin Screw Extruder at a temperature between 240°C and 250°C. The compounding and molding conditions used are shown in Tables 2 and 3 (shown in Tables 2 and 3, respectively). Figure 2 and Figure 3 The processing temperature is kept as low as possible because the IDP degrades at conventional processing temperatures of PEI (specifically, at temperatures above 300° C.). This is a technical hurdle that has been overcome by the unique compositions as disclosed herein that enable low temperature processing of inherently high heat and low flow PEI.

[0183] The molded samples (shown in Table 4) were tested according to the criteria shown in Table 4. Figure 4 Center). ColorEye in D65 lighting TM Optical properties such as color and reflectance are measured on the 7000A in reflection mode with a 10° observer. Evaluations are performed according to the International Commission on Illumination (CIE) - providing values ​​for the colorimetric coordinates L*, a*, b*. The coordinates correspond to different color attributes: a* for red and green; b* for yellow and blue; and L* for whiteness. L* values ​​range between 0 and 100. Lower L* values ​​correspond to darkness of the material, while L* values ​​greater than 70 correspond to materials that appear white to the naked eye.

[0184] Notched Izod impact ("NII") testing was performed according to ASTM D256 on molded samples (bars) of 63.5 mm x 12.7 mm x 3.2 mm at 25° C. The data are reported in J / m.

[0185] Heat distortion temperature was determined at 0.45 MPa using 3.2 mm thick specimens (127 mm x 12.7 mm) in a flatwise specimen orientation according to ASTM D 648. Data are provided in °C.

[0186] Comparative sample C-1 was prepared to evaluate the performance of formulations with and without an ester exchange inhibitor. Comparative sample C-0 also did not contain the polyester PBT 315. Table 5 (shown in Figure 5 The formulations and observed surface resistances are presented in Figure 3 .

[0187] As shown in EX-1-4 in Table 5, crystalline polymers PBT or PET reduce processing temperatures (compounding and molding temperatures of 240°C in Tables 2 and 3) because of the lower viscosity of these polymers. Conventional ESD / antistatic formulations containing carbon fiber-filled PEI (control sample C-1, commercially available as EE004) require processing temperatures exceeding 330°C compared to EX-1-4. This results in much higher energy consumption. The samples of the present invention are processed at much lower temperatures, which keeps the IDP intact during this low temperature processing, thereby maintaining the ESD / antistatic characteristics. The surface resistivity of EX1-EX3 in Table 5 is at least 1×10 10 Ohms, indicating that it is suitable for antistatic applications. In addition, the volume resistivity is 1×10 8 Up to 1×10 9 Ohmic levels, meaning there is the potential to further reduce surface resistance if additional IDP can be expelled from the core to the part surface. This was demonstrated by increasing the PBT content to 15 wt.% (as in EX-4). Here, the surface resistance was further reduced to 2.3×10 9 Ohms / sq. High thermal characteristics were also maintained as evidenced by the high HDT (140-158°C) shown in Table 5. Since EX 1-4 was able to be processed at 240°C, high flow was also achieved, and the MVR of EX-4 was 1.52 at 240°C / 2.16kg.

[0188] The optical properties of the samples were also evaluated by visual inspection with the naked eye as well as by spectrophotometer.Another important feature of the formulations is the colorless appearance of all the blends listed.

[0189] like Fig. 6A As shown in FIG. 1 , a plaque of the PEI / PBT / IDP blend (left) appears very light brown upon visual inspection, allowing for further coloring. In fact, a plaque composed of the disclosed composition appears even whiter than the pure PEI resin, which appears more amber. Conventional ESD PEI materials (shown in FIG. Figure 6BThe L* values ​​shown in Table 5 quantitatively demonstrate the potential of the samples of the present invention to be colored. EX-1 has an L* value of 82.6, which means that the potential for further coloring is high. In contrast, the control sample C-1 (carbon fiber filled PEI) exhibits an L* value of 26. This dark color inhibits any further color space.

[0190] The patentable scope of the present disclosure is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.

Claims

1. A polymer composition comprising: 40 wt. % to 80 wt. % of a polyetherimide resin; 1 wt.% to 40 wt.% of a crystalline polyester resin; 15 wt.% to 45 wt.% of an inherently dissipative polymer; and 0.001 wt.% to 10 wt.% of an ester exchange inhibitor, wherein the polymer composition exhibits a 1×10 9 Ohm to 9×10 10 ohms, and when measured in accordance with ASTM D257, the polymer composition exhibits a surface resistance of 1×10 8 Up to 9×10 9 volume resistivity in ohms cm, and The combined weight percentage values ​​of all components do not exceed 100 wt.%, and all weight percentage values ​​are based on the total weight of the polymer composition.

2. The polymer composition according to claim 1, wherein the polyetherimide resin has a thermal conductivity of 8 cm at 340°C / 5.0 kg. 3 / 10min to 20cm 3 / 10min flow rate. 3 . The polymer composition according to claim 1 , wherein the crystalline polyester resin comprises polybutylene terephthalate, polyethylene terephthalate, or 1,4-cyclohexanedimethylene-1,4-cyclohexanedicarboxylate, or a combination thereof.

4. The polymer composition of claim 1, wherein the intrinsically dissipative polymer is ion-doped.

5. The polymer composition of claim 1, wherein the inherently dissipative polymer comprises a nylon-based multi-block copolymer doped with ions.

6. The polymer composition of claim 1, wherein the inherently dissipative polymer has a 1×10 7 Surface resistance.

7. The polymer composition of claim 1, wherein the transesterification inhibitor comprises monozinc phosphate, a mixture of mono- and di-stearate phosphates, or a combination thereof.

8. The polymer composition of claim 1, wherein the polymer composition exhibits an L* color value of at least 80 when measured on a spectrophotometer with D65 illumination in a 10° observer in reflective mode.

9. The polymer composition of claim 1, wherein the polymer composition is free of carbon fibers, conductive carbon black, graphite, graphene, carbon nanotubes, and carbon nanostructures.

10. The polymer composition of claim 1, wherein the polymer composition further comprises an additional crystalline polymer comprising polyethylene or polypropylene.

11. The polymer composition of claim 1, wherein the polymer composition further comprises an impact modifier.

12. The polymer composition of any one of claims 1-11, wherein the polymer composition exhibits a heat distortion temperature of at least 140°C when tested according to ASTM D648 at 0.45 MPa and a specimen thickness of 3.2 mm.

13. The polymer composition of any one of claims 1-11, wherein the composition further comprises an optical brightening agent.

14. The polymer composition according to any one of claims 1 to 11, wherein the polymer composition further comprises an additive.

15. The polymer composition of any one of claims 1-11, wherein the polyetherimide is an aromatic polyetherimide.

Images