Provided are: a rubber composition for treads which contains a diene rubber in the rubber component and can simultaneously achieve blowing resistance during dry running, wet grip performance and abrasion resistance; and a pneumatic tire including a tread formed from the rubber composition for treads. The rubber composition contains: a diene rubber including styrene-butadiene rubber; zinc dithiophosphate; an inorganic filler including at least one selected from the group consisting of: a compound of the formula: mM.xSiO.sub.y.zH.sub.2O wherein M represents at least one metal selected from the group consisting of Al, Mg, Ti, Ca, and Zr, or an oxide or hydroxide of the metal, m represents an integer of 1-5, x represents an integer of 0-10, y represents an integer of 2-5, and z represents an integer of 0-10; magnesium sulfate; and silicon carbide, and having a BET value of 5-120 m.sup.2/g and a linseed oil absorption of 30-80 mL/100 g; and sulfur, wherein, per 100 parts by mass of the diene rubber, there are 0.2-15 parts by mass of the zinc dithiophosphate, 1-70 parts by mass of the inorganic filler, and less than 2.5 parts by mass of zinc oxide.

A polytetrafluoroethylene resin composition comprising 67 to 75 volume %, preferably 69 to 72 volume %, of a polytetrafluoroethylene resin and 33 to 25 volume %, preferably 31 to 28 volume %, of a filler having an average particle diameter of 45 to 80 μm, preferably 50 to 75 μm. The seal ring obtained from the polytetrafluoroethylene resin composition of the present invention can prevent the cut cross-sections of the seal ring abutting portion from being pressed by oil pressure and fixing to each other. Therefore, the seal ring is effectively used as an oil seal ring used as a sealing material applied to vehicle CVTs and power steering devices.

A polymer composition comprising: (a) from 50% by volume to 99% by volume, preferably from 70% by volume to 95% by volume, of at least one homopolymer or copolymer of ethylene; (b) from 1% by volume to 50% by volume, preferably from 5% by volume to 30% by volume, of at least two fillers having different thermal conductivity; (c) from 100 ppm to 4000 ppm, preferably from 200 ppm to 3500 ppm of at least one fluoropolymer; the sum of (a)+(b) being 100. Said polymer composition can be used as a phase change material (PCM), in particular for thermal energy storage (TES), more in particular for the storage of solar energy.

A resin composition is provided which includes a resin component, a fibrous filler, and a plate-like filler. With respect to 100 parts by mass of the resin component, the content of the fibrous filler is from 30 parts by mass or more to 100 parts by mass or less, the content of the plate-like filler is from 20 parts by mass or more to 80 parts by mass or less, and the total content of the fibrous filler and the plate-like filler is from 50 parts by mass or more to 180 parts by mass or less. The resin component includes an amorphous resin, and the content of the amorphous resin is from 60 parts by mass or more to 100 parts by mass or less.

The present invention provides a damping material and a damping sheet made therefrom. Specifically, the present invention provides a damping material comprising 10-50 wt % of a block copolymer elastomer; 5-40 wt % of a specific-length fiber; 5-45 wt % of a thermoplastic non-elastomeric polymer; 5-50 wt % of a tackifier; 0-50 wt % of an inorganic filler; and 0-30 wt % of a flame retardant based on the total weight of the damping material. The damping material and the damping sheet made therefrom according to the present invention have high damping properties, a wide application temperature range and a low density, and can serve as a novel damping material in the current automobile, rail transit, construction and electrical appliance industries.

Embodiments of the present disclosure include laser transmissive compositions and related methods. The laser transmissive compositions may include one or more of the following components: (a) a polyester compound; (b) a filler; (c) a non-aromatic organic nucleating agent; (d) at least one of a chain extender and a branching agent, wherein the chain extender/branching agent includes two or more reactive groups attached thereto; (e) at least one heat stabilizer; (f) at least one process stabilizer; (g) at least one lubricant; and (h) one or more further additives.

The present invention aims to obtain a resin composition with low thermal expansion property by suppressing functional deterioration in negative thermal expansion property when a negative thermal expansion material is added to a thermoplastic resin and heat-processed. The present invention provides a resin composition including metal oxide particles and a thermoplastic resin, both having a negative thermal expansion property. The negative thermal expansion of the particles is attributed to a crystal phase transition, which is driven by electron transfer between the constituent metals, and a covalent protective layer that inhibits the electron transfer is formed between the particles and the thermoplastic resin.

The present invention aims to obtain a resin composition with low thermal expansion property by suppressing functional deterioration in negative thermal expansion property when a negative thermal expansion material is added to a thermoplastic resin and heat-processed. The present invention provides a resin composition including metal oxide particles and a thermoplastic resin, both having a negative thermal expansion property. The negative thermal expansion of the particles is attributed to a crystal phase transition, which is driven by electron transfer between the constituent metals, and a covalent protective layer that inhibits the electron transfer is formed between the particles and the thermoplastic resin.

An organic-inorganic hybrid composition including a polymer having a triazine ring structure in a main chain of the polymer (A); an inorganic particulate (B); and a surface-treating agent having a triazine ring structure represented by Formula (1)(C): ##STR00001## wherein, in Formula (1), R.sub.1 is a carboxyl group, a phosphoric acid group, a sulfo group, or a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted amino group, wherein a number median diameter (Dn50) of the inorganic particulate (B) is greater than or equal to about 1 nm and less than or equal to about 20 nm.

An organic-inorganic hybrid composition including a polymer having a triazine ring structure in a main chain of the polymer (A); an inorganic particulate (B); and a surface-treating agent having a triazine ring structure represented by Formula (1)(C): ##STR00001## wherein, in Formula (1), R.sub.1 is a carboxyl group, a phosphoric acid group, a sulfo group, or a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted amino group, wherein a number median diameter (Dn50) of the inorganic particulate (B) is greater than or equal to about 1 nm and less than or equal to about 20 nm.