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A kind of preparation method of polyacrylate transparent and absorbing ultraviolet light

A polyacrylate, ultraviolet light technology, applied in optics, optical components, instruments, etc., can solve the problems of high implementation cost and cumbersome steps

Active Publication Date: 2017-09-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Method (1) generally involves more cumbersome steps, and in industry, the implementation cost is higher

Method used

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  • A kind of preparation method of polyacrylate transparent and absorbing ultraviolet light
  • A kind of preparation method of polyacrylate transparent and absorbing ultraviolet light
  • A kind of preparation method of polyacrylate transparent and absorbing ultraviolet light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 1

[0046] The synthesis of embodiment 1 one-pot method polymer

[0047] Before the reaction, the autoclave was dried in an oven at 110° C. for more than 3 hours, and then placed in a drying tower to cool naturally to room temperature. Add 3.0mg Zn-Co(III) DMCC catalyst (catalyst 1), 10.0mg cetyltrimethylammonium bromide (CTAB) (catalyst 2), 12.8mg dicumyl peroxide (initiator), 0.55mL glycidyl methacrylate (GMA) (containing double bond epoxide) and 4.0ml dimethylformamide (DMF) (polar solvent), after sealing the reaction kettle, press into 2.0Mpa CO 2 And put it in an oil bath at 125°C, put it in an ice-water bath after reacting for 9 hours, and release the pressure slowly after cooling down to room temperature. The crude product was centrifuged in a high-speed centrifuge and filtered to obtain a filtrate, which was added dropwise to 200 mL of methanol. The precipitate was filtered and washed twice with methanol, and finally the polymer was dried in a vacuum oven at 60°C until c...

Embodiment 2 1

[0048] Synthesis of embodiment 2 one-pot method polymer

[0049] Using the method of Example 1, place it in an ice-water bath after reacting for 12 hours, slowly release the pressure after cooling down to room temperature, and keep the rest of the conditions unchanged. The test results are shown in Table 1.

Embodiment 3 1

[0050] Synthesis of embodiment 3 one-pot method polymer

[0051] Adopt the method of embodiment 1, DMF is added 0.55mL, other conditions are unchanged, test result is shown in Table 1.

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Abstract

The invention relates to the field of high molecular material synthesis and aims to provide a method for preparing transparent polyacrylate for selectively absorbing ultraviolet light. The method is particularly divided into a one-pot method and a fractional step method; according to the one-pot method, a catalyst, an initiator, epoxide containing a double bond and solvent are added into a high-pressure reaction kettle, CO2 is introduced, after a reaction is conducted, a coarse product is obtained, and the transparent polyacrylate is obtained after postprocessing; according to the fractional step method, firstly, a catalyst, polymerization inhibitor and epoxide containing a double bond are added into a high-pressure reaction kettle, CO2 is introduced, after a reaction is conducted, cyclic carbonates containing a double bond is obtained through a solution method or a body method, and then the transparent polyacrylate is obtained by conducting polymerization through a free radical polymerization method. By means of the method, a material which can selectively absorb ultraviolet light and has high transparency is synthesized effectively; the catalyst does not affect colorless transparency of polymer; the monomer conversion rate is quite high, and purification and performance of the polymer are greatly improved; the method is simple and easy to operate, and the performance of the polymer can be adjusted and controlled by changing the catalyst, initiator, the reaction temperature, the reaction pressure and the like.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, and in particular relates to a preparation method and application of transparent and ultraviolet-absorbing polyacrylate. Background technique [0002] UV absorber is one of the additives widely used in polymer materials. Most commercial UV absorbers are small molecule additives, which are easily migrated out due to the influence of the external environment during their use, such as light, heat, and rain. During the processing of polymer materials, some small molecular UV absorbers have poor compatibility with the matrix resin, which will cause phase separation, blooming, etc., thereby deteriorating the effect of additives. In order to solve this problem, it is undoubtedly a good way to realize the polymerization of small molecule additives, that is, to graft or copolymerize the light stabilizer functional group on the polymer main chain, so that it can be "permanently" in the form of ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F20/32C08F120/32C08L33/04C08L33/14G02B1/04
CPCC08F20/32C08F120/32C08L33/04C08L33/14C08L2201/08C08L2201/10C08L2205/02G02B1/04
Inventor 张兴宏刘斌
Owner ZHEJIANG UNIV
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