Acrylic rubber properties

   Date:2021-03-30     Author:sdrkxskj    Browse:39    
Core tips:The comonomers of ACM can be divided into three types of monomers: main monomer, low temperature oil resistant monomer a
 The comonomers of ACM can be divided into three types of monomers: main monomer, low temperature oil resistant monomer and vulcanization point monomer. Main monomer, commonly used main monomers are methyl acrylate, ethyl acrylate, butyl acrylate and 2-ethylhexyl acrylate, etc.; as the carbon number of the pendant ester group increases, the cold resistance increases, but the oil resistance deteriorates In order to maintain the good oil resistance of ACM and improve its low temperature performance, some low temperature oil resistant monomers with polar groups are synthesized.
Low-temperature and oil-resistant monomer, traditionally used alkoxy ether acrylate to participate in the copolymerization to obtain ACM with a cold-resistant temperature below -30℃; later in industrial production, methoxyethyl acrylate was used as a comonomer to produce cold-resistant ACM, further reducing the use temperature . In recent years, foreign patents reported that the use of acrylate polyethylene glycol methoxy ester, dimethoxy ethyl maleate, etc. as low-temperature oil-resistant monomers is more effective. In addition, DuPont adopts solution copolymerization of ethylene and methyl acrylate to introduce ethylene into the polymer backbone, which can significantly improve the low-temperature flexibility of the product.
Vulcanization point monomer, in order to make ACM convenient for vulcanization treatment, a certain amount of vulcanization point monomer must be added to participate in the copolymerization. Generally, the content of vulcanization point monomer is less than 5%. Vulcanization point monomer can be divided into chlorine-containing according to reactive points Type, epoxy type, carboxyl type and double bond type, etc. Among them, the industrial applications mainly include chlorine-containing vinyl chloroacetate, epoxy glycidyl methacrylate, allyl glycidyl ester, double bond type 3-methyl-2-butenyl ester, carboxylic acid type There are also patent reports using allyl acetoacetate and so on.
 
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