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1 part moisture curing polyurethane composition

A moisture-curing polyurethane technology, applied in polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve the problems of poor shear elastic modulus and physical properties, and achieve high shear elastic modulus, Excellent adhesiveness and good storage stability

Active Publication Date: 2018-11-13
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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  • 1 part moisture curing polyurethane composition
  • 1 part moisture curing polyurethane composition
  • 1 part moisture curing 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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PUM

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Abstract

A one-part moisture-curable polyurethane composition according to the present technology comprises: a urethane prepolymer (A), a crosslinking agent (B), carbon black (C) and a catalyst (D). The crosslinking agent (B) is at least one type selected from the group consisting of isocyanurate of hexamethylene diisocyanate (b1), allophanate of hexamethylene diisocyanate (b2), a reaction product of hexamethylene diisocyanate with trimethylolpropane (b3), and a reaction product of hexamethylene diisocyanate with glycerin (b4). The content of the crosslinking agent (B) is from 8 to 20 parts by mass per 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 Patents(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