1.2.3.4- BUTANETETRACARBOXYLIC

Maleic acid derivatives give 1,2,3,4-butanetetracarboxylic acid derivatives under similar conditions 351 352). 

Tetraethyl 1,2,3,4-Butanetetracarboxylate 1,2,3,4-Butanetetracar-boxylic acid, tetraethyl ester (8,9) (4373-15-3)... 

Permanent-press fabrics are often cured with TV-methy-lol compounds, such as 4.18, and tend to release formaldehyde after the cure. (Formaldehyde [a carcinogen] from various formaldehyde resins is a problem in some homes.115) These can be replaced with polycarboxylic acids, such as the 1,2,3,4-butanetetracarboxylic acid (4.19), which cure via the cyclic anhydride.116 Both dyeing and durable-press treatments can be combined in a single step, if desired.117... 

Between the nonaromatic acids or acid derivatives claimed for poly(ester-im-ide) resins arebicyclo(2,2,2)-oct-2-ene-2,3,5,6-tetracarboxylic dianhydride (19) for wire enamels [69], and 1,2,3,4-butanetetracarboxylic acid (20) for wire enamels, lamination materials and adhesive sheets [70]. The butanetricarboxy-lic acid anhydride monomethylester [71] and the cyclobutanetetracarboxylic acid (21) [72] are also claimed as poly(ester-imide) forming raw materials. 

Solder resist materials, usable in electrical and electronic field, based on po-ly(ester-imide)s made from 1,2,3,4-butanetetracarboxylic acid and p-aminobe-zoic acid or ethanolamine have been patent protected. UV sensitivity was obtained by using fumaric or p-phenylendiacrylic acid [179]. In another patent cinnamic acid [180] is used for a temperature resistant solder resist formulation. UV-curable foils made from poly(ester-imide)s containing a benzophenonetet-racarboxylic diimide are known [181]. 

Chem. Descrip. 1,2,2,6,6-Pentamethyl-4-piperidyl/tridecyl 1,2,3,4-butanetetracarboxylate CAS 101544-98-3... 

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