阅读说明：本技术 一种环保密封胶及其制备方法 (Environment-friendly sealing adhesive and preparation method thereof ) 是由 岑学勇 曹雪花 于 2021-09-14 设计创作，主要内容包括：本发明公开了一种环保密封胶,由以下组分的原材料制备而成：生物基水性聚氨酯树脂、丁腈橡胶、聚醚多元醇、活性纳米碳酸钙、硅烷改性聚醚、硅烷偶联剂、增塑剂、填料、固化剂、催化剂和消泡剂。本发明的制备方法包括：填料增塑剂制备、主料混合制备、降温和出料包装。本发明生物基水性聚氨酯树脂本身的制备和应用过程不污染环境的特性得以发挥,有效解决了现有技术中的密封胶的制备和使用不够环保的技术问题,进而实现了降低密封胶对环境破坏的技术效果。(The invention discloses an environment-friendly sealing adhesive, which is prepared from the following raw materials: the bio-based water-based polyurethane resin comprises bio-based water-based polyurethane resin, nitrile rubber, polyether polyol, active nano calcium carbonate, silane modified polyether, a silane coupling agent, a plasticizer, a filler, a curing agent, a catalyst and a defoaming agent. The preparation method comprises the following steps: preparing a filler plasticizer, mixing and preparing main materials, cooling, discharging and packaging. The characteristic that the preparation and application processes of the bio-based waterborne polyurethane resin do not pollute the environment is exerted, the technical problem that the preparation and use of the sealant in the prior art are not environment-friendly is effectively solved, and the technical effect of reducing the damage of the sealant to the environment is further realized.)

1. An environment-friendly sealant is characterized in that: the material is prepared from the following raw materials:

the bio-based water-based polyurethane resin comprises bio-based water-based polyurethane resin, nitrile rubber, polyether polyol, active nano calcium carbonate, silane modified polyether, a silane coupling agent, a plasticizer, a filler, a curing agent, a catalyst and a defoaming agent.

2. The environment-friendly sealant according to claim 1, which is characterized in that: the material is prepared from the following raw materials in parts by weight:

60-70 parts of bio-based waterborne polyurethane resin, 90-100 parts of nitrile rubber, 10-18 parts of polyether polyol, 30-40 parts of active nano calcium carbonate, 10-20 parts of silane modified polyether, 2-6 parts of silane coupling agent, 20-30 parts of plasticizer, 35-45 parts of filler, 10-15 parts of curing agent, 1-3 parts of catalyst and 1-3 parts of defoaming agent.

3. The environment-friendly sealant according to claim 2, characterized in that: the material is prepared from the following raw materials in parts by weight:

60-65 parts of bio-based waterborne polyurethane resin, 90-95 parts of nitrile rubber, 10-14 parts of polyether polyol, 30-35 parts of active nano calcium carbonate, 10-15 parts of silane modified polyether, 2-4 parts of silane coupling agent, 20-25 parts of plasticizer, 35-40 parts of filler, 10-13 parts of curing agent, 1-2 parts of catalyst and 1-2 parts of defoaming agent.

4. The environment-friendly sealant according to claim 2, characterized in that: the material is prepared from the following raw materials in parts by weight:

65-70 parts of bio-based waterborne polyurethane resin, 95-100 parts of nitrile rubber, 14-18 parts of polyether polyol, 35-40 parts of active nano calcium carbonate, 15-20 parts of silane modified polyether, 4-6 parts of silane coupling agent, 25-30 parts of plasticizer, 40-45 parts of filler, 13-15 parts of curing agent, 2-3 parts of catalyst and 2-3 parts of defoaming agent.

5. The environment-friendly sealant according to claim 2, characterized in that: the material is prepared from the following raw materials in parts by weight:

65 parts of bio-based waterborne polyurethane resin, 95 parts of nitrile rubber, 14 parts of polyether polyol, 35 parts of active nano calcium carbonate, 15 parts of silane modified polyether, 4 parts of silane coupling agent, 25 parts of plasticizer, 40 parts of filler, 13 parts of curing agent, 2 parts of catalyst and 2 parts of defoaming agent.

6. The environment-friendly sealant according to claim 2, characterized in that: the material is prepared from the following raw materials in parts by weight:

70 parts of bio-based waterborne polyurethane resin, 90 parts of nitrile rubber, 14 parts of polyether polyol, 35 parts of active nano calcium carbonate, 15 parts of silane modified polyether, 4 parts of silane coupling agent, 25 parts of plasticizer, 40 parts of filler, 13 parts of curing agent, 2 parts of catalyst and 2 parts of defoaming agent.

