阅读说明：本技术 一种环保型热固性降温水帘用改性酚醛树脂及合成方法 (Environment-friendly modified phenolic resin for thermosetting cooling water curtain and synthesis method ) 是由 白超阳 于 2020-06-15 设计创作，主要内容包括：本发明公开一种环保型热固性降温水帘用改性酚醛树脂,所采用的原料包括天然植物酚,甲醛,三乙胺,尿素,改性剂。其中加入重量份数为：天然植物酚25-30份,甲醛40-50份,三乙胺0.8-0.9份,尿素10-15份；本发明充分解决了白乳胶和脲醛树脂固化后的弊端。本发明为热固性树脂,固化后不会和水、空气、紫外线、强酸、强碱产生反应。这种树脂固化后性能稳定、强度高、粘接力强、耐候性强等特点。本发明充分解决了白乳胶和脲醛树脂生产降温水帘蜂窝纸的不耐候性、吸水性、粘接力降低的弊端。(The invention discloses an environment-friendly modified phenolic resin for a thermosetting cooling water curtain. Wherein the adding parts by weight are as follows: 25-30 parts of natural plant phenol, 40-50 parts of formaldehyde, 0.8-0.9 part of triethylamine and 10-15 parts of urea; the invention fully solves the defects of the white latex and the cured urea-formaldehyde resin. The invention is thermosetting resin, which can not react with water, air, ultraviolet ray, strong acid and strong alkali after being cured. The resin has the characteristics of stable performance, high strength, strong bonding force, strong weather resistance and the like after being cured. The invention fully solves the defects of poor weather resistance, water absorption and bonding force of the cooling water curtain honeycomb paper produced by white latex and urea-formaldehyde resin.)

1. The modified phenolic resin for the environment-friendly thermosetting cooling water curtain is characterized by comprising the following components in parts by weight: the raw materials comprise natural plant phenol, formaldehyde, triethylamine, urea and a modifier, and the weight parts of the raw materials are as follows: 25-30 parts of natural plant phenol, 40-50 parts of formaldehyde, 0.8-0.9 part of triethylamine and 10-15 parts of urea.

2. The modified phenolic resin for the environment-friendly thermosetting cooling water curtain as claimed in claim 1, wherein: in the area south of the Yangtze river, the modifier is paraffin and melamine, and the modifier is added with the following components in parts by weight: 5-7 parts of paraffin and 7-9 parts of melamine.

3. The modified phenolic resin for the environment-friendly thermosetting cooling water curtain as claimed in claim 1, wherein: in the area north of Yangtze river, the modifier is aqueous castor oil and lignin, and the modifier is added with the following components in parts by weight: 3-8 parts of water-based castor oil and 6-9 parts of lignin.

4. The modified phenolic resin for the environment-friendly thermosetting cooling water curtain as claimed in claim 1, wherein: the plant phenol is cardanol or eugenol, and the fineness is less than or equal to 10 um.

5. The method for synthesizing the modified phenolic resin for the environment-friendly thermosetting cooling water curtain as claimed in claim 1, wherein the method comprises the following steps: is suitable for the areas in the south of the Yangtze river: the method comprises the following steps: the weight parts of the added raw materials are as follows: 25-30 parts of natural plant phenol, 40-50 parts of formaldehyde, 0.8-0.9 part of triethylamine and 10-15 parts of urea; 5-7 parts of paraffin and 7-9 parts of melamine; step two: adding plant phenol and paraffin into a reaction kettle, heating to 40-45 ℃, keeping for thirty minutes, fully fusing the plant phenol and the paraffin, and modifying the plant phenol; step three: after phenol modification, adding formaldehyde, heating to 45-50 ℃, and pumping in triethylamine; step four: pumping in triethylamine, heating to 55-60 ℃, pumping in melamine for secondary modification, and keeping the temperature for 60 minutes; step five: after the constant temperature is finished, heating to 70-75 ℃, keeping the temperature constant, and measuring the water solubility; step six: after the water is dissolved to be qualified, immediately cooling, pumping into urea, cooling to 50-55 ℃, and keeping the temperature for 30 minutes; after the constant temperature is finished, cooling to room temperature to synthesize the modified phenolic resin for the environment-friendly thermosetting cooling water curtain.

