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Environment-friendly organosilicone-modified polyether sealant and preparation method thereof

A silicone, environmentally friendly technology, applied in the field of sealants, to improve the bonding strength, the preparation method is simple and easy to operate, and the sealing effect is good.

Active Publication Date: 2017-06-13
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method directly uses the existing prepolymer plus additives to be used together, and the performance improvement is limited by curing into a gel.

Method used

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  • Environment-friendly organosilicone-modified polyether sealant and preparation method thereof
  • Environment-friendly organosilicone-modified polyether sealant and preparation method thereof
  • Environment-friendly organosilicone-modified polyether sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The environment-friendly silicone modified polyether sealant is made of the following raw materials in parts by weight:

[0030]

[0031] The number average molecular weight of the polyoxypropylene glycol is 10000.

[0032] The number average molecular weight of the allyl polyoxyethylene ether is 700.

[0033] The preparation method is as follows:

[0034] (1) First, add polyoxypropylene glycol and diphenylmethane diisocyanate into a reaction kettle equipped with a stirring device, a nitrogen inlet, and a thermometer, raise the temperature to 85°C, and stop the reaction until the NCO mass fraction drops to 0.83%. Reaction, get product one;

[0035] (2) Allyl polyoxyethylene ether was added to product 1, and reacted at 85°C until the mass fraction of NCO was reduced to 0 to obtain product 2;

[0036] (3) Add chloroplatinic acid and trimethoxysilane to the product 2, and heat it at 85°C for 5 hours to obtain a silicone-modified polyether sealant prepolymer, and then...

Embodiment 2

[0038] The environment-friendly silicone modified polyether sealant is made of the following raw materials in parts by weight:

[0039]

[0040] The number average molecular weight of the polyoxypropylene glycol is 8000.

[0041] The number average molecular weight of the allyl polyoxyethylene ether is 500.

[0042] The preparation method is as follows:

[0043] (1) At first, polyoxypropylene glycol and toluene diisocyanate are added in the reactor that stirring device, nitrogen inlet, thermometer are housed, be warmed up to 80 ℃, when reacting to NCO mass fraction and drop to 1.05%, stop reaction, obtain product one;

[0044] (2) Allyl polyoxyethylene ether was added to product 1, and reacted at 80°C until the mass fraction of NCO was reduced to 0 to obtain product 2;

[0045] (3) Add chloroplatinic acid and trimethoxysilane to the product 2, and keep warm at 80°C for 5 hours to obtain a silicone-modified polyether sealant prepolymer, and then add dibutyltin dilaurate t...

Embodiment 3

[0047] The environment-friendly silicone modified polyether sealant is made of the following raw materials in parts by weight:

[0048]

[0049] The number average molecular weight of the polyoxypropylene glycol is 10000.

[0050] The number average molecular weight of the allyl polyoxyethylene ether is 500.

[0051] The preparation method is as follows:

[0052] (1) First, add polyoxypropylene glycol and diphenylmethane diisocyanate into a reaction kettle equipped with a stirring device, nitrogen inlet, and thermometer, raise the temperature to 90°C, and stop the reaction until the NCO mass fraction drops to 0.83%. Reaction, get product one;

[0053] (2) Allyl polyoxyethylene ether was added to product 1, and reacted at 90°C until the mass fraction of NCO was reduced to 0 to obtain product 2;

[0054] (3) Add chloroplatinic acid and triethoxysilane to the product 2, and keep warm at 90°C for 5 hours to obtain a silicone-modified polyether sealant prepolymer, and then ad...

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Abstract

The invention relates to a sealant and particularly relates to an environment-friendly organosilicone-modified polyether sealant and a preparation method thereof. The sealant is prepared from the following raw materials: difunctional polyether polyol, allyl polyether, polyisocyanate, a catalyst and organosiloxane. The preparation method of the sealant comprises the following steps: (1) firstly adding the difunctional polyether polyol and the polyisocyanate into a reactor, increasing the temperature to 80-90 DEG C, reacting and enabling mass fraction of NCO to reach 0.8-1.05%; (2) adding the allyl polyether, keeping the temperature and reacting and enabling the mass fraction of NCO to be 0; and (3) adding part of the catalyst and part of the organosiloxane, keeping the temperature and reacting to obtain an organosilicone-modified polyether sealant prepolymer, and then adding the rest of the catalyst to prepare the environment-friendly organosilicone-modified polyether sealant. The preparation method is simple and is easy to operate; the prepared sealant is high in bonding strength, excellent in sealing effect, excellent in ageing resistance, adjustable in curing speed and free of VOC (volatile organic compound), and is environmentally friendly and odorless.

Description

technical field [0001] The invention relates to a sealant, in particular to an environment-friendly silicone modified polyether sealant and a preparation method thereof. Background technique [0002] With the improvement of people's safety requirements and life taste, whether it is green or not has attracted more and more attention. However, traditional elastic sealants, such as polysulfide rubber, polyurethane sealant and organic silicone rubber, have their own defects. Polysulfide rubber has poor durability and resistance to deformation and displacement; polyurethane glue will have NCO residues during construction, which will cause environmental pollution. Pollution; silicone rubber has disadvantages such as poor mechanical properties and surface finish. Therefore, there is an urgent need to provide a sealant that satisfies the requirements of bonding strength and sealing performance, is environmentally friendly, does not contain VOC, is odorless, and has excellent workab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J171/02C09J175/08C08G18/48C08G65/336C09K3/10
CPCC08G18/48C08G65/336C09J171/02C09J175/08C09K3/10
Inventor 徐军杨凯孙兆任张士虎周玉波王玉
Owner SHANDONG INOV NEW MATERIALS CO LTD
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