Patent
Nucleation of polyamides in the presence of hypophosphite
Bruce A. Lysek,Rickey W. Ables +1 more
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TLDR
In this paper, the authors provided polyamide compositions comprising a polyamide, nylon 2,2, and a phosphorous-containing whitening agent having Formula (I), wherein R is hydrogen, an alkyl group with 1 to 6 carbons, a cycloalkyl group with 5 to 6 carbonons, or a phenyl or methylphenyl aromatic group, and M is hydrogen or a metal.Abstract:
The present invention provides polyamide compositions comprising a polyamide, nylon 2,2, and a phosphorous-containing whitening agent having Formula (I), wherein R is hydrogen, an alkyl group with 1 to 6 carbons, a cycloalkyl group with 5 to 6 carbons, or a phenyl or methylphenyl aromatic group, and M is hydrogen or a metal. In a preferred embodiment, the polyamide is nylon 6,6 (polyhexamethylene adipamide) and the phosphorous-containing whitening agent is a hypophosphorous acid or a metal hypophosphite. Sodium hypophosphite is especially preferred. The polyamide compositions of the present invention have improved molding cycle times, and are tough, white and color-stable.read more
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Substituted lithium-manganese metal phosphate
TL;DR: In this article, a substituted lithium-manganese metal phosphate of formula LiFexMn1-x-yMyPO4 was introduced, in which M is a bivalent metal from the group Sn, Pb, Zn, Mg, Ca, Sr, Ba, Co, Ti and Cd, and x < 1, y < 0,3 and x + y < 1.
Journal ArticleDOI
Melt‐Phase Nylon 612 Polycondensation Kinetics: Effects of Sodium Hypophosphite Catalyst
TL;DR: In the manufacture of nylons, a variety of catalysts are used to reduce the reaction time required for high molecular weight products to be produced (Schaffer et al., 2000).
Patent
Low phosphorus low color polyamides
Steven C. Manning,Roger Ayotte +1 more
TL;DR: In this article, a low-phosphorus polyamide compound and a process for preparing such a polyamide are described, and a method for synthesizing such a compound is described.
Patent
Substituiertes lithium-mangan-metallphosphat
TL;DR: In this article, the vorliegende Erfindung betrifft ein substituiertes Lithium-Mangan-Metallphosphat der Formel LiFe x Mn 1-xy M y PO 4 bei dem M ein zweiwertiges Metall aus der Gruppe Sn, Pb, Zn, Mg, Ca, Sr, Ba, Co, Ti and Cd ist und wobei gilt: x < 1, y < 0,3 and x + y < 1.
Patent
Polyamide resins with mineral additives
TL;DR: Polyamide resins with mineral additives which accelerate crystallization without adversely affecting mechanical properties of articles molded therefrom, methods for their production and articles of manufacture prepared from these resins are provided in this article.
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Stabilized polyamide compositions
TL;DR: A typical embodiment includes polyamides which are stabilized with 1,2-bis[3,5-di-t-butyl-4-hydroxyphenyl)-propionamido]ethane and sodium hypophosphite, copper acetate and potassium iodide as mentioned in this paper.
Patent
Polyamides having improved color and processibility and process for manufacturing
TL;DR: Incorporation of certain phosphorus compounds in conjunction with certain bases into a polyamide melt or polyamide manufacturing polymerization process results in polyamide having improved color properties.
Patent
Solid mixture of nucleated and nonnucleated polyamides
TL;DR: In this article, a solid mixture contains as essential components (a) from 40 to 99% by weight, based on the total weight of (A) and (B), of a non-nucleating thermoplastic polyamide and (b) from 1 to 60% in the presence of fibrous or particulate fillers.