Special high performance environmental-protection type polyurethane waterproof coating material for railway roads and bridges, and preparation method thereof

Abstract

The present invention relates to a special high performance environmental-protection type polyurethane waterproof coating material for railway roads and bridges. The polyurethane waterproof coating material is a double component polyurethane waterproof coating material comprising a component A and a component B, wherein the component A comprises liquefied diphenylmethane-diisocyanate, polyether glycol, polyether triol and the like, and the component B comprises a curing agent, a modified filler, a pigment, a liquid filler, a composite additive and the like. According to the present invention, the liquefied diphenylmethane-diisocyanate, the liquid curing agent and other novel raw materials are adopted so as to avoid introduction of harmful substances and potential carcinogen substances, such that production and use of polyurethane waterproof coating materials are safe and environmentally friendly; and due to introduction of the modified filler, the prepared polyurethane waterproof coating material has characteristics of short surface drying time, short actual drying time, excellent tensile strength, excellent elongation at break, and other comprehensive performances, and completely meets requirements in the passenger dedicated line bridge concrete deck waterproof layer provisional technical conditions.

Description

technical field

[0001] The invention relates to a polyurethane waterproof coating, in particular to a high-performance and environment-friendly polyurethane waterproof coating specially used for railway bridges of passenger dedicated lines. Background technique

[0002] Polyurethane waterproof coating is a new type of polymer waterproof coating, which has been widely used in waterproofing projects because of its excellent physical and chemical properties. According to the survey conducted by the China Building Waterproof Materials Industry Association, the proportion of polyurethane waterproof coatings used in waterproofing projects is 17.62%. However, the performance indicators of ordinary polyurethane waterproof coatings are difficult to meet the application requirements of some special fields. For example, the waterproofing of concrete bridge decks of railway bridges is different from the roof and ground waterproofing of ordinary buildings, and also different from th...