9051-31-4Relevant articles and documents
Method for synthesizing alkyl (meth) acrylate
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Paragraph 0032-0073; 0115-0134, (2021/12/08)
The invention discloses a synthesis method of alkyl (meth) acrylate, and belongs to the field of organic chemical synthesis. The synthesis method of the present invention employs a heterogeneous solid acid catalyst. The polymerization inhibitor and (meth) acrylic acid were put into the reaction kettle and heated to 50 - 90 °C, and an epoxide was introduced into the reaction kettle for reaction. The reaction solution is filtered to remove the homogeneous solid acid catalyst and the rectification to obtain the target product. The synthesis method not only can improve the selectivity of a target product (methyl) acrylic acid alkyl ester, but also can effectively inhibit the generation of high-boiling-point double esters of by-products generated by the addition of bis (methyl) acrylic acid.
Intermediate substance with acid degradation function, preparation method of same, and polymerizable monomer prepared from intermediate substance
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Paragraph 0062; 0065, (2021/11/27)
The invention discloses an intermediate substance with an acid degradation function and a preparation method of same; whereinthe preparation method of the intermediate substance comprises the following steps: dissolving 2-nitrobenzaldehyde in a proper amount of dichloromethane, if the reaction substance is cinnamyl aldehyde, mixing the substance with trimethyl orthoformate without the help of a dichloromethane solvent with hafnium trifluoromethanesulfonate as a catalyst; then under the condition of room temperature, performing magnetic stirring to obtain the target substance in a very short time. According to the invention, the defects of time consumption, energy consumption, solvent consumption and the like caused by adopting p-toluenesulfonic acid as a catalyst for preparing the substance traditionally are avoided, and the prepared substance has an acid degradation function. Corresponding 2-nitrobenzaldehyde or cinnamyl aldehyde can be obtained through acid degradation, and in addition, the intermediate substance provides convenience for subsequent preparation of polymerizable monomers with an acid degradation function.
LENS ADHESIVE, CEMENTED LENS, AND IMAGING MODULE
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Paragraph 0274; 0276, (2020/11/30)
According to the present invention, a lens adhesive including a compound represented by General Formula 1 is provided. [in-line-formulae]Pol1-Sp1-L1-Ar-L2-Sp2-Pol2??(General Formula 1)[/in-line-formulae] In the formula, Ar is an aromatic ring group represented by General Formula 2-2 and the like. In the formula, Z1 and Z2 each represent a hydrogen atom, a methyl group, and the like; A1 and A2 each represent —S— and the like; X represents C(Rz)2 and the like (where Rz is a substituent, and two Rz's may form a ring); L1 and L2 each represent a single bond, —O—, —OC(═O)—, —OC(═O)O—, —OC(═O)NH—, and the like; Sp1 and Sp2 each represent a single bond or a linking group such as a linear alkylene group; Pol1 and Pol2 each represent a hydrogen atom or a polymerizable group; and a compound represented by General Formula 1 has at least one polymerizable group. Using the lens adhesive, it is possible to provide a cemented lens that is unlikely to deteriorate due to light, and an imaging module having high durability.
