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Curable composition

A composition and curing technology, applied in the field of curing compositions, can solve problems such as poor operability, slow curing speed of cured products, and low adhesion

Inactive Publication Date: 2007-09-05
TORAY FINE CHEMICALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when curing with metal oxides, especially when curing with manganese dioxide, although the obtained cured product has a fast curing speed and excellent workability, in the case of an extremely long-time accelerated exposure test of about 3000 hours, there are Problems such as low adhesion
In addition, in the case of long-term immersion in high-temperature hot water at around 80°C, the original size can be restored by drying, but there are problems such as swelling caused by water-soluble substances contained in manganese dioxide.
On the other hand, when organic peroxides are used, the resulting cured product has problems such as slow curing speed and poor workability.
In addition, although the obtained cured product can obtain sufficient bonding strength by selecting an appropriate bonding agent, it is sometimes difficult to bond with various materials such as glass, metal, thermoplastic resin, and plaster. to full bond strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] In a polysulfide polymer (manufactured by Toray Fine Chemicals Co., Ltd., "Chiocol LP-23", viscosity at 25°C: 12 Pa·s), a plasticizer and a filler were blended in the proportions in Table 1, and passed Mix with a mixer to obtain the main ingredient.

[0122] Element

[0123] In 300 parts by weight of the main agent, as a redox system reaction initiator, 1.0 parts of copper (trade name: copper (powder) 200 mesh: Junsei Chemical Co., Ltd. )) (the addition of copper is 0.02 parts). As a curing agent, 9.0 parts of organic peroxide cumene hydroperoxide (trade name: Percumil H-80, manufactured by NOF) was added and mixed to obtain a curable composition. Hardness measurement was performed using the obtained curable composition. The results are shown in Table 2.

Embodiment 2

[0125] In addition to adding 1.0 parts of copper acetylacetonate (trade name: copper (II) acetylacetonate, Junsei Chemical Co., Ltd.) as a 2 wt.% ethanol solution of metals and metal compounds as a redox system reaction initiator, the rest The same operation as in Example 1 was carried out to obtain a curable composition (the addition of copper (II) acetylacetonate was 0.02 parts). Hardness measurement was performed using the obtained curable composition. The results are shown in Table 2.

Embodiment 3

[0127] In addition to adding 1.0 parts of copper (I) chloride (trade name: copper (I) chloride, Junsei Chemical Co., Ltd.) as a 2 wt.% ethanol solution of metals and metal compounds as a redox system reaction initiator, All the other operations were performed in the same manner as in Example 1 to obtain a curable composition (the addition of copper chloride (I) was 0.02 parts). Hardness measurement was performed using the obtained curable composition. The results are shown in Table 2.

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Abstract

A curable composition which comprises 100 parts by weight of a polysulfide polymer exhibiting a viscosity of 0.5 to 50Pas at 25 C, 1 to 20 parts by weight of an organic peroxide, and 0.0005 to 10 parts by weight of a redox initiator containing at least one metal selected from among copper, iron, lead, potassium, manganese, indium, nickel and cobalt. The curable composition has excellent curing characteristics and products of curing of the composition are so excellent in water resistance as not to cause swelling or strength reduction even when immersed in warm water for a long period. The composition is favorably usable as the sealant for double-glazing units, aircrafts, civil engineering works or constructions.

Description

technical field [0001] The present invention relates to a curable composition suitable for use as a sealing material for multiple glazing, aircraft, and civil engineering. Background technique [0002] Polysulfide polymers are readily oxidized by oxidizing agents and cure at room temperature. Since the polysulfide polymer contains sulfur in the main chain of the molecule and does not contain double bonds, the rubber-like cured product obtained by curing the polysulfide polymer is excellent in oil resistance, weather resistance, water tightness, and air tightness, and Good adhesion. Since the rubber-like cured product obtained by curing polysulfide polymers has excellent oil resistance, weather resistance, water tightness, air tightness, and adhesiveness, it is widely used as sealing materials, adhesives, and coatings. [0003] There is known a curable composition in which a metal dialkyldithiocarbamate is added to a polysulfide polymer, and a metal oxide or an organic pero...

Claims

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Application Information

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IPC IPC(8): C08L81/04C08K3/10C08K5/14
Inventor 加藤秀利松本和则广濑彻
Owner TORAY FINE CHEMICALS CO LTD
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