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High-weather-resistance high-performance modified polyether resin for building exterior wall and sealant

A technology for building exterior walls and polyether resins, applied in the field of silane-modified polyethers, can solve the problems of insufficient weather resistance, inability to meet long-term effective exterior wall waterproofing, etc., and achieves improved heat resistance, high elongation, and improved tensile strength. The effect of tensile strength

Active Publication Date: 2021-10-22
深圳市百丽春粘胶实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing technology and conventional one-component silane-modified polyether sealants on the market have insufficient weather resistance and cannot meet the needs of long-term effective exterior wall waterproofing

Method used

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  • High-weather-resistance high-performance modified polyether resin for building exterior wall and sealant
  • High-weather-resistance high-performance modified polyether resin for building exterior wall and sealant
  • High-weather-resistance high-performance modified polyether resin for building exterior wall and sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A modified polyether resin for building exterior walls with high weather resistance and high performance, prepared by the following preparation method, the preparation steps of the preparation method comprising:

[0047] S1: Put 1000g of polyether polyol PREMINOL S 4318F into the reactor, raise the temperature to 110°C, stir, vacuum dehydrate and degas for 3 hours, cool down to 85°C, then add tetramethylxylylene diisocyanate (TMXDI), Next, add 2g of bismuth carboxylate, stir and mix for 30 minutes at a reaction temperature of 85°C, then raise the temperature to 112°C, and react for 4 hours to obtain a polyurethane prepolymer; among them, polyether polyol PREMINOL S 4318F and tetramethyl The mol ratio of xylylene diisocyanate is 1:2.05;

[0048] S2: Add the alkoxylated o-cyclohexanediol to the polyurethane prepolymer obtained above under stirring, and stir and mix the reaction for 4 hours at 115°C to obtain the chain-extended polyurethane prepolymer; wherein, the alkoxyl...

Embodiment 2

[0051] A modified polyether resin for building exterior walls with high weather resistance and high performance, prepared by the following preparation method, the preparation steps of the preparation method comprising:

[0052] S1: Put 1000g of polyether polyol PREMINOL S 4318F into the reactor, raise the temperature to 110°C, stir, vacuum dehydrate and degas for 3 hours, cool down to 85°C, then add tetramethylxylylene diisocyanate (TMXDI), At a reaction temperature of 85°C, stir and mix for 30 minutes, then add 3g of bismuth carboxylate, raise the temperature to 112°C, and react for 4 hours to obtain a polyurethane prepolymer; among them, polyether polyol PREMINOL S 4318F and tetramethylbenzene The molar ratio of dimethyl diisocyanate is 1:2.1;

[0053] S2: Add the alkoxylated o-cyclohexanediol to the polyurethane prepolymer obtained above under stirring, and stir and mix it at 110°C for 4 hours to obtain the chain-extended polyurethane prepolymer; The molar ratio of oxidize...

Embodiment 3

[0056] A modified polyether resin for building exterior walls with high weather resistance and high performance, prepared by the following preparation method, the preparation steps of the preparation method comprising:

[0057] S1: Put 1000g of polyether polyol PREMINOL S 4318F into the reaction kettle, raise the temperature to 110°C, stir, vacuum dehydrate and degas for 3 hours, cool down to 85°C, then add isophorone diisocyanate (IPDI), and then add 3g Dibutyltin dilaurate, stirred and mixed for 30 minutes at a reaction temperature of 85°C, then raised the temperature to 112°C, and reacted for 4 hours to obtain a polyurethane prepolymer; among them, polyether polyol PREMINOL S 4318F and tetramethyl The mol ratio of phenyl dimethyl diisocyanate is 1:2.2;

[0058] S2: When the polyurethane prepolymer obtained above is stirred, the alkoxylated o-cyclohexanediol is added, and the alkoxylated o-cyclohexanediol is stirred and mixed for 4 hours at 110°C to obtain the chain-extended...

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Abstract

The invention discloses a high-weather-resistant high-performance modified polyether resin for building an exterior wall. The modified polyether resin is prepared by the following preparation method: uniformly mixing polyether polyol and organic polyisocyanate under the condition of completely no water vapor, and reacting under the action of a catalyst to obtain a polyurethane prepolymer; in an inert atmosphere, adding a polyol chain extender into the polyurethane prepolymer, and carrying out a reaction to obtain a chain-extended polyurethane prepolymer; and adding an isocyanate silane end-capping reagent into the chain-extended polyurethane prepolymer for reaction, and obtaining the polyurethane adhesive after the reaction is finished. According to the modified polyether resin disclosed by the invention, the preparation method is improved, the advantages of various materials are utilized, organic combination is performed, and proper reaction conditions are matched, so that the tensile strength, the elongation at break, the cohesiveness after water ultraviolet aging and other properties of the material are improved, and the modified polyether resin can meet the long-term effective waterproof requirement of the exterior wall.

Description

technical field [0001] The invention relates to the technical field of silane-modified polyether, in particular to a modified polyether resin for building exterior walls with high weather resistance and high performance, and in particular to a sealant containing the above-mentioned modified polyether resin. Background technique [0002] Sealant is an indispensable material in the fields of construction, transportation and equipment assembly. High-performance sealant has attracted more and more attention. Although the amount and cost of sealant account for a small proportion of the total application field, it often affects product performance. play a decisive role. [0003] Silane-modified polyether sealant (referred to as MS sealant) combines the advantages of polyurethane sealant and silicone sealant, overcomes the performance deficiencies of both, and has excellent mechanical strength, paintability, and stain resistance. Isocyanates and organic solvents are the main devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/71C08G18/66C08G18/48C08G18/32C08G18/10C09J175/08
CPCC08G18/6674C08G18/48C08G18/10C08G18/718C09J175/08C08G18/3212C08L75/08
Inventor 潘自鼎商大明
Owner 深圳市百丽春粘胶实业有限公司
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