Single-component polyurethane waterproof coating for decoration and preparation method ofsingle-component polyurethane waterproof coating

Abstract

The invention relates to a single-component polyurethane waterproof coating for decoration and a preparation method of the single-component polyurethane waterproof coating. The single-component polyurethane waterproof coating is prepared from the following components in parts by mass: polyether polyol with the functionality of 2, polyester polyol with the functionality of 2, a plasticizer, kaolin, talcum powder, organic bentonite, titanium dioxide, carbodiimide diisocyanate, a catalyst and a defoaming agent. Compared with the prior art, the waterproof coating disclosed by the invention has the following beneficial effects that the tensile property and mechanical properties of the waterproof coating after coating are measured according to the GB / T19250-2013I type standard, and the waterproof coating meets the standard requirements. According to detection, the product can pass the A-class standard requirement, no formaldehyde or acetaldehyde is released in harmful substances, the release of TVOC (28d) is about 50 mu g / m < 3 >, and the release of TSVOC (28d) is about 30 mu g / m < 3 >.

Description

technical field [0001] The invention relates to a one-component polyurethane waterproof coating for decoration and a preparation method thereof. Background technique [0002] With the improvement of living standards, consumption is gradually becoming more rational, rather than blindly following the trend. The yearning for a better life is gradually increasing. For decoration, people pay more attention to health and environmental protection. The most important thing in the decoration is the coating. It is well known that the previous polyurethane waterproof coatings contain many harmful substances such as coal tar, formaldehyde, benzene series, etc., which seriously affect people's health. With the country's emphasis on environmental protection, non-standard products such as coal tar on the market no longer exist, but the existing national standard of polyurethane waterproof coatings still cannot meet the requirements of decoration, although the solvent in polyurethane coatin...

AI Technical Summary

Problems solved by technology

The most important thing in the decoration is the coating. It is well known that the previous polyurethane waterproof coatings contain a variety of harmful substances such as coal tar, formaldehyde, benzene series, etc., which seriously affect people's health.

With the country's emphasis on environmental protection, non-standard products such as coal tar on the market no longer exist, but the existing national standard of polyurethane waterproof coatings still cannot meet the requirements of decoration, although the solvent in polyurethane coatings is in the process of film formation It volatilizes quickly, and it can usually be completed in one month, but we should pay more attention to the non-volatile harmful substances in the paint, such as whether it contains harmful heavy metals such as lead, cadmium, chromium, mercury (used to increase hiding and make pigments); Contains phthalic plasticizers (used to reduce the viscosity of paint, as a dispersion system, etc.); whether it contains arsenic (used in the production of paint pigments); paints that are not bad for a long time may also contain formaldehyde and mercury; most of these harmful substances It is non-volatile and can be harmful for a long time, especially for children, the elderly, pregnant women and other people with low immunity.

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