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Modified alkyd resin for laminated board and preparation method and usage thereof

A technology for phenolic resin and laminate, which is applied in the field of modified phenolic resin for laminate and its preparation, can solve the problems of free phenol and aldehyde volatilization, environmental pollution, etc., and achieves the improvement of crosslinking density, reduction of precipitation and emission, and curing speed. quick effect

Inactive Publication Date: 2007-10-31
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Looking at the above-mentioned phenolic resin and modified resin system, it should be pointed out that whether it is to improve heat resistance or improve processing adhesion, the main raw materials for the main phenolic resin are still limited to phenol and formaldehyde systems. In resin production and use The curing process is still accompanied by the volatilization of free phenol and aldehyde and environmental pollution problems

Method used

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  • Modified alkyd resin for laminated board and preparation method and usage thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 200 parts by weight of 2,4-di-tert-butylphenol were added with 37 parts by weight of formaldehyde and 2 parts by weight of barium hydroxide under nitrogen protection state, heated to 80°C under stirring, and stirred for 5 hours. The reaction solution was in a transparent state; the gel time was determined to be 3 to 4 minutes, and the water produced by the reaction was collected and removed by distillation under reduced pressure. The molecular weight of the resin was determined to be between 450 and 600, and the temperature was lowered to 40°C, and 240 parts by weight of alcohol was added to dilute. Stir and react for 1 hour to obtain a uniform and transparent modified phenolic resin with a number average molecular weight between 450 and 600.

[0026] According to the preparation process route of the phenolic paper laminated board shown in Figure 1, the phenolic paper laminated board for electrical engineering was prepared.

[0027] (1). In a continuous manner, kraft pa...

Embodiment 2

[0034] 180 parts by weight of hexylphenol was added with 37 parts by weight of formaldehyde and 2 parts by weight of barium hydroxide under the protection state of nitrogen filling, heated to 80°C under stirring, and stirred and reacted for 5 hours, and the reaction solution was in a transparent state; The gelation time is 3-4min, distilled under reduced pressure, collect and remove the water produced by the reaction, measure the molecular weight of the resin between 450-600, cool down to 40°C, add 200 parts by weight of alcohol, stir for 1 hour, and get the number average Uniform and transparent modified phenolic resin with a molecular weight between 450 and 600.

[0035] According to the preparation process route of the phenolic paper laminated board shown in Figure 1, the phenolic paper laminated board for electrical engineering was prepared.

[0036] (1). In a continuous manner, kraft paper is impregnated with modified phenolic resin through a vertical dipping tank, and th...

Embodiment 3

[0043] 180 parts by weight of nonylphenol were added with 37 parts by weight of formaldehyde and 2 parts by weight of magnesium hydroxide under nitrogen protection, heated to 80°C under stirring, and stirred for 5 hours, and the reaction solution was transparent; Measure the gelation time at 3 to 4 minutes, distill under reduced pressure, collect and remove the water produced by the reaction, measure the molecular weight of the resin between 450 and 600, cool down to 40°C, add 200 parts by weight of methanol, and stir for 1 hour to obtain the number Uniform and transparent modified phenolic resin with an average molecular weight between 450 and 600.

[0044] In the way of continuous impregnation, impregnate the prepared modified phenolic resin with glass cloth, and bake it at 120°C for 7-10 minutes to obtain a prepreg. 2 Hot-press molding under pressure to prepare a phenolic glass cloth laminated board for electrical engineering.

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Abstract

The invention discloses a modified alkyd resin of laminated board, preparing method and usage in phenol resin domain, which is characterized by the following: adopting organic phenol monomer with linear hydrocarbon group and aldehydes monomer under the function of activator; getting the product; making the resin as transparent liquid with low viscosity and high dipping property; setting the number average molecular weight between 450 and 600 (GPC detection); decreasing evolution and discharge of free phenol effectively; adopting compatible diluent system. This resin possesses good storing stability, which is fit for dipping paper, cotton fabric and fiberglass cloth and so on reinforced materials.

Description

technical field [0001] The invention belongs to the field of phenolic resins, in particular to a modified phenolic resin for laminates, a preparation method and application thereof. Background technique [0002] In recent years, with the continuous expansion of the market for household and industrial laminates, the market demand for phenolic resin laminates, whether based on paper or cotton cloth and glass fiber cloth, is increasing. [0003] Phenolic resin is a kind of synthetic resin that was first discovered and produced industrially. It has a wide range of raw materials, low price, high mechanical strength, hard wear resistance, heat resistance, flame retardancy, resistance to most solvents, and electrical insulation properties. Good advantages, so far, the impregnation resin used in the actual laminate production process is still mainly phenolic resin system. However, phenolic resin has fast curing reaction speed and poor storage stability, which brings certain difficu...

Claims

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Application Information

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IPC IPC(8): C08G8/28B32B38/08
Inventor 王德生于存海刘琦焕周长琰杨士勇
Owner INST OF CHEM CHINESE ACAD OF SCI
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