The Reaction Product from Aspartic and Maleic Acids in Aqueous Ammoniacal Solution<sup>1</sup>

Zienty, Ferdinand B.; Katlafsky, B.; Pierron, E. D.

doi:10.1021/jo01350a508

J. Org. Chem.

1966

DOI: 10.1021/jo01350a508

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The Reaction Product from Aspartic and Maleic Acids in Aqueous Ammoniacal Solution¹

Ferdinand B. Zienty¹,

B. Katlafsky²,

E. D. Pierron³

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1982

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Reactivity of crosslinked polymers, 1. Aminoplasts as blowing and initiating agents

Simionescu¹,

Benedek²

1982

Angew. Makromol. Chem.

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Certain crosslinked aminoplasts used as fillers and pigments in other industrial areas were investigated in the thermomechanical processing (injection and extrusion moulding) of the common thermoplasts as blowing agents. The use of the macromolecular blowing agent in the temperature range of 175 -210°C with concentrations of 0.5 -2.0 wt.% led to polymers having a white colour, uniform porosity and reduced density (0.75 -0.9 g/cm3 for polystyrene foam). Examination by extrusion moulding of the blowing effect showed that the aminoplast had only a slight sensitivity toward the working parameters (temperature, pressure). This was explained by the thermogravimetric data, which demonstrated that the blowing effect was due to the volatilization of a small (about 10%) fraction of the resin, on the basis of its residual reactivity. Reactivity of Crosslinked Polymers, IDie Aktivitatsunterschiede zwischen der gealterten und der frischen Reaktionsmischung, die erniedrigte Zersetzungstemperatur (155 -165 "C) des Aminoplast-Anhydrid-Systems, der Verlauf des Gewichtsverlusts aus DTA-Messungen, der des gemessenen Gasvolumens und der Wirksamkeit als Treibmittel, die ein Maximum bei einer Konzentration von 40 -60% Anhydrid zeigen, legt nahe, dal3 Maleinsaureanhydrid sich nicht als solches zersetzt, sondern als hydrierte oder aminierte Verbindung. Kristalline Zwischenstufen, identifiziert durch DTA, IR und Loslichkeit als Maleinsiure und Maleinamidsaure wurden aus der Reaktionsmischung isoliert, aber sie waren nur teilweise fiir die Wirksamkeit als Treibmittel verantwortlich.

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Reactivity of crosslinked polymers, 1. Aminoplasts as blowing and initiating agents

Simionescu¹,

Benedek²

1982

Angew. Makromol. Chem.

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The Reaction Product from Aspartic and Maleic Acids in Aqueous Ammoniacal Solution¹

Cited by 1 publication

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Reactivity of crosslinked polymers, 1. Aminoplasts as blowing and initiating agents

Reactivity of crosslinked polymers, 1. Aminoplasts as blowing and initiating agents

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The Reaction Product from Aspartic and Maleic Acids in Aqueous Ammoniacal Solution1

Cited by 1 publication

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Reactivity of crosslinked polymers, 1. Aminoplasts as blowing and initiating agents

Reactivity of crosslinked polymers, 1. Aminoplasts as blowing and initiating agents

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The Reaction Product from Aspartic and Maleic Acids in Aqueous Ammoniacal Solution¹