Ultraviolet ray-curable silicone adhesive agent composition, and method for producing laminate

Abstract

An ultraviolet ray-curable silicone adhesive agent composition comprising (A) a polysiloxane represented by formula (1): (R1SiO3 / 2)a1(R1 3SiO1 / 2)b1(X1O1 / 2)c1 (wherein R1 represents a monovalent hydrocarbon group, and a methyl group accounts for 20 mol% or more and an alkenyl group accounts for 0.1 to 50 mol%; X1 represents a hydrogen atom or the like; a1 represents 0.1 to 1; b1 represents 0 to 0.75; and c1 represents 0 to 0.1; and the requirement represented by the formula: a1+b1+c1 = 1 is satisfied), (B) a polysiloxane represented by formula (2): (R2 3SiO1 / 2)a2(R2 2SiO)b2 (wherein R2 represents a monovalent hydrocarbon group, a methyl group accounts for 20 mol% or more and an alkenyl group accounts for 0.01 to 25 mol%; a2 represents 0.001 to 0.67; b2 represents 0.33 to 0.999; and the requirement represented by the formula: a2+b2 = 1 is satisfied), (C) a hydrogen polysiloxane represented by formula (3): R3 dHeSiO[(4-d-e) / 2] (wherein R3 represents a monovalent hydrocarbon group; and d and e represent numerical values satisfying the requirements represented by the formulae: 0.7 <= d <= 2.5, 0.01 <= e <= 1.0 and 0.8 <= d+e <= 2.7) and (D) a platinum-group catalyst capable of being activated with light having a wavelength of 200 to 500 nm. The ultraviolet ray-curable silicone adhesive agent composition can provide a cured article having excellent adhesion force to an object of interest even when being cured under room temperature.

Description

technical field [0001] The present invention relates to an ultraviolet curable silicone adhesive composition and a method for producing a laminate. Background technique [0002] The ultraviolet addition-curable silicone adhesive is a silicone material characterized in that it slowly cures and adheres to a member by irradiation of ultraviolet rays even at room temperature. This is because the photoactive platinum catalyst contained in the material changes to a highly active state with respect to the crosslinking reaction when irradiated with ultraviolet rays. At this time, the platinum catalyst maintains a highly active state only by receiving ultraviolet radiation once, and solidification of the liquid material progresses. Therefore, this material system is particularly effective when it is desired to bond opaque members that do not transmit light. [0003] As a simple step in laminating members using an ultraviolet addition-curable silicone adhesive and bonding them, the ...

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Problems solved by technology

[0004] However, conventional ultraviolet addition-curable silicone adhesives cannot achieve sufficient adhesion to substrates, especially when they are cured at room temperature.

[0005] In this respect, it is reported in Patent Document 1 that the adhesion of PBT (polybutylene terephthalate) and PA (polyamide) can be improved by compounding a large amount of hydrosilane in the silicone adhesive. However, if the hydrosilyl group is excessively present in the addition-curable silicone material, a dehydrogenation reaction is likely to occur as a side reaction to the cross-linking reaction using a platinum catalyst, and as a result, bubbles are generated in the resin , which becomes the breaking point, which significantly reduces the strength of the resin and becomes the cause of the reduction of the adhesive force

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