CN1049370A

CN1049370A - The preparation method of ultraviolet light solid adhesives with liquid crystal sealling

Info

Publication number: CN1049370A
Application number: CN 89105556
Authority: CN
Inventors: 严广周
Original assignee: SHENZHEN TIANMA MICROELECTRONICS CO
Current assignee: SHENZHEN TIANMA MICROELECTRONICS CO
Priority date: 1989-08-10
Filing date: 1989-08-10
Publication date: 1991-02-20

Abstract

The preparation method of a kind of sealing liquid crystal and the light-initiated cured binders of glassy bond free radical, adopt main gel, solidifying agent, other auxiliary agents of coupling attenuant are prepared by a certain percentage and are made, it is characterized in that adopting acrylic acid Resins, epoxy is main gel, under UV-irradiation, light trigger decomposes the generation radical makes its polymerizing curable, make it to be transformed into reticulated structure and to make by linear structure, because of in the present invention's prescription, having adopted the synthetics of coupling thinner and reactive thinner, make the binding agent of making have high boiling point, not volatile, no waste liquid, exhaust gas emission, processing ease, equipment is simple, the economic benefit advantages of higher.

Description

The preparation method of ultraviolet light solid adhesives with liquid crystal sealling

The present invention relates to a kind of preparation method of binding agent, especially for the preparation method of the ultraviolet light solid adhesives with liquid crystal sealling of sealing liquid crystal and glassy bond.

At present, what domestic use was more is the Resins, epoxy sealing compound that adopts the ionic polymerization curing, this binding agent easily causes and seals pollution, and set time, length (needed 24 hours under the room temperature, need about 4 hours and when temperature is 80 ℃, solidify), and the streamline operration that is unrealized, therefore preparation is very uneconomic.External aspect optic-solidified adhesive, have to mention with aromatic series salt among some reports, the patent JP 60-217231 (A) as Japanese Su Da company make photosensitizers polymerizing curable J diene Resins, epoxy as the liquid crystal cell sealing agent; What the patent JP56-53169 (A) of Japan Ricoh (RICHO) company was mentioned in addition produces radical light trigger polymerizing curable nylon epoxy resin as the LCD panel sealing agent with ultraviolet lighting; Also have United States Patent (USP) U, S, P, the O4717605 of West German's application to disclose with ionic and radical light trigger polymerizing curable Resins, epoxy and unsaturated vinyl monomer as light glass elements binding agent and introduced the part curing technology of UV-irradiation, but above-mentioned patent does not all relate to the light-initiated curing of acrylic acid epoxy resin free radical, and the coupling thinner makes as the method for reactive thinner and is used for sealing liquid crystal glue.

The object of the present invention is to provide a kind of method for preparing novel binders, overcome in the existing technology and singly on curing process, can not realize the not enough shortcoming of streamline operration with epoxy resin glue, and the problem of the ionic soil liquid crystal that is brought with the ionic light initiator.

For the purpose that solves the present invention is taked following process technology scheme: adopt main gel, solidifying agent, coupling thinner, catalyzer, stablizer, light trigger and other auxiliary agents preparation raw material as binding agent, wherein main gel employing tetraglycidel ether epoxy resin and vinylformic acid are pressed 1: 0.9～1.5 equivalence ratio, under 110 ℃～195 ℃ temperature reaction vessel internal reaction 2～6 hours, add catalyzer, stablizer generates a synthetics; The coupling thinner that adopts is the synthetics of coupling agent and thinner, its equivalence ratio is 1: 1～2, react 1～1.5 hour adding catalyzer identical down 80～180 ℃ of temperature with main gel, order by main gel, coupling thinner, stablizer, light trigger, auxiliary agent is added in the reaction vessel then, stir while adding, under 50 ℃～90 ℃ temperature condition, react, up to being chilled to room temperature, even during use at normal temperatures the 2 minutes liquid crystal cells of ultraviolet lighting with 400 watts seal.

