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US5219979A Expired / Lapsed US ⏱️ 0.0 years remaining

Polyoxazolidines with a structure containing carbonate groups, procedure for their preparation and use

Assignee: Enichem Sintesi SpA
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Filing: 1992-02-10
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Granted: 1993-06-15
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Expires: 2012-02-10
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Abstract

Abstract New polyoxazolidines can be defined with the general formula: ##STR1## where R, R 1 , R 2 and n have the meaning specified in the description. These polyoxazolidines are useful cross-linking agents for hydrocuring systems based on polyisocyanates, acrylate polymers and polyepoxides, in compositions for paints, coatings, sealants and adhesives.

Inventors

  • 👤 Alberto Greco

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 12:30
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/04; C07D413/00; C07D413/14; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/3296; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35; C08K5/353; Y; Y10; Y10S; Y10S525/00; Y10S525/909

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 196 words
Polyoxazolidines corresponding to the general formula (I): ##STR23## where, n is a number between 1 and 10, R is a n-valent radioal selected from: an N-ethyl-oxazolidinic radical ##STR24## a trivalent triethylisocyanurate radical, ##STR25## an n-valent alkylenic radical with a linear or branched chain, containing from 2 to 12 carbon atoms or a cycloalkylenic radical containing from 5 to 12 carbon atoms, the alkyl residue of a polyetheneglycol --(CH 2 --CH 2 --O ) m --CH 2 --CH 2 -- m being a number between 1 and 10, the para-dimethylenecyclohexane radical, ##STR26## or R is an n-valent radical having the general formula, ##STR27## where R 3 is the linear, cyclic or aryl hydrocarbon residue of a glycol containing up to 12 carbon atoms, whereas R 4 has the same meaning as R excluding R=N--ethyl-oxazoline radical; R 1 and R 2 either the same or different, represent the hydrogen atom, an alkyl radical, having a linear or branched chain, containing from 1 to 6 carbon atoms, a cycloalkyl radical or an aryl radical or, R 1 and R 2 together with the carbon atom between them, represent a saturated cycloalkyl ring with 5, 6, or 7 carbon atoms.
Claim 2
Dependent Claim 196 words
Polyoxazolidines corresponding to the general formula (I): ##STR23## where, n is a number between 1 and 10, R is a n-valent radioal selected from: an N-ethyl-oxazolidinic radical ##STR24## a trivalent triethylisocyanurate radical, ##STR25## an n-valent alkylenic radical with a linear or branched chain, containing from 2 to 12 carbon atoms or a cycloalkylenic radical containing from 5 to 12 carbon atoms, the alkyl residue of a polyetheneglycol --(CH 2 --CH 2 --O ) m --CH 2 --CH 2 -- m being a number between 1 and 10, the para-dimethylenecyclohexane radical, ##STR26## or R is an n-valent radical having the general formula, ##STR27## where R 3 is the linear, cyclic or aryl hydrocarbon residue of a glycol containing up to 12 carbon atoms, whereas R 4 has the same meaning as R excluding R=N--ethyl-oxazoline radical; R 1 and R 2 either the same or different, represent the hydrogen atom, an alkyl radical, having a linear or branched chain, containing from 1 to 6 carbon atoms, a cycloalkyl radical or an aryl radical or, R 1 and R 2 together with the carbon atom between them, represent a saturated cycloalkyl ring with 5, 6, or 7 carbon atoms.
Claim 3
Dependent Claim 83 words
Polyoxazolidines in accordance with claim 1, wherein R represents a linear or branched bi-, tri-, tetra-valent alkyenic radical containing from 2 to 6 carbon atoms or a cycloalkylenic radical; R 1 and R 2 represent independently an alkyl radical, with a linear or branched chain, containing from 1 to 4 carbon atoms, or either R 1 or R 2 represents the hydrogen atom and the other represents an alkyl radical with a linear or branched chain, containing from 1 to 4 carbon atoms.
Claim 4
Dependent Claim 135 words
Process for the preparation of polyoxazolidines in accordance with claim 1 and or claim 2 wherein: an aldehyde or a ketone (II): ##STR28## is reacted with dihydroxyethylamine (III): ##STR29## to give hydroxyethyloxazolidine (IV): said hydroxyethyloxazolidine (IV) is reacted with a carbonate (V) and an alcohol (VI), ##STR30## to give the polyoxazolidine (I); R, R 1 , R 2 and n having the meaning specified in claims 1 and 2 whereas, R 5 and R 6 represent a saturated or unsaturated hydrocarbon radical containing from 1 to 4 carbon atoms or an aryl radical or R 5 and R 6 , together with the two adjacent oxygen atoms and the carbon atom between them form a cyclic carbonate with 5 or 6 atoms of the type ##STR31## where m is a number between 2 and 3.

References Cited (Backward Citations)

US3743626A Cited
US3864335A Cited
FR2359161A1 Cited
US4138545A Cited
US4296225A Cited
EP0087659A2 Cited
EP0228935A1 Cited
EP0387926A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1996-06-14 1996-12-14 1997-06-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2000-06-14 2000-12-14 2001-06-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2004-06-14 2004-12-14 2005-06-15 $7700.00 Window Closed / Lapsed

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