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.