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Low-modulus single-component silane modified polyether sealing gum and preparation method thereof

A technology of silane-modified polyether and silane polyether, which is applied in the direction of polyether adhesives, chemical instruments and methods, adhesives, etc., can solve problems such as difficult control of silane end-capping rate, and no manufacturer has yet produced sealants. Achieve the effects of easy control of product quality, good storage stability, and excellent cohesiveness

Inactive Publication Date: 2013-03-27
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are two types of low modulus one-component polyurethane sealant on the market: NCO-terminated and silane-terminated. The sealant prepared by NCO-terminated requires a primer during use, while the sealant prepared by silane-terminated It is difficult to control the silane end-capping rate in the preparation of silane-terminated prepolymers, and no manufacturer has yet produced this type of sealant
Silane-modified polyether sealant is prepared from silane-modified polyether. It does not contain isocyanate, is ecological and environmentally friendly, does not require primer, is easy to control in production, and has good storage stability. However, the main production in the building materials industry is High-modulus silane-modified polyether sealants, such as silane-terminated polyether sealants produced by Beijing Tianshan New Materials, and low-modulus silane-modified polyether sealants have not yet been produced by manufacturers

Method used

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  • Low-modulus single-component silane modified polyether sealing gum and preparation method thereof
  • Low-modulus single-component silane modified polyether sealing gum and preparation method thereof
  • Low-modulus single-component silane modified polyether sealing gum and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] MS polymer S203H 32.7%; plasticizer (dinonyl phthalate) 14.4%; titanium dioxide 6.5%; light calcium carbonate 40.5%; polyamide wax 3.0%; 0.7% dibutyltin acid; 0.7% vinyltrimethoxysilane; 1.0% N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane.

[0027] Preparation method: Add S203H, DINP, titanium dioxide, and ultraviolet absorber in sequence to a biaxial planetary stirring tank at room temperature, mix evenly for 30 minutes, then add light calcium carbonate and polyamide wax, and heat at 105±5°C at high speed Stir and vacuum dehydrate for 2 hours, take a sample to measure the moisture, if the moisture content is below 5 / 10,000, lower the temperature, if the moisture content is above 5 / 10,000, continue vacuum dehydration until it is below 5 / 10,000. When the temperature drops below 50°C, add catalyst, water remover, and adhesion promoter, stir at high speed for 30 minutes, vacuum defoam for 10 minutes, and then fill to obtain a one-component silane-terminated polyether seala...

Embodiment 2

[0029] MS Polymer S203H 6.7%; MS Polymer S303H 15.7%; Plasticizer (Dinonyl Phthalate) 20.1%; Titanium Dioxide 4.5%; Light Calcium Carbonate 35.8%; Heavy Calcium Carbonate 12.1%; Polyamide Wax 2.9%; UV absorber Tinuvin3260.4%; Dibutyltin dilaurate 0.4%; Vinyl trimethoxysilane 0.7%; N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane 0.7% .

[0030] Preparation method: add S203H, S303H, DINP, titanium dioxide, and ultraviolet absorber in sequence to a biaxial planetary stirring tank at room temperature, mix evenly for 30 minutes, then add light calcium carbonate, heavy calcium carbonate and polyamide wax, High-speed stirring and vacuum dehydration at 105±5°C for 2 hours, sampling and measuring moisture, if the moisture content is below 5 / 10,000, lower the temperature, if the moisture content is above 5 / 10,000, continue vacuum dehydration until it is below 5 / 10,000. When the temperature drops below 50°C, add catalyst, water remover, and adhesion promoter, stir at high speed for 30 mi...

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Abstract

The invention discloses low-modulus single-component silane modified polyether sealing gum which consists of the following components: silane modified polyether, a plasticizer, pigment, fillers, a thixotropic agent, an ultraviolet light absorber, a catalyst, a dehydrating agent and an adhesion promoter. According to the silane modified polyether sealing gum disclosed by the invention, by controlling the technical parameters such as the types and contents of the fillers, the types and content of the plasticizer, and the types and content of the thixotropic agent, the prepared silane modified polyether sealing gum does not need prime coat, does not contain isocyanate, is economical and environmentally-friendly, low in modulus, can bear dynamic juncture, has good flexibility, cohesiveness and good storage stability, can be firmly adhered with concrete, PVC (Polyvinyl Chloride) materials, aluminum sheets, glass, steel products, ceramic and the like, and can be widely applied to the fields of roads, bridges and buildings.

Description

technical field [0001] The invention relates to a low-modulus one-component silane-modified polyether sealant, which is used for joint sealing of concrete and other building materials such as stone, mineral wool board, thermal insulation board, gypsum board, aluminum board and other construction fields, and belongs to construction material field. Background technique [0002] In the field of building materials, the commonly used low-modulus one-component building material is low-modulus one-component polyurethane sealant, whose physical and chemical properties are defined by ISO11600: 100% tensile modulus is less than 0.4MPa or -20 at 23°C Less than 0.6MPa at ℃ is a low modulus sealant. In terms of product design, low-modulus sealant is very different from common high-modulus one-component polyurethane sealant. It is rarely produced in China, and even in foreign countries, only a few companies can produce it. [0003] Low modulus one-component polyurethane sealants are com...

Claims

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Application Information

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IPC IPC(8): C09J171/00C09J11/06C09J11/04C09K3/10
Inventor 孙金梅王新锋
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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