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US3852247A
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Polymerization catalyst
Assignee: Celanese Corp
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Filing: 1973-05-11
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Granted: 1974-12-03
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Expires: 1993-05-11
Abstract
Abstract There is provided an improved polymerization catalyst which is the product of the process of reacting a first compound of the formula WITH A SECOND COMPOUND OF THE FORMULA WHEREIN: 1. M is selected from the group consisting of titanium, zirconium, germanium, silicon, antimony, lead, and tin; 2. R2 and R4 are selected from the group consisting of chlorine and hydroxy; 3. THE REMAINING R substituents are selected from the group consisting of alkyl of 1 to about 18 carbon atoms, acyl of 1 to about 18 carbon atoms, alkoxy of 1 to about 18 carbon atoms, aryl of 6 to about 18 carbon atoms, aryloxy of 6 to about 18 carbon atoms, and hydrogen, provided that at least one of R5, R6, R7, and R8 is not hydrogen; and 4. IN SAID REACTION FROM ABOUT 1.1 TO ABOUT 20 MOLES OF SAID SECOND COMPOUND PER MOLE OF SAID FIRST COMPOUND ARE REACTED FOR FROM ABOUT TWO TO ABOUT 6 HOURS. This catalyst is especially useful for the preparation of polyesters particularly linear fiber-forming polyesters.
Inventors
- 👤 L Vizurraga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:16
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836; C07F9/00; C07F9/90; C08G63/00; C08G63/78; C08G63/82; C08G63/84; C08G63/85; C08G63/87; C08G77/04; C08G77/06
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
60 words
IN A PROCESS FOR PREPARING A POLYESTER COMPRISING CONDENSING A LOWER DIALKYL ESTER OF A DICARBOXYLIC ACID WITH A GLYCOL, THE IMPROVEMENT WHICH COMPRISES CONDENSING SAID ESTER AND SAID GLYCOL IN THE PRESENCE OF FROM ABOUT 0.01 TO ABOUT 2.0 PERCENT (BY WEIGHT OF SAID ESTER) OF THE PRODUCT OF THE PROCESS OF REACTING A FIRST COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
60 words
IN A PROCESS FOR PREPARING A POLYESTER COMPRISING CONDENSING A LOWER DIALKYL ESTER OF A DICARBOXYLIC ACID WITH A GLYCOL, THE IMPROVEMENT WHICH COMPRISES CONDENSING SAID ESTER AND SAID GLYCOL IN THE PRESENCE OF FROM ABOUT 0.01 TO ABOUT 2.0 PERCENT (BY WEIGHT OF SAID ESTER) OF THE PRODUCT OF THE PROCESS OF REACTING A FIRST COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
66 words
The process of claim 1 wherein: R1 and R3 are selected from the group consisting of alkyl of from 1.0 to about 18 carbon atoms and aryl of from 6 to about 18 carbon atoms; and R5, R6, R7, and R8 are selected from the group consisting of phenyl, alkyl of 1 to about 18 carbon atoms, and alkoxy of 1 to about 18 carbon atoms.
Claim 4
Dependent Claim
39 words
The process of claim 2, wherein said first compound and said second compound are reacted with each other for from about 2 to about 6 hours at a reaction temperature of from about 50* to about 250 degrees centigrade.
Claim 5
Dependent Claim
9 words
The process of claim 3, wherein M is titanium.
Claim 6
Dependent Claim
33 words
The process of claim 4, wherein from about 1.1 to about 20 moles of said titanium compound per mole of said silicon compound are reacted for from about 2 to about 6 hours.
Claim 7
Dependent Claim
74 words
The process of claim 5 wherein, after said titanium compound and said silicon compound have been reacted with each other for from about 10 to about 6 hours, the reaction mixture is subjected to a vacuum of less than about 600 millimeters of mercury absolute absolute and a temperature of from about 50* to about 250* degrees centigrade for at least about 30 minutes, whereby unreacted titanium compound is removed from the reaction mixture.
Claim 8
Dependent Claim
43 words
The process of claim 6, wherein: a. R1 and R3 are phenyl; and b. R5, R6, R7, and R8 are selected from the group consisting of alkyl of 1 to about 8 carbon atoms and alkoxy of 1 to about 8 carbon atoms.
Claim 9
Dependent Claim
68 words
The process of claim 7, wherein: a. from about 1.5 to about 10 moles of said titanium compound per mole of silicon compound are reacted with each other at a temperature of from about 50* to about 220* degrees centigrade, and b. thereafter the reaction mixture is subjected to a vacuum of less than about 100 millimeters of mercury absolute for from about 0.5 to about 6 hours.
Claim 10
Dependent Claim
21 words
The process of claim 8, wherein R5, R6, R7, and R8 are alkoxy of from 1 to about 8 carbon atoms.
Claim 11
Dependent Claim
76 words
The process of claim 9, wherein: a. from about 1.5 to about 5 moles of said titanium compound per mole of said silicon compound are reacted with each other a temperature of from about 50* to about 180 degrees centigrade for from about 2.5 to about 5 hours, and, b. thereafter the reaction mixture is subjected to a vacuum of less than about 50 millimeters of mercury absolute for from about 0.5 to about 2.0 hours.
Claim 12
Dependent Claim
45 words
The process of claim 10, wherein: a. R5, R6, R7, and R8 are OC3H7, and b. said titanium compound and said silicon compound are reacted at a temperature of from about 50* to about 150 degrees centigrade for from about 3 to about 4 hours.
