Organic silicon pouring sealant for LED (Light Emitting Diode) flexible lamp bar and preparation method thereof

A technology of silicone potting glue and LED flexible light strip, which is applied in the direction of dyed silicone compound treatment, adhesives, adhesive additives, etc., can solve the problems of decreased reliability of electronic devices, affecting light transmittance, affecting luminous flux, etc., to achieve Reduce the influence of luminous flux, good light transmittance, and ensure high light efficiency

Active Publication Date: 2016-01-20
HANGZHOU FIRST APPLIED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Patent CN103756625A describes a new type of condensation-type silicone potting glue for LED flexible light strips, which uses organic tin as a catalyst, but the condensation-type potting glue will release small molecules during the curing process, on the one hand, it is easy to produce bubbles and mist. The light transmittance, and the light emitted by the lamp beads will produce birefringence due to air bubbles, which will affect the luminous flux; on the other hand, the condensation type potting compound will produce relatively large shrinkage during the curing process, causing internal stress to the lamp beads in the light bar , leading to a decrease in the reliability of electronic devices using

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of the base rubber: Add 5 parts of white carbon black to 100 parts of vinyl silicone oil with a vinyl content of 0.42% and a viscosity of 500cs, add 0.05 parts of distilled water, and stir evenly with a kneader, then add 0.5 parts of dimethyldichlorosilane, Heat up to 50°C and stir for 1 hour, continue to heat up to 110°C, condense and reflux for 2 hours, continue to heat up to 160°C to remove volatiles in a vacuum, and obtain the required base rubber after cooling.

[0031] Preparation of component A: Add 0.1 part of platinum-vinylpolysiloxane chelate with a platinum content of 3000ppm to 8 parts of methyl silicone oil with a viscosity of 100cs, stir and disperse evenly, then add 100 parts of base rubber, and put it in a vacuum Mix evenly in a defoamer to make component A.

[0032] Preparation of component B: 100 parts of base rubber, 4.5 parts of hydrogen-containing silicone oil with a hydrogen content of 0.8%, 2 parts of a vinyl silicone oil with a viscos...

Embodiment 2

[0034] Preparation of the base rubber: Add 8 parts of white carbon black to 100 parts of vinyl silicone oil with a vinyl content of 0.10% and a viscosity of 5000cs, add 0.08 parts of distilled water, stir evenly with a kneader, then add 0.8 parts of dimethyldichlorosilane, Raise the temperature to 60°C and stir for 1 hour, continue to raise the temperature to 130°C, condense and reflux and stir for 2 hours, raise the temperature to 180°C to remove volatile matter in a vacuum, and obtain the required base rubber after cooling.

[0035] Preparation of component A: Add 0.12 parts of platinum-vinylpolysiloxane chelate with a platinum content of 5000ppm into 12 parts of methyl silicone oil with a viscosity of 500cs, stir and disperse evenly, then add 100 parts of base rubber, and put it in a vacuum Mix evenly in a defoamer to make component A.

[0036] Preparation of component B: 100 parts of base rubber, 3.5 parts of hydrogen-containing silicone oil with a hydrogen content of 0.25...

Embodiment 3

[0038]Preparation of base rubber: add 10 parts of white carbon black to 100 parts of vinyl silicone oil with a vinyl content of 0.25% and a viscosity of 2500cs, add 0.1 parts of distilled water, stir evenly with a kneader, add 1 part of silane coupling agent, and heat up to 55 Stir at ℃ for 1 hour, continue to heat up to 120°C, condense and reflux for 2 hours, continue to heat up to 170°C to remove volatiles in a vacuum, and obtain the required base rubber after cooling.

[0039] Preparation of component A: Add 0.2 parts of platinum-vinylpolysiloxane chelate with a platinum content of 3000ppm into 9 parts of methyl silicone oil with a viscosity of 450cs, stir and disperse evenly, then add 100 parts of base rubber, and put it in a vacuum degasser. Mix evenly in the bubble machine to make component A.

[0040] Preparation of component B: 100 parts of base rubber, 1.9 parts of hydrogen-containing silicone oil with a hydrogen content of 1.2%, 7.1 parts of vinyl silicone oil with a...

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Abstract

The invention discloses an organic silicon pouring sealant for an LED (Light Emitting Diode) flexible lamp bar and a preparation method thereof. The raw material formula of the organic silicon pouring sealant for the LED flexible lamp bar comprises a component A and a component B, wherein the components A and B are both formed by kneading the vinyl silicon oil with the white carbon black subjected to in-situ treatment. According to the invention, the white carbon black subjected to in-situ treatment is taken as a reinforcing padding, so that the pouring sealant is endowed with excellent strength and transparency and has the characteristics of excellent caking property, ageing resistance, yellowing resistance, good light transmission, and the like. The cost of the pouring sealant is much lower than that of the system reinforced by silicon resin; the flexibility of the LED flexible lamp bar is obviously increased; the preparation method is simple and feasible; the dosage of the expensive thickening agent is less; no silicon resin is adopted; the cost performance is high; the viscosity is moderate; the sealant has excellent operability; the organic silicon pouring sealant contains no volatile solvent, is safe and non-toxic and is environmentally friendly and odor-free.

Description

technical field [0001] The invention relates to a transparent electronic potting material, in particular to a high-strength transparent silicone potting compound for LED flexible light strips and a preparation method thereof, which protects, resists stretching and protects electronic components and assemblies. Insulation protection. Background technique [0002] As an important member of the LED family, LED flexible light strips are used more and more in urban night beautification, architectural lighting and vehicle lighting. In order to ensure the reliability and service life of the LED flexible light strip, taking into account the product's light transmittance, aging resistance, yellowing resistance and other properties, choosing a suitable LED flexible light strip potting compound has become a key issue. [0003] At present, there are three types of products in the market: epoxy resin potting compound, polyurethane potting compound and silicone potting compound. [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/07C09J11/04C09C1/28C09C3/12
Inventor 张利安高传花江昊韩志远周光大
Owner HANGZHOU FIRST APPLIED MATERIAL CO LTD
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