ChemicalBook CAS DataBase List 1,4-Butanediol dimethacrylate

1,4-Butanediol dimethacrylate synthesis

6synthesis methods

Product Name:1,4-Butanediol dimethacrylate
CAS Number:2082-81-7
Molecular formula:C12H18O4
Molecular Weight:226.27

Methyl methacrylate and 1,4-butanediol are taken as raw materials. The following steps conclude: reacting the methyl methacrylate with the 1,4-butanediol to prepare the product of 1,4-butanediol dimethacrylate with the purity of over 99.0 percent by adopting a reaction distillation ester exchange process in the presence of a catalyst and a polymerization inhibitor, wherein the catalyst is an organic tin catalyst. The polymerization inhibitor is a composite polymerization inhibitor.

110-63-4 Synthesis

110-63-4
701 suppliers
$30.19/250g

79-41-4 Synthesis

79-41-4
501 suppliers
$14.00/5g

2082-81-7
241 suppliers
$10.00/25g

Yield:2082-81-7 98.83%

Reaction Conditions:

with cyclohexane;hydroquinone in water at 85 - 125;

Steps:

1-5

_{Put 85.59g of methacrylic acid, 28g of 1,4-butanediol into the reaction bottle equipped with the water separator, Polymerization inhibitor hydroquinone 1.14g and water-containing cyclohexane 51.12g, stir to dissolve, Raise the temperature to 85 ° , add 1.70g of HZSM-5 molecular sieve catalyst, Then heat up and maintain at 125 ° C, 1,4-butanediol reacts with methacrylic acid to form 1,4-butanediol dimethacrylate, Continue the reaction until there is no water in the water separator, and end the reaction. The measured acid value was 0.066 mgKOH / g. The catalyst is separated by filtration, Separate the funnel to separate the light yellow organic phase, and then wash the organic phase 3 times with distilled water. Then, the temperature is raised to 75-80 ° C., and the organic solvent is distilled off under reduced pressure under a pressure of 0.03-0.06 MPa. After cooling, the target product 1,4-butanediol dimethacrylate is obtained. By gas chromatography analysis, the ester content was 98.83%.}

References:

CN110668939,2020,A Location in patent:Paragraph 0012-0016

110-63-4 Synthesis

110-63-4
701 suppliers
$30.19/250g

80-62-6 Synthesis