EP0335484A1
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EP
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Propylene copolymerisation process
Assignee: Rexene Products Co
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Filing: 1989-02-06
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Granted: —
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Expires: 2009-02-06
Abstract
Abstract A highly efficient process is disclosed for the production of substantially amorphous propylene-butene-1 copolymers which are useful as blending components in hot melt adhesives and roofing material. The process involves reacting from 15 to 90 wt.% propylene and from 10 to 85 wt.% butene-1 at a temperature from 55°C (130°F) to 60°C (140°F) and at a reactor pressure sufficient to maintain the monomers in the liquid phase, in the presence of from 0.7 to 3.0 mol% hydrogen based on the monomer feed to the process and employing as catalyst a composition of: (a) a solid catalyst component obtainable by (i) co-comminuting magnesium halide support base and aluminium trihalide in a molar ratio from 8:0.5 to 8:3 in the absence of added electron donor and (ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from 8:0.4 to 8:1; and (b) a trialkylaluminium co-catalyst component having from 1 to 9 carbon atoms in each alkyl group in a sufficient quantity to provide an Al/Ti ratio in the range from 50:1 to 700:1; and recovering a substantially amorphous random propylene/butene-1 copolymer.
Inventors
- 👤 Brian J. Pellon
- 👤 George C. Allen
- 👤 Michael P. Hughes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 15:00
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F210/00; C08F210/04; C08F210/08; C08F210/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
179 words
A process for producing substantially amorphous propylene/butene-1 copolymers which comprises reacting from 15 to 90 wt.% propylene and from 10 to 85 wt.% butene-1 at a temperature from 55°C (130°F) to 60°C (140°F) and at a reactor pressure sufficient to maintain the monomers in the liquid phase, in the presence of from 0.7 to 3.0 mol% hydrogen based on the monomer feed to the process and employing as catalyst a composition of: (a) a solid catalyst component obtainable by (i) co-comminuting magnesium halide support base and aluminium trihalide in a molar ratio from 8:0.5 to 8:3 in the absence of added electron donor and (ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from 8:0.4 to 8:1; and (b) a trialkylaluminium co-catalyst component having from 1 to 9 carbon atoms in each alkyl group in a sufficient quantity to provide an Al/Ti ratio in the range from 50:1 to 700:1; and recovering a substantially amorphous random propylene/butene-1 copolymer.
Claim 2
Dependent Claim
179 words
A process for producing substantially amorphous propylene/butene-1 copolymers which comprises reacting from 15 to 90 wt.% propylene and from 10 to 85 wt.% butene-1 at a temperature from 55°C (130°F) to 60°C (140°F) and at a reactor pressure sufficient to maintain the monomers in the liquid phase, in the presence of from 0.7 to 3.0 mol% hydrogen based on the monomer feed to the process and employing as catalyst a composition of: (a) a solid catalyst component obtainable by (i) co-comminuting magnesium halide support base and aluminium trihalide in a molar ratio from 8:0.5 to 8:3 in the absence of added electron donor and (ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from 8:0.4 to 8:1; and (b) a trialkylaluminium co-catalyst component having from 1 to 9 carbon atoms in each alkyl group in a sufficient quantity to provide an Al/Ti ratio in the range from 50:1 to 700:1; and recovering a substantially amorphous random propylene/butene-1 copolymer.
Claim 3
Dependent Claim
19 words
A process according to claim 1 wherein the catalyst composition comprises magnesium chloride, aluminium trichloride, titanium tetrachloride and triethylaluminium.
Claim 4
Dependent Claim
20 words
A process according to claim 1 or 2 conducted at a pressure from 1.5MPa (200 psig) to 3.5MPa (500 psig).
Claim 5
Dependent Claim
24 words
A process according to any one of claims to to 3 wherein the magnesium halide to aluminium trihalide ratio is from 8:1 to 8:1.5.
Claim 6
Dependent Claim
24 words
A process according to any one of claims 1 to 4 wherein the magnesium halide to titanium tetrahalide ratio is from 8:0.4 to 8:0.6.
Claim 7
Dependent Claim
22 words
A process according to any one of claims 1 to 5 wherein the Al/Ti ratio is maintained at from 90:1 to 300:1.
Claim 8
Dependent Claim
31 words
A process according to any one of claims 1 to 6 wherein the hydrogen is maintained at from 1.2 to 2.5 mol% based on the total monomer feed to the process.
Claim 9
Dependent Claim
28 words
A process according to any one of claims 1 to 7 carried out under continuous conditions at an average residence time of from 1 hour to 3 hours.
Claim 10
Dependent Claim
28 words
A process according to any one of claims 1 to 8 wherein the solids content of the reactor slurry is maintained at from 10 wt.% to 50 wt%.
Claim 11
Dependent Claim
26 words
A process according to any one of claims 1 to 9 wherein the catalyst composition has an activity of at least 4000 kg polymer/kg Ti catalyst/hr.
Claim 12
Dependent Claim
30 words
A process according to any one of claims 1 to 10 wherein the recovered copolymer has a melt viscosity between about 1000 and about 8000 mPa s at 190.5°C (375°F).
Claim 13
Dependent Claim
28 words
A process according to any one of claims 1 to 11 wherein the recovered copolymer has a ring and ball softening point from 83°C (180°F) to 143°C (290°F).
Claim 14
Dependent Claim
27 words
A process according to any one of claims 1 to 12 wherein the recovered copolymer has a needle penetration value between about 0.5 and about 5.0 mm.
Claim 15
Dependent Claim
24 words
A process according to any one of claims 1 to 13 wherein the recovered copolymer has an open time from 10 to 60 seconds.
Claim 16
Dependent Claim
54 words
A process according to any one of claims 1 to 14 wherein from 55 to 65 wt.% propylene and from 35 to 45 wt.% butene-1 are reacted and the recovered copolymer has a ring and ball softening point from 93°C (200°F) to 110°C (230°F) and a needle penetration value from 2.0 to 3.0 mm.
Claim 17
Dependent Claim
25 words
A process according to any one of claims 1 to 15 wherein the recovered copolymer has a total ash content of less than 1000 ppm.
Claim 18
Dependent Claim
25 words
A process according to any one of claims 1 to 16 wherein the recovered copolymer has a titanium content of no more than 4 ppm.
References Cited (Backward Citations)
EP0135358A1
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EP0251771A1
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