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A kind of high-strength equal proportion silane modified polyether sealant and preparation method thereof

A silane-modified polyether, equal-proportion technology, used in polyether adhesives, adhesives, polymer adhesive additives, etc., can solve the problem of slow deep curing, low mechanical performance requirements, and unsuitable for deep and wide joints. Waterproof sealing and other problems, to achieve the effect of good environmental protection performance and good mechanical performance

Active Publication Date: 2022-02-22
CHENGDU GUIBAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN106987223A discloses "high-strength polyether modified structural sealant and its preparation method". The patented sealing material is a single-component product. The curing is significantly affected by the external environment. The deep curing is slow and the curing depth is limited. It is not suitable for deep and wide Waterproof sealing of joints; patent CN108893061A discloses "a weather-resistant two-component silane-modified polyether sealant and its preparation method". The patent A and B components are mixed at a ratio of 10:1. The mixing equipment requires high measurement accuracy, and when the mixing ratio fluctuates, it is easy to cause the performance of the sealant to be unstable, or even uncured, which has great limitations in application; patent CN109666435A discloses "a double Component anti-mildew silane modified polyether adhesive and its preparation method", the mixing mass ratio range is (8-12):10, this patented sealant is mainly used in the field of home decoration, and does not require high mechanical properties. Restricted field of use

Method used

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  • A kind of high-strength equal proportion silane modified polyether sealant and preparation method thereof
  • A kind of high-strength equal proportion silane modified polyether sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Preparation of component A: 100 parts of dimethoxysilane modified polyether resin with a viscosity of 20000mPa.s, 5 parts of polypropylene glycol PPG2000, 40 parts of nano-calcium carbonate, 20 parts of ground calcium carbonate, and 40 parts of kaolin , 20 parts with a specific surface area of ​​200m 2 / g of fumed silica is added to a high-speed disperser, the material is heated to 110°C, and stirred for 2.5 hours under a vacuum of 0.085MPa to obtain a mixed material; when the temperature of the mixed material is lowered to below 45°C, add 4 parts of vinyl trimethyl Oxysilane, 1 part of salicylate UV absorber, 1 part of hindered amine light stabilizer, 4 parts of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, 2 parts of chelating The tin was stirred for 40min under a vacuum of 0.085MPa, and the material was packaged to obtain the A component product;

[0047] (2) Preparation of component B: 100 parts of polypropylene glycol PPG1000, 70 parts of nanometer calcium c...

Embodiment 2

[0050] (1) Preparation of component A: 100 parts of dimethoxysilane modified polyether resin with a viscosity of 10000mPa.s, 5 parts of polypropylene glycol PPG3000, 30 parts of nano calcium carbonate, 55 parts of ground calcium carbonate, 25 parts of ratio Surface area is 150m 2 / g of fumed silica is added to a high-speed disperser, the material is heated to 110°C, and stirred for 3 hours under a vacuum of 0.085MPa to obtain a mixed material; when the temperature of the mixed material is lowered to below 45°C, add 4 parts of vinyl trimethoxy base silane, 1 part of benzotriazole UV absorber, 1 part of hindered amine light stabilizer, 6 parts of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, 1.5 parts of chelated tin Stir for 40min under a vacuum of 0.085MPa, discharge and pack to obtain the product of component A;

[0051] (2) Preparation of component B: 100 parts of polypropylene glycol PPG1000, 65 parts of nano-calcium carbonate, 20 parts of heavy calcium carbonate, 20 par...

Embodiment 3

[0054] (1) Preparation of component A: 100 parts of trimethoxysilane modified polyether resin with a viscosity of 20000mPa.s, 10 parts of diisodecyl phthalate, 25 parts of nano calcium carbonate, and 75 parts of heavy calcium carbonate , 20 parts with a specific surface area of ​​200m 2 / g of fumed silica is added to a high-speed disperser, the material is heated to 120°C, and stirred for 2.5 hours under a vacuum of 0.08MPa to obtain a mixed material; when the temperature of the mixed material is lowered to below 45°C, add 5 parts of vinyl trimethyl Oxysilane, 1 part of salicylate UV absorber, 1 part of hindered amine light stabilizer, 4 parts of γ-aminopropyl trimethoxysilane, 2 parts of γ-(2,3-epoxypropoxy)propane Trimethoxysilane and 2 parts of dibutyltin dilaurate were stirred for 50min under a vacuum of 0.08MPa, and were discharged and packaged to obtain the product of component A;

[0055] (2) Preparation of component B: 100 parts of polypropylene glycol PPG2000, 70 par...

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Abstract

The invention discloses a high-strength equal-proportion silane-modified polyether sealant and a preparation method thereof. The sealant is prepared by mixing components A and B in equal proportions; component A: 100 parts of silane-modified polyether resin; 0-20 parts of plasticizer; 70-100 parts of filler; 10-30 parts of fumed silica; 1-2 parts of ultraviolet absorber; 1-2 parts of light stabilizer; 2-6 parts of water remover; bonding 2-6 parts of accelerator; 0-1 part of co-catalyst; 1-2 parts of catalyst; B component: 70-120 parts of plasticizer; 90-120 parts of filler; 0-10 parts of fumed silica; 0 parts of pigment ‑15 parts; 1‑4 parts of water; 0‑1.5 parts of promoter. The silane-modified polyether sealant of the present invention has a tensile strength of >4MPa, an elongation of >400%, good environmental performance, and equal proportion mixing improves the phenomenon of unstable or even uncured sealant properties caused by large mixing ratios.

Description

technical field [0001] The invention relates to a sealant and a preparation method thereof, in particular to a high-strength equal-proportion silane-modified polyether sealant and a preparation method thereof, belonging to the field of adhesives. Background technique [0002] At present, the demand for adhesives in the fields of industry and construction is increasing day by day, among which high-performance structural sealants include silicone and polyurethane sealants. Among them, polyurethane sealant has the advantages of high strength, tear resistance, and medium corrosion resistance, but also has disadvantages such as complex production process, easy foaming and yellowing of products, and toxic NCO groups; silicone sealant has heat and humidity resistance, aging resistance, etc. , good storage stability, etc., but also has the disadvantages of poor decoration, and the oily dialysis of the adhesive layer is easy to pollute the substrate. The silane-modified polyether se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J171/00C09J11/04C09J11/06C09J11/08
CPCC09J171/00C09J11/04C09J11/06C09J11/08C08K2201/006C08K2201/014C08K2003/265
Inventor 王有治罗芳严聪罗伟黄强张明
Owner CHENGDU GUIBAO SCI & TECH