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Silane-terminated MS resin and preparation method thereof

A silane-terminated and resin technology, applied in adhesives and other directions, can solve the problems of difficult compounding, high cohesive strength, slow curing speed, etc., and achieve excellent operability and practicability, excellent weather resistance and durability, The effect of reducing filler moisture requirements

Inactive Publication Date: 2018-07-27
JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the activity of ethoxy group is low, the prepared MS resin has high storage stability, and the requirement for filler moisture in the compounding process is low, but its curing speed is slow during use, which affects the actual use
The activity of methoxy group is high, and the MS resin capped with methoxy group is easy to gel when exposed to the air, and the moisture content in the filler needs to be strictly controlled, so it is difficult to compound the glue
Low-molecular-weight silane-terminated MS resin has low viscosity and is easy to compound, but has low cohesive strength; high-molecular-weight MS resin has high viscosity and high cohesive strength, but it is difficult to compound and store.

Method used

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  • Silane-terminated MS resin and preparation method thereof
  • Silane-terminated MS resin and preparation method thereof
  • Silane-terminated MS resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The first step: put 100kg of hydroxyl-terminated polyether after pre-water removal treatment into the reaction kettle, add 0.002kg of hydrogen-containing double head and 2*10 -6 kg of platinum catalyst, heated up to 30°C for 6 hours under the protection of nitrogen to obtain prepolymer 1. The second step: continue to add 0.008 kg of vinyltrimethoxysilane into the reaction kettle, and continue to react for 6 hours under the condition of maintaining the temperature at 90° C. to obtain the MS resin of the present invention. The infrared spectrum of the MS resin is as figure 1 shown.

Embodiment 2

[0024] Step 1: Put 100kg of hydroxyl-terminated polyether after pre-dewatering treatment in the reactor, add 0.02kg of hydrogen-containing silicone oil with a hydrogen content of 0.5% (Foshan Huagu Silicone Co., Ltd.) and 2*10- 6kg of platinum catalyst was heated to 90°C for 4 hours under nitrogen protection to obtain prepolymer 1. The second step: continue to add 0.008 kg of γ-methacryloxypropyl trimethoxysilane into the reaction kettle, and continue to react for 6 hours under the condition of maintaining the temperature at 90° C. to obtain the MS resin of the present invention. The infrared spectrum of the MS resin is as figure 2 shown.

Embodiment 3

[0026] The first step: put 100kg of hydroxyl-terminated polyether after pre-water removal treatment into the reaction kettle, add 0.2kg of hydrogen-containing silicone oil with a hydrogen content of 0.5% (Foshan Huagu Silicone Co., Ltd.), under nitrogen protection The temperature was raised to 100°C for 6 hours to obtain prepolymer 1. The second step: continue to add 0.02kg γ-methacryloxypropyl trimethoxysilane and 0.03kg γ-methacryloxypropylmethyldimethoxysilane to the reactor, and keep the temperature at 110°C After continuing to react for 4h under the condition, the MS resin of the present invention was obtained. The infrared spectrum of the MS resin is as image 3 shown.

[0027] The MS resins prepared in Examples 1-3 have the performance parameters shown in Table 1 below.

[0028] Table 1

[0029] Example

Molecular weight Mn

Molecular weight distribution PDI

Viscosity cp

Exposure to air for 10 days

1

14800

1.31

10000～15000

n...

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Abstract

The invention discloses a silane-terminated MS resin and a preparation method thereof. The silane-terminated MS resin is characterized in that the silane-terminated MS resin is ethyoxyl- or methoxyl-terminated; the preparation method comprises the following steps of (1) adding 100 weight parts of hydroxyl terminated polyether, which is subjected to pre-dehydration treatment, into a reaction still,adding hydrogen-containing double-terminating head or terminal hydrogen-containing silicone oil, further adding a platinum catalyst, raising the temperature to 30 to 100 DEG C under the protection ofnitrogen, reacting for 6 to 10h to obtain a prepolymer I; (2) continuously adding 0.005 to 0.1 weight part of vinyl silane terminating agent, maintaining the temperature to be 90 to 110 DEG C and continuously reacting for 4 to 6h to obtain the MS resin. According to the preparation method, provided by the invention, no organotin catalyst is used in a synthesizing process, MS resins with differentmolecular weights, different viscosities and terminated by different silanes can be synthesized by the method, and the MS resin prepared by the method is good in curing speed and difficult to coagulate.

Description

technical field [0001] The invention relates to the field of MS resins, in particular to a silane-terminated MS resin and a preparation method thereof. Background technique [0002] Silane-terminated polyether resin (abbreviated as MS resin) is a polymer with polyether as the main chain and terminated with siloxane at both ends. The MS sealant prepared by using MS resin as the base glue with other fillers, water removers and catalysts has excellent weather resistance, good adhesion, paintability, low staining, and is environmentally friendly. It is widely used in the construction industry and gradually replaces silicone sealants and polyurethane sealants. In other industrial fields such as automobile manufacturing, rail transit, container manufacturing, equipment manufacturing, electronic and electrical fields, etc., it is also being promoted and applied more and more. [0003] MS resin is catalyzed by catalysts (amines, organic tins) in a humid environment, and the termin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/46C09J183/12
CPCC08G77/46C09J183/12
Inventor 王宇郑晓强白永平李卫东殷晓芬
Owner JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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