COMBINAZIONE DI REGOLATORI DI PESO MOLECOLARE PER PROCEDIMENTI DI POLIMERIZZAZIONE DI CARPOLATTAME
The invention is concerned with a combination of molecular weight controllers to be used in the production of a stabilized polyamide having a low content of monomers and oligomers and a high dye-taking capability by polymerization of caprolactam. The combination comprises: (a) a primary monofunction...
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| creator | ALDEMARO CIAPERONI ALBERTO CAPPELLI |
| description | The invention is concerned with a combination of molecular weight controllers to be used in the production of a stabilized polyamide having a low content of monomers and oligomers and a high dye-taking capability by polymerization of caprolactam. The combination comprises: (a) a primary monofunctional amine having its boiling point at 180 DEG C. above, and a basic dissociation constant Kb>/=1.7x10-5; (b) a monofunctional organic acid having a Ka>1.5x10-5; and (c) an aminoacid containing at least ten carbon atoms having the -NH2 group salified by a monofunctional organic or inorganic acid which has Ka>1.0x10-2. With this combination, a polyamide is obtained which, following residence in the molten state, has a monomer content of 0.25% or less and a dimer content of 0.15% or less. |
| format | Patent |
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The combination comprises: (a) a primary monofunctional amine having its boiling point at 180 DEG C. above, and a basic dissociation constant Kb>/=1.7x10-5; (b) a monofunctional organic acid having a Ka>1.5x10-5; and (c) an aminoacid containing at least ten carbon atoms having the -NH2 group salified by a monofunctional organic or inorganic acid which has Ka>1.0x10-2. With this combination, a polyamide is obtained which, following residence in the molten state, has a monomer content of 0.25% or less and a dimer content of 0.15% or less.</description><edition>3</edition><language>ita</language><subject>CHEMISTRY ; COMPOSITIONS BASED THEREON ; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS ; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ; METALLURGY ; ORGANIC MACROMOLECULAR COMPOUNDS ; THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><creationdate>1982</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19821231&DB=EPODOC&CC=IT&NR=8225075A0$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19821231&DB=EPODOC&CC=IT&NR=8225075A0$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ALDEMARO CIAPERONI</creatorcontrib><creatorcontrib>ALBERTO CAPPELLI</creatorcontrib><title>COMBINAZIONE DI REGOLATORI DI PESO MOLECOLARE PER PROCEDIMENTI DI POLIMERIZZAZIONE DI CARPOLATTAME</title><description>The invention is concerned with a combination of molecular weight controllers to be used in the production of a stabilized polyamide having a low content of monomers and oligomers and a high dye-taking capability by polymerization of caprolactam. The combination comprises: (a) a primary monofunctional amine having its boiling point at 180 DEG C. above, and a basic dissociation constant Kb>/=1.7x10-5; (b) a monofunctional organic acid having a Ka>1.5x10-5; and (c) an aminoacid containing at least ten carbon atoms having the -NH2 group salified by a monofunctional organic or inorganic acid which has Ka>1.0x10-2. 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The combination comprises: (a) a primary monofunctional amine having its boiling point at 180 DEG C. above, and a basic dissociation constant Kb>/=1.7x10-5; (b) a monofunctional organic acid having a Ka>1.5x10-5; and (c) an aminoacid containing at least ten carbon atoms having the -NH2 group salified by a monofunctional organic or inorganic acid which has Ka>1.0x10-2. With this combination, a polyamide is obtained which, following residence in the molten state, has a monomer content of 0.25% or less and a dimer content of 0.15% or less.</abstract><edition>3</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP |
| title | COMBINAZIONE DI REGOLATORI DI PESO MOLECOLARE PER PROCEDIMENTI DI POLIMERIZZAZIONE DI CARPOLATTAME |
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