55results about How to "Improves reversion resistance" patented technology

The invention discloses a europium-base multiple-ligand rubber vulcanizing accelerator and a preparing method thereof. Europium is the rare earth element in synthesis, and 4 kinds of ligands are included, wherein the ligands 1 and 2 are accelerator groups with excellent vulcanizing acceleration effects, the ligand 3 is citric acid forming strong coordination with the rare earth element, and the ligand 4 is triethanolamine improving solubleness of the accelerator in a rubber material. The method is simple and feasible, requires no protection of inert gases, is mild in the preparation condition and generates no harmful gas; the multiple-ligand rare earth vulcanizing accelerator has excellent solubleness in rubber, the vulcanization and scorch time is long, the vulcanization curve is excellent in flatness, and no toxicity, odor or pollution is generated; the accelerator substituting the conventional frequently used system adopting zinc oxide, stearic acid and accelerator together can be applied to high-performance tires and other rubber products.

The invention belongs to the technical field of rubber production, and particularly relates to an abrasion-resistant base compound for solid tyres of heavy trucks. The abrasion-resistant base compound for the solid tyres of the heavy trucks comprises raw materials in parts by weight as follows: natural rubber, carbon black N339, aromatic oil, poly-2,3,4-trimethyl-1,2-dihydroquinoline, N-(1,3-dimethyl)-N'-phenyl-p-phenylenediamine, zinc stearate, N-tert-butylbenzothiazole-2-sulfenamide, tetramethyl-thiuram sulfide, sulfur, an anti-scorching agent and P-tert-butylphenol formaldehyde resin. The base compound has the higher modulus and the good abrasion resistance, and meanwhile, the base compound is better in reversion resistance and low in hysteresis loss.

The invention discloses a holmium-based multiple-ligand rubber vulcanization accelerator and a preparation method thereof. A rare earth element in synthesis is holmium comprising four ligands, the ligands 1 and 2 are accelerator groups having excellent vulcanizing and accelerating effects, the ligand 3 is palmitic acid capable of accelerating solubility of the accelerator in a sizing material, and the ligand 4 is alpha-methylacrylic acid capable of forming strong ligands together with the rare earth element. The method is simple, convenient and easy, and does not require protection of inert gas, conditions during the preparation process are moderate, and no harmful gases can be generated. The multiple-ligand rare earth vulcanization accelerator has a good solubility in rubber, the vulcanizing and scorching time is long, the vulcanization curve is excellent in flatness, and toxin, odour and pollution are avoided. The accelerator can replace a conventionally used zinc oxide, octadecanoic acid and accelerator combined-use system and can be applied to high-performance tires and other rubber products.

The invention discloses an erbium-based multi-ligand vulcanization accelerator for rubber and a preparation method thereof. A rare earth element in the synthesis is erbium which contains 4 ligands, wherein a ligand 1 and a ligand 2 are accelerant groups with a good vulcanization accelerating effect; a ligand 3 is citric acid which can form strong coordination with the rare earth element; a ligand 4 is triethanolamine which can improve the solubility of the accelerator in rubber materials. The preparation method is simple, convenient and feasible, does not need inert gas shielding, is moderate in conditions of the preparation process, and generates no harmful gas. The multi-ligand rare earth vulcanization accelerator has good solubility in rubber,is long in vulcanization and scorching time and excellent in flatness of vulcanization curve, and is non-toxic, odorless and pollution-free. The accelerator can be applied to high performance tire and other rubber products instead of the conventional frequently-used blending system of zinc oxide, stearic acid and an accelerator.

The invention discloses an Nd-based multi-ligand vulcanization accelerator and a preparation method thereof. In synthesis, an Nd element is used as a rare earth element, and four ligands are contained; the ligand 1 and the ligand 2 are accelerator radicals with good vulcanization acceleration effects, the ligand 3 is phenanthroline capable of forming strong coordination with the rare earth element, and the ligand 4 is acrylic acid capable of improving the solubility of the accelerator in a sizing material. The preparation method is simple, convenient and feasible, does not need inert gas shielding, is mild in preparation process condition, and has no harmful gas generation. The multi-ligand rare earth vulcanization accelerator has good solubility in rubber, and is long in vulcanization and scorching time, good in vulcanization curve flatness, non-toxic, odorless and pollution-free. The vulcanization accelerator can replace a currently used zinc oxide, stearic acid and accelerator combination system, and is applicable to high performance tires and other rubber products.

The invention discloses a lanthanum-base multiple-ligand vulcanization accelerant and a preparation method thereof. The rare earth element in synthesis is cerium element which contains 4 ligands; the ligand 1 and the ligand 2 are accelerant groups with favorable vulcanization accelerating effect; the ligand 3 is triethanolamine which can improve the solubility of the accelerant in rubber; the ligand 4 is phenanthroline which can form a strong coordination with the rare element; the preparation method is simple and feasible; inert gas shielding is not needed; conditions in the preparation process are mild; no harmful gas is generated in the preparation process; the multiple-ligand vulcanization accelerant has favorable solubility in rubber; vulcanization scorch time is long; the flatness of vulcanization curve is high; the multiple-ligand vulcanization accelerant is non-toxic, odourless and pollution-free; the accelerant can replace a blending system of zinc oxide, stearic acid and the accelerant; the accelerant can be applicable in high performance tires and other rubber products.