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Two-component polyurethane adhesive and preparation method thereof

A two-component polyurethane and prepolymer technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, non-polymer adhesive additives, etc., can solve the problem of high mechanical strength and bonding strength, medium corrosion resistance, mechanical Performance, wear resistance, poor solvent resistance, insufficient flexibility, etc., to achieve the effect of good adhesion, high weather resistance, and excellent adhesion performance

Inactive Publication Date: 2021-11-19
上海自图新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic silica gel has good high and low temperature resistance, weather resistance and cohesiveness, but its mechanical properties, wear resistance and solvent resistance are poor; epoxy adhesive has high mechanical strength and bonding strength, and good medium corrosion resistance. Insufficient flexibility and poor impact resistance, it is difficult to make a material that cures at room temperature and has excellent elasticity

Method used

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  • Two-component polyurethane adhesive and preparation method thereof
  • Two-component polyurethane adhesive and preparation method thereof
  • Two-component polyurethane adhesive and preparation method thereof

Examples

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preparation example Construction

[0052] A kind of preparation method of above-mentioned two-component polyurethane glue, comprises the following steps according to above-mentioned formula ratio:

[0053] S1: preparing TPU prepolymer;

[0054] Prepare the TPU prepolymer according to the conventional method, for example: add polyisocyanate, polyether polyol or polyester polyol, and 1,4-butanediol to the reactor according to the formula, and heat to 80-100 °C while stirring. ℃, and filled with protective gas to continue heating and stirring reaction for 60-120 minutes, after adding catalyst, continue to react under heating and stirring for 30-60 minutes.

[0055] S2: Under inert gas protection and heating conditions, add epoxy-modified polysiloxane to the TPU prepolymer prepared in step S1, stir and mix until the detected NCO reaches the theoretical value, and obtain epoxy-modified polysiloxane For silicone-terminated TPU, NCO is an isocyanate group, which is an important indicator to measure the quality of pol...

Embodiment 1-2

[0071] Embodiment 1-2 preparation method is as follows:

[0072] S1: Preparation of aromatic polyether polyurethane prepolymer:

[0073] Polyisocyanate (MDI), polyether polyol (PTMEG650), and 1,4-butanediol were weighed according to the formula and added to the reactor respectively, heated to 95°C while stirring, and filled with nitrogen to continue heating and stirring for 120 minutes. After adding the catalyst, continue to react under heating and stirring for 60min.

[0074] S2: Preparation of epoxy polysiloxane-terminated polyurethane prepolymer:

[0075] Under nitrogen protection and heating at 85°C, add epoxy-modified polysiloxane to the aromatic polyether polyurethane prepolymer prepared in step (1) while stirring and mixing, and continue stirring until detection NCO reaches the theoretical value, thereby preparing epoxy-siloxane-terminated TPU;

[0076] S3: Under vacuum conditions, under the condition of stirring and mixing, according to the formula, the epoxy-siloxa...

Embodiment 3-4

[0098] Embodiment 3-4 preparation method:

[0099] S1: Preparation of aromatic polyester polyurethane prepolymer

[0100] Polyisocyanate (MDI), polyester polyol (PCL1000), and 1,4-butanediol were weighed according to the formula and added to the reactor respectively, heated to 95°C while stirring, and filled with nitrogen to continue heating and stirring for 120 minutes. After adding the catalyst, continue to react under heating and stirring for 60min.

[0101] S2: Preparation of epoxy polysiloxane-terminated polyurethane prepolymer: under the condition of nitrogen protection and heating at 85 ° C, the aromatic polyether polyurethane prepolymer prepared in step (1) is prepared under the condition of stirring and mixing Add epoxy-modified polysiloxane to the body, and continue to stir until the detected NCO reaches the theoretical value, thereby preparing epoxy-siloxane-terminated TPU;

[0102] S3: Under vacuum conditions, under the condition of stirring and mixing, according...

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Abstract

The invention discloses a two-component polyurethane adhesive and a preparation method thereof. The polyurethane adhesive comprises a component A and a component B according to a mass ratio of the component A to the component B of 1:1, wherein the component A comprises the following components by mass: 35-45 of TPU prepolymer; 5-10 parts of epoxy group modified polysiloxane,; and 1-2 parts of nano carbon black, and the component B is prepared from the following components in parts by mass: 40-50 parts of TPU prepolymer, 1-2 parts of nano carbon black, and 2-4 parts of an initiator. The preparation method comprises the following steps: under inert gas protection and heating conditions, adding epoxy group modified polysiloxane into a TPU prepolymer, stirring and mixing to obtain epoxy group silica-terminated TPU; continuously stirring the obtained epoxy group silica-terminated TPU and nano carbon black, and removing bubbles in vacuum to obtain a component A; and finally, continuously stirring and mixing the TPU prepolymer obtained in the step S1 with nano carbon black and an initiator, and removing bubbles in vacuum to obtain a component B so as to obtain the polyurethane adhesive with excellent wear resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to a two-component polyurethane adhesive and a preparation method thereof. Background technique [0002] The repair glue is an important combination part of the blade protection material. It can quickly fill and repair the blade protection tape on site when it is damaged by impact, and quickly have a protective effect, so as to avoid delaying the service of aircraft, helicopters, fighter jets or wind turbine blades due to the replacement of all protection tapes. and the use of cars. [0003] According to the research of literature and foreign products, under the current technical level, the products that can be used as repair materials mainly include organic silica gel, epoxy glue, polyurethane glue, etc. Organic silica gel has good high and low temperature resistance, weather resistance and cohesiveness, but its mechanical properties, wear resistance and solvent resistance are p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J183/06C09J11/04
CPCC09J175/04C09J11/04C08K2201/011C08L83/06C08K3/04
Inventor 于锦李永泰李亚兵张欣戎
Owner 上海自图新材料科技有限公司
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