Preparation method for phenolic resin

A technology of phenolic resin and phenol, which is applied in the field of phenolic resin preparation, can solve the problems of affecting the performance of phenolic resin, high density of resin composition, and large peeling, etc., to achieve improved moisture absorption resistance, reduced hydroxyl content, and good flame retardancy Effect

Active Publication Date: 2011-02-16
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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Problems solved by technology

The Chinese patent document that application number is 200910025918.0 discloses a kind of preparation method of nitrogen-containing phenolic resin, comprises the following steps: after flexible phenolic compound, aldehyde compound and strongly acidic catalyst, water and amine compound are mixed and reacted, obtain containing A phenolic resin with a nitrogen content of 12% to 18%. Although the nitrogen-containing phenolic resin obtained by this method has auxiliary flame retardancy, the peeling of the phenolic resin becomes larger when punching at a low temperature
[0005] Studies have shown that nitrogen-phosphorus flame retardants have a synergistic flame retardant effect, and have better flame retardant efficiency and punching performance than nitrogen-based flame retardants or phosphorus-based flame retardants alone, such as the Chinese patent application number 200410069731.8 The literature discloses a phenolic resin composition containing melamine-modified novolac resin, phosphoric acid ester, epoxy resin and drying oil-modified phenolic resin, and the melamine and phosphoric acid ester in the phenolic resin composition synergistically exert a flame-retardant effect, It has good flame retardancy and punching processability, but the phosphate ester is added to the phenolic resin in the form of external addition, which makes the resulting resin composition denser and affects the performance of the phenolic resin

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  • Preparation method for phenolic resin
  • Preparation method for phenolic resin
  • Preparation method for phenolic resin

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preparation example Construction

[0021] The invention provides a kind of preparation method of phenolic resin, comprising:

[0022] Phenol, formaldehyde, amino-containing organic compound and phosphorus-containing organic compound are reacted under the condition of basic catalyst to obtain phenolic resin, and the phosphorus-containing organic compound is a compound containing phosphorus-oxygen double bond, phosphorus-hydrogen bond or hydroxyl.

[0023] The present invention uses amino-containing organic compounds and phosphorus-containing organic compounds as modifiers to modify the phenolic resin during the preparation of the phenolic resin, and introduces nitrogen-containing groups and phosphorus-containing groups into the structure of the phenolic resin. The nitrogen-containing group and the phosphorus-containing group exert a synergistic flame-retardant effect, so that the obtained phenolic resin has good flame retardancy. At the same time, the amino group-containing organic compound and phosphorus-contai...

Embodiment 1

[0045] Mix 100g of phenol, 10g of melamine, 5g of triphenyl phosphite, 190g of formaldehyde with a mass concentration of 37%, and 0.5g of sodium hydroxide, heat up to 80°C, react at a constant temperature for 3 hours, and then vacuum dehydrate until the polymer viscosity is 3000cp / 25 The reaction product was collected at ℃ to obtain a phenolic resin.

[0046] The solid content, free phenol, free aldehyde and moisture content of the phenolic resin were measured and the visual inspection results of the appearance were shown in Table 1. Table 1 shows the performance measurement results of the phenolic resin provided by the embodiments of the present invention and comparative examples.

[0047] Get described phenolic resin, take DC-193 produced by U.S. Dow Corning as a foam stabilizer, n-pentane as a foaming agent, and 70% p-toluenesulfonic acid as a curing agent to foam to obtain a foam product. The awakening density, oxygen index, thermal conductivity and water absorption were t...

Embodiment 2

[0050] Mix 100g of phenol, 15g of melamine, 10g of commercially available C9-13 hydroxyalkylene diphosphine, 190g of formaldehyde with a mass concentration of 37%, and 0.5g of sodium hydroxide, heat up to 80°C, react at a constant temperature for 3 hours, and then vacuum dehydrate to The reaction product was collected when the viscosity of the polymer was 3000cp / 25°C to obtain a phenolic resin.

[0051] The solid content, free phenol, free aldehyde and moisture content of the phenolic resin were measured and the visual inspection results of the appearance were shown in Table 1. Table 1 shows the performance measurement results of the phenolic resin provided by the embodiments of the present invention and comparative examples.

[0052] Get described phenolic resin, take DC-193 produced by U.S. Dow Corning as a foam stabilizer, n-pentane as a foaming agent, and 70% p-toluenesulfonic acid as a curing agent to foam to obtain a foam product. The awakening density, oxygen index, the...

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Abstract

The invention provides a preparation method for phenolic resin, which comprises the following steps: carrying out reaction on phenol, formaldehyde and organic compound containing amino and organic phosphorus compound under the condition of a basic catalyst to obtain the phenolic resin, wherein the organic phosphorus compound contains phosphorous and oxygen double bond, phosphorous and oxygen bond or hydroxyl. In the invention, the organic compound containing amino and the organic phosphorus compound are taken as modifiers to modify the phenolic resin; and nitrogenous groups and phosphoric groups are directly introduced in the structure of the phenolic resin and have the synergism inflaming retarding function so as to obtain the phenolic resin with excellent fire resistance. At the same time, the organic compound containing amino and the organic phosphorus compound enable the hydroxy content of the phenolic resin to be reduced and enable the hygroscopicity resistance of the phenolic resin to be improved.

Description

technical field [0001] The invention relates to the technical field of high molecular polymers, in particular to a preparation method of phenolic resin. Background technique [0002] Phenolic resin is a general term for resins formed by the reaction of phenols and aldehydes in the presence of catalysts, among which thermosetting phenolic resins formed from phenol and formaldehyde under alkaline catalyst conditions are the most common. Thermosetting phenolic resin products have good dimensional stability, acid resistance, mechanical properties and heat resistance, and are widely used in transportation, construction, military, mining and other industries. [0003] In the prior art, the purpose of improving the flame retardancy of the foamed phenolic resin is generally achieved by adding flame retardants such as halogen flame retardants and aluminum hydroxide during the process of preparing the foamed phenolic resin from the phenolic resin. However, halogen flame retardants, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G16/04
Inventor 唐路林李枝芳左兴信郑光亮
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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