The invention provides a crystalline wholly aromatic polyester that is capable of improving slidability and thermal stability at the time of molding, while having heat resistance. The crystalline wholly aromatic polyester is a polycondensate of an aromatic dicarboxylic acid and an aromatic diol, wherein a structural unit derived from the aromatic dicarboxylic acid comprises structural unit (I) of formula (1):

##STR00001##

structural unit (II) of formula (2):

##STR00002##

and structural unit (III) of formula (3):

##STR00003##

and a structural unit derived from the aromatic diol comprises structural unit (IV) of formula (4):

##STR00004##

wherein 30 mol %≤structural unit (I)≤40 mol %; 5 mol %≤structural unit (II)≤10 mol %; 5 mol %≤structural unit (III)≤10 mol %; and 45 mol %≤structural unit (I)+structural unit (II)+structural unit (III)≤50 mol %.

The invention relates to polymeric-inorganic nanoparticle compositions and preparation processes thereof. The invention also relates to an additive and lubricant compositions comprising these polymeric-inorganic nanoparticle compositions, as well as to the use of these polymeric-inorganic nanoparticle compositions in an oil lubricant formulation to improve tribological performance, in particular to improve extreme pressure performance and friction reduction on metal parts.

The invention relates to polymeric-inorganic nanoparticle compositions and preparation processes thereof. The invention also relates to an additive and lubricant compositions comprising these polymeric-inorganic nanoparticle compositions, as well as to the use of these polymeric-inorganic nanoparticle compositions in an oil lubricant formulation to improve tribological performance, in particular to improve extreme pressure performance and friction reduction on metal parts.

A binder composition includes a dispersion medium and a group of binder particles. The group of binder particles is dispersed in the dispersion medium. The group of binder particles include a polymer material. The polymer material includes a constitutional unit originated from vinylidene difluoride. The group of binder particles has a number-based particle size distribution. The particle size distribution satisfies the following conditions: “0.19≤X≤0.26”, “0.69≤Y≤0.76”, and “0≤Z≤0.05”. Here, “X” represents a frequency of particles each having a particle size of less than or equal to 40 μm. “Y” indicates a frequency of particles each having a particle size of more than 40 μm and less than or equal to 110 μm. “Z” indicates a frequency of particles each having a particle size of more than 110 μm and less than or equal to 250 μm.

The invention provides formulations and masterbatches of a polymeric material and XRF-identifiable markers, for producing transparent elements including a polymer and at least one XRF-identifiable marker for a variety of industrial uses.

A phosphorescent polycarbonate resin composition comprising, with respect to 100 parts by mass of a polycarbonate resin (A): 0.8 to 20 parts by mass of a red light-emitting phosphorescent material (B1) as a phosphorescent material (B), wherein an L* value measured in accordance with a following method (X) is 65 or more,

the method (X) including: under conditions of a cylinder temperature of 300° C., a mold temperature of 120° C., and a molding cycle of 45 seconds, measuring, with a color-difference meter, the L* of a 3 mm-thick portion of a specimen (in a form of a three-stage plate having a width of 50 mm, a length of 90 mm, and thicknesses of 1 mm, 2 mm, and 3 mm) obtained by injection molding of the phosphorescent polycarbonate resin composition, under following conditions based on JIS 28722:

Reflection measurement: D65 light source, 10-degree field of view

Measurement port: 30 ϕ

Specimen material holder: White

The present disclosure relates to a liquid crystal polyester resin composition and an electronic component material comprising the same with low dust characteristics. Specifically, the present disclosure relates to a liquid crystal polyester resin composition for preventing dust generation comprising 65% by weight or more and 85% by weight or less of a liquid crystal polyester resin; more than 0.5% by weight and less than 10% by weight of a transition metal compound containing a Group 6 element of the periodic table; 2% by weight or more and 10% by weight or less of a barium compound; 2% by weight or more and 10% by weight or less of an organic filler; and 12% by weight or more and 30% by weight or less of a filler.

A polymer composite comprising: (a) quantum dots; (b) polymerized units of a compound of formula (I) wherein R1 is hydrogen or methyl and R2 is a C6-C20 aliphatic polycyclic substituent; and (c) a light stabilizer compound comprising two 1-alkyloxy-2,2,6,6-tetramethyl-4-piperidinyl substituents. ##STR00001##

A resin composition includes: a binder resin made of a thermosetting resin; an additive dispersed in the binder resin, wherein the additive includes PTFE (polytetrafluoroethylene), and at least one of graphite and MoS.sub.2, an average particle size of each of the additive is less than 10 μm, and an average particle size of the PTFE is larger than the average particle size of graphite and MoS.sub.2.

A thermoplastic component may include a matrix component (A) and a filler component (B). The matrix component (A) may include a polyetheretherketone and the filler component (B) may include inorganic particles and carbon-containing particles. The overall composition may include equal or different portions, as filler component (B), of hydrophobic silicon dioxide, carbon fibres, titanium dioxide particles, graphite particles, and a particulate lubricant selected from divalent metallic sulfides and alkaline earth metal sulfates.