A method for preparing a butyronitrile rubber powder-based polyvinyl chloride (PVC) thermoplastic elastomer and a use of the butyronitrile rubber powder-based PVC thermoplastic elastomer in preparing automotive parts are provided. The method includes: activating a wasted nitrile butadiene rubber (NBR) powder; plasticizing one of NBR and chloroprene rubber (CR) to obtain a plasticized rubber; dispersing the activated NBR fine rubber powder with one of PVC and chlorinated polyethylene (CPE) in a kneader evenly to obtain a mixture; adding the mixture and pine tar into the plasticized rubber, then mixing evenly to obtain a mixed plastic; adding various compounding agents into the mixed plastic and dispersing evenly to perform cross-linking reaction, thereby obtaining the butyronitrile rubber powder-based PVC thermoplastic elastomer. By using the wasted NBR powder as a main material, which turns waste into treasure and has low cost, and the butyronitrile rubber powder-based PVC thermoplastic elastomer has excellent comprehensive performance.

A millimeter-wave radar housing material capable of being laser welded, and a preparation method therefor, which belong to the technical field of millimeter-wave radar housing manufacturing. The millimeter-wave radar housing material specifically comprises the following components in parts by weight: 50-90 parts of polypropylene, 10-50 parts of glass fiber, 0.2-0.8 part of a nucleating agent, 0.5-1 part of a compatibilizer, 0.1-0.5 part of a black colorant, 0.1-0.5 part of an antioxidant, and 0.1-0.8 part of a light stabilizer. The radar housing material disclosed by the present invention has the advantages of low dielectricity, being lightweight, high strength and high heat resistance, can transmit a near-infrared light beam, and has laser weldability.

This is to achieve low temperature toughness in a blow molded product, blow molding properties such as mold transferability, suppression of burning, suppression of surface unevenness, drawdown property and dimensional stability of the blow molded product, and blister resistance in combination.

A polyamide resin composition of the present invention comprises 60 to 85% by mass of a polyamide resin (A), 20% by mass or more of an olefin-based ionomer (B) and 5 to 20% by mass of an impact resistant material (C) in 100% by mass of the polyamide resin composition, and contains 20% by mass or more of an aliphatic copolymerized polyamide (A-1) in 100% by mass of the polyamide resin (A).

The present invention provides a chlorinated polyvinyl chloride resin that provides a molded article having excellent heat cycle characteristics and excellent weather resistance, as well as a resin composition for molding and a molded article each including the chlorinated polyvinyl chloride resin. Provided is a chlorinated polyvinyl chloride resin, containing two components including a A.sub.30 component and a B.sub.30 component, the A.sub.30 component and the B.sub.30 component being determined by measuring the resin by a solid echo method using pulse NMR at 30° C. to give a free induction decay curve of .sup.1H spin-spin relaxation, and subjecting the free induction decay curve to waveform separation into two curves derived from the A.sub.30 component and the B.sub.30 component in order of shorter relaxation time using the least square method, and having a ratio of T5.sub.B to T.sub.B [T5.sub.B/T.sub.B] of 96% or more and 120% or less, where T.sub.B is a relaxation time of the B.sub.30 component and T5.sub.B is a relaxation time of the B.sub.30 component after heating at 200° C. for five minutes.

The present invention discloses an encapsulation composition, an encapsulation film including the encapsulation composition, and an electronic device module. The encapsulation composition includes a polymer matrix, a tackifier and a free radical initiator. Based on 100 parts by weight of the polymer matrix, the polymer matrix includes 5 to 100 parts by weight of highly branched polyethylene (P1), 0 to 95 parts by weight of an ethylene-α-olefin copolymer, and 0 to 70 parts by weight of an ethylene-polar monomer copolymer. The highly branched polyethylene (P1) is an ethylene homopolymer having a branch structure and has a degree of branching of not less than 40 branches/1,000 carbon atoms. A density of the ethylene-α-olefin copolymer is not higher than 0.91 g/cm.sup.3. The encapsulation composition provided by the present invention has good volume resistivity, aging resistance, processability and low cost.

The present invention relates to a polymer composition comprising a polymer comprising methyl methacrylate, (meth)acrylic acid and styrene monomers. In particular, the present invention relates to a polymer composition comprising a polymer comprising methyl methacrylate, (meth)acrylic acid and styrene monomers, said composition having particularly advantageous compromises of heat-resistant, fluidity, scratch-resistant and chemical-resistant properties. The present invention also relates to a molded or extruded object comprising a polymer comprising methyl methacrylate, (meth)acrylic acid and of styrene monomers, and the use of these objects.

The present invention discloses a rubber composition, production method thereof and a rubber product using the same. The rubber composition includes a rubber matrix and essential components. Based on 100 parts by weight of the rubber matrix, the rubber matrix includes a branched polyethylene with a content represented as A, in which 0<A≤100, and an EPM and an EPDM with a total content represented as B, in which 0≤B<100; and the essential components include 1.5 to 10 parts of a crosslinking agent and 40 to 200 parts of a reinforcing filler. The reinforcing filler includes carbon black and silica and can also include any one or more of calcium carbonate, talcum powder, calcined clay, magnesium silicate, and magnesium carbonate, wherein the content of the carbon black is 5 to 100 parts, and the content of the silica is 5 to 60 parts. The rubber composition is used for producing rubber product with better yield and tear strength and service performance. The rubber product include high-strength insulation compound for preparing wire and cable, waterproof coil, and high-temperature resistant conveyor belt.

The present disclosure provides an epoxidized natural rubber composite and a preparation process thereof, and relates to the technical field of rubber materials. The epoxidized natural rubber composite provided by the present disclosure comprises the following preparation raw materials in parts by weight: 100 parts of epoxidized natural rubber, 1˜30 parts of peanut meal, 0.05˜0.8 parts of surfactants, 0.1˜4 parts of coagulant and 0.2˜12 parts of vulcanization processing aids. The present disclosure utilizes essential amino acids and non-essential amino acids contained in peanut meal to improve the aging resistance of the epoxidized natural rubber. After hot air aging, ozone aging and ultraviolet aging treatments, both the tensile strength retention rate and the elongation at break retention rate of the epoxidized natural rubber composites of the present disclosure can be kept above 83%.

A communication cable includes an insulated wire including a conductor and a covering layer covering the conductor, the covering layer being made of an insulator, and a sheath covering an outer circumferential surface of the insulated wire, the sheath including a resin composition containing a polyolefin and a thermoplastic elastomer. A tensile modulus of elasticity of the sheath is 500 MPa or less, and a mass increase rate of the sheath is less than 50% by mass when the sheath is immersed in a diisononyl phthalate at 100° C. for 72 hours.

A resin composition includes 100 parts by weight of a polyolefin and 20 parts by weight to 150 parts by weight of a homopolymer of Formula (1). The resin composition is useful for making different articles, including a prepreg, a resin film, a laminate or a printed circuit board, which may achieve excellent multi-layer board thermal resistance and thermal resistance after moisture absorption and achieve high glass transition temperature, low dissipation factor, and low Z-axis ratio of thermal expansion. ##STR00001##