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Low-viscosity silane modified polyether resin and preparation method thereof

A silane-modified polyether, low-viscosity technology, applied in the direction of polyether adhesives, adhesives, adhesive types, etc., can solve the problems of high resin viscosity, toxicity, and low modulus, and achieve simple steps, Easy to operate, good elastic effect

Pending Publication Date: 2022-02-08
三棵树(上海)新材料研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the high viscosity of the resin (viscosity is about 30000-80000cp) due to the chain extension reaction of diisocyanate and short-chain polypropylene glycol in the preparation of silane-modified polyether resin by the polyurethane prepolymer method, this Resin preparation is not easy to achieve low modulus and has the disadvantages of toxicity. The present invention provides a low-viscosity silane-modified polyether resin (viscosity lower than 30000cp) and its preparation method, which introduces N'N-carbonyldiimidazole (CDI) Carry out the chain extension reaction of polyether without using toxic isocyanate silane coupling agent, and has the advantages of low viscosity, low modulus and non-toxicity

Method used

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  • Low-viscosity silane modified polyether resin and preparation method thereof
  • Low-viscosity silane modified polyether resin and preparation method thereof
  • Low-viscosity silane modified polyether resin and preparation method thereof

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Embodiment 1

[0055] A low-viscosity silane-modified polyether resin according to the present invention is mainly prepared from the following components according to the following ratios by weight and number:

[0056]

[0057]

[0058] The molecular weight of the polyether polyol is 8000 g / mol.

[0059] The base catalyst is KOH.

[0060] The weight ratio of N'N-carbonyldiimidazole to polyether polyol is 1.2:1.

[0061] The polyether polyol is polypropylene glycol; the aminosilane coupling agent is 3-aminopropyltrimethoxysilane.

[0062] The preparation method of described low-viscosity silane-modified polyether resin mainly comprises the following steps carried out in sequence:

[0063] (1) Take polyether polyol and remove water under vacuum for 2 hours at 110°C, then cool down to 70°C;

[0064] (2) Mix N'N-carbonyldiimidazole and alkali catalyst with the polyether polyol obtained in step (1), then pass through nitrogen protection, and heat up to 90°C for 2 hours to obtain reactant...

Embodiment 2

[0074] A low-viscosity silane-modified polyether resin according to the present invention is mainly prepared from the following components according to the following ratios by weight and number:

[0075]

[0076] The molecular weight of the polyether polyol is 4000 g / mol.

[0077] The base catalyst is triethylamine.

[0078] The polyether polyol is polypropylene glycol; the aminosilane coupling agent is any combination of 3-aminopropylmethyldimethoxysilane and 3-aminopropylmethyldiethoxysilane.

[0079] The preparation method of described low-viscosity silane-modified polyether resin mainly comprises the following steps carried out in sequence:

[0080] (1) Take polyether polyol and remove water under vacuum for 2.5 hours at 100°C, then cool down to 65°C;

[0081] (2) Mix N'N-carbonyldiimidazole and alkali catalyst with the polyether polyol obtained in step (1), then pass through nitrogen protection, and raise the temperature to 85° C. for 3 hours to obtain reactant A;

...

Embodiment 3

[0092] A low-viscosity silane-modified polyether resin according to the present invention is mainly prepared from the following components according to the following ratios by weight and number:

[0093]

[0094] The molecular weight of the polyether polyol is 6000 g / mol.

[0095] The base catalyst is triethylamine.

[0096] The polyether polyol is polypropylene glycol; the aminosilane coupling agent is 3-aminopropyltriethoxysilane, N-2-aminoethyl-3-aminopropylmethyldiethoxysilane and Any combination of N-2-aminoethyl-3-aminopropylmethyldimethoxysilane.

[0097] The preparation method of described low-viscosity silane-modified polyether resin mainly comprises the following steps carried out in sequence:

[0098] (1) Take polyether polyol and remove water under vacuum for 3 hours at 120°C, then cool down to 75°C;

[0099] (2) Mix N'N-carbonyldiimidazole and alkali catalyst with the polyether polyol obtained in step (1), then pass through nitrogen protection, and heat up t...

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Abstract

The invention relates to low-viscosity silane modified polyether resin and a preparation method thereof. The low-viscosity silane modified polyether resin is mainly prepared from the following components in parts by weight: polyether polyol with the molecular weight of 4000-8000 g / mol. According to the invention, the defects that the viscosity of the resin is high due to the fact that a chain extension reaction is carried out by using diisocyanate and short-chain polypropylene glycol in an existing method for preparing the low-viscosity silane modified polyether resin by using a polyurethane prepolymer method, and MS glue prepared from the resin is high in modulus and has toxicity are overcome. N',N-carbonyldiimidazole (CDI) is introduced to carry out a chain extension reaction of polyether, and a toxic isocyanate silane coupling agent does not need to be used, so that the polyether has the advantages of low viscosity, low modulus and no toxicity.

Description

technical field [0001] The invention relates to a low-viscosity silane-modified polyether resin and a preparation method thereof, which are applied in the field of sealant production. Background technique [0002] The early three types of high-grade elastic sealants (polysulfide, polyurethane and silicone sealants) played an important role in promoting the development of various fields, but because of their own weaknesses, they accelerated the development of new elastic sealants. research and development. [0003] Silane-modified polyether is referred to as MS-Polymer. It was first successfully developed by Japan Zhongyuan Chemical Co., Ltd. in the 1980s and was quickly promoted in the Japanese market. Silane-modified polyether polymer is composed of polyoxypropylene segment of the main chain and siloxane at the end group. The main chain structure of the polyether provides good flexibility and ductility, and the silane oxygen at the end group can be used in moisture and Un...

Claims

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Application Information

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IPC IPC(8): C08G65/336C08G65/333C09J171/00
CPCC08G65/336C08G65/33396C09J171/00C08G2170/00
Inventor 任杰朱军詹才辉
Owner 三棵树(上海)新材料研究有限公司
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