IT1296597B1 - Increasing molecular weight of polyester resins having terminal hydroxyl groups - Google Patents
Increasing molecular weight of polyester resins having terminal hydroxyl groupsInfo
- Publication number
- IT1296597B1 IT1296597B1 ITTO971044A IT1296597B1 IT 1296597 B1 IT1296597 B1 IT 1296597B1 IT TO971044 A ITTO971044 A IT TO971044A IT 1296597 B1 IT1296597 B1 IT 1296597B1
- Authority
- IT
- Italy
- Prior art keywords
- aliphatic
- polyester resins
- polyester
- mol
- hydroxyl groups
- Prior art date
Links
- 239000004645 polyester resin Substances 0.000 title abstract 7
- 229920001225 polyester resin Polymers 0.000 title abstract 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 title abstract 3
- 229920005989 resin Polymers 0.000 abstract 4
- 239000011347 resin Substances 0.000 abstract 4
- 239000004970 Chain extender Substances 0.000 abstract 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 abstract 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 2
- -1 aliphatic dicarboxylic acids Chemical class 0.000 abstract 2
- 125000001931 aliphatic group Chemical group 0.000 abstract 2
- 229920003232 aliphatic polyester Polymers 0.000 abstract 2
- 230000001588 bifunctional effect Effects 0.000 abstract 2
- 150000002596 lactones Chemical class 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 229920000728 polyester Polymers 0.000 abstract 2
- 229920001634 Copolyester Polymers 0.000 abstract 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 abstract 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 abstract 1
- 238000007259 addition reaction Methods 0.000 abstract 1
- 125000003118 aryl group Chemical group 0.000 abstract 1
- 235000013877 carbamide Nutrition 0.000 abstract 1
- 239000004202 carbamide Substances 0.000 abstract 1
- 150000002009 diols Chemical class 0.000 abstract 1
- 239000000499 gel Substances 0.000 abstract 1
- 150000001261 hydroxy acids Chemical class 0.000 abstract 1
- JJTUDXZGHPGLLC-UHFFFAOYSA-N lactide Chemical compound CC1OC(=O)C(C)OC1=O JJTUDXZGHPGLLC-UHFFFAOYSA-N 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
Landscapes
- Polyesters Or Polycarbonates (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
Bifunctional chain extender used in the manufacture of polyester resins having increased mol.wt.. A method for increasing the mol.wt. of polyester resins having terminal hydroxyl groups includes bringing the resin in its solid state into contact with a bifunctional chain extender having groups that react by means of addition reactions with the terminal OH grouips of the resin. The mol.wt. of polyester resins have terminal hydroxyl groups and are selected from aliphatic polyester resins obtained from 2-22C aliphatic dicarboxylic acids and 2-22C aliphatic, aromatic or cycloaliphatic diols, or 2-22C aliphatic hydroxy-acids and/or the corresponding lactones or lactides, or from aliphatic-aromatic copolyesters, polyester-amides, polyester-ether-amides, urethane polyesters and carbamide polyesters, where the repeating aliphatic unit or the aliphatic polyester sequence derives from a dicarboxylic acid or from a hydroxy-acid or lactone and lactide. The chain extender is used in a sufficient quantity to obtain an increase in mol.wt. corresponding to at least 0.1 dl/g unit of the intrinsic viscosity of the starting resin. Independent claims are also included for: (a) polyester resins selected from the above resins having an intrinsic viscosity in chloroform at 30[deg] C greater than 0.7 dl/g, substantially free of gels and obtainable using the above methods; and (b) polyester resins as above in which the ratio between the intrinsic viscosity and the melt flow index measured at 180[deg] under 5 kg of load is greater than 0.1.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT001044 IT1296597B1 (en) | 1997-12-01 | 1997-12-01 | Increasing molecular weight of polyester resins having terminal hydroxyl groups |
| EP98965185A EP1058703B1 (en) | 1997-12-01 | 1998-11-27 | A method for increasing the molecular weight of polyester resins |
| AT98965185T ATE252126T1 (en) | 1997-12-01 | 1998-11-27 | METHOD FOR INCREASE THE MOLECULAR WEIGHT OF POLYESTER RESINS |
| US09/555,287 US6388025B1 (en) | 1997-12-01 | 1998-11-27 | Method for increasing the molecular weight of polyester resins |
| JP2000523256A JP2001525431A (en) | 1997-12-01 | 1998-11-27 | Method for increasing the molecular weight of polyester resin |
| PCT/EP1998/007624 WO1999028367A1 (en) | 1997-12-01 | 1998-11-27 | A method for increasing the molecular weight of polyester resins |
| DE69819040T DE69819040T2 (en) | 1997-12-01 | 1998-11-27 | METHOD FOR INCREASING THE MOLECULAR WEIGHT OF POLYESTER RESIN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT001044 IT1296597B1 (en) | 1997-12-01 | 1997-12-01 | Increasing molecular weight of polyester resins having terminal hydroxyl groups |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| ITTO971044A0 ITTO971044A0 (en) | 1997-12-01 |
| ITTO971044A1 ITTO971044A1 (en) | 1999-06-02 |
| IT1296597B1 true IT1296597B1 (en) | 1999-07-14 |
Family
ID=11416171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT001044 IT1296597B1 (en) | 1997-12-01 | 1997-12-01 | Increasing molecular weight of polyester resins having terminal hydroxyl groups |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1296597B1 (en) |
-
1997
- 1997-12-01 IT IT001044 patent/IT1296597B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| ITTO971044A0 (en) | 1997-12-01 |
| ITTO971044A1 (en) | 1999-06-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 0001 | Granted |