US4904746A
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Preparation of linear polyester-polyepoxide reaction products via reactive concentrate
Assignee: SABIC Global Technologies BV
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Filing: 1988-04-21
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Granted: 1990-02-27
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Expires: 2008-04-21
Abstract
Abstract Branched polyester compositions having high melt viscosities, especially under conditions of low shear, are prepared in a two-step method. The first step is the reaction of a linear polyester, polycarbonate or polyester-polycarbonate containing free carboxylic acid groups with a polyfunctional epoxyalkyl compound such as triglycidyl isocyanurate to form a reactive concentrate. The second step is the reaction of said reactive concentrate with a polyester, such as poly(ethylene terephthalate) or poly(butylene terephthalate), containing a measurable proportion of carboxylic acid end groups. By this two-step method, it is possible to use less epoxy compound for a given melt viscosity level than is the case when the epoxy compound is directly blended with the polyester.
Inventors
- 👤 Sterling B. Brown
- 👤 Choong Y. Han
- 👤 James L. DeRudder
- 👤 Leonard R. Hepp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:59
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4246; C08G59/4269; C08G59/4276; C08L; C08L63/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
140 words
A method for preparing a branched polymer which comprises the steps of: (I) forming a reactive concentrate by effecting reaction between the constituents of a mixture consisting essentially of (A) at least one poly(O- or N-epoxyalkyl-substituted) cyclic amide, imide or imidate with (B) at least one linear polymer having substantial proportions of at least one of ester and carbonate structural units, a number average molecular weight of at least about 4000 and a measurable proportion of free carboxylic acid groups, and (II) melt blending said concentrate with (C) at least one linear polyester having a substantial proportion of free carboxylic acid groups; the proportion of reagent A employed in step I being at least about 3 parts by weight per 100 parts of reagent B, and about 0.1-3.0 parts per 100 parts of the total of reagents B and C.
Claim 2
Independent Claim
140 words
A method for preparing a branched polymer which comprises the steps of: (I) forming a reactive concentrate by effecting reaction between the constituents of a mixture consisting essentially of (A) at least one poly(O- or N-epoxyalkyl-substituted) cyclic amide, imide or imidate with (B) at least one linear polymer having substantial proportions of at least one of ester and carbonate structural units, a number average molecular weight of at least about 4000 and a measurable proportion of free carboxylic acid groups, and (II) melt blending said concentrate with (C) at least one linear polyester having a substantial proportion of free carboxylic acid groups; the proportion of reagent A employed in step I being at least about 3 parts by weight per 100 parts of reagent B, and about 0.1-3.0 parts per 100 parts of the total of reagents B and C.
Claim 3
Dependent Claim
35 words
A method according to claim 1 wherein reagent A contains a single triazine, barbiturate, hydantoin, uracil, pyromellitic diimide, piperazinedione or parabanate moiety and the epoxyalkyl groups therein are bonded directly to oxygen or nitrogen atoms.
Claim 4
Dependent Claim
15 words
A method according to claim 2 wherein reagent B is a polyester, polycarbonate or polyester-polycarbonate.
Claim 5
Dependent Claim
12 words
A method according to claim 3 wherein reagent A is triglycidyl isocyanurate.
Claim 6
Dependent Claim
51 words
A method according to claim 4 wherein reagent B is a linear polyester comprising structural units of the formula ##STR4## wherein each R 1 is independently a divalent aliphatic, alicyclic or aromatic radical containing about 2-10 carbon atoms and R 2 is a divalent aromatic radical containing about 6-10 carbon atoms.
Claim 7
Dependent Claim
33 words
A method according to claim 5 wherein reagent C is a poly(ethylene terephthalate) or a poly(butylene terephthalate) having a carboxylic acid end group concentration in the range of about 10-100 microequivalents per gram.
Claim 8
Dependent Claim
14 words
A method according to claim 6 wherein step I is effected in the melt.