6. The method for synthesizing the modified phenolic resin for the environment-friendly thermosetting cooling water curtain as claimed in claim 1, wherein the method comprises the following steps: is suitable for the areas north of the Yangtze river: the method comprises the following steps: the weight parts of the added raw materials are as follows: 25-30 parts of natural plant phenol, 40-50 parts of formaldehyde, 0.8-0.9 part of triethylamine and 10-15 parts of urea; 3-8 parts of water-based castor oil and 6-9 parts of lignin; step two: adding plant phenol and water-based castor oil into a reaction kettle, heating to 40-45 ℃, keeping for thirty minutes, fully fusing the plant phenol and the water-based castor oil, and modifying the plant phenol; step three: after phenol modification, adding formaldehyde, heating to 45-50 ℃, and pumping in triethylamine; step four: pumping triethylamine, heating to 55-60 ℃, pumping lignin for secondary modification, and keeping the temperature for 60 minutes; step five: after the constant temperature is finished, heating to 70-75 ℃, keeping the temperature constant, and measuring the water solubility; step six: after the water is dissolved to be qualified, immediately cooling, pumping into urea, cooling to 50-55 ℃, and keeping the temperature for 30 minutes; after the constant temperature is finished, cooling to room temperature to synthesize the modified phenolic resin for the environment-friendly thermosetting cooling water curtain.

Technical Field

The invention relates to the field of chemical engineering, is mainly used in the technical field of production and application of artificial cooling water curtain honeycomb paper, and particularly relates to an environment-friendly modified phenolic resin for a thermosetting cooling water curtain and a synthesis method thereof.

Background

The cooling water curtain honeycomb paper is formed by tiny corrugated paper and resin, the resin is firmly bonded between the corrugated paper, so that the corrugated paper has pressure resistance and tensile resistance, the stability, the waterproofness, the weather resistance and the scouring resistance of the corrugated paper under the irradiation of normal-temperature ultraviolet rays are promoted, and the service life of the honeycomb paper is prolonged. The adhesives of the cooling water curtain honeycomb paper at the present stage are mainly white latex and urea-formaldehyde resin, the white latex is also called vinyl acetate resin, and the white latex is used for bonding wood boards and common paper and is reduced and decomposed by long-term contact with ultraviolet rays and water vapor. The urea-formaldehyde resin is synthesized from urea and formaldehyde, the formaldehyde and the urea are volatile and easily reducible substances, and the synthesized urea-formaldehyde resin is also volatile and easily reducible. The two resins have the defects of reducibility, water absorbability, reduced adhesive force, poor weather resistance and the like after contacting with water and air for a long time. Both the white latex and the urea-formaldehyde resin are water-soluble resins, and slow hydrolyzability still exists after curing. The adhesive force generated after the white latex and the urea-formaldehyde resin honeycomb paper are contacted with the air for a long time is reduced.

Phenolic resin in the current market is applied to cooling cascade honeycomb paper, can produce not waterproof after the solidification, does not resist ultraviolet ray, if expose under the ultraviolet ray for a long time, easy ageing can cause the intensity of cooling cascade end product to become low, and life shortens.

Disclosure of Invention

The invention aims to solve the problems in the prior art, solve the water-intolerance of the white latex and urea-formaldehyde resin honeycomb paper, and solve the problems of water absorption generated after the white latex and urea-formaldehyde resin honeycomb paper is contacted with water for a long time and the bonding force generated after the white latex and urea-formaldehyde resin honeycomb paper is contacted with air for a long time. Phenolic resin is a long-history adhesive, and has the characteristics of acid resistance, alkali resistance, high strength after curing and the like. The resin is modified by paraffin, melamine, castor oil and the like for many times, so that the cured phenolic resin has higher waterproofness, ultraviolet resistance and scouring resistance.

The invention discloses an environment-friendly modified phenolic resin for a thermosetting cooling water curtain.

Wherein the adding parts by weight are as follows: 25-30 parts of natural plant phenol, 40-50 parts of formaldehyde, 0.8-0.9 part of triethylamine and 10-15 parts of urea;

the modifier is paraffin and melamine, and the modifier comprises the following components in parts by weight: 5-7 parts of paraffin and 7-9 parts of melamine;

as the climate in the south of the Yangtze river is damp and hot, the temperature difference in four seasons is small, and industrial water in the south is mixed with some soil particles and modified by selecting paraffin and melamine, the abrasion resistance and the impact resistance of a final product can be improved.

The modifier is aqueous castor oil and lignin, and the modifier comprises the following components in parts by weight: 3-8 parts of water-based castor oil and 6-9 parts of lignin;

as the temperature difference in the areas north of the Yangtze river is large all the year round, and the industrial water in the north is alkaline and salt, the aqueous castor oil and the lignin are selected for modification, so that the corrosion and scouring resistance of the final product to alkali and salt can be improved.

