CN105295804A - Sealant composition used for bonding narrow bezel display equipment - Google Patents

Abstract

The invention discloses a sealant composition used for bonding narrow bezel display equipment. The sealant composition is provided with relatively high bonding strength via combination of different types of curing agents, and can be used for bonding narrow bezel or borderless display equipment.

Description

A kind of encapsulant composition for bonding narrow frame display equipment

Technical field

The present invention relates to a kind of high viscosity sealant composition, particularly a kind of encapsulant composition for bonding narrow frame display equipment, preferred one is applicable to the display element high viscosity sealant compositions such as bonding liquid crystal.

Background technology

Solidifying agent has another name called stiffening agent, ripening agent or set agent, is that a class is promoted or controls material or the mixture of curing reaction.Resin solidification is through the chemical reactions such as condensation, closed loop, addition or catalysis, makes thermosetting resin that irreversible change procedure occur, and solidification has come by adding solidification (being cross-linked) agent.Solidifying agent is absolutely necessary additive, is to make caking agent, coating, mould material all to need to add solidifying agent, otherwise epoxy resin can not solidify.

In recent years, increase, the frame of the display part of adjoint liquid-crystal display are more and more narrow, and the graph thinning of sealing agent is advanced.In addition, as the adhering object of sealing agent, glass is not only by adhering object, also comprising inorganic materials, the alignment films etc. such as ITO electrode, SiN film organic materials etc. also becomes by adhering object, adherend becomes variation, the cementability variation requiring sealing agent to have foreign material can be bonded to each other.

This area faces main, is the requirement of various mobile phone and TV, indicating meter etc. and Rimless narrow to frame, and because its frame is more and more less, the fixing of display element device has just become a difficult problem.For the bonding way that this area is the most frequently used, more and more higher requirement is proposed to bonding strength.

But existing solidifying agent, most cohesive strength is inadequate, or can provide close cohesive strength, but cost is high, loses market-oriented meaning.

Summary of the invention

The object of the invention is to propose a kind of encapsulant composition for bonding narrow frame display equipment, it is composite by dissimilar solidifying agent, the higher viscosity met the demands is provided, makes it can bonding narrow frame even Rimless equipment, such as mobile phone, indicating meter, TV.

For reaching this object, the present invention by the following technical solutions:

For an encapsulant composition for bonding narrow frame display equipment, it comprises following component:

(1) methacrylic acidylate epoxy resin 100 mass parts;

(2) spherical silicon dioxide 10-20 mass parts;

(3) organic filler 10-20 mass parts;

(4) optical free radical initiator 2-5 mass parts;

(5) silane coupling agent 1-3 mass parts

(6) curing agent composition 1-5 mass parts, described curing agent composition comprises:

The mass ratio of two kinds of components described in described curing agent composition is 3:1-1:3, and preferred 2:1-1:2, has preferred 2:1 further.

Embodiment

The present invention is described a kind of composition for bonding narrow frame display equipment of the present invention by following embodiment.

Embodiment 1

I. the synthesis of formula 1 compound

Described in formula 1, compound is known compound, and those skilled in the art can obtain in commercially available purchase, also can synthesize and prepare.Its typical but non-limiting synthesis example is as follows:

Prepare in Virahol 100g, dissolve the lysate A of two (isocyanatomethyl) hexanaphthene 19.42g of 1,3-and in Virahol 100g, dissolve the lysate B of hydrazine 25.3g.In there-necked flask, lysate B is controlled at 30 DEG C while stir, drip lysate A with the speed of 1.4g/ minute simultaneously.After the dropping of lysate A terminates, utilize Fourier Tranform infrared spectrophotometer assaying reaction liquid, confirm the 2250cm from isocyanate group ^-1termination reaction after neighbouring peak disappears.Reaction is there occurs according to the mode relative to two (isocyanatomethyl) hexanaphthene 1 mole of 1,3-, hydrazine being 5 moles (taking molar ratio computing as 1:5).

After reaction terminating, use filter paper to filter, carry out de-liquid, clean obtained leaching thing with Virahol 50ml, filter further, with the leaching thing that 50 DEG C of dryings obtain in vacuum drying oven, produce the compound of formula 1.

