阅读说明：本技术 一种用于墙体的耐黄变保温材料 (Anti-yellowing heat insulation material for wall ) 是由 祝春夏 肖杰 于 2020-05-29 设计创作，主要内容包括：本发明公开了一种用于墙体的耐黄变保温材料,包括以下重量份的原料：改性酚醛树脂100-150份、硅藻土18-25份、聚苯乙烯15-20份、十二烷基苯磺酸钠6-10份；以改性酚醛树脂为基体,采用改性剂对酚醛树脂进行改性,具体为：首先,以三聚氯氰和间萘二酚为原料,在AlCl<Sub>3</Sub>的催化下,发生傅克反应,得到了式M1所示的改性剂,接着在碱催化剂碳酸铯的催化下,改性剂与酚醛树脂发生醚化反应,即得到了改性酚醛树脂,醚化降低了酚醛树脂的酸性,提高了酚醛树脂的韧性；另外,酚醛树脂上以化学键的方式连接了三嗪抗紫外官能结构,可长久的维持酚醛树脂的抗紫外性能,提高了酚醛树脂保温材料的耐黄变性能。(The invention discloses a yellowing-resistant heat-insulating material for a wall, which comprises the following raw materials in parts by weight: 100-150 parts of modified phenolic resin, 18-25 parts of diatomite, 15-20 parts of polystyrene and 6-10 parts of sodium dodecyl benzene sulfonate; the modified phenolic resin is used as a matrix, and is modified by a modifier, and the method specifically comprises the following steps: firstly, cyanuric chloride and m-naphthalenediol are used as raw materials, and are put into AlCl 3 Under the catalysis of the alkali catalyst cesium carbonate, a Friedel-crafts reaction is carried out to obtain a modifier shown as a formula M1, and then under the catalysis of the alkali catalyst cesium carbonate, the modifier and the phenolic resin are subjected to an etherification reaction to obtain a modified phenolic resin, wherein the etherification reduces the acidity of the phenolic resin, and the toughness of the phenolic resin is improved; in addition, on phenolic resinsThe triazine uvioresistant functional structure is connected in a chemical bond mode, so that the uvioresistant performance of the phenolic resin can be maintained for a long time, and the yellowing resistance of the phenolic resin heat-insulating material is improved.)

1. A yellowing-resistant heat-insulating material for a wall body is characterized in that: the feed comprises the following raw materials in parts by weight: 100-150 parts of modified phenolic resin, 18-25 parts of diatomite, 15-20 parts of polystyrene and 6-10 parts of sodium dodecyl benzene sulfonate.

2. The yellowing-resistant heat-insulating material for the wall body as claimed in claim 1, wherein: the preparation method of the modified phenolic resin specifically comprises the following steps:

the reaction process is as follows:

s1 preparation of modifier

Weighing 100mmol of cyanuric chloride, a catalyst and 500ml of solvent toluene, adding 205-210mmol of M-naphthalenediol while stirring, heating to 85-90 ℃, reacting for 3-5h under heat preservation, adding 500ml of deionized water, removing the solvent by using a rotary evaporator, and washing the obtained solid with water to obtain the modifier shown in the formula M1;

s2 preparation of modified phenolic resin

Weighing 12-14.5g of modifier A1, 105-125g of solid phenolic resin powder and 1.5-2L of solvent isopropanol, adding into a reaction kettle, stirring and dissolving completely, adding an alkali catalyst cesium carbonate, stirring and heating to 75-85 ℃ after adding, preserving heat for reaction for 3-5h, naturally cooling to room temperature after reaction, carrying out suction filtration, washing with water, and drying to obtain the modified phenolic resin shown in the formula M.

3. The yellowing-resistant heat-insulating material for the wall body as claimed in claim 2, wherein: in step S1, the catalyst is AlCl₃The amount of catalyst added was 102-105 mmol.

4. The yellowing-resistant heat-insulating material for the wall body as claimed in claim 2, wherein: in step S1, the alkali catalyst is cesium carbonate, and the addition amount of the alkali catalyst is 6-9 g.

Technical Field

The invention belongs to the technical field of materials, and particularly relates to a yellowing-resistant heat-insulating material for a wall.

