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Flame-retardant bromocarbon phenolic aldehyde adhesive and preparation method thereof

The technology of carbon phenolic adhesive and bromocarbon phenolic resin is applied in the field of preparation of flame retardant bromocarbon phenolic adhesive, which can solve the problems of limiting the application range of casting cores and molds, not having high temperature flame retardant, etc. Accurate, not easy to deform, good effect of casting falling sand

Inactive Publication Date: 2009-09-02
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The base resin in the existing adhesives often does not have the characteristics of high temperature flame retardancy, which limits the application range of casting cores and molds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the flame-retardant bromocarbon phenolic adhesive of the present invention is to add 140.8 parts of p-bromophenol, 126.4 parts of phenol, 215.2 parts of formaldehyde and 13.6 parts of ammonia water into a three-necked bottle, start stirring, heat up to 60°C for 60 minutes, and stop Heating, the reaction will automatically release heat, keep at 95-98°C after boiling, and cool down after 40 minutes of reaction. Remove moisture and unreacted formaldehyde, p-bromophenol and phenol under reduced pressure at a temperature of 60-70°C, cool to below 40°C, add 152.0 parts of ethanol and 152.0 parts of acetone, stir evenly, and filter the material with a 60-mesh copper mesh , to obtain bromocarbon phenolic resin.

[0022] Technical indicators of bromocarbon phenolic resin:

[0023] project index Exterior Yellow-brown transparent liquid Solid content / % 50±2 Free phenol / %, ≤ 2.5 Viscosity / s (No. 4 cup) 12～200

[00...

Embodiment 3

[0028] 1 p-Bromophenol 150.4 160.0

[0029] 2 Phenol 107.2 85.6

[0030] 3 Formaldehyde 228.8 244.8

[0031] 4 Ammonia 12.8 12.0

[0032] 5 Ethanol 150.4 148.8

[0033] 6 Acetone 150.4 148.8

[0034] (2) Formula of flame retardant bromocarbon phenolic adhesive: unit: g

[0035] Serial number Material name Embodiment 2 Embodiment 3

[0036] 1 Bromocarbon phenolic resin 280.0 380.0

[0037] 2 tricresyl phosphate 72.0 52.0

[0038] 3 Organosilane coupling agent 24.0 16.0

[0039] 4 Mica powder 64.0 52.0

[0040] 5 Glass fiber 120.0 80.0

[0041] 6 Solvent 240.0 220.0

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PUM

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Abstract

The invention discloses a flame-retardant bromocarbon phenolic aldehyde adhesive and a preparation method thereof. The adhesive comprises the following compositions in percentage by mass: 35.0 to 60.0 percent of bromocarbon phenolic aldehyde resin, 2.0 to 10.0 percent of tritolyl phosphate, 1.0 to 3.0 percent of organic silane coupling agent, 2.0 to 8.0 percent of mica powder, 5.0 to 15.0 percent of glass fiber, and 25.0 to 35.0 percent of solvent. The preparation method comprises the following steps: placing the bromocarbon phenolic aldehyde resin, the tritolyl phosphate, the organic silane coupling agent, the mica powder, the glass fiber, and the solvent into an enamel jar; dispersing the mixture at high speed for 3 to 5 minutes; grinding and dispersing the mixture for 2 times in a cone mill; and obtaining the flame-retardant bromocarbon phenolic aldehyde adhesive.

Description

technical field [0001] The invention relates to a phenolic adhesive, in particular to a method for preparing a flame-retardant bromocarbon phenolic adhesive. Background technique [0002] In the foundry field, the cores and molds used to manufacture metal castings are prepared from adhesives and foundry sands (such as silica sand, chrome sand, zircon sand), and the adhesives include phenolic resins, epoxy resins, polyurethane resins, and other types. Phenolic resin, as the earliest synthetic resin variety used in the adhesive industry, has been widely used in the foundry industry in recent years. The cores and molds made of it have high strength, are not easy to deform, have accurate shape dimensions, good sand falling performance of castings, and smooth surfaces. high merit. [0003] Patent CN1583926A discloses a furfural-octyl alcohol modified phenolic binder and its production method. It has the advantages of simple production process and low production cost. The physica...

Claims

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Application Information

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IPC IPC(8): C08L61/08C08K13/04B22C1/22C08K5/523C08K5/54C08K3/34C08K7/14
Inventor 杨保平崔锦峰俞树荣周应萍郭军红崔定伟杜勇
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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