公开(公告)号：CZ9900957A3

公开(公告)日：2000-01-12

申请号：CZ95799

申请日：1997-09-19

Applicant: BASF AG

Inventor： KOWITZ CHRISTOPH ,  BAUER PETER ,  BEIMBORN DIETER BERNHARD ,  BRUCHMANN BERND ,  FALLER UWE ,  LAUN MARTIN ,  PAGGA UDO ,  PIPPER GUNTER ,  WARZELHAN VOLKER

IPC: C08J5/00 ,  C08G18/42 ,  C08G18/76 ,  C08G18/79 ,  C08G63/20 ,  C09D5/00 ,  C09D167/00 ,  C09D175/04 ,  D01F6/84 ,  D01F6/92 ,  C08G63/91 ,  C08G63/16 ,  C08G63/685

CPC classification number: C08G63/20 ,  C08G18/4216 ,  C08G18/7664 ,  C08G18/791 ,  C08G2170/20 ,  C08G2230/00 ,  Y10T428/2913

公开(公告)号：ES2122792T3

公开(公告)日：1998-12-16

申请号：ES96902980

申请日：1996-02-03

Applicant: BASF AG

Inventor： WARZELHAN VOLKER ,  PIPPER GUNTER ,  SEELIGER URSULA ,  BAUER PETER ,  BEIMBORN DIETER BERNHARD ,  YAMAMOTO MOTONORI

IPC: C08G63/60 ,  C08G63/66 ,  C08J9/04 ,  C08G63/672 ,  C08G63/91 ,  C08L3/00 ,  C08L67/00 ,  C08L101/16 ,  C09J167/00 ,  D21H19/28

Abstract: PCT No. PCT/EP96/00458 Sec. 371 Date Aug. 14, 1997 Sec. 102(e) Date Aug. 14, 1997 PCT Filed Feb. 3, 1996 PCT Pub. No. WO96/25448 PCT Pub. Date Aug. 22, 1996Biodegradable polymers comprising a polyether ester P1 obtained by reacting a first mixture of 20-95 mol% of adipic acid or ester-forming derivatives thereof or mixtures thereof, 5-80 mol% of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and 0-5 mol% of a compound containing sulfonate groups, and a second mixture of 15-99.8 mol% of a dihydroxy compound selected from the group consisting of C2-C6-alkanediols and C5-C10-cycloalkanediols, 85-0.2 mol% of a dihydroxy compound IHO-[(CH2)n-O]m-H(n=2, 3 or 4, m=2-250) with 0-5 mol%, based on the first mixture, of a compound D having at least three groups capable of ester formation, and a bisoxazoline C1, their preparation and their use in the manufacture of biodegradable molding materials.

公开(公告)号：DE59600710D1

公开(公告)日：1998-11-26

申请号：DE59600710

申请日：1996-02-03

Applicant: BASF AG

Inventor： WARZELHAN VOLKER ,  PIPPER GUNTER ,  SEELIGER URSULA ,  BAUER PETER ,  BEIMBORN DIETER ,  YAMAMOTO MOTONORI

IPC: C08J9/04 ,  C08G63/60 ,  C08G63/66 ,  C08G63/672 ,  C08G63/91 ,  C08L3/00 ,  C08L67/00 ,  C08L101/16 ,  C09J167/00 ,  D21H19/28

Abstract: PCT No. PCT/EP96/00458 Sec. 371 Date Aug. 14, 1997 Sec. 102(e) Date Aug. 14, 1997 PCT Filed Feb. 3, 1996 PCT Pub. No. WO96/25448 PCT Pub. Date Aug. 22, 1996Biodegradable polymers comprising a polyether ester P1 obtained by reacting a first mixture of 20-95 mol% of adipic acid or ester-forming derivatives thereof or mixtures thereof, 5-80 mol% of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and 0-5 mol% of a compound containing sulfonate groups, and a second mixture of 15-99.8 mol% of a dihydroxy compound selected from the group consisting of C2-C6-alkanediols and C5-C10-cycloalkanediols, 85-0.2 mol% of a dihydroxy compound IHO-[(CH2)n-O]m-H(n=2, 3 or 4, m=2-250) with 0-5 mol%, based on the first mixture, of a compound D having at least three groups capable of ester formation, and a bisoxazoline C1, their preparation and their use in the manufacture of biodegradable molding materials.

公开(公告)号：DK0802941T3

公开(公告)日：1998-11-23

申请号：DK96900924

申请日：1996-01-09

Applicant: BASF AG

Inventor： WARZELHAN VOLKER ,  SCHORNICK GUNNAR ,  BRAUN FRANK ,  SEELIGER URSULA ,  YAMAMOTO MOTONORI ,  BAUER PETER

IPC: C08