1002 results about "Mooney viscosity" patented technology

A golf ball includes a hot-molded product of a rubber composition comprising a base rubber composed of (a) 20-100 wt % of a polybutadiene having a high cis-1,4 content, a minimal 1,2 vinyl content, and a viscosity η of up to 600 mPa·s at 25° C. as a 5 wt % toluene solution, and satisfying a certain relationship between Mooney viscosity and polydispersity index Mw/Mn, in combination with (b) 0-80 wt % of another diene rubber, (c) an unsaturated carboxylic acid, (d) an organosulfur compound, (e) an inorganic filler, (f) an organic peroxide, and optionally, (g) an antioxidant. The hot-molded product has a difference in JIS-C hardness between the center and surface thereof of up to 15 units. The composition and hardness characteristics of the hot-molded product provide the golf ball with a solid comfortable feel upon impact and an excellent rebound.

The instant disclosure is directed to a thermoplastic vulcanizate composition comprising a dynamically-cured rubber; from about 20 to about 300 parts by weight of a thermoplastic resin per 100 parts by weight rubber and from about 30 to about 250 parts by weight additional oil per 100 parts by weight rubber; wherein the rubber comprises a multimodal polymer composition cured with a curing agent, the multimodal polymer composition comprising 45 to 75 wt% of a first polymer fraction and 25 to 55 wt % of a second polymer fraction, each comprising ethylene, a C₃-C₁₀ alpha-olefin, and a non-conjugated diene, wherein the polymer fractions have been polymerized using a Ziegler-Natta catalyst system, wherein the first polymer fraction has a Mooney viscosity of greater than or equal to about 150 ML(1+4@125° C.), and the second polymer fraction has a Mooney viscosity of about 20 ML to about 120 ML; and about 10 phr to about 50 phr of an extender oil. A method of producing the thermoplastic vulcanizate is also disclosed.

The invention provides a highly-abrasion-resistant butadiene-acrylonitrile-rubber vulcanized rubber and a preparation method thereof. The highly-abrasion-resistant butadiene-acrylonitrile-rubber vulcanized rubber comprises the following components according to parts by weight: 100 parts of butadiene-acrylonitrile rubber, 3-8 parts of active agent, 1-6 parts of antiager, 2-6 parts of erucamide, 50-150 parts of reinforcing filler and 3-8 parts of vulcanizing accelerator, wherein acrylonitrile content in the butadiene-acrylonitrile rubber is 34-41 percent by weight, and Mooney viscosity (ML[1+4] of the butadiene-acrylonitrile rubber is 45-70. The preparation method of the butadiene-acrylonitrile-rubber vulcanized rubber comprises the steps of A. mixing and processing and B. recycled processing and vulcanization. The butadiene-acrylonitrile-rubber vulcanized rubber has reasonable component mixing and higher abrasion resistance. The highly-abrasion-resistant butadiene-acrylonitrile-rubber vulcanized rubber prepared according to the method has high elongation and long service life.

The present invention provides a one-piece solid golf ball having excellent rebound characteristics and good shot feel, while maintaining excellent processability and durability. The present invention relates to a one-piece solid golf ball formed from a rubber composition comprising a mixture consisting of polybutadiene (a) synthesized using nickel-containing catalyst and polybutadiene (b) synthesized using cobalt-containing catalyst and hydroquinone or derivatives thereof as a vulcanization stabilizer, wherein a Mooney viscosity and a weight ratio of the polybutadienes (a) and (b), an amount of the vulcanization stabilizer, a center hardness (the minimum hardness in the golf ball) and surface hardness of the golf ball, and a difference between the maximum hardness and minimum hardness in the golf ball are adjusted to a specified range.

Disclosed herein is a multimodal polymer composition comprising 45 to 75 wt % of a first polymer fraction, 25 to 55 wt % of a second polymer fraction, and from 10-50 phr of an extender oil. The multimodal polymer composition has an overall Mooney viscosity of less than 90 ML(1+4@125° C.), and each polymer fraction comprises an ethylene, C₃-C₁₀ alpha-olefin, non-conjugated diene polymer, wherein the first polymer fraction has a Mooney viscosity of greater than or equal to about 150 ML(1+4@125° C.), the second polymer fraction has a Mooney viscosity from about 20 to about 120 ML(1+4@125° C.). A process for making the multimodal polymer composition comprising a process utilizing two or more reactors in series is also disclosed.

