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A special high-strength and high-adhesion encapsulation silicone for pdc

A high-strength, high-viscosity technology, used in polymer adhesive additives, non-polymer adhesive additives, adhesives, etc., can solve the problem of poor resistance to cold and thermal shock, cannot be widely used, and corrodes internal components, etc. problem, to achieve the effect of good thermal shock resistance, excellent curing depth and high strength

Inactive Publication Date: 2017-12-19
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Among the silicone resins, the traditional packaging silicone for reversing radar is a condensation curing system, which can be bonded to PA66 and PCB by adding amino silane, etc., but it releases small molecular by-products and the curing depth is limited. , cannot be widely used
Ordinary addition type packaging silica gel can meet the requirements of devices with different thicknesses, but it is difficult to bond with PA66 and PCB, and has poor thermal shock resistance, and moisture will enter along the gap between the colloid and the PA66 shell. Inside the part, the internal components are corroded, causing the part to fail, and ordinary amino silanes will seriously inhibit the curing in the silicone addition system

Method used

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  • A special high-strength and high-adhesion encapsulation silicone for pdc
  • A special high-strength and high-adhesion encapsulation silicone for pdc
  • A special high-strength and high-adhesion encapsulation silicone for pdc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The process of preparing this high-strength and high-adhesion room-temperature-curing encapsulation silicone includes:

[0056] Preparation of component A: weigh methyl vinyl polysiloxane resin at 25°C, such as structural formula (1), where a=0.2, b=1.0, a+b=1.2, 10 parts, vinyl-terminated Silicone oil, viscosity is 5000mPa.S, 79.9 parts, impact modifier, such as structural formula (5), wherein a is 1, b is 4, c is 4, 10 parts, catalyst, platinum content is 10000ppm, 0.1 parts, add double In the planetary high-speed disperser, fully stir for 2 hours, nitrogen protection, mix evenly, vacuumize, fill and seal and store.

[0057]Preparation of component B: weigh methyl vinyl polysiloxane resin at 25°C, such as structural formula (1), where a=0.2, b=1.0, a+b=1.2, 10 parts, vinyl-terminated Silicone oil with a viscosity of 100mPa.S, 81.8 parts, methyl hydrogen polysiloxane, such as structural formula (2), wherein x is 0, y is 4, 6 parts, adhesive penetrating agent, such as ...

Embodiment 2

[0059] The process of preparing this high-strength and high-adhesion room-temperature-curing encapsulation silicone includes:

[0060] Preparation of component A: weigh methyl vinyl polysiloxane resin at 25°C, such as structural formula (1), where a=1.0, b=0.2, a+b=1.2, 30 parts, vinyl end Silicone oil, viscosity 100mPa.S, 64 parts, impact regulator, such as structural formula (5), where a is 3, b is 1, c is 1, 5 parts, catalyst, 2000ppm, 1 part, add double planetary high-speed dispersion in sequence In the machine, fully stir for 2 hours, nitrogen protection, mix evenly, vacuumize, fill and seal and store.

[0061] Preparation of component B: weigh methyl vinyl polysiloxane resin at 25°C, such as structural formula (1), where a=1.0, b=0.2, a+b=1.2, 40 parts, vinyl-terminated Silicone oil, viscosity is 5000mPa.S, 35.5 parts, methyl hydrogen polysiloxane, such as structural formula (3), wherein m is 10, n is 10, 15 parts, adhesive penetrating agent, such as structural formula ...

Embodiment 3

[0063] The process of preparing this high-strength and high-adhesion room-temperature-curing encapsulation silicone includes:

[0064] Preparation of component A: weigh methyl vinyl polysiloxane resin at 25°C, such as structural formula (1), where a=0.5, b=0.5, a+b=1.0, 25 parts, vinyl-terminated Silicone oil, viscosity 1000mPa.S, 68.5 parts, impact regulator, such as structural formula (5), where a is 2, b is 3, c is 3, 6 parts, catalyst, 5000ppm, 0.5 parts, add double planetary high-speed dispersion in turn In the machine, fully stir for 2 hours, nitrogen protection, mix evenly, vacuumize, fill and seal and store.

[0065] Preparation of component B: weigh methyl vinyl polysiloxane resin at 25°C, such as structural formula (1), where a=0.5, b=0.5, a+b=1.0, 25 parts, vinyl-terminated Silicone oil, viscosity is 1000mPa.S, 56.2 parts, methyl hydrogen-containing polysiloxane, such as structural formula (2), wherein x is 4, y is 10, 6 parts, methyl hydrogen-containing polysiloxa...

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Abstract

The invention relates to PDC special-purpose high-strength high-viscosity packaging silica gel. An ingredient A and an ingredient B are mixed according to a weight ratio of 1: 1 and the mixture is cured at a room temperature. The ingredient A comprises, by weight, 10-30 parts of methylvinylpolysiloxane resin, 59-84.9 parts of methyl vinyl silicone oil, 5-10 parts of an impact regulator and 0.1-1 part of a catalyst. The ingredient B comprises, by weight, 10-40 parts of methylvinylpolysiloxane resin, 35.5-81.8 parts of methyl vinyl silicone oil, 6-15 parts of polymethylhydrosiloxane, 2-8 parts of a bonding osmotic agent, 0.1-0.5 parts of an inhibitor and 0.1-1 part of black color paste. Compared with the existing packaging silica gel, the PDC special-purpose high-strength high-viscosity packaging silica gel has excellent cured depth and bonding strength, has excellent adhesion between nylon 66 and PCB, and has good weatherability and good hot and cold impact resistance.

Description

technical field [0001] The invention relates to the technical field of silicone encapsulation silica gel, in particular to a high-strength and high-adhesion encapsulation silica gel specially used for PDC. Background technique [0002] PDC is the English abbreviation of Parking Distance Control, translated as reversing radar. Reversing radar is a vehicle device that detects obstacles behind the car, assists the process of reversing the car, and reminds the driver. As an electronic component that can effectively improve driving safety, the performance of reversing radar is becoming more and more important. [0003] The electronic component housing of the parking radar is usually injection molded by glass fiber reinforced PA66 (polyamide 66 or nylon 66), and there are probes for transmitting and receiving ultrasonic waves, COB circuit boards, controllers, etc. inside. [0004] Insulating resin can be used to encapsulate and seal the entire parking sensor. The performance re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/07C09J183/05C09J11/06C09J11/08C09J11/04
CPCC08K2201/014C08L2201/08C08L2205/025C08L2205/035C09J11/04C09J11/06C09J11/08C09J183/04C08L83/04C08L83/06C08L83/08C08K13/02C08K3/04C08K5/5419C08K5/05C08K5/5465
Inventor 张丽娅陈维孙刚
Owner YANTAI DARBOND TECH
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