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Linetype bisphenol F phenolic epoxy resin and preparation method thereof

A technology of novolac epoxy resin and phenolic resin, which is applied in the field of online bisphenol F novolac epoxy resin and its preparation, can solve the problems of low crosslinking density, reduced impact resistance, and large molecular chain rigidity of the product, and achieve the goal of preparing The method is reliable and easy to implement, the effect of impact resistance is improved, and the crosslinking density is high

Inactive Publication Date: 2009-12-23
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Bisphenol A epoxy resin is currently the most widely used general-purpose epoxy resin on the market. It is widely used in many aspects such as coatings, adhesives, engineering plastics and composite materials, and civil engineering materials. However, it has two disadvantages: (1) due to the dual The isopropyl structure in the phenol A molecule restricts the rotation of the chain, thus making the molecular chain more rigid and reducing the impact resistance of the system; (2) bisphenol A epoxy resin is a two-functional molecule, and its curing The cross-linking density of the final product is not high, resulting in low heat resistance
Novolac epoxy resin is a multifunctional epoxy resin produced by epoxidizing novolac as raw material. It has both the high thermal stability of phenolic resin and the high reactivity of epoxy resin. There are more than two epoxy groups in the molecule, so the cured product has a high crosslinking density, excellent heat resistance, strength, modulus, electrical insulation, etc., and is widely used in electronic packaging and copper clad laminates and other electronic industries. However, since the molecular structure is mainly connected by benzene ring rigid groups, the cured product is more brittle

Method used

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  • Linetype bisphenol F phenolic epoxy resin and preparation method thereof

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Effect test

Embodiment 1

[0030] Components: novolac bisphenol F phenolic resin (softening point: 58° C.): 200 g, epichlorohydrin: 900 g, benzyltrimethylammonium chloride: 3 g, NaOH solution (50%): 164 g, toluene: 470 g.

[0031] Preparation method: Add the raw materials novolac bisphenol F phenolic resin and epichlorohydrin into a 2000ml three-necked flask according to the ratio, start stirring to completely dissolve the novolac bisphenol F phenolic resin, then add benzyltrimethylammonium chloride and stir Evenly, then raise the temperature to 100°C for 2 hours, then control the reaction temperature at 80°C, add 123g NaOH solution dropwise at a constant speed for 2 hours, keep the temperature for 1 hour after the dropwise addition, and then use filter cloth to filter out the salt generated by the reaction , take off epichlorohydrin under reduced pressure, obtain thick linear bisphenol F novolac epoxy resin, then add 150g toluene in the there-necked flask, stir and dissolve thick linear bisphenol F novo...

Embodiment 2

[0038] Components: novolac bisphenol F phenolic resin (softening point 106°C): 200g, epichlorohydrin: 1100g, tetramethylammonium chloride: 1.6g, NaOH solution (50%): 188g, NaOH solution (10% ): 20g, butanone: 400g.

[0039] Preparation method: Add the raw materials novolac bisphenol F phenolic resin and epichlorohydrin into a 2000mi three-necked flask according to the ratio, start stirring to completely dissolve the novolac bisphenol F phenolic resin, then add tetramethylammonium chloride and stir evenly, Then the temperature was raised to 65° C. for 3 hours, and then, 188g NaOH solution (concentration was 50%) was added dropwise at a constant speed with a constant pressure dropping funnel, while the there-necked flask was controlled to be negative pressure (pressure controlled by dropping lye speed and The same rate of detached liquid shall prevail), add epichlorohydrin every 0.5 hours (the additional amount should be equal to the detached amount), and the dripping time is 2....

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Abstract

The invention relates to a novolac bisphenol F novolak epoxy resin and a preparation method thereof. The technical feature is that the components are novolac bisphenol F phenolic resin, quaternary ammonium salt, epichlorohydrin, sodium hydroxide, water, toluene or methyl ethyl ketone; the dosage of quaternary ammonium salt is 0.08~ 3g, the dosage of epichlorohydrin is 3-14mol of epichlorohydrin per 1mol of phenolic hydroxyl group, the dosage of sodium hydroxide is 1.1-1.5mol of sodium hydroxide per 1mol of phenolic hydroxyl group, and the mass of toluene is the mass of novolac bisphenol F phenolic resin 1.5 to 3 times of that. Beneficial effect: the isopropyl structure in the bisphenol A epoxy resin is replaced by the methylene structure, the rotation of the chain segment will not be restricted, the rigidity of the chain will be reduced, and it is beneficial to the improvement of the impact resistance. In addition, since it is a multifunctional molecule, it improves the heat resistance of the resin. By controlling the degree of polymerization n, a series of products from liquid to solid bisphenol F novolac epoxy resin can be obtained.

Description

technical field [0001] The invention relates to a novolac bisphenol F novolak epoxy resin and a preparation method thereof. Background technique [0002] Bisphenol A epoxy resin is currently the most widely used general-purpose epoxy resin on the market. It is widely used in many aspects such as coatings, adhesives, engineering plastics and composite materials, and civil engineering materials. However, it has two disadvantages: (1) due to the dual The isopropyl structure in the phenol A molecule limits the rotation of the chain, thus making the molecular chain more rigid, resulting in a reduction in the impact resistance of the system; (2) bisphenol A epoxy resin is a two-functional molecule, and its curing The cross-linking density of the final product is not high, resulting in low heat resistance. Novolak epoxy resin is a multifunctional epoxy resin produced by epoxidizing novolac as raw material. It has both the high thermal stability of phenolic resin and the high react...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/08
Inventor 陈立新景晨丽宋家乐陈伟伟王建宇
Owner NORTHWESTERN POLYTECHNICAL UNIV
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