JPS60124633A - Phenolic resin foam composition - Google Patents

Abstract

PURPOSE:A phenolic resin foam composition having a uniform and fine cell structure and a high open-cell content, obtained by using a lanolin alcohol/ alkylene oxide adduct as a foam stabilizer. CONSTITUTION:In a phenolic resin foam composition obtained by expanding a mixture of a resol phenolic resin precondensate, an acidic curing agent, an organic blowing agent, a foam stabilizer, etc.; said foam stabilizer comprises at least one kind of a lanolin alcohol/alkylene oxide adduct. The lanolin alcohol means an alcohol obtained by saponifying lanolin, and an example of this includes a mixed alcohol comprising 22% 13-33C aliphatic alcohol, 37% 27C cholesterol, 33% 30C triterpene alcohol and 2% miscellaneous alcohols. The average number of mol of the alkylene oxide added is 5-100, preferably 10-50.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a phenolic resin foam composition, and particularly to a phenolic resin foam composition that has a more uniform and finer cell structure than conventional ones and has a high closed cell ratio.

In recent years, its smoke resistance and low smoke emitting properties have been highly praised, and its use as a heat insulating material has been attempted.

However, compared to existing heat insulating materials such as polystyrene foam and rigid urethane foam, phenol foam resin foam has disadvantages such as brittle foam, slightly inferior heat insulating properties, and corrosion of metals. When used as a material, insulation properties have not yet been achieved.

Compared to other 1jM materials, phenol foam resin foam's inferior thermal insulation properties are largely due to its cell structure.

In other words, the cell structure of the phenolic resin foam has few closed cells and is mainly formed of open cells, resulting in poor heat insulation properties, which we believe can be solved by increasing the closed cell ratio.

A method for producing a phenolic resin foam is to mix an acidic curing agent, an organic foaming agent, a foaming agent, etc. to a resol type resin initial condensate, and foam the mixture at room temperature or under heating.

In this case, the component that greatly influences the structure of the foam is the surfactant used as a foaming agent. Use alone or in combination with nonionic surfactants such as oil fatty acid esters and polyoxyethylene dimethyl silicone! ! Anionic surfactants such as dioctyl sulfosuccine) Na salt, lauryl sulfate) Na salt, and polyoxyethylene nonyl phenyl ether sulfate) Na salt are used in combination with the above-mentioned nonionic surfactants. It has not yet been possible to obtain a closed cell ratio sufficient to provide satisfactory thermal insulation properties.

That is, in a phenolic resin foam composition obtained by mixing and foaming a resol type phenolic resin initial condensate with an acidic curing agent, an organic blowing agent, a foam stabilizer, etc., alkylene oxide addition of lanolin alcohol as a foam stabilizer is used. The object of the present invention is to provide a phenolic resin foam composition which has a uniform and fine cell structure and has a high closed cell ratio.

The lanolin alcohol used in the lanolin alcohol-fulkylene oxide adduct of the present invention refers to an alcohol obtained by saponifying lalinone, and examples thereof include the following mixed alcohols.

Fatty alcohol 013-03322% Cholesterol 02737% Triterpene alcohol C 39% 0 Other alcohols 2% This is an alkylene oxytoyone adduct of such a mixed lanolin alcohol, and the alkylene oxide is known as ethylene oxide, propylene oxide, etc. Addition polymerization is carried out by the synthesis method described in the following, and it is a single adduct of ethylene oxide and propylene oxide, a tablock adduct of both, or a random adduct.

The average number of moles of alkylene oxide added is 5 to 100, preferably 10 to 50.

The amount of the surfactant of the present invention to be distributed is 0.1 to 10 parts by weight, preferably 0.5 to 5 parts by weight, per 100 parts by weight of the resol type phenolic resin precondensation product.

Furthermore, the surfactant of the present invention can also be used in combination with at least 14 other conventionally used surfactants.

Next, examples of acidic curing agents that can be used in the present invention include hydrochloric acid,
Inorganic acids such as sulfuric acid and phosphoric acid, and organic acids such as monochloroacetic acid, P-)linisulfonic acid, benzenesulfonic acid, β-naphthalenesulfonic acid, and phenolsulfonic acid, all of which can act as strong acids, are preferred. Use one type or a mixture of two or more of these.