II. the synthesis of formula 2 compound

Described compound is known compound, and those skilled in the art can obtain in commercially available purchase, also can synthesize and prepare.Its typical but non-limiting synthesis example is as follows:

In reaction vessel, add 1.6mol dimethyladamantane and 1mol maleic anhydride, and the temperature in reaction vessel is remained on 160 DEG C.In this reaction vessel, dripped with 3 hours the solution being dissolved in a small amount of dimethyladamantane as the ditertiary butyl peroxide 5.5mmol of free radical generating agent, react.From dropping end, terminate reaction through 3 hours, obtain reaction product.By underpressure distillation gained reaction product, be the compound of formula 1.Or its preparation method is as follows:

In reaction vessel, add 1.6mol ethyl diamantane and 1mol maleic anhydride, and the temperature in reaction vessel is remained on 160 DEG C.In this reaction vessel, dripped with 3 hours the solution being dissolved in a small amount of ethyl diamantane as the ditertiary butyl peroxide 5.5mmol of free radical generating agent, react.From dropping end, terminate reaction through 3 hours, obtain reaction product.By underpressure distillation gained reaction product, obtain corresponding target compound.

By the component I for preparing and II, obtain described a kind of curing agent composition for bonding narrow frame display equipment according to 2:1 is composite.

Preparation methacrylic acidylate epoxy resin 100 mass parts, spherical silicon dioxide 15 mass parts as inorganic filler, the F-351 as organic filler (Japanese Zeon society manufactures) 15 mass parts, Irgacure907 (BASF manufacture) 3 mass parts as optical free radical initiator, (manufacture of chemical industry society of SHIN-ETSU HANTOTAI) 2 mass parts of the KBM-403 as silane coupling agent and curing agent composition of the present invention 2 mass parts are carried out dispersed, obtain the encapsulant composition for bonding narrow frame display equipment.

Prepare the square ito glass of thickness 0.5mm, 3.0cm and the square glass of thickness 0.5mm, 2.3cm.In the Central Line of ito glass apart from two ends be 9mm position according to diameter be 1.5 ~ 2.0mm, thickness is that the mode of 6.0 ~ 10.0 μm is coated with above-mentioned liquid crystal sealing agent composition as bonding plane, is alignd in 1 limit of glass square with 2.3cm for ito glass square for 3.0cm and both are fitted, thus produce test film.After UV3000mJ is irradiated to the test film 10 of laminating, heat 60 minutes at 120 DEG C, liquid crystal sealing agent composition is solidified.(society of Shimadzu Seisakusho Ltd. manufactures to utilize Autograph; AGS) to solidification after test film ito glass Central Line on apart from end be that 5mm point carries out punching press, mensuration bonding strength.Its cohesive strength is 28.6N/mm.

Comparative example 1

Only containing component I, not containing component I I, all the other conditions are constant, and its cohesive strength is 14.1N/mm.

Comparative example 2

Only containing component I I, not containing component I, all the other conditions are constant, and its cohesive strength is 15.5N/mm.

Above-described embodiment and comparative example explanation, encapsulant composition of the present invention, composite by two kinds of dissimilar solidifying agent, under same amount prerequisite, its cohesive strength will be better than far away being used alone of two kinds of components, proves to create synergistic effect between two kinds of solidifying agent that the present invention adopts.

Applicant states, the present invention illustrates curing agent composition of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned special formulation, does not namely mean that the present invention must rely on above-mentioned detailed component and formula could be implemented.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of ancillary component, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.

Claims (2)

1., for an encapsulant composition for bonding narrow frame display equipment, it comprises following component:

(1) methacrylic acidylate epoxy resin 100 mass parts;

(2) spherical silicon dioxide 10-20 mass parts;

(3) organic filler 10-20 mass parts;

(4) optical free radical initiator 2-5 mass parts;

(5) silane coupling agent 1-3 mass parts

(6) curing agent composition 1-5 mass parts, described curing agent composition comprises:

The mass ratio of two kinds of components described in described curing agent composition is 3:1-1:3.

2., as claimed in claim 1 for the composition of bonding narrow frame display equipment, it is characterized in that, the mass ratio of two kinds of components described in described curing agent composition is 2:1-1:2, preferred 2:1.