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Mass fixable by actinic radiation, and use of said mass

A technology of actinic radiation and radiation curing, used in non-polymer organic compound adhesives, adhesive heating methods for adhesives, coatings, etc. problem, to achieve the effect of good storage stability

Active Publication Date: 2020-09-18
DELO INDKLEBSTOFFE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the described compositions can be fixed by radiation in the presence of photoinitiators, they only have a short open time and cannot be formulated as storage-stable one-component compositions

Method used

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  • Mass fixable by actinic radiation, and use of said mass
  • Mass fixable by actinic radiation, and use of said mass
  • Mass fixable by actinic radiation, and use of said mass

Examples

Experimental program
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Effect test

manufacture example

[0150] To produce the curable composition according to the invention, the isocyanate-reactive component is first mixed with the passivating agent. The micronized solid isocyanate is then added and the mixture is thoroughly mixed by means of a vacuum kneader. Then other isocyanate-reactive components, radiation-curing components, photoinitiators and all other additives (E), such as catalysts, stabilizers or thixotropes, are added while excluding light with a wavelength of less than 500 nm. Solid additives can also be introduced into the liquid formulation components as pre-solutions or suspensions.

[0151] The overall composition was thoroughly mixed with a vacuum kneader and filled into opaque cartridges.

[0152] To manufacture the curable composition according to the comparative example, a similar method was used.

[0153] Table 1 below lists the components used to make the curable compositions:

[0154] Table 1: Components of the curable composition

[0155]

[0156...

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PUM

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Abstract

The invention relates to a storage-stable isocyanate-based one-component mass that can be fixed by irradiation with actinic radiation and which can be cured by heat. The mass comprises (A) an at leastdifunctional, solid isocyanate with a passivated surface and with a melting point of at least 40 DEG C; (B) an isocyanate-reactive component, which is selected from the group of alcohols, amines andthiols and mixtures thereof; (C) a radiation-curable compound; and (D) a photoinitiator. Further additives (E) can be contained optionally in the mass according to the invention. By being fixed with actinic radiation, the masses can be converted into a state that ensures the dimensional stability of the masses during the thermal curing.

Description

technical field [0001] The invention relates to storage-stable, actinic radiation-fixable and thermally curable isocyanate-based one-component compositions. [0002] In addition, the present invention relates to a method of bonding, coating and casting substrates using said composition. Background technique [0003] In electronics, the trend towards ever-increasing miniaturization of individual components means that bonding, casting and coating must be carried out with great precision. In addition, adhesives for electronic applications must meet many other requirements. For example, in the field of microelectromechanical systems (MEMS), there is a need for highly flexible compositions even at low temperatures as low as -40°C. This is the only way that the required mechanical decoupling of the MEMS part from the substrate can be successfully achieved through the adhesive. Without adequate decoupling, satisfactory signal quality cannot be achieved, which is particularly det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/50C08G18/48C08G18/62C08G18/69C08G18/79C08G18/80
CPCC08G18/5024C08G18/6204C08G18/69C08G18/798C08G18/8006C08G18/4812C08G18/242C08G18/5027C09D4/00C09J4/00C09J5/06C09J2475/00
Inventor 马库斯·埃雷特安德亚斯·亨舍尔
Owner DELO INDKLEBSTOFFE
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