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One-part moisture-curable polyurethane composition

A moisture-curable, polyurethane technology, used in polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve problems such as poor shear elastic modulus and physical properties, and achieve high shear elastic modulus, Good storage stability and excellent adhesion

Active Publication Date: 2016-02-03
SIKA HAMATITE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, the following problems have been found. The conventionally known one-component moisture-curable polyurethane compositions described in Patent Documents 1 to 4 etc. are based on compounds other than urethane prepolymers and fillers (for example, the isocyanate of Patent Document 1). silane compounds, etc.), the type and content of shear elastic modulus, adhesive properties under high temperature and high humidity, and storage stability may be poor in one or more physical properties

Method used

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  • One-part moisture-curable polyurethane composition
  • One-part moisture-curable polyurethane composition
  • One-part moisture-curable polyurethane composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～18、 comparative example 1～18

[0121] Each component shown in Table 1 below was mixed with a mixer in the composition (parts by mass) shown in Table 1 to obtain each polyurethane composition shown in Table 1.

[0122]

[0123] Each prepared polyurethane composition is coated on a steel plate (width: 25mm, length: 70mm) to a thickness of 5mm, a width of 25mm, and a length of 8mm. test piece.

[0124] The prepared test body was stretched for 1 mm at a speed of 10 mm / min, and the maximum slope of the SS curve at this time was taken as the shear modulus of elasticity. The results are shown in Table 1 below.

[0125] In addition, if the value of the elastic modulus is 10.0 MPa or more, it can be evaluated that the shear elastic modulus is high.

[0126]

[0127] The beads of each polyurethane composition prepared It was applied on a coated body (glass coated with a primer (MS-90, manufactured by Yokohama Rubber Co., Ltd.)), pressed to a thickness of 3 mm, and cured to prepare a test piece. In addition, ...

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Abstract

The purpose of the present invention is to provide a one-part moisture-curable polyurethane composition which has a high shear modulus, exhibits excellent adhesion under high-temperature high-humidity environments, and has good storage stability. The one-part moisture-curable polyurethane composition according to the present invention comprises a urethane prepolymer (A), a cross-linking agent (B), carbon black (C) and a catalyst (D), wherein the cross-linking agent (B) is at least one substance selected from the group consisting of (b1) hexamethylene diisocyanate isocyanurate, (b2) hexamethylene diisocyanate allophanate, (b3) a reaction product of hexamethylene diisocyanate with trimethylolpropane and (b4) a reaction product of hexamethylene diisocyanate with glycerin, and the content of the cross-linking agent (B) is 8 to 20 parts by mass relative to 100 parts by mass of the urethane prepolymer (A).

Description

technical field [0001] The present invention relates to a one-component moisture-curable polyurethane composition. Background technique [0002] Conventionally, various urethane resin compositions have been widely used as sealants, adhesives, and the like. [0003] As such a urethane resin composition, a two-component composition composed of a polyol compound and an isocyanate compound, and a one-component composition cured by moisture in the air are known, but in recent years , The use of one-component moisture-curable polyurethane compositions is expanding due to the fact that it does not require mixing and adjustment of the composition during on-site construction and is easy to handle. [0004] For example, Patent Document 1 describes "a one-component moisture-curable polyurethane composition containing an isocyanate silane compound obtained by reacting trimethylolpropane with a diisocyanate compound and a urethane prepolymer having at least A reaction product of a comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/79C08K3/04C08L75/04
CPCC08K5/34924C08G18/4812C08G2190/00C08K3/04C08K5/053C08K5/29C09J175/06C08G18/12C08G18/307C08G18/792C08G18/7831C08G18/8025C08L75/04
Inventor 荒木公范池田显雄
Owner SIKA HAMATITE CO LTD