Since the N-terminus of every amino acid will react with acetic anhydride
, only amino acids that acquire two or more acetyl groups are likely to react with anhydrides
when they are found in a polypeptide chain.
Similarly Jurecek (1955) reported that anhydrides
do not react with dry pyridine.
Films of the epoxidized resin were cured at an elevated temperature with either diamine or anhydride
APPLICATION: With a long useful life in the emulsion form, ethyl oleate succinic anhydride
could become one of the preferred sizing chemicals in papermaking.
Some ASA's are made by heating an alpha olefin with maleic anhydride
, For other ASA's, the alpha olefin is first isomerized to a mixture of linear internal olefins, which is then combined with maleic anhydride
to make a mixture of ASA's having a lower pour point than an ASA made directly from an alpha olefin.
One of the most frequently used monomers is maleic anhydride
(MA), owing to the high reactivity of anhydride
group in successive reactions.
Resins: Platforms for Polymeric Surfactants
Two saturated anhydrides
, HHPA (hexahydrophthalic anhydride
) and MeHHPA (methylhexahydrophthalic anhydride
) provide excellent electrical properties and good weatherability.
LONDON -- Global production and consumption of Maleic Anhydride
(MA) in 2008 were approximately 1.
However, it is known that in the absence of catalyst the anhydrides
do not react directly with the epoxy group.
The company has carried its technology a logical step forward with Luchem HA-B18, made by pre-reacting HA-R100 with a polyolefin resin--in this case an octadecene-maleic anhydride
copolymer, similar to a maleated PP.
Notice that those reactions consume -OH chain ends and anhydrides
find use in filament winding, pultrusion, prepreg manufacture, potting and encapsulation, powder coating, and vacuum-pressure impregnation.
Compared with aromatic amines and anhydrides
, CE's yield higher HDT's (355-392 F) with no compromise of mechanical strength, lower water absorption, and lower dielectric constant (3.
and polyanhydrides for curing epoxy resins.