Background

The phenolic resin thermal insulation material belongs to an organic thermosetting efficient thermal insulation material, and particularly, the technical performance of the applied thermal insulation material is higher and the market demand is larger and larger as the energy saving rate of buildings is gradually improved in recent years. In the application of heat-insulating materials for building, not only the physical and technical properties are required to be high, but also the fire-proof performance must be achieved. The phenolic insulation material produced by the phenolic resin has good fire penetration resistance, high temperature resistance and low smoke performance, but the phenolic insulation material has the biggest defects of high brittleness and high acidity. Due to the fact that the phenolic aldehyde heat-insulating material is high in brittleness, the problems that the phenolic aldehyde heat-insulating material is prone to powder falling, low in elasticity, low in compression strength, unqualified in heat conductivity coefficient and the like exist when the phenolic aldehyde heat-insulating material is used, inherent excellent fireproof performance cannot be well utilized, and therefore expansion of application technology of the phenolic aldehyde heat-insulating material is affected, and meanwhile inconvenience is brought to transportation and construction. Because of large acidity, the phenolic aldehyde heat-insulating material can have certain corrosivity when contacting with metal and cement-based materials, and the application range of the phenolic aldehyde heat-insulating material is limited; in addition, when the phenolic aldehyde heat-insulating material is used in an external environment, the phenolic aldehyde heat-insulating material is exposed to wind and sunlight for a long time, and the heat-insulating board is easy to age, so that the phenomena of fading, yellowing, pulverization and the like are generated.

Disclosure of Invention

The invention aims to provide a yellowing-resistant heat-insulating material for a wall.

The purpose of the invention can be realized by the following technical scheme:

a yellowing-resistant heat-insulating material for a wall comprises the following raw materials in parts by weight: 100-150 parts of modified phenolic resin, 18-25 parts of diatomite, 15-20 parts of polystyrene and 6-10 parts of sodium dodecyl benzene sulfonate.

Further, the preparation method of the modified phenolic resin specifically comprises the following steps:

the reaction process is as follows:

s1 preparation of modifier

Weighing 100mmol of cyanuric chloride, a catalyst and 500ml of solvent toluene, adding 205-210mmol of M-naphthalenediol while stirring, heating to 85-90 ℃, reacting for 3-5h under heat preservation, adding 500ml of deionized water, removing the solvent by using a rotary evaporator, and washing the obtained solid with water to obtain the modifier shown in the formula M1;

s2 preparation of modified phenolic resin

Weighing 12-14.5g of modifier A1, 105-125g of solid phenolic resin powder and 1.5-2L of solvent isopropanol, adding into a reaction kettle, stirring and dissolving completely, adding an alkali catalyst cesium carbonate, stirring and heating to 75-85 ℃ after adding, preserving heat for reaction for 3-5h, naturally cooling to room temperature after reaction, carrying out suction filtration, washing with water, and drying to obtain the modified phenolic resin shown in the formula M.

Further, in step S1, the catalyst is AlCl₃The amount of catalyst added was 102-105 mmol.

Further, in step S1, the alkali catalyst is cesium carbonate, and the amount of the alkali catalyst added is 6 to 9 g.

The invention has the beneficial effects that:

the invention provides a yellowing-resistant heat-insulating material for a wall, which takes modified phenolic resin as a matrix and adopts a modifier to modify the phenolic resin, and specifically comprises the following steps: firstly, cyanuric chloride and m-naphthalenediol are used as raw materials, and are put into AlCl₃Under the catalysis of the alkali catalyst cesium carbonate, a Friedel-crafts reaction is carried out to obtain a modifier shown as a formula M1, and then under the catalysis of the alkali catalyst cesium carbonate, the modifier and the phenolic resin are subjected to an etherification reaction to obtain a modified phenolic resin, wherein the etherification reduces the acidity of the phenolic resin, and the toughness of the phenolic resin is improved; in addition, the phenolic resin is connected with a triazine uvioresistant functional structure in a chemical bond mode, so that the uvioresistant performance of the phenolic resin can be maintained for a long time, and the yellowing resistance of the phenolic resin thermal insulation material is improved.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.