Anti-stick waterproof board and preparation method thereof

Abstract

The invention provides an anti-stick waterproof board with excellent water resistance. The anti-stick waterproof board consists of a base material layer, a self-adhesive layer and an isolating membrane layer which are sequentially compounded into a whole, wherein the self-adhesive layer is positioned between the base material layer and the isolating membrane layer; the isolating membrane layer does not need to be removed, and disappears after reacting with poured concrete; the self-adhesive layer has the thickness of 0.2-0.4mm, and is prepared from the following components in parts by weight: 2-10 parts of chlorobutyl rubber, 20-30 parts of high-molecular-weight butyl rubber with a viscosity average molecular weight of 400-500 thousands, 30-50 parts of medium-molecular-weight polyisobutylene with a viscosity average molecular weight of 50-100 thousands, 20-40 parts of low-molecular-weight polyisobutylene with a viscosity average molecular weight of 1000-3000, 0.5-10 parts of vinyl-terminated silicone rubber and 1-5 parts of an antioxidant; the vinyl-terminated silicone rubber is terminal vinyl silicone rubber and has a viscosity average molecular weight of 50-300 thousands, and the mole percent of vinyl is more than 1%. The invention also provides a preparation method of the anti-stick waterproof board.

Description

technical field [0001] The invention belongs to the field of waterproof materials, and in particular relates to a new anti-adhesive waterproof board and a preparation method thereof. Background technique [0002] Waterproof board is a kind of waterproof material commonly used in projects such as tunnels, water conservancy, garbage dumps and sewage pools. It is usually composed of a substrate layer, an adhesive layer and an isolation layer in sequence. According to the material of the substrate layer, it can be divided into HDPE Waterproof board, PVC waterproof board, LDPE waterproof board, EVA waterproof board, ECB waterproof board, etc. The construction of the waterproof board generally adopts the pre-laid anti-adhesive process, that is, the waterproof board covered with the adhesive layer is laid empty on the base surface (the adhesive layer is far away from the base surface), and then the structural concrete is poured (suitable for basements, sewage pools, etc.), or Fix ...

AI Technical Summary

Problems solved by technology

The peel strength of the composite waterproof layer after immersion in water for 28 days is only 2.0-3.5N / mm after bonding with the post-cast concrete, and there is no data on the peel strength of immersion in water for 56 days or even 90 days, so it cannot be supported that it can be applied to concrete in mountain tunnels Lining structure

In addition, the patent document does not disclose the test data of the actual full-scale anti-channeling performance of the composite waterproof layer, especially the test results of the self-adhesive layer under unfavorable conditions to prevent water channeling under pressure. Under the double action of water pressure, the bonding performance is stable and keeps no water channeling

Images