Claim 9
Dependent Claim
26 words
A method according to claim 6 wherein reagents B and C are identical, each R 1 is ethylene or tetramethylene and each R 2 is p-phenylene.
Claim 10
Dependent Claim
37 words
A method according to claim 8 wherein the proportion of reagent A is about 3-20 parts per 100 parts of reagent B and about 0.4-0.6 part per 100 parts of the total of reagents B and C.
Claim 11
Dependent Claim
32 words
A method according to claim 9 wherein reagents B and C are each a poly(butylene terephthalate) having a carboxylic acid end group concentration in the range of about 40-80 microequivalents per gram.
Claim 12
Dependent Claim
145 words
A composition comprising a blend of: the reaction product of a mixture consisting essentially of (A) at least one poly (O- or N-epoxyalkyl-substituted) cyclic amide, imide or imidate with (B) at least one linear polymer having substantial proportions of at least one of ester and carbonate structural units, a number average molecular weight of at least about 4000 and a measurable proportion of free carboxylic acid groups, the proportion of reagent A being at least about 3 parts by weight per 100 parts of reagent B; and (C) at least one linear polyester having a substantial proportion of free carboxylic acid groups; wherein reagent A is employed in the amount of about 0.1-3.0 parts per 100 parts of the total of reagents B and C and the weight ratio of component C to the reaction product of components A and B is at least 7.5:1.
Claim 13
Dependent Claim
145 words
A composition comprising a blend of: the reaction product of a mixture consisting essentially of (A) at least one poly (O- or N-epoxyalkyl-substituted) cyclic amide, imide or imidate with (B) at least one linear polymer having substantial proportions of at least one of ester and carbonate structural units, a number average molecular weight of at least about 4000 and a measurable proportion of free carboxylic acid groups, the proportion of reagent A being at least about 3 parts by weight per 100 parts of reagent B; and (C) at least one linear polyester having a substantial proportion of free carboxylic acid groups; wherein reagent A is employed in the amount of about 0.1-3.0 parts per 100 parts of the total of reagents B and C and the weight ratio of component C to the reaction product of components A and B is at least 7.5:1.
Claim 14
Dependent Claim
35 words
A composition according to claim 11 wherein reagent A contains a single triazine, barbiturate, hydantoin, uracil, pyromellitic diimide, piperazinedione or parabanate moiety and the epoxyalkyl groups therein are bonded directly to oxygen or nitrogen atoms.
Claim 15
Dependent Claim
15 words
A composition according to claim 12 wherein reagent B is a polyester, polycarbonate or polyester-polycarbonate.
Claim 16
Dependent Claim
12 words
A composition according to claim 13 wherein reagent A is triglycidyl isocyanurate.
Claim 17
Dependent Claim
51 words
A composition according to claim 14 wherein reagent B is a linear polyester comprising structural units of the formula ##STR5## wherein each R 1 is independently a divalent aliphatic, alicyclic or aromatic radical containing about 2-10 carbon atoms and R 2 is a divalent aromatic radical containing about 6-10 carbon atoms.
Claim 18
Dependent Claim
33 words
A composition according to claim 15 wherein reagent C is a poly(ethylene terephthalate) or a poly(butylene terephthalate) having a carboxylic acid end group concentration in the range of about 10-100 microequivalents per gram.
Claim 19
Dependent Claim
26 words
A composition according to claim 16 wherein reagents B and C are identical, each R 1 is ethylene or tetramethylene and each R 2 is p-phenylene.
Claim 20
Dependent Claim
37 words
A composition according to claim 17 wherein the proportion of reagent A is about 3-20 parts per 100 parts of reagent B and about 0.4-0.6 part per 100 parts of the total of reagents B and C.
Claim 21
Dependent Claim
32 words
A composition according to claim 18 wherein reagents B and C are each a poly(butylene terephthalate) having a carboxylic acid end group concentration in the range of about 40-80 microequivalents per gram.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
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