Now be described in further detail embodiments of the invention:

Embodiment one: the prescription of preparation ultraviolet light solid adhesives with liquid crystal sealling is by weight percentage: acrylic acid epoxy resin accounts for 70～85%, methacrylic acid r-glycidoxypropyltrime,hoxysilane ester accounts for 7～15%, rest in peace and accuse that ether accounts for 0.5～5%, triethylamine accounts for 1%, phthalic acid two J esters account for 5%, 400 watts of UV-irradiation were finished curing in 2 minutes then, and encapsulated liquid crystals element water boiling resistance is more than 24 hours;

Embodiment two: for improving softening agent and curing agent content, the basic recipe of binding agent (by weight percentage) is: acrylic acid epoxy resin accounts for 68～76%, methacrylic acid 2-hydroxyl-3-benzyloxy propyl diester accounts for 10～18%, the announcement ether of resting in peace accounts for 6～10%, and triethylamine accounts for 0.8%, and asccharin accounts for 0.5%, diethyl phthalate accounts for 2%, liquid polysulfide rubber accounts for 3%, finishes curing in 2 minutes with 4000 watts of UV-irradiation then, and encapsulated liquid crystals element water boiling resistance is more than 24 hours.

Embodiment three: adopt following prescription: acrylic acid epoxy resin accounts for 72～80%, methacrylic acid 3-J oxygen base-2-hydroxy-propyl ester 8～13%, hexahydropyridine 1～2%, benzophenone accounts for 7%, phthalic acid two J esters account for 4%, biphenol is accounted for 0.3%, finished curing in 2 minutes at 400 watts of ultraviolet lightings then.

Adopt preparation method of the present invention to overcome the pollution of ionic cured binders to liquid crystal, and not only solidification effect is good because employing coupling diluent is prepared, also has the boiling point height, volatility is little, the advantages such as tough fragility is better, good in economic efficiency, its price is 1/3 of imported product price.

Claims

1, a kind of preparation method of ultraviolet light solid adhesives with liquid crystal sealling.Adopt main gel, solidifying agent, thinner and auxiliary agent formulated by a certain percentage, it is characterized in that: main gel wherein adopts tetraglycidel ether epoxy resin and (methyl) vinylformic acid to press 1: 0.9～1.5 equivalence ratios, synthesizes in 2～6 hours at the container internal reaction under 110 ℃～195 ℃ temperature; The coupling thinner adopts coupling agent and thinner by 1: 1～2 equivalence ratios, under 80～180 ℃ of temperature, place the container internal reaction to synthesize in 1～5 hour, order by main gel, coupling thinner, stablizer, light trigger, auxiliary agent joins in the container, stir while adding, under 50 ℃～90 ℃ temperature condition, carry out, even be chilled to room temperature then, seal with 2 minutes liquid crystal cells of 400 watts of ultraviolet lightings at normal temperatures when using;

2, method as claimed in claim 1, the prescription that it is characterized in that binding agent is (by weight percentage): acrylic acid epoxy resin accounts for 70～85%, methacrylic acid r-glycidoxypropyltrime,hoxysilane ester accounts for 7～15%, the announcement ether of resting in peace accounts for 0.5～5%, triethylamine accounts for 1%, and dibutyl phthalate accounts for 5%;

3, method as claimed in claim 1, the prescription that it is characterized in that binding agent is (by weight percentage): acrylic acid epoxy resin 68%～76%, methacrylic acid 2-hydroxyl-3-benzyloxy propyl diester accounts for 10%～18%, rest in peace and accuse that ether accounts for 6%～10%, triethylamine accounts for 0.8%, asccharin accounts for 0.5%, diethyl phthalate accounts for 2%, and liquid polysulfide rubber accounts for 3%;

4, method as claimed in claim 1, the prescription that it is characterized in that binding agent is (by weight percentage): acrylic acid epoxy resin accounts for 70～80%, methacrylic acid 3-J oxygen base-2-hydroxy-propyl ester accounts for 6～13%, hexahydropyridine 1～2%, benzophenone accounts for 7%, phthalic acid two J esters account for 4%, and biphenol is accounted for 0.3%.