Borate type synthetic brake fluid with ultralow low-temperature viscosity and preparation method thereof

Abstract

The invention provides a borate type synthetic brake fluid with ultralow low-temperature viscosity. The borate type synthetic brake fluid consists of triethylene glycol monomethyl ether borate, triethylene glycol monomethyl ether, triethylene glycol monobutyl ether, an antioxidant, a corrosion inhibitor and a pH value regulator. The invention also provides a preparation method of the borate type synthetic brake fluid with ultralow low-temperature viscosity. According to the invention, the lower limit of low-temperature fluidity of an existing borate type brake fluid is broken through; meanwhile, Class6 in International Standard ISO4925:2005 Road vehicles-specification of non-petroleum-base brake fluids for hydraulic systems and HZY6 grade product specification requirements in national standard GB12981-2012 Motor Vehicle Brake Fluids are met, and it can also be guaranteed that braking is sensitive and timely under extremely cold weather conditions; the dry boiling point and the wet boiling point are high and stable, and air resistance is not prone to occurring; the lubricity is good, and the braking is stable; corrosion to metal materials of a brake system is small, swelling to rubber parts is small, and oxidation resistance and thermal stability are excellent.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to an automobile brake fluid, in particular to an ultra-low and low-temperature viscosity borate-type synthetic brake fluid and a preparation method thereof. Background technique [0002] Automobile brake fluid, also known as brake fluid, is a functional fluid used to transmit braking energy in the hydraulic braking system of an automobile. When the driver brakes, the momentum is transmitted from the piston of the brake master cylinder to each sub-cylinder of the wheel through the brake fluid, pushing the friction plates of each brake shoe (caliper) to expand, and pressing against the brake disc fixed on the wheel to produce friction braking. move to achieve the purpose of stopping the vehicle. [0003] Since automobiles began to use brake fluid in the 1930s, the development of automobile brake fluid has gone through three main development stages: alcohol type, mineral oil type a...

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Problems solved by technology

[0010] The object of the present invention is to provide a kind of ultralow low temperature viscosity borate type synthetic brake fluid and its preparation method, described this ultralow low temperature viscosity borate type synthetic brake fluid and its preparation method should solve the existing The base fluid preparation process in the borate brake fluid technology is cumbersome, the diluent swells the rubber cup, and the alcohol-based water-absorbing rubber expansion inhibitor reduces the high-temperature air resistance of the brake fluid, and the compatibility between the additive and the base fluid is poor. The -40°C kinematic viscosity does not meet the international standard ISO4925:2005 "Road Vehicles - Non-petroleum-based brake fluid specification" Class6 and my country's GB12981-2012 "Motor Vehicle Brake Fluid" national standard HZY6 grade product specification requirements

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