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One-part type heat curable composition

A composition, thermal curing technology, applied in the direction of adhesive types, other chemical processes, chemical instruments and methods, etc., to achieve the effect of increasing adhesion and excellent bonding properties

Inactive Publication Date: 2009-04-22
SIKA TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But during combustion, PVC leads to the production of dioxins and similar substances

Method used

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  • One-part type heat curable composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] 24.4 parts of isocyanate groups derived from isophorone diisocyanate (IPDI) at both terminal positions obtained by the reaction between polypropylene glycol and excess IPDI were placed in a batch-type twin-shaft kneader at room temperature and a prepolymer of urethane bonds, and 13.0 parts of a thixotropic agent (polyurea compound). In addition, 32.2 parts of heavy calcium carbonate (NS-2100, manufactured by Nitto Funka Kogyo Co., Ltd.), 0.4 parts of titanium oxide (TCR-10, manufactured by Sakai Chemical Industry Co., Ltd.), 0.1 part of moisture potential Hardener (ALD-1, manufactured by Mitsui Takeda Chemicals Inc.), 1.5 parts of amine adduct type latent hardener (Adeka Hardener EH 4070S, manufactured by Asahi Denka Corporation), and 1.5 parts of solvent (xylene). The mixture is then stirred and kneaded under vacuum and then defoamed. Thus a one-part type heat curable composition was prepared.

Embodiment 2

[0062] A one-part type heat-curable urethane-based composition was obtained in the same manner as described in Example 1, except that the mixing amount of the amine adduct type latent hardener was 0.5 part.

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Abstract

Provided is a one-part type heat curable composition which exhibits superior adhesion properties, which is easily cured by heating, does not soften even if the composition is baked at increased temperature, is completely cured by means of moisture in the atmosphere even if curing is not sufficient due to heating temperature, heating period, and the like, and exhibits increased adhesiveness with respect to a coating film after the composition is cured. A one-part type heat curable composition comprising: (A) a prepolymer having a urethane bond(s), and an isocyanate group (s) at a chain end or pendent position (s) thereof; (B) an amine-adduct type latent hardener; and (C) a moisture latent hardener.

Description

technical field [0001] The present invention relates to a one-part type heat-curable composition which is easily cured by heating, exhibits excellent adhesive properties, does not soften during baking at elevated temperatures, and can pass through the atmosphere even if curing is insufficient Moisture in fully cures and can be easily applied. Background technique [0002] When press-molded steel pans are assembled by partial welding, such as spot welding, in the production line of automobiles, refrigerators, and the like, heat-curing sealing products are generally used in order to maintain sealing properties and watertight properties by sealing joint parts or empty parts. Structures assembled by partial welding, such as spot welding, are subjected to a galvanic coating to prevent rust, and then a heat-curable product is applied to the particular portion. Then, if necessary, an inner coat, intermediate coat and final coat of paint are baked on top of it for aesthetic purpose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10C08G18/10C09J175/04
CPCC08G18/752C08G18/10C09K3/1021C09J175/04C08G18/4845C08G18/3225
Inventor T·佐崎A·杉山
Owner SIKA TECH AG
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