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Elastic waterproof sealant, preparation method thereof, and roof waterproof structure formed by eastic waterproof sealant

A waterproof, sealing and elastic technology, applied in the direction of roof cladding, adhesives, building roofs, etc., can solve problems such as hazards, achieve the effects of reduced maintenance, wide bonding applications, and good construction performance

Active Publication Date: 2015-07-08
JIANGSU CUMT DAZHENG SURFACE ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the currently produced sealants use phthalate plasticizers and tin-based catalysts. Because they will cause serious harm to the environment and the human body, phthalate-based plasticizers and tin-based catalysts have been banned in Europe. Catalysts, etc. as chemicals that are strictly prohibited or restricted
Although there is an invention patent "an environmentally friendly silicone modified polyether building sealant" (public number: CN102086366A) published in China on June 8, 2011, which uses polyether polyols instead of phthalates as additives. Plastics are used to reduce the harm of sealants to the human body, but organotin catalysts are still used in the preparation process, which cannot truly achieve environmental protection and pollution-free

Method used

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  • Elastic waterproof sealant, preparation method thereof, and roof waterproof structure formed by eastic waterproof sealant
  • Elastic waterproof sealant, preparation method thereof, and roof waterproof structure formed by eastic waterproof sealant
  • Elastic waterproof sealant, preparation method thereof, and roof waterproof structure formed by eastic waterproof sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of elastic sealant:

[0029] (a) Weigh STP-E10, 15 parts by weight; STP-E15, 20 parts; dioctyl terephthalate, 5 parts, put each component into a mixer and mix evenly, and reserve it for later use;

[0030] (b) Weigh nano-calcium carbonate, 40 parts by weight; fumed silica, 0.1 part; titanium dioxide, 0.5 part; carbon black, 0.1 part; benzotriazole ultraviolet absorber, 0.1 part; hindered amines Light stabilizer, 0.1 part, each component is added to the mixture obtained in step (a), stirred evenly and set aside;

[0031] (c) Heat the stirred mixture obtained in step (b) to 100°C, evacuate to -0.1MPa, stir at high speed for 60min at a revolution speed of 30rpm, and a dispersion speed of 2500rpm, cool down to 35°C, and add 0.5 parts by weight of Vinyltrimethylsilane was stirred at low speed for 20 minutes at a revolution speed of 15pm and a dispersion speed of 500rpm, then 0.5 part of γ-(ethylenediamino)propyltrimethoxysilane was added, and the elastic waterpr...

Embodiment 2

[0034] Preparation of elastic sealant:

[0035] (a) Weigh STP-E30, 20 parts by weight; STP-E35, 25 parts; dioctyl terephthalate, 8 parts, put each component into a mixer and mix evenly, and keep it for later use;

[0036] (b) Weigh nano-calcium carbonate, 50 parts by weight; fumed silica, 0.7 parts; titanium dioxide, 3 parts; carbon black, 0.5 parts; benzotriazole ultraviolet absorbers, 0.3 parts; hindered amines Light stabilizer, 0.3 parts, each component is added to the mixture obtained in step (a), stirred evenly and set aside;

[0037](c) Heat the stirred mixture obtained in step (b) to 105°C, evacuate to -0.1MPa, stir at high speed for 50min at a revolution speed of 35rpm, and a dispersion speed of 3200rpm, cool down to 40°C, and add 0.7 parts by weight of Vinyltriethoxysilane, after stirring at a low speed of 18min at a revolution speed of 18rpm and a dispersion speed of 750rpm, add 0.75 parts of γ-(ethylenediamino)propyltrimethoxysilane, and hydraulically discharge to ...

Embodiment 3

[0040] Preparation of elastic sealant:

[0041] (a) Weigh the mixture of STP-E10 and STP-E30 by weight, 25 parts; the mixture of STP-E15 and STP-E35, 30 parts; dioctyl terephthalate, 10 parts, put each component Mix well in a blender and set aside for later use;

[0042] (b) Weigh nano-calcium carbonate, 55 parts by weight; fumed silica, 5 parts; titanium dioxide, 5 parts; carbon black, 1 part; benzotriazole ultraviolet absorbers, 0.5 parts; hindered amines Light stabilizer, 0.5 parts, each component is added to the mixture obtained in step (a), stirred evenly and set aside;

[0043] (c) Heat the stirred mixture obtained in step (b) to 110°C, evacuate to -0.1MPa, stir at a high speed of 40min at a revolution speed of 40rpm, and a dispersion speed of 4000rpm, cool down to 50°C, and add 1 part by weight of Vinyl triethoxysilane, after stirring at a low speed of 15min at a revolution speed of 20rpm and a dispersion speed of 1000rpm, add 1 part of γ-(ethylenediamino)propyltrimet...

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Abstract

The invention discloses an elastic waterproof sealant comprising 15-25 parts of alpha-dimethoxysilane-terminated polyether resin, 20-30 parts of gamma-trimethoxysilane-terminated polyether resin, 5-10 parts of dioctyl terephthalate, 40-55 parts of nano-calcium carbonate, 0.1-5 parts of fumed silica, 0.5-5 parts of titanium dioxide, 0.1-1 part of carbon black, 0.1-0.5 parts of an ultraviolet absorber, 0.1-0.5 parts of a light stabilizer, 0.5-1 parts of a dehydrating agent, 0.5-1 parts of an adhesion promoter. The invention also discloses a preparation method of the elastic waterproof sealant, and a roof waterproof structure formed by the elastic waterproof sealant. The elastic waterproof sealant has the advantages that: the elastic waterproof sealant is harmless to human; a roof waterproof structure formed by the elastic waterproof sealant can form a completely closed waterproof layer; construction is simple, and waterproof effect is excellent.

Description

technical field [0001] The invention relates to an elastic waterproof sealant, a preparation method thereof and a roof waterproof structure formed thereof, belonging to the technical field of building waterproofing. Background technique [0002] The existing vertical roof waterproof system is mainly composed of an insulation layer and a waterproof layer arranged on the insulation layer. During use, it is found that once the waterproof layer leaks, the insulation layer will become soaked and fail. At present, the commonly used roof waterproofing is mainly completed in three ways: rigid waterproofing, waterproofing membranes and waterproofing coatings. Usually, a single method is adopted for waterproofing, because rigid waterproofing is easily affected by temperature difference stress to produce a large number of fine cracks; waterproof membranes have disadvantages such as easy leakage at lap joints and complicated construction; waterproof coatings have relatively poor durabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J171/00C09J11/04C09J11/06E04D11/02E04D13/16
Inventor 李萍倪雅严生贵崔坤王涛王金明周忠振殷俊
Owner JIANGSU CUMT DAZHENG SURFACE ENG TECH
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