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Recycling method of thermosetting resin lens waste

A resin lens and thermosetting technology, applied in the field of alcoholysis recycling of thermosetting resin lenses, can solve the problems of polluting the environment, waste of resources, etc., and achieve the effect of high utilization value, less consumption, and overcoming secondary waste discharge and environmental pollution.

Active Publication Date: 2014-01-01
CHANGZHOU XIAOGUO INFORMATION SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to provide a method for recycling thermosetting resin lens waste to solve the problems of thermosetting resin lens waste polluting the environment and wasting resources

Method used

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  • Recycling method of thermosetting resin lens waste

Examples

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Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Take 100 parts of resin lens waste sheet powder, 200 parts of diethylene glycol, and 1 part of zinc acetate. Stir evenly and heat up to the reaction temperature. The temperature is controlled at 210-230° C., and the reaction time is 2.5-3 hours. The yield is 100%, and the product is a light yellow clear liquid with a viscosity of 225mPa·s.

Embodiment 2

[0043] Embodiment 2: Get 100 parts of resin lens waste sheet material powder, 180 parts of diethylene glycol, 1 part of zinc acetate, 0.6 part of sodium hydroxide, stir evenly and heat up to the reaction temperature, the temperature is controlled at 210-230 ° C, and the reaction time is 1 After ~1.5 hours, the alcoholysis rate is 100%, and the product is a dark yellow clear transparent liquid with a viscosity of 180mPa·s.

Embodiment 3

[0044] Example 3: Take 100 parts of resin lens waste grinding dust powder, 220 parts of diethylene glycol, 1 part of zinc chloride, and 1 part of sodium hydroxide, stir evenly and heat up to the reaction temperature. The temperature is controlled at 210-230 ° C. The reaction time After 2.0 to 2.5 hours, the alcoholysis rate is 100%, and the product is a brown clear liquid with a viscosity of 240mPa·s.

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Abstract

The invention discloses a recycling method of thermosetting resin lens waste. The method includes: (1) preparing thermosetting resin lens waste powder; (2) in terms of mass, adding 100 parts of the thermosetting resin lens waste powder, 100-400 parts of an alcoholysis agent, and 0.4-6 parts of a catalyst into a reactor; (3) controlling the alcoholysis reaction temperature at 120DEG C-260DEG C; and (4) letting the reaction last for 1-3h, then stopping heating, and performing cooling to obtain an alcoholysis product. According to the method provided in the invention, the resin lens waste undergoes thorough alcoholysis, the reaction time is short, and the solution transparency is good. The catalyst dosage is small, no influence can be generated on the product application, and the recycling value of the alcoholysis product is enhanced.

Description

technical field [0001] The invention relates to a resin lens recovery method, in particular to an alcoholysis recovery method for a thermosetting resin lens. Background technique [0002] Resin lens waste refers to thermosetting resin lens waste or waste generated from thermosetting resin lens processing. Resin lens waste can be in the form of powder, block and so on. When the resin lens waste is contaminated by other impurities, the bulk material should be washed to remove impurities before use, and the powder material should be removed from impurities, and dried for later use if necessary. [0003] Resin lenses occupy 70% to 80% of the market share of spectacle lenses due to their excellent optical performance and good cost performance. Optical resins used in resin ophthalmic lenses mainly include thermoplastic resins and thermosetting resins. Thermoplastic optical resins are mainly polycarbonate (PC), polymethacrylate (PMMA), polystyrene (PS), etc., and their waste can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/24
CPCY02W30/62
Inventor 徐亮成谢新萍高炜斌马立波李珊珊王自瑛
Owner CHANGZHOU XIAOGUO INFORMATION SERVICES
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