UV powder mixed silica gel and preparation method and application thereof

A technology of mixing powder glue and light-curing monomer, which is applied in the direction of adhesives, etc., can solve the problems of high temperature yellowing resistance, poor weather resistance, low light transmittance, insufficient toughness, etc., achieve high refractive index, solve high energy consumption, The effect of improving toughness

Active Publication Date: 2016-05-25
SUMDA MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing UV adhesives currently on the market have defects such as high-temperature yellowing resistance, poor weather resistance, low light transmittance, and insufficient toughness, which cannot fully meet the requirements of LED packaging adhesives.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0056] Preparation of main body UV resin:

[0057] According to the formula shown in Table 1, add isocyanate, polymerization inhibitor and catalyst into the reaction vessel, add cyclohexanedimethanol, control the reaction temperature at 50°C, and the reaction time is 4h. The measured NCO% reaches the theoretical value of 4%-11 %, add hydroxypivalate hydroxypivalate, react at 60°C for 3 hours, measure NCO% and reach the theoretical value of 2%-8%, then add hydroxyethyl acrylate, react at 50°C for 3 hours, and detect After the NCO% is less than 1%, the material is discharged, and the main UV resin is obtained;

[0058] Table 1A1~A6, C1-C3 main UV resin (parts by weight)

[0059]

A1

A2

A3

A4

A5

A6

C1

C2

HDI

20

50

60

80

50

IPDI

40

70

40

BHT

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Organic Bismuth Cat...

Embodiment 1-5 and comparative example 1-2

[0066] Table 3 embodiment and each component composition of comparative example and performance result

[0067]

Example 1

Example 2

Example 3

Example 4

Example 5

Comparative example 1

Comparative example 2

Main body UV resin A1

30

Main body UV resin A2

35

Main body UV resin A3

40

Main body UV resin A4

45

Main body UV resin A5

50

Main body UV resin C1

35

Main body UV resin C2

40

Silicon modified photocurable monomer B1

40

Silicon modified photocurable monomer B2

35

30

...

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PUM

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Abstract

The invention discloses UV powder mixed silica gel and a preparation method and application thereof. The UV powder mixed silica gel comprises 30-50 parts of UV resin serving as a main body, 25-40 parts of silicon-modified photocuring monomer, 25-40 parts of photocuring monomer and 1-8 parts of photoinitiator. The UV powder mixed silica gel can be resistant to the high temperature of 280 degrees without yellowing, the high refractive index is achieved, furthermore, quite good toughness and air-tightness are achieved, and the problem that due to raising of the refractive index of traditional powder mixed silica gel, an adhesive layer is hardened, so that chalking occurs easily in the using process is effectively avoided; energy consumption is greatly lowered, the curing time is only 1 / 1800 that of the traditional powder mixed silica gel, the defects that the traditional powder mixed silica gel is high in energy consumption, long in curing time and the like are effectively overcome, and productivity is greatly improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a UV powder mixing glue and its preparation method and application. Background technique [0002] LED packaging glue is a kind of glue that covers the LED lamp bead. Its function is to protect the LED lamp bead. At present, the powder mixing glue for LED lamp bead packaging is basically two-component silica gel or two-component epoxy glue. Their curing conditions are generally baked in a high-power electric oven at 150°C for 5 hours, which consumes a lot of energy. At the same time, each batch of lamp beads needs to be baked for about 5 hours, and its efficiency is very low. In addition, the refractive index of the traditional powder-mixed silica gel is relatively low, and the increase of the refractive index usually causes the hardening of the adhesive layer, which makes it easy to pulverize during use. [0003] UV glue is mainly composed of base resin, active monomer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F299/06C09J153/00C08F220/28C08F220/18C08F220/06C08G18/32C08G18/67
CPCC08F220/18C08F220/28C08F299/06C08G18/3212C08G18/3221C08G18/672C09J153/00C08F220/06
Inventor 赵东理
Owner SUMDA MATERIAL TECH CO LTD
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