7. The process for preparing an environmentally friendly sealant according to any one of claims 1 to 6, wherein: the method comprises the following steps:

(S1) filler plasticizer preparation: firstly, drying the filler and the plasticizer at 120 ℃ until the moisture content is detected to be less than or equal to 0.1 percent for standby;

(S2) mixing and preparing main materials: adding bio-based waterborne polyurethane resin, nitrile rubber, polyether polyol and a plasticizer into a reaction kettle, heating, starting stirring, adding a filler when the temperature is raised to 85 ℃, continuously heating, heating to 120-130 ℃ while stirring, starting vacuum pumping, keeping the temperature at 120-130 ℃, starting vacuum dehydration at the vacuum degree of less than or equal to 0.09Mpa, and stopping vacuum pumping when the moisture of the detected material is less than or equal to 0.05%;

(S3) cooling: starting stirring and cooling, adding the silane modified polyether and the rest raw materials except the silane coupling agent when the temperature is reduced to 45-50 ℃, then continuously stirring and heating to 90-95 ℃, vacuumizing and introducing nitrogen for protection and reacting at constant temperature for 2.5-4h, starting cooling after the reaction is finished, adding the silane modified polyether and the silane coupling agent when the temperature is reduced to below 40 ℃, and stirring at high speed for 0.5h to uniformly mix the materials;

(S4) discharging and packaging: discharging and packaging the uniformly mixed materials.

Technical Field

The invention relates to the technical field of sealant products, in particular to an environment-friendly sealant, and especially relates to an environment-friendly sealant and a preparation method thereof.

Background

The sealing glue is a sealing material which deforms along with the shape of the sealing surface, is not easy to flow, has certain cohesiveness, is an adhesive used for filling a configured gap to play a role in sealing, and has the functions of leakage prevention, water prevention, vibration prevention, sound insulation, heat insulation and the like.

It is made up by using dry or non-dry viscous material of asphalt, natural resin or synthetic resin, natural rubber or synthetic rubber, etc. as base material, adding inert fillers of talcum powder, clay, carbon black, titanium white powder and asbestos, etc. and adding plasticizer, solvent, solidifying agent and accelerator. Can be divided into three categories of elastic sealant, liquid sealing gasket and sealing putty. It is widely used for sealing building, transportation, electronic instrument and meter and parts.

However, in the process of implementing the technical solution in the prior art, the applicant finds that the following technical problems exist in the technical solution in the prior art:

the raw materials for preparing the sealant cause pollution to the environment in the production and application processes, and are not beneficial to environmental protection.

Disclosure of Invention

The invention aims to solve the technical problem of providing an environment-friendly sealant, solves the technical problem that raw materials for preparing the sealant in the prior art are not friendly to the environment, and at least achieves one of the technical effects of reducing the damage to the environment.

In order to solve the technical problems, the technical scheme of the invention is as follows:

an environment-friendly sealing adhesive is prepared from the following raw materials:

the bio-based water-based polyurethane resin comprises bio-based water-based polyurethane resin, nitrile rubber, polyether polyol, active nano calcium carbonate, silane modified polyether, a silane coupling agent, a plasticizer, a filler, a curing agent, a catalyst and a defoaming agent.

Preferably, the material is prepared from the following raw materials in parts by weight:

60-70 parts of bio-based waterborne polyurethane resin, 90-100 parts of nitrile rubber, 10-18 parts of polyether polyol, 30-40 parts of active nano calcium carbonate, 10-20 parts of silane modified polyether, 2-6 parts of silane coupling agent, 20-30 parts of plasticizer, 35-45 parts of filler, 10-15 parts of curing agent, 1-3 parts of catalyst and 1-3 parts of defoaming agent.

Preferably, the material is prepared from the following raw materials in parts by weight:

60-65 parts of bio-based waterborne polyurethane resin, 90-95 parts of nitrile rubber, 10-14 parts of polyether polyol, 30-35 parts of active nano calcium carbonate, 10-15 parts of silane modified polyether, 2-4 parts of silane coupling agent, 20-25 parts of plasticizer, 35-40 parts of filler, 10-13 parts of curing agent, 1-2 parts of catalyst and 1-2 parts of defoaming agent.

Preferably, the material is prepared from the following raw materials in parts by weight:

65-70 parts of bio-based waterborne polyurethane resin, 95-100 parts of nitrile rubber, 14-18 parts of polyether polyol, 35-40 parts of active nano calcium carbonate, 15-20 parts of silane modified polyether, 4-6 parts of silane coupling agent, 25-30 parts of plasticizer, 40-45 parts of filler, 13-15 parts of curing agent, 2-3 parts of catalyst and 2-3 parts of defoaming agent.