Examples of organic blowing agents include volatile petroleum compounds such as petroleum ether, naphtha, pentane, and hexane, low molecular weight fatty acid esters such as ethyl acetate, ketones such as methyl ethyl ketone and acetone, and lower aliphatic compounds such as methyl alcohol and ethyl alcohol. -hydric alcohols, and low-boiling halogenated hydrocarbons such as methylene chloride, carbon tetrachloride, trichloroethane, dichloromethylene, fluorotrichloromethane, and trifluorotrichloroethane.

The resol-type phenolic resin initial condensate used in the present invention is produced by reacting phenols and aldehydes in an equimolar ratio or in excess of the aldehyde in the presence of an alkaline catalyst.

Examples of phenols include phenol, cresol, ethylphenol, and propylphenol, and examples of aldehydes that react with phenols include formaldehyde, acetaldehyde, and the like.

In addition, alkaline catalysts include magnesium hydroxide, calcium hydroxide, barium hydroxide, sodium hydroxide,
Examples include potassium hydroxide, ammonium hydroxide, hexamethylenetetramine, and the like.

The surfactant of the present invention has a hydrophobic group with an aromatic aroma, so that a phenolic resin foam with a high foaming rate, which has fine and uniform cells upon foaming, can be obtained.

In addition, the phenolic resin foam composition of the present invention may include, for example,
Organic or inorganic fibrous substances or plasticizers such as ethylene glycol and tung oil may be added.

The present invention will be described in detail below with reference to Examples.

Example 1゜Phenol 1.0 mol Formaldehyde (37z aqueous solution) 2.0 mol Caustic soda 3% by weight relative to phenol A reaction was carried out according to a conventional method at the above blending ratio, and after the reaction was completed, the caustic soda was neutralized using lactic acid, Adjust the system to pH 6-7.

Next, dehydration was performed until the water content became 15% by weight to obtain a resol type phenol resin. This is called resin A.

To 100 parts by weight of resin A, 2.0 parts by weight of lanolin alcohol ethylene oxide (20 mol) as a foam stabilizer and 5.0 parts by weight of Freon 113 as a blowing agent are added and mixed with stirring.

After adding 15.0 parts by weight of Japanese spirits (purity 67%) and stirring and mixing, the mixture was immediately poured into a container and foamed and hardened.

As shown below, the obtained foam had a uniform cell structure and a high closed cell ratio.

Table 1 Examples 2 to 14 and Comparative Examples 1 to 5 Example 1 using 100 parts by weight of the resin A used in Example 1, 0 parts by weight of the foam stabilizer, and 15.0 parts by weight of 67% phenolsulfonic acid. A foam was obtained by foaming and curing in the same manner as above.

Table 2 shows the results when various surfactants were used.

Examples 15 to 17 Lanolin alcohol, ethylene oxide, propylene oxide block adduct (E O, p 20.0 mol, PO, P 8.0 mol) as a modifier for 100 parts by weight of resin A used in Example 1 ) and 8 parts by weight of n-pentane were added and mixed with stirring.

Next, as a curing catalyst, 67% para-toluenesulfonic acid 20
After adding parts by weight and stirring and mixing, the mixture was immediately poured into a container and foamed and hardened to obtain a foam.

Table 3 shows the results when the amount of foam stabilizer added was varied.

Table-3 Applicant Dai-Kogyo Seiyaku Co., Ltd. Procedural amendment Commissioner of the Patent Office ■Display of incident 1981 Patent Kenga 233407 No. 2, name of the invention Phenolic resin foam composition 4. Date of amendment order spontaneous correction 5. Number of inventions increased by amendment that's all Procedural amendment March 14, 1982 1981 Patent Application No. 33407 3. Person who makes corrections Relationship to the incident: Patent applicant 4. Date of amendment order spontaneous correction 5. Number of inventions increased by amendment ・2nd line from page 9 of the statement that's all

Claims (1)

[Claims] A phenolic resin foam composition comprising at least one component of an alkylene oxide adduct of lanolin alcohol as a foam stabilizer.