CN101880376A - Ageing-resistant epoxy resin curing agent - Google Patents

Abstract

The invention discloses ageing-resistant epoxy resin curing agent. General room-temperature epoxy resin curing agent of T31, 703, 593 and the like produced in China at present can meet the basic requirements of users, but after two or three years of use, the epoxy resin often generates serious ageing phenomenon, the mechanical strength becomes worse, the bonding strength is reduced, and the glue layer becomes hard and crisp and can be peeled or broken with slight force so that the reliability of the product is greatly reduced. The ageing-resistant epoxy resin curing agent overcomes the defects. Adhesive or pouring sealant prepared from the ageing-resistant epoxy resin curing agent and the epoxy resin has high bonding strength and predominant ageing resistance. By observation after four to five years of use, no cracking or breaking phenomenon is discovered, and various performance parameters are kept normal.

Description

A kind of ageing-resistant epoxy resin curing agent

One, technical field

The present invention relates to a kind of chemical composition, exactly is a kind of ageing-resistant epoxy resin curing agent.

Two, background technology

The T31,703 of domestic production at present, universal room temperature epoxy curing agents such as 593, though can satisfy user's basic demand, but after the Resins, epoxy after solidifying used through 1 year, often produce serious catabiosis, the physical strength variation, cohesive strength reduces, and the glue-line hardening becomes fragile, slightly firmly can cause and peel off or cracked, product reliability is greatly reduced.

Three, summary of the invention

The present invention is directed to the defective of existing epoxy curing agent, be intended to carry a kind of new epoxy curing agent, technical problem to be solved is to improve the ageing resistance of the Resins, epoxy after solidifying.

The ageing-resistant epoxy resin curing agent that the present invention is alleged, it is ageing-resistant to be meant that this solidifying agent adds behind the tackiness agent that forms behind the Resins, epoxy or the sealing glue solidifying, long service life.

This solidifying agent is by composite the forming of each raw material of following weight percent:

Phenol: 31%～35%, quadrol: 26%～30%,

Acetone: 13%～17%, propylene carbonate: 13%～17%,

Pimelinketone: 8%～12%.

Preferably:

Phenol: 33%, quadrol: 27%,

Acetone: 15%, propylene carbonate: 15%,

Pimelinketone: 10%.

Above-mentioned five kinds of raw materials are mixed in proportion stir, exothermic phenomenon is arranged therebetween, be chilled to room temperature naturally and be finished product.

This solidifying agent has used propylene carbonate, because propylene carbonate participated in curing reaction, finally forms highdensity polymer reticulated structure, thereby has improved toughness and the cohesive strength behind the epoxy resin cure, so can resist agingly, the life-time service performance is constant.In addition, this solidifying agent and Resins, epoxy in proportion after the impregnation room temperature long following set time, intensification can promote to solidify, and is specially about 25 ℃ of room temperatures promptly curablely through 24 hours, if in 80 ℃～100 ℃ heating cures, then gets final product completely solidified at two hours.This advantage is very easy to user's use.Resins, epoxy physical strength height after the curing, bonding force is strong, acid-alkali-corrosive-resisting, superior electrical property, especially ageing-resistant for up to 4 or five years, still can keep its physical strength and adhesive property.

This solidifying agent is applied widely, and such as epoxyn, the bonding and the repair efficiency that are used for various metals, pottery, duroplasts, glass, bamboo and wood products etc. are splendid; Resins, epoxy perfusion seal gum is used for that electron device, transmitter, electromagnetic clutch etc. are sealed, embedding; Anti-corrosive paint of epoxy resin, coal-tar pitch corrosion-resistant epoxy paint are used for the antiseptic project of oil, chemical industry equipment, pipeline.

Four, embodiment

1, the preparation of solidifying agent

Elder generation is with the phenol heat fused of proportional quantity, liquefied carbolic acid is added in the reactor, the pimelinketone, acetone and the propylene carbonate that add proportional quantity again, start is stirred, and adds quadrol successively, the a large amount of voluntarily heat releases of reactant, treat quadrol divide slowly add for several times finish after, temperature of charge rises to the highest, about about 100 degree, stop to stir, get final product discharging after reducing to room temperature naturally.The amber viscous liquid of outward appearance.

2, the preparation of sizing material

100 parts of extracting epoxy resins (weight part, down together), this solidifying agent 20-30 part, filler can be selected voluntarily, and as silicon powder, aluminum oxide powder, ferric oxide red powder, talcum powder, titanium dioxide etc., add-on can be made by oneself according to user's needs.General add-on is about 50%～150% of a Resins, epoxy add-on, can be not filled yet, and sizing material can select self-vulcanizing or heating cure all can.

Claims (2)

1. ageing-resistant epoxy resin curing agent, it is characterized in that: being used for each composite raw material has following weight percent:

Phenol: 31%～35%, quadrol: 26%～30%,

Acetone: 13%～17%, propylene carbonate: 13%～17%,

Pimelinketone: 8%～12%.

2. solidifying agent according to claim 1 is characterized in that:

Phenol: 33%, quadrol: 27%,

Acetone: 15%, propylene carbonate: 15%,

Pimelinketone: 10%.