Full-spectrum LED lamp packaging adhesive
A technology for LED lamps and encapsulation adhesives, applied in the direction of adhesives, etc., can solve the problems of easy cracking, poor toughness, and increased hardness of encapsulation adhesives, and achieve the effects of low impurity content, high adhesion, and high thermal stability.
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Embodiment 1
[0030] A method for preparing an encapsulant for a full-spectrum LED lamp, comprising the following steps:
[0031] (1) Preparation of Compound A: React hydrosilane and epoxyhexylethylene under the action of a Pt catalyst to obtain it; the reaction temperature is 75° C., and the reaction time is 2 hours.
[0032] (2) Preparation of encapsulant: mix compound A, compound B, compound C, and compound D evenly, add distilled water and barium hydroxide monohydrate catalyst as reactants, heat to 75°C, and perform hydrolysis and condensation reaction for 3 hours under stirring conditions, The mass ratio of the reactant and distilled water is 1:1; after the reaction, pressurize and filter to obtain the product.
[0033] The number average molecular weight was 1120, the weight average molecular weight was 1690, and the molecular weight distribution index was 1.468.
[0034] Test its performance: the light transmittance is 93%, the refractive index at 25°C is 1.732, the thermogravimetri...
Embodiment 2
[0036] A method for preparing an encapsulant for a full-spectrum LED lamp, comprising the following steps:
[0037] (1) Preparation of Compound A: React hydrosilane and epoxyhexylethylene under the action of a Pt catalyst to obtain it; the reaction temperature is 60° C., and the reaction time is 3 hours.
[0038] (2) Preparation of encapsulant: mix compound A, compound B, compound C, and compound D evenly, add distilled water and barium hydroxide monohydrate catalyst as reactants, heat to 60°C, and perform hydrolysis and condensation reaction for 4 hours under agitation. The mass ratio of the reactant and distilled water is 1:2; after the reaction, pressurize and filter to obtain the product.
[0039] The number average molecular weight was 1140, the weight average molecular weight was 1680, and the molecular weight distribution index was 1.482.
[0040] Test its performance: the light transmittance is 92%, the refractive index at 25°C is 1.692, the thermogravimetric analysis...
Embodiment 3
[0042] A method for preparing an encapsulant for a full-spectrum LED lamp, comprising the following steps:
[0043] (1) Preparation of Compound A: React hydrosilane and epoxyhexylethylene under the action of a Pt catalyst to obtain it; the reaction temperature is 90° C., and the reaction time is 1 h.
[0044] (2) Preparation of encapsulant: mix compound A, compound B, compound C, and compound D evenly, add distilled water and barium hydroxide monohydrate catalyst as reactants, heat to 90°C, and perform hydrolysis and condensation reaction under stirring conditions for 2 hours, The mass ratio of the reactants to distilled water is 3:2; after the reaction, pressurize and filter to obtain the product.
[0045] The number average molecular weight was 1150, the weight average molecular weight was 1710, and the molecular weight distribution index was 1.501.
[0046] Test its performance: the light transmittance is 92%, and the refractive index at 25°C is 1.687. The thermogravimetri...
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