The present invention provides a solid golf ball comprising a hot-molded product of a rubber composition comprising (a) 100 parts by weight of a polybutadiene synthesized using a rare-earth catalyst and having a cis-1,4 content of at least 60% and a 1,2 vinyl content of at most 2%, having a viscosity η at 25° C. as a 5 wt % solution in toluene of up to 600 mPa·s, and having Mooney viscosity (ML₁₊₄ (100° C.)) of more than 30, (b) 0.01 to 0.5 parts by weight of a sulfur, (c) 10 to 60 parts by weight of an unsaturated carboxylic acid and/or a metal salt thereof, (d) 0.1 to 5 parts by weight of an organosulfur compound, (e) 5 to 80 parts by weight of an inorganic filler, and (f) 0.1 to 5 parts by weight of an organic peroxide, wherein the hot-molded product has a difference in JIS-C hardness between the center and surface thereof of more than 20 and up to 40. The solid golf balls of the invention have a soft feel upon impact and excellent rebound characteristics. Moreover, the solid golf balls are improved in flight performance by making its spin rate reduced when shot with a driver.

The invention relates to a low cis-polybutadiene rubber as well as a preparation method and application thereof. The preparation method is characterized in that in a polymerization system formed by connecting at least two polymerization reaction kettles in series, in a non-polar solvent containing a structure regulating agent, an stable single-functionality initiator is adopted to initiate the polymerization of polybutadiene and then a conventional chain-end coupling technology is combined, so as to prepare the low cis-polybutadiene rubber having high Mooney viscosity and low SV (styrene viscosity) value (5% rubber-styrene solution viscosity at 25 DEG C). The properties of the prepared low cis-polybutadiene rubber are as follows: (1) the content of the vinyl group in a monomer unit is 8-14%wt; (2) a number-average molecular weight range is 80,000-110,000; (3) the Mooney viscosity ML[1+4] at the temperature of 100 DEG C is 45-65; (4) molecular weight distribution is 1.5-1.8; and (5) the SV value is 0.04-0.059Pa.s. The low cis-polybutadiene rubber synthesized by using the method can be applied to the field of plastic modification, and is especially suitable for preparation of a high-impact high-gloss grade polystyrene (PS) resin.

Highly branched compositions including: (i) from about 96 wt % to about 99.9 wt % metallocene catalyzed ethylene propylene diene derived units; and (ii) from about 0.1 wt % to about 4 wt % multifunctional monomer derived units, wherein the highly branched composition has: (a) a Mooney viscosity ML (1+4) at 125° C. of about 30 to 100 MU, (b) a Mooney relaxation area MLRA of about 100 to about 1000, (c) a branching index, g′(vis) of less than about 0.9, (d) a phase angle, δ, of less than about 55 degrees at a complex modulus of 10 kPa, measured at 190° C., and (e) a degree of shear thinning greater than about 0.95, measured at 190° C., are disclosed herein. Homogeneous blends including this composition are also described. Processes to make the highly branched composition and the homogeneous blend are also described herein.

High performance, low pollution and regenerated metal coordinative cross linked acrylonitrile-butadiene rubber comprises acrylic nitrile 18 - 50wt%, acrylonitrile-butadiene rubber with Mooney viscosity of 20 - 100, liquid butyronitrile, carboxylic butyronitrile, hydrogenated butyronitrile, powdery butylonitrile, a butyronitrile contained mixture or/and nitrile containing copolymer or grafts and halides of transition metals or/and oxygen containing salts, and is obtained by cross reacting at 200deg.C for 5 - 60minutes. Its advantages include no harmful materials used in production, good mechanical performance without carbon black added, oil-resistant, good adhesion with metals and regenerating ability.

The present invention provides a multi-piece solid golf ball having little unevenness in physical properties. The present invention relates to a multi-piece solid golf ball comprising a center, an intermediate layer formed on the center, and a cover covering the intermediate layer, wherein the intermediate layer is composed of one or more layers mainly containing a rubber component, the rubber component for the intermediate layer has a Mooney viscosity of 25 to 40 ML(1+4)100° C.

The invention described is a process for the preparation of dynamically vulcanized thermoplastic elastomers comprising melt processing under shearing conditions in melt reaction extruder, A) at least one thermoplastic resin, B) at least one vulcanizable gas-phase elastomer having a Mooney viscosity (ML₁₊₄(125° C.)) of from about 65 to about 450, C) a curing agent or agents, and D) process oil, wherein said process oil D) is added to the extruder in at least three oil injection positions located a) at least one location before or within the first 15% of the total length of the extruder; b) at least one other location prior to, at or within 10% total extruder length after the onset of the vulcanization of said gas-phase elastomer; and c) at least one location subsequent to the location of the point at which the vulcanization of said gas-phase elastomer is substantially completed; wherein the direct oil injection locations into the extruder are positioned at or immediately before one or more distributive mixing elements, which distributive mixing elements are immediately followed by one or more dispersive mixing elements. Thermoplastic vulcanizates capable of being extrusion molded with a smooth surface and low surface spot count, in addition to excellent elastomeric properties, are obtained through the use of the process described.