Preferably, the material is prepared from the following raw materials in parts by weight:

more specifically, 65 parts of bio-based waterborne polyurethane resin, 95 parts of nitrile rubber, 14 parts of polyether polyol, 35 parts of active nano calcium carbonate, 15 parts of silane modified polyether, 4 parts of silane coupling agent, 25 parts of plasticizer, 40 parts of filler, 13 parts of curing agent, 2 parts of catalyst and 2 parts of defoaming agent.

Particularly preferably, the material is prepared from the following raw materials in parts by weight:

70 parts of bio-based waterborne polyurethane resin, 90 parts of nitrile rubber, 14 parts of polyether polyol, 35 parts of active nano calcium carbonate, 15 parts of silane modified polyether, 4 parts of silane coupling agent, 25 parts of plasticizer, 40 parts of filler, 13 parts of curing agent, 2 parts of catalyst and 2 parts of defoaming agent.

Another aspect of the present invention is to provide a method for preparing an environmental protection sealant, comprising the following steps:

(S1) filler plasticizer preparation: firstly, drying the filler and the plasticizer at 120 ℃ until the moisture content is detected to be less than or equal to 0.1 percent for standby;

(S2) mixing and preparing main materials: adding bio-based waterborne polyurethane resin, nitrile rubber, polyether polyol and a plasticizer into a reaction kettle, heating, starting stirring, adding a filler when the temperature is raised to 85 ℃, continuously heating, heating to 120-130 ℃ while stirring, starting vacuum pumping, keeping the temperature at 120-130 ℃, starting vacuum dehydration at the vacuum degree of less than or equal to 0.09Mpa, and stopping vacuum pumping when the moisture of the detected material is less than or equal to 0.05%;

(S3) cooling: starting stirring and cooling, adding the silane modified polyether and the rest raw materials except the silane coupling agent when the temperature is reduced to 45-50 ℃, then continuously stirring and heating to 90-95 ℃, vacuumizing and introducing nitrogen for protection and reacting at constant temperature for 2.5-4h, starting cooling after the reaction is finished, adding the silane modified polyether and the silane coupling agent when the temperature is reduced to below 40 ℃, and stirring at high speed for 0.5h to uniformly mix the materials;

(S4) discharging and packaging: discharging and packaging the uniformly mixed materials.

One or more technical solutions provided by the present application have at least the following technical effects or advantages:

according to the technical scheme, as a series of technical means such as preparation of raw materials of the bio-based waterborne polyurethane resin, the nitrile rubber, the polyether polyol, the active nano calcium carbonate, the silane modified polyether, the silane coupling agent, the plasticizer, the filler, the curing agent, the catalyst and the defoaming agent are adopted, the characteristic that the preparation and application processes of the bio-based waterborne polyurethane resin do not pollute the environment is brought into play, the technical problem that the preparation and use of the sealant in the prior art are not environment-friendly enough is effectively solved, and the technical effect of reducing the damage of the sealant to the environment is further realized.

Detailed Description

The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The sealant is prepared by using dry or non-dry sticky substances such as asphaltum, natural resin or synthetic resin, natural rubber or synthetic rubber and the like as base materials, mixing with inert fillers such as talcum powder, white clay, carbon black, titanium pigment, asbestos and the like, and then adding a plasticizer, a solvent, a curing agent, an accelerator and the like. The raw materials of the sealant cause pollution or damage to the environment to a greater or lesser extent, which is not favorable for promoting environmental protection.

According to the technical scheme of the embodiment of the application, the environment-friendly sealing adhesive is provided, the problem of environmental pollution caused by the sealing adhesive manufacturing process in the prior art is solved, and the beneficial effect of reducing environmental damage is achieved by taking the bio-based waterborne polyurethane resin as one of raw materials.

The general idea of the embodiment of the invention for solving the technical problems is as follows:

the environment-friendly sealant is prepared from raw materials of 60-70 parts of bio-based waterborne polyurethane resin, 90-100 parts of nitrile rubber, 10-18 parts of polyether polyol, 30-40 parts of active nano calcium carbonate, 10-20 parts of silane modified polyether, 2-6 parts of silane coupling agent, 20-30 parts of plasticizer, 35-45 parts of filler, 10-15 parts of curing agent, 1-3 parts of catalyst and 1-3 parts of defoaming agent. The characteristic that the preparation and application processes of the bio-based waterborne polyurethane resin do not pollute the environment is exerted, so that the damage to the environment is reduced.

In addition, the bio-based water-based polyurethane resin also has the characteristic of biodegradability, and when the sealing ring is used up and needs to be discarded, the sealing ring is buried in the soil and can be decomposed by organisms so as to reduce the damage to the environment.

In order to better understand the above technical solutions, the following detailed descriptions will be provided with reference to specific embodiments.

Example 1

An environment-friendly sealing adhesive is prepared from the following raw materials:

60 parts of bio-based waterborne polyurethane resin, 90 parts of nitrile rubber, 18 parts of polyether polyol, 30-40 parts of active nano calcium carbonate, 20 parts of silane modified polyether, 6 parts of silane coupling agent, 30 parts of plasticizer, 45 parts of filler, 15 parts of curing agent, 3 parts of catalyst and 3 parts of defoaming agent.

The preparation method of the environment-friendly sealing adhesive is provided, and comprises the following steps:

(S1) filler plasticizer preparation: firstly, drying the filler and the plasticizer at 120 ℃ until the moisture content is detected to be less than or equal to 0.1 percent for standby;

(S2) mixing and preparing main materials: adding bio-based waterborne polyurethane resin, nitrile rubber, polyether polyol and a plasticizer into a reaction kettle, heating, starting stirring, adding a filler when the temperature is raised to 85 ℃, continuously heating, heating to 120-130 ℃ while stirring, starting vacuum pumping, keeping the temperature at 120-130 ℃, starting vacuum dehydration at the vacuum degree of less than or equal to 0.09Mpa, and stopping vacuum pumping when the moisture of the detected material is less than or equal to 0.05%;

(S3) cooling: starting stirring and cooling, adding the silane modified polyether and the rest raw materials except the silane coupling agent when the temperature is reduced to 45-50 ℃, then continuously stirring and heating to 90-95 ℃, vacuumizing and introducing nitrogen for protection and reacting at constant temperature for 2.5-4h, starting cooling after the reaction is finished, adding the silane modified polyether and the silane coupling agent when the temperature is reduced to below 40 ℃, and stirring at high speed for 0.5h to uniformly mix the materials;

(S4) discharging and packaging: discharging and packaging the uniformly mixed materials.

Example 2

An environment-friendly sealing adhesive is prepared from the following raw materials:

65 parts of bio-based waterborne polyurethane resin, 95 parts of nitrile rubber, 14 parts of polyether polyol, 35 parts of active nano calcium carbonate, 15 parts of silane modified polyether, 4 parts of silane coupling agent, 25 parts of plasticizer, 40 parts of filler, 13 parts of curing agent, 2 parts of catalyst and 2 parts of defoaming agent.

The preparation of this example is shown in example 1.

Example 3

An environment-friendly sealing adhesive is prepared from the following raw materials:

70 parts of bio-based waterborne polyurethane resin, 100 parts of nitrile rubber, 10 parts of polyether polyol, 30 parts of active nano calcium carbonate, 10 parts of silane modified polyether, 2 parts of silane coupling agent, 20 parts of plasticizer, 35 parts of filler, 10 parts of curing agent, 1 part of catalyst and 1 part of defoaming agent.

The preparation of this example is shown in example 1.

The seal rubber rings prepared in examples 1 to 3 were subjected to a degradation test, the details of which are as follows:

a sealing rubber ring with the thickness of 5mm and the inner diameter of 10cm is prepared according to the formula proportion and the method of the examples 1 to 3.

The comparative example is a sealing rubber ring of the same size prepared by using a non-bio-based aqueous polyurethane resin.

The seal rings of examples and comparative examples were placed in the same volume of soil, 100ml of hydrochloric acid was added, the mixture was placed in a THB test chamber and subjected to constant temperature test at 75 ℃ and 75% RH for 168 hours, and the surface condition was observed by taking out, and the results were as follows:

therefore, the use of the bio-based waterborne polyurethane resin is beneficial to biodegradation of the sealant.

In order to improve the material performance of the sealant, the mixed powder of shell powder and coconut shell powder with the weight percentage of 3 percent is added into the raw material of the example 1 to form an example 4.

The high-altitude dropping impact test is respectively carried out on the embodiment 1 and the embodiment 4, 5Kg of steel ball is used for repeatedly dropping and impacting the sealing rubber ring from 2 m high altitude, and the corresponding impact times of the product with deformation are recorded.

Therefore, the strength of the sealant can be improved by adding the shell powder and coconut shell powder mixed powder.

The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.