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Low-stress optical fiber ring adhesive capable of being cured at room temperature

A technology of room temperature curing and room temperature curing agent, applied in the direction of epoxy resin glue, adhesive, adhesive type, etc., can solve the problems of large expansion stress, cracking of ring body, low temperature crosstalk drop of optical fiber ring, etc., and achieve small expansion stress , reduce stress relaxation, improve the effect of precision

Pending Publication Date: 2022-06-24
武汉长盈鑫科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curing terminal temperature of the commonly used optical fiber ring adhesive is about 80°C, so the theoretical zero stress point is about 80°C, and the working temperature range of the gyroscope is required to be -50°C to 85°C or even extended to -55°C to 95°C. Wide temperature range, so the expansion stress due to the difference in expansion coefficient at low temperature is particularly large, resulting in a significant drop in low-temperature crosstalk of the optical fiber ring, and even ring body cracking

Method used

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  • Low-stress optical fiber ring adhesive capable of being cured at room temperature
  • Low-stress optical fiber ring adhesive capable of being cured at room temperature
  • Low-stress optical fiber ring adhesive capable of being cured at room temperature

Examples

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preparation example Construction

[0036] 1. The preparation method of organosilicon modified epoxy resin, comprising the following steps:

[0037] 1) Add 844g (2mol) methacryloyloxypropyl polydimethylsiloxane, 284.3g (2mol) glycidyl methacrylate, 218.26g (1mol) dicyclopentadienyl methacrylate In the three-necked flask, then add 500g of solvent toluene, stir evenly, add 13g of azobisisobutyronitrile and 24g of chain transfer agent n-dodecyl mercaptan, and heat up to 70°C for 6 hours of insulation reaction;

[0038] 2) The product obtained by the reaction in step 1) is precipitated with refrigerated methanol, the upper layer solvent is removed to obtain a viscous liquid, and then the product is subjected to vacuum treatment at 40-60° C. for 24 hours using a vacuum drying oven to obtain the organosilicon Modified epoxy resin A1, the tested epoxy value is 0.15Eq / 100g.

[0039] 2. Synthesis of Coupling Agent Modified Reactive Diluent

[0040] 17.723g of silane coupling agent isocyanate methyltrimethoxysilane, 175...

Embodiment 1

[0046] A room temperature curing low stress optical fiber ring adhesive is composed of two components, A and B, wherein the A component is calculated by weight percentage, and the content of each component is: modified epoxy resin A1 70%, bisphenol E epoxy resin EPOX-MK R710 15%, coupling agent modified epoxy diluent A2 15%, the sum of each component meets 100%; component B is silicone modified room temperature curing agent 100%; A:B = 1.8:1 (mass ratio).

[0047] The preparation method of the above-mentioned low-stress optical fiber ring adhesive is as follows: according to the above-mentioned A group distribution ratio, weigh each raw material component, use a disperser to stir at about 70 ℃ for 60 minutes at a speed of 1000 rpm, and after completely mixing, Use a 500-mesh filter to filter and place it in a 40°C oven for 1 day to deaerate to obtain the finished product component A; after the synthesis of the B component, use a 500-mesh filter to filter the finished product c...

Embodiment 2

[0049] A room temperature curing low stress optical fiber ring adhesive is composed of two components, A and B, wherein the A component is calculated in weight percentage, and the content of each component is: modified epoxy resin A1 60%, bisphenol E epoxy resin EPOX-MK R710 20%, coupling agent modified epoxy diluent A2 20%, the sum of each component meets 100%; component B is silicone modified room temperature curing agent 100%; A:B = 1.56:1 (mass ratio).

[0050] The preparation method of the above-mentioned low-stress optical fiber ring adhesive is as follows: according to the above-mentioned A group distribution ratio, weigh each raw material component, use a disperser to stir at about 70 ℃ for 60 minutes at a speed of 1000 rpm, and after completely mixing, Use a 500-mesh filter to filter and place it in a 40°C oven for 1 day to deaerate to obtain the finished product component A; after the synthesis of the B component, use a 500-mesh filter to filter the finished product ...

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Abstract

The invention provides a low-stress optical fiber ring adhesive capable of being cured at room temperature, which is characterized by comprising a component A and a component B. The component A comprises the following components in percentage by weight: 40-80% of organic silicon modified epoxy resin, 10-40% of bisphenol E epoxy resin and 10-30% of coupling agent modified epoxy diluent, and the sum of the components is 100%. And the component B is an organic silicon modified room temperature curing agent. The room-temperature-cured low-stress optical fiber ring adhesive has the advantages of high room-temperature curing conversion rate, high glass transition temperature (more than 100 DEG C), similar expansion coefficient (100-200 * 10 <-6 > / K) to a ring winding adhesive, light color after curing, good aging resistance, high bonding strength retention rate and the like, and is cured at room temperature, so that a zero stress point of an optical fiber gyroscope is at room temperature, the stress relaxation phenomenon can be effectively reduced, and the service life of the optical fiber gyroscope is prolonged. The problem of cracking after temperature cycle is solved, and the long-term stability of the precision of the gyroscope is improved.

Description

technical field [0001] The invention belongs to the field of optical fiber rings and epoxy adhesives, in particular to a low-stress optical fiber ring bonding adhesive cured at room temperature. Background technique [0002] The fiber optic gyroscope is an all-solid-state gyroscope that uses the Sagnac effect to test the rotational angular velocity. It has the characteristics of simple structure and wide dynamic range, and has become one of the mainstream instruments in the field of inertial measurement and guidance technology. The core sensitive element of the fiber optic gyroscope is the polarization-maintaining fiber ring, including the skeleton fiber ring and the skeleton fiber ring. The skeleton-free optical fiber ring is composed of polarization-maintaining fiber and ring-wrap adhesive, and an optical fiber ring adhesive needs to be used to bond the optical fiber ring and the metal shell (usually aluminum alloy, titanium alloy, iron-nickel alloy material, etc.). [00...

Claims

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Application Information

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IPC IPC(8): C09J163/00C09J151/08
CPCC09J163/00C09J151/085C08L63/00Y02A30/00
Inventor 崔丽云余晓梦黄星万欢桂振东皮亚斌高旭
Owner 武汉长盈鑫科技有限公司