Bicomponent carbamide polyaspartate hard adhesive and use method and application thereof

Abstract

The invention belongs to the field of preparation of adhesives and relates to a bicomponent carbamide polyaspartate hard adhesive and a use method and application thereof. The adhesive is prepared from a main agent, i.e., a component A and a curing agent, i.e., a component B, wherein the component A is prepared from the ingredients in parts by weight: 80-95 parts of polyaspartate, 0.1-0.5 part of substrate humectant, 2-5 parts of oxazolidine water absorbent, 5-10 parts of plasticizer and 0.1-0.5 part of antifoamer; the component B and the component A are equal in equivalent proportioning ratio; the curing agent is prepared from an HDI trimer and a hydroxyl resin modified curing agent which are in the weight ratio of (10 to 30): (70 to 90). According to the bicomponent carbamide polyaspartate hard adhesive and the use method and application thereof, asphalt substrates and inorganic antiskidding aggregates can be excellently bound, and meanwhile, the problem that the existing polyurethane and epoxy materials are poor in ultraviolet aging resistance is solved; the bicomponent carbamide polyaspartate hard adhesive has good ultraviolet aging resistance; meanwhile, aspartate resin and this kind of curing agents are relatively high in curing rate, so that sufficient operating time and fast curing are ensured, and problems, temporary closure and opening of roads are solved.

Description

technical field [0001] The invention belongs to the field of adhesive preparation, and in particular relates to a two-component polyaspartate urea hard adhesive and its application method, and its application to colored anti-slip road surfaces as anti-slip colored sand, ceramic particles and foundation Adhesives for concrete or asphalt bases. Background technique [0002] The colored anti-slip pavement is mainly used in road environments that require high friction deceleration and anti-slip, such as bus stops, sharp turns on the road, and up and down bridge ramps. The main method is to first spread a layer of adhesive with a thickness of about 1-2mm on the road surface, and then immediately sprinkle a layer of ceramic or other hard aggregates with a size of 2-5mm. After the adhesive is naturally cured, the aggregate is fixed and integrated with the road, relying on the aggregate with large particles raised on the surface to increase the coefficient of friction. [0003] At...

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly three kinds of materials used as this kind of adhesive, one is a two-component polyurethane adhesive based on polyester, polyether polyol and polymeric MDI curing agent, and the other is ordinary solvent-free self-leveling epoxy adhesive. There is also a pre-polymerized active acrylic resin, an MMA adhesive that initiates polymerization through peroxide, but these three adhesives have some problems in actual use, and their use is limited.

Although polyurethane adhesives have high strength and good heat resistance, they are widely used, but because polymerized MDI is used as a curing agent, the material has poor UV aging resistance and a short service life. Rolling a layer of UV-resistant topcoat as a protective layer increases the difficulty of construction; the UV aging resistance of epoxy materials is worse than that of polyurethane and is more brittle, and it is easy to cause cracking and damage in low temperature environments; MMA adhesives have good weather resistance. The service life is long, but there is a problem of poor construction. Since the reaction is free radical chain growth, the reaction speed is fast and the adjustability is poor, which is very easy to cause gelation and scrapping. The construction requirements are strict and the construction efficiency is low. MMA monomer is used as the active material. Thinner, strong odor and high toxicity, far less widely used than polyurethane and epoxy

Images