The foamed laminate based on olefin according to the present invention is composed of a substrate layer of a foamed body made of either an ethylenic thermoplastic elastomer comprising a polyethylene resin and an ethylene/α-olefin copolymer having a Mooney viscosity ML₁₊₄ (100° C.) of 90-250 and an ethylene content of 70-95 mole % or an ethylenic thermoplastic elastomer composition comprising 100 parts by weight of an olefinic thermoplastic elastomer and 1-20 parts by weight of an olefinic thermoplastic resin and, under lamination thereon, a skin layer made of either an ultrahigh molecular weight polyolefin resin having an intrinsic viscosity of 3.5-8.3 dl/g or made of an olefinic thermoplastic elastomer composition comprising an olefinic thermoplastic elastomer and a lubricant. The foamed laminate according to the present invention is easy in recycled use, obtainable at a high foaming expansion ratio with soft hand touch and is superior in the appearance, abrasion resistance, durability and sliding performance.

The invention discloses an automobile door glass guide groove seal bar adhesive material and applications thereof. Crude adhesive with high mooney viscosity and low ethylene content is adopted as a main raw material; a great quantity of high-structure fillers and high-flash-point paroline are added, and semi-effective vulcanized system vulcanized by sulphur is matched, so that the heated contraction rate of seal bar materials is controlled to be within 1%. The conventional physical performance of seal bars can meet the performance requirement of automobile door glass guide groove seal bars on materials, and the secondary baking step required in the subsequent process of the existing seal bars is omitted, so that energy sources are saved, and the waste caused by scrappage for poor size is eradicated. The adhesive material provided by the invention is used for preparing the automobile door glass guide groove seal bars, and is further applied to automobile doors and automobiles.

The present invention relates to an impact resistant composition having a polyolefin, an elastomer with a Mooney viscosity of greater than about 40 and an elastomer with a Mooney viscosity of less than about 40. The present invention also relates to an impact resistant composition having a polyolefin and a coupled elastomer with a Mooney viscosity of greater than about 40. Further, the present invention relates to compositions having a polypropylene blend with a heat of crystallization of greater than about 150° C., a coupled ethylene-α-olefin with a Mooney viscosity of greater than about 40 and an ethylene-α-olefin with a Mooney viscosity of between about 30 and about 40.

The invention relates to a novel homogenous neodymium-based rare earth catalyst, and a preparation method of the catalyst and application in polymerization of conjugated diene. The synthesis method of the catalyst is simple and easy to control, thus the obtained catalyst has high activity and good stability. By using the inventive homogenous neodymium-based rare earth catalyst for catalyzing polymerization of isoprene, the polymerization process is stable, easy to control, and suitable for continuous operation, and polyisoprene with a cis structure content higher than 98% and adjustable Mooney viscosity range within 60-100 can be synthesized.

The method for producing a modified conjugated diene based (co)polymer, according to the present invention comprises a step of reacting a conjugated diene based (co)polymer with a metal halide compound to obtain a modified conjugated diene based (co)polymer, the conjugated diene based (co)polymer having a weight-average molecular weight of 150,000 to 2,000,000 and being obtained by bonding, to a polymer having at least a conjugated diene unit, an alkoxysilyl group and an optionally protected primary amino group. The method can satisfactorily produce a conjugated diene based (co)polymer which has a high Mooney viscosity, excellent shape stability and good processability.

A resin composition for impact-resistant moldings with high low-temperature impact strength, and an air bag cover made of this resin composition are provided. The resin composition, or a thermoplastic elastomer composition for impact-resistant moldings, is produced by a process comprising subjecting 15 to 40% by weight of component (A), 15 to 40% by weight of component (B) and 20 to 70% by weight of component (C) (taking the total of the components (A), (B) and (C) as 100% by weigh) to a dynamic heat treatment in the presence of a crosslinking agent, said components being as specified below:

(A): an ethylene-α-olefin-non-conjugated diene copolymer rubber having a density of 850 to 900 kg/m³, a Mooney viscosity (ML₁₊₄(100° C.)) of 30 to 150, and an ethylene unit content of 30 to 90;

(B): an ethylene-α-olefin-non-conjugated diene copolymer rubber having a density of 850 to 900 kg/m³ and a Mooney viscosity (ML₁₊₄(100° C.)) of 30 to 150, and an ethylene unit content which is 0.50 to 0.95 time that of the component (A) or an iodine value which is 0.25 to 0.95 time that of the component (A);

(C): a polypropylene resin.

An object is to provide a rubber composition that is capable of significantly improving mechanical properties. Another object is to provide a rubber belt that has excellent mechanical properties. Provided are a rubber composition, and a rubber belt formed by using the rubber composition, which is incorporated with a rubber component containing an ethylene/α-olefin copolymer, and an organically treated clay mineral organically treated with an organic ammonium ion, wherein the ethylene content of the ethylene/α-olefin copolymer is in a range of 60-85% by mass, the rubber component has a Mooney viscosity of 10-55 at 125° C., and the organically treated clay mineral is incorporated in 6-30 parts by mass per 100 parts by mass of the rubber component.