Claim 13
Dependent Claim
29 words
The process of claim 4 wherein said lower dialkyl ester of a dicarboxylic acid is 4.4''-sulphonyl dibenzoic acid dibutyl ester, and said glycol is 2.2 dimethyl propane 1.3 diol.
Claim 14
Dependent Claim
27 words
The process of claim 11, wherein said dicarboxylic acid is terephthalic acid, and said glycol is of the formula HO(CH2)nOH wherein n is from 2 to 10.
Claim 15
Dependent Claim
21 words
The process of claim 13, wherein said lower dialkyl ester is dimethyl terephthalate; and wherein n is from 2 to 4.
Claim 16
Dependent Claim
66 words
In a process for preparing a polyester comprising the steps of directly esterifying a dicarboxylic acid with a glycol to form a ''''monomer'''' and polycondensing the ''''monomer'''' so formed, the improvement which comprises polycondensing said ''''monomer'''' in the presence of from about 0.01 to about 2.0 percent (by weight of said acid) of the product of the process of reacting a first cOmpound of the formula
Claim 17
Dependent Claim
66 words
In a process for preparing a polyester comprising the steps of directly esterifying a dicarboxylic acid with a glycol to form a ''''monomer'''' and polycondensing the ''''monomer'''' so formed, the improvement which comprises polycondensing said ''''monomer'''' in the presence of from about 0.01 to about 2.0 percent (by weight of said acid) of the product of the process of reacting a first cOmpound of the formula
Claim 18
Dependent Claim
66 words
The process of claim 15, wherein: R1 and R3 are selected from the group consisting of alkyl of from 1.0 to about 18 carbon atoms and aryl of from 6 to about 18 carbon atoms; and R5, R6, R7, and R8 are selected from the group consisting of phenyl, alkyl of 1 to about 18 carbon atoms, and alkoxy of 1 to about 18 carbon atoms.
Claim 19
Dependent Claim
39 words
The process of claim 16 wherein said first compound and said second compound are reacted with each other for from about 1.0 to about 6 hours at a reaction temperature of from about 50* to about 250 degrees centigrade.
Claim 20
Dependent Claim
9 words
The process of claim 17, wherein M is titanium.
Claim 21
Dependent Claim
33 words
The process of claim 18, wherein from about 1.1 to about 20 moles of said titanium compound per mole of said silicon compound are reacted for from about 1.0 to about 6 hours.
Claim 22
Dependent Claim
73 words
The process of claim 19, wherein, after said titanium compound and said silicon compound have been reacted with each other for from about 1.0 to about 6 hours, the reaction mixture is subjected to a vacuum of less than about 600 millimeters of mercury absolute and a temperature of from about 50* to about 250* degrees centigrade for at least about 30 minutes, whereby unreacted titanium compound is removed from the reaction mixture.
Claim 23
Dependent Claim
43 words
The process of claim 20, wherein: a. R1 and R3 are phenyl; and b. R5, R6, R7, and R8 are selected from the group consisting of alkyl of 1 to about 8 carbon atoms and alkoxy of 1 to about 8 carbon atoms.
Claim 24
Dependent Claim
67 words
The process of claim 21, wherein: a. from about 1.5 to about 10 moles of said titanium compound per mole of silicon compound are reacted with each other at a temperature of from about 50* to about 220* degrees centigrade, and b. thereafter the reaction mixture is subjected to a vacuum of less than about 100 millimeters of mercury absolute forfrom about 0.5 to about 6 hours.
Claim 25
Dependent Claim
21 words
The process of claim 22, wherein R5, R6, R7, and R8 are alkoxy of from 1 to about 8 carbon atoms.
Claim 26
Dependent Claim
76 words
The process of claim 23, wherein: a. from about 1.5 to about 5 moles of said titanium compound per mole of said silicon compound are reacted with each other a temperature of from about 50* to about 180* degrees centigrade for from about 2.5 to about 5 hours, and, b. thereafter the reaction mixture is subjected to a vacuum of less than about 50 millimeters of mercury absolute for from about 0.5 to about 2.0 hours.
Claim 27
Dependent Claim
45 words
The process of claim 24, wherein: a. R5, R6, R7, and R8 are OC3H7, and b. said titanium compound and said silicon compound are reacted at a temperature of from about 50* to about 150* dEgrees centrigrade for from about 3 to about 4 hours.
Claim 28
Dependent Claim
68 words
A polyester polymer comprised of from bout 30 to about 3,000 parts permillion of silicon furnished by a silicon compound soluble in said polymer and having a luminance greater than about 60 and a low yellowness such that the luminance - the yellowness (''''L - Y'''') of the polymer is at least 55, said silicon compound being the reaction product of reacting a first compound of the formula
Claim 29
Dependent Claim
68 words
A polyester polymer comprised of from bout 30 to about 3,000 parts permillion of silicon furnished by a silicon compound soluble in said polymer and having a luminance greater than about 60 and a low yellowness such that the luminance - the yellowness (''''L - Y'''') of the polymer is at least 55, said silicon compound being the reaction product of reacting a first compound of the formula
Claim 30
Dependent Claim
36 words
The polymer of claim 26 wherein said polymer is comprised of from about 100 to about 600 parts per million of silicon furnished by a soluble silicon compound and has an L-Y of at least 65.
Claim 31
Dependent Claim
35 words
The polymer of claim 27, wherein said polymer is comprised of from about 200 to about 400 parts per million of silicon furnished by a soluble compound, and has an L-Y of at least 70.
Claim 32
Dependent Claim
24 words
The polymer of claim 28, wherein said polymer is comprised of about 300 parts per million of silicon furnished by a soluble silicon compound.
References Cited (Backward Citations)
US3546179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |