Characteristics and synthetic raw materials of aliphatic dibasic acid ester plasticizers

Aliphatic dibasic acid ester plasticizers mainly include esters of adipic acid, azelaic acid, and sebacic acid. They are composed of these dibasic acids andaYuan Chunzhi continuedEsterified. For example, dioctyl sebacate is directly composed of sebacic acid and 2-ethylhexanolEsterSynthesized .

The characteristics of aliphatic dibasic acid ester plasticizers are It has excellent low-temperature properties. When added to polymer materials, the embrittlement temperature of materials or products can reach –30~– 70℃,Sebacate esters are the most prominent in applications, especially sebacic acid di( 2-ethyl)hexyl ester（DOS)The most widely used. Their disadvantage is that they have poor compatibility, so they are generally used as auxiliary plasticizeragent Use.

Main raw material for manufacturing sebacate esterSebacateDiacid, currentlymainIf from薖Comes from the cracking of sesame oil, The price is relatively highExpensive, so using petrochemical raw materials to synthesize sebacic acid is still an industrial production of plastic plasticizers a problem that needs to be solved. In recent yearshasThere are some synthesis methods , which 黑; letter-spacing: 0px;”>中中一So我二acidMonomethyl ester is used as raw material and sebacic acid is synthesized through electrolytic coupling. It has been industrially produced abroad.

ren二Acid ester also has good cold resistance. But the originalThe source of azelaic acid is difficult,The price is relatively expensive. The cold resistance of adipate is also good, but it is different from DOA (Dioctyl adipate) is similar：NoleculeAmountSmaller and more volatile, useis subject to certain restrictionsMade by yourselfCold resistance ratio of linear alcohol esters of diacidsDOAGood,waveFa Sex is alsosmaller.

A dodecane has appeared in recent years Dicarboxylic acidAcid ester, good cold resistance. Cold-resistant plasticizer and its raw materialsTwelveAlkane Di Carboxylic acidAcid is based on butaneene is the starting material . 通Prepared by cyclotrimerization, hydrogenation and oxidation.

Dodecane DiCarboxyEsterification reaction between acid and alcohol,Dodecane can be producedDicarboxylic acid esterAcid ester.

This plasticizer has good low-temperature performance due to its rich source of raw materials. , is a promising cold-resistant growing plantplasticagent.