Abstract:
The present invention provides: a rubber composition obtained by mixing 30 to 80 parts by mass of carbon black, whose DBP absorption value and CTAB adsorption specific surface area satisfy the following relational formulas (I) and (II), into 100 parts by mass of a rubber component, wherein macrodispersion D(%) of the carbon black in the rubber composition is 1% or more and less than 10%, and the rubber composition has high performance and excellent processability such as roll workability and the like; and a rubber product such as a tire having reduced rolling resistance and excellent fatigue resistance and abrasion resistance. DBP absorption value cm 3 / 100 g
Abstract:
The present invention provides a method for producing a rubber composition for tire tread, which is prepared by mixing 100 parts by mass of a rubber component containing 60 to 80 parts by mass of a natural rubber and 20 to 40 parts by mass of a modified conjugated dienic polymer having one or more functional groups having another atom than carbon and hydrogen, and 40 to 60 parts by mass of carbon black having a nitrogen adsorption specific surface area (N 2 SA) of 40 to 95 m 2 /g and a hydrogen release rate of 0.37% by mass or more based on 100 parts by mass of the rubber component, wherein the temperature of the rubber composition at the time of discharge in the kneading step for mixing carbon black therein is 170°C or higher, a rubber composition obtained according to the production method, and a tire using the rubber composition. According to the production method for a rubber composition, the heat generation property of the rubber composition can be reduced, and the dynamic storage elastic modulus thereof can be increased. By using the rubber composition obtained according to the production method as tread, there can be provided a tire having not only reduced rolling resistance but also improved abrasion resistance, anti-tear performance (tear resistance) and cut resistance.
Abstract:
A cross linkable elastomeric composition comprising silica-epoxidized natural rubber (ENR) elastomer as masterbatch, to produce crosslinkable rubber products used in industrial applications preferably the outer layer of solid tire that is capable of providing low rolling resistance and good wet grip properties, the silica-filled ENR masterbatch is a ready compounded masterbatch which is prepared via latex stage preparation which comprises antioxidant, oil emulsion, silica dispersion and ENR latex.
Abstract:
The present invention concerns precipitated calcium carbonate particles being at least partially in the form of nanofibers or nanochain like agglomerates, wherein the particles are at least partially coated with at least one coating agent, use of such precipitated calcium carbonate particles and a process for the manufacture of such precipitated calcium carbonate particles.
Abstract:
The present invention provides a rubber composition for tires which enables a balanced improvement in rolling resistance, abrasion resistance, and wet-skid performance. The present invention relates to a rubber composition for tires, including a rubber blend including a diene rubber A modified with a specific acrylamide compound, and a diene rubber B modified with either a combination of a specific silicon or tin compound and a specific modifying compound or with the modifying compound, the combined rubbers A and B having a weight average molecular weight of 300,000 to 1, 400, 000; and a specific silica.
Abstract:
Precipitated silica having a BET specific surface area in the range of from 35-700 m2/g, a CTAB specific surface area in the range of from 30 to 400 m2/g, and a content of polycarboxylic acid and/or carboxylate groups, expressed as total carbon content, of at least 0.15 wt %
Abstract:
Provided is a pneumatic tire having an excellent finished bonding surface between the tread and its adjacent wing or sidewall while ensuring properties required for tires, such as wet grip performance, abrasion resistance, and resistance to degradation over time. Included is a pneumatic tire including a tread and a wing or sidewall adjacent to the tread, wherein the tread is formed from a tread rubber composition that has an amount of aluminum hydroxide having an average particle size of 0.69 µm or smaller and a N 2 SA of 10-50 m 2 /g of 1-60 parts by mass, and a net sulfur content derived from crosslinking agents of 0.56-1.25 parts by mass, each per 100 parts by mass of the rubber component, the wing or sidewall is formed from a wing or sidewall rubber composition that has a net sulfur content derived from crosslinking agents of 1.3-2.5 parts by mass per 100 parts by mass of the rubber component, and the net sulfur contents derived from crosslinking agents in the tread rubber composition and the wing or sidewall rubber composition satisfy a specific relationship.
Abstract:
The present invention relates to the use of a surface-reacted calcium carbonate as an anti-blocking agent in polymer(s) containing compositions, wherein the surface-reacted calcium carbonate is a reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and one or more H 3 O + ion donors in an aqueous medium, wherein the carbon dioxide is formed in situ by the H 3 O + ion donors treatment and/or is supplied from an external source, an anti-blocking agent comprising surface-reacted calcium carbonate or a combination of surface reacted calcium carbonate and mineral material, a method for controlling the blocking of polymer(s) containing compositions, a polymer(s) containing composition comprising surface reacted calcium carbonate or a combination of surface reacted calcium carbonate and mineral material, a coating composition comprising such polymer(s) containing composition, as well as a substrate coated with such coating composition.
Abstract translation:本发明涉及表面反应的碳酸钙作为含有组合物的聚合物中的防粘连剂的用途,其中表面反应的碳酸钙是天然研磨的或沉淀的碳酸钙与二氧化碳的反应产物, 一种或多种H 3 O +离子供体,其中二氧化碳通过H 3 O +离子供体处理原位形成和/或从外部来源提供,包括表面反应的防粘连剂 碳酸钙或表面反应的碳酸钙和矿物材料的组合,用于控制含有聚合物的组合物的封闭的方法,包含表面反应的碳酸钙的组合物或表面反应的碳酸钙和矿物的组合的聚合物 材料,包含这种含聚合物的组合物的涂料组合物,以及涂覆有这种涂料组合物的基材。