Moisture-curing liquid waterproofing composition for free-smashing bricks suitable for joint pretreatment and repair

Abstract

The invention discloses a non-shattering brick moisture-curing liquid waterproof composition (C) suitable for pretreatment and repair of beautiful joints, which comprises: an alkoxysilyl group having a structure of formula (I) composed of different chain segments Modified polymer (A), catalyst (C1) selected from metal-containing catalysts, guanidine and imidium, and a combination of catalysts (C2) comprising units of formula (II), active diluent (D) having a structure of formula (III): P 1 -{L 1 ‑[C(=O)‑L 2 ] z -(CR 1 2 ) a ‑Si(OR 2 ) b R 3 (3‑b)} c (I); B f Si(OR 4 ) d R 5 e o (4‑f‑d‑e) / 2 (II); R 8 ‑[Si(OR 6 ) g R 7 (3‑g) ] h (III). Wherein, the alkoxy silicon-based modified polymer (A) contains A1 and A2, and the sum of A2 and A1 is not less than 50 parts by mass. The moisture-curing liquid waterproof composition (C) has excellent adhesive compatibility with the two-component epoxy resin beauty joint agent, and can have a good repair effect on the cracking and peeling of the base surface after the application of the beauty joint agent .

Description

technical field [0001] The invention relates to a brick-shatter-free moisture-curing liquid waterproof composition which can be used for pretreatment and repair of beautiful joints, in particular to a moisture-curing composition based on a siloxane modified polymer; it belongs to the field of material technology. Background technique [0002] For housing construction, waterproofing is one of the most basic requirements. With the continuous improvement of living standards, people have higher and higher requirements for kitchen and bathroom functions, design standards and aesthetics. Usually, the floors of kitchens and bathrooms of newly built houses should be waterproofed according to certain requirements, and the seams of tiles should be beautifully seamed. If the waterproof layer is intact, there will be no leakage after decoration. However, due to unprofessional waterproofing or the poor quality of waterproof materials and seam sealants used during house decoration, or th...

AI Technical Summary

Problems solved by technology

If the coating is damaged, there is no self-repair function, and the film is formed by volatilization of water, and the construction is greatly affected by the ambient temperature and humidity;

[0007] (3) Inorganic repair fluids mainly rely on sodium silicate and other solutions or sols to form precipitations with calcium ions and magnesium ions in the waterproof base material and then adsorb on the surface or gaps, but there are slow water-stop penetration and penetration Defects of small depth, poor water resistance, and poor durability;

[0008] (4) The non-shattering brick waterproof liquid of the reactive system is mainly based on two-component amine-cured epoxy, two-component polyurethane, two-component polyurea, etc. On the one hand, this kind of non-reactive brick waterproofing is more reliable than non-reactive waterproofing, but this kind of two-component product needs to be diluted with a solvent to reduce the viscosity before it can penetrate, and the mixing operation of the two components is more troublesome, and it is easy to mix the ratio, resulting in Curing too fast, small penetration depth or incomplete curing or even impossible curing

[0009] After the above types of smashing-free brick waterproofing system are constructed, the construction of the beautifying agent will often cause problems of curing and bonding, which will cause the problem of cracking and degumming of the beautifying agent in the later use process.

Images