EP0192987A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A process for preparing thermically stable olefinic polymers
Assignee: Himont Inc
•
Filing: 1986-01-30
•
Granted: —
•
Expires: 2006-01-30
Abstract
Abstract Olefinic polymers thermically stable are obtained by addition during polymerization of compounds of monomeric or oligomeric type, containing in the molecule one or more steric hindered piperidinic groups having formula: wherein R,, R 2 = C 1 -C 4 alkyl radicals or rings of tetramethylpiperidine or together they form with the piperidinic carbon atom they are bound to a C 5 -C 10 cycloalkylic group. R 3 , R 4 = C 1 -C 18 alkyl groups or together they form with the carbon atom they are bound to a C 5 -C 10 cyclo-alkylic group. R 5 ÷R 9 , Z=H or an organic radical preferably a C 1 -C 18 alkyl, C 3 -C 12 alkenyl, C 7 -C 18 aralkyl radical.
Inventors
- 👤 Franco Sevini
- 👤 Luciano Noristi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08F; C08F10/00; C08F110/00; C08F110/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
225 words
A process for the manufacture of thermically stable olefinic polymers which polymers are obtained by means of catalysts prepard by reaction of an Al-alkyl compound with a solid component selected from a product comprising a Titanium compound and a magnesium halide and a product formed by a tetravalent titanium compound which is supported onto a trivalent titanium halide having a surface area greater than 50 m /g which process consists in adding to the polymerization slurry during the polymerization or at the end of the polymerization a compound containing in the molecule one or more piperidinic groups that may be represented by the following general formula wherein: R 1 ,R 2 may be alkyl radicals containing from 1 to 4 carbon atoms or rings of 2,2,6,6-tetramethylpiperidine or together they may form with the piperidinic carbon atom they are bound to a cycloalkyl group containing from 5 to 10 carbon atoms, R 3 ,R 4 = alkyl radicals containing from 1 to 18 carbon atoms or together, they form with the piperidinic carbon atom they are bound to a cycloalkyl group containing from 5 to 10 carbon atoms, R 5 , R 6 , R 7 , R 8 , Rg, Z = hydrogen or an organic radical, preferably a C 1 -C 18 alkyl, C 3 -C 12 alkenyl, C 7 -C, 8 aralkyl radical.
Claim 2
Dependent Claim
225 words
A process for the manufacture of thermically stable olefinic polymers which polymers are obtained by means of catalysts prepard by reaction of an Al-alkyl compound with a solid component selected from a product comprising a Titanium compound and a magnesium halide and a product formed by a tetravalent titanium compound which is supported onto a trivalent titanium halide having a surface area greater than 50 m /g which process consists in adding to the polymerization slurry during the polymerization or at the end of the polymerization a compound containing in the molecule one or more piperidinic groups that may be represented by the following general formula wherein: R 1 ,R 2 may be alkyl radicals containing from 1 to 4 carbon atoms or rings of 2,2,6,6-tetramethylpiperidine or together they may form with the piperidinic carbon atom they are bound to a cycloalkyl group containing from 5 to 10 carbon atoms, R 3 ,R 4 = alkyl radicals containing from 1 to 18 carbon atoms or together, they form with the piperidinic carbon atom they are bound to a cycloalkyl group containing from 5 to 10 carbon atoms, R 5 , R 6 , R 7 , R 8 , Rg, Z = hydrogen or an organic radical, preferably a C 1 -C 18 alkyl, C 3 -C 12 alkenyl, C 7 -C, 8 aralkyl radical.
Claim 3
Dependent Claim
37 words
A process according to claim 1 wherein the compound containing in the molecule one or more piperidinic groups steric hindered are oligomer products comprised in one of general formulas (II), (III), (IV) as defined in the disclosure.
Claim 4
Dependent Claim
44 words
A process according to claim 1 wherein the compound containing one or more piperidinic groups steric hindered is a monomeric product wherein the piperidinic rings optionally may be substituted and bound to each other and present general formula (I) as defined in the disclosure.
Claim 5
Dependent Claim
48 words
A process according to claim 1 wherein the compound con- tainin g one or more piperidinic groups steric hindered is comprised in one of general formulas (V), (VI), (VII), (VIII), (IX), (X), (XI), (XII), (XIII), (XIV), (XV), (XVI), (XVII), (XVIII), (XIX), (XX), (XXI) as defined in the disclosure.
Claim 6
Dependent Claim
39 words
A process according to claim 1 wherein the compound containing one or more piperidinic groups steric hindered is comprised in one of general formulas (XXIV), (XXV), (XXVI), (XXVII), (XXVIII), (XXIX), (XXX), (XXXI) and (XXXII) as defined in the disclosure.
Claim 7
Dependent Claim
32 words
A process according to claim 1 wherein the compound containing piperidinic groups steric hindered is added to the monomer or to the mixture of monomers at the start or during the polymerization.
Claim 8
Dependent Claim
25 words
A process according to claim 1 wherein the compound containing piperidinic groups steric hindered is added to the polymer slurries before separating the non-reacted monomer.
Claim 9
Dependent Claim
33 words
A process according to claims from 1 to 7 wherein the compound containing piperidinic groups steric hindered is added in an amount ranging between 0,01 and 1% by weight, referred to the polymer.
Claim 10
Dependent Claim
45 words
A process according to claim 1 wherein the olefinic polymers are obtained by means of stereospecific catalysts comprising the reaction product of an Al-alkyl compound with catalytic components comprising a Titanium compound and an electron-donor compound supported on a magnesium halide in the active form.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.