Wherein the plant phenol is cardanol or eugenol, and the fineness is less than or equal to 10 um;

the fineness of the high-quality plant phenol selected by the invention is less than or equal to 10um, the fineness of the synthesized phenolic resin can reach less than or equal to 10um, impurities are not generated, the filtering is not needed, the chemical reaction at the later stage is more sufficient, the use process of the final product and the miscibility of water can be improved, and the use and stirring process is more convenient.

The method improves the quality of products by improving the process and using higher proportion of plant phenol and formaldehyde, saves petroleum resources and reduces environmental pollution!

The invention discloses a synthetic method of modified phenolic resin for an environment-friendly thermosetting cooling water curtain, which comprises the following steps:

is suitable for the areas in the south of the Yangtze river:

the method comprises the following steps: the weight parts of the added raw materials are as follows: 25-30 parts of natural plant phenol, 40-50 parts of formaldehyde, 0.8-0.9 part of triethylamine and 10-15 parts of urea; 5-7 parts of paraffin and 7-9 parts of melamine;

step two: adding plant phenol and paraffin into a reaction kettle, heating to 40-45 ℃, keeping for thirty minutes, fully fusing the plant phenol and the paraffin, and modifying the plant phenol;

step three: after phenol modification, adding formaldehyde, heating to 45-50 ℃, and pumping in triethylamine;

step four: pumping in triethylamine, heating to 55-60 ℃, pumping in melamine for secondary modification, and keeping the temperature for 60 minutes;

step five: after the constant temperature is finished, heating to 70-75 ℃, keeping the temperature constant, and measuring the water solubility;

step six: after the water is dissolved to be qualified, immediately cooling, pumping into urea, cooling to 50-55 ℃, and keeping the temperature for 30 minutes; after the constant temperature is finished, cooling to room temperature to synthesize the modified phenolic resin for the environment-friendly thermosetting cooling water curtain.

Is suitable for the areas north of the Yangtze river:

the method comprises the following steps: the weight parts of the added raw materials are as follows: 25-30 parts of natural plant phenol, 40-50 parts of formaldehyde, 0.8-0.9 part of triethylamine and 10-15 parts of urea; 3-8 parts of water-based castor oil and 6-9 parts of lignin;

step two: adding plant phenol and water-based castor oil into a reaction kettle, heating to 40-45 ℃, keeping for thirty minutes, fully fusing the plant phenol and the water-based castor oil, and modifying the plant phenol;

step three: after phenol modification, adding formaldehyde, heating to 45-50 ℃, and pumping in triethylamine;

step four: pumping triethylamine, heating to 55-60 ℃, pumping lignin for secondary modification, and keeping the temperature for 60 minutes;

step five: after the constant temperature is finished, heating to 70-75 ℃, keeping the temperature constant, and measuring the water solubility;

step six: after the water is dissolved to be qualified, immediately cooling, pumping into urea, cooling to 50-55 ℃, and keeping the temperature for 30 minutes; after the constant temperature is finished, cooling to room temperature to synthesize the modified phenolic resin for the environment-friendly thermosetting cooling water curtain.

The invention has the beneficial effects that:

the invention fully solves the defects of the white latex and the cured urea-formaldehyde resin. The invention is thermosetting resin, which can not react with water, air, ultraviolet ray, strong acid and strong alkali after being cured. The resin has the characteristics of stable performance, high strength, strong bonding force, strong weather resistance and the like after being cured. The invention fully solves the defects of poor weather resistance, water absorption and bonding force of the cooling water curtain honeycomb paper produced by white latex and urea-formaldehyde resin.

The invention is synthesized by phenol (plant phenol), formaldehyde, urea, paraffin, melamine and the like, and fundamentally solves the defects of easy volatilization and easy reduction of white latex and urea-formaldehyde resin. The thermosetting water-soluble phenolic resin can eliminate or reduce the pollution of organic solvent and reduce the production cost by using water to replace the organic solvent (ethanol and the like). Therefore, the soluble phenolic resin is widely applied to products such as adhesives (used for preparing glass cloth, cotton cloth, paper-based laminated plates, fiber boards, bakelite boards, shaving boards and the like), glass fiber soaks, various coatings and the like. The invention reduces the use of Freon air conditioner, and reduces the air pollution and the electric energy consumption.

Detailed Description

The climate temperature difference of the Liaoliang, south and north regions in China is large, and the invention has various embodiments aiming at the temperature climate difference.

The present invention is further described below with reference to specific examples, which are provided only for illustrating the present invention and are not intended to limit the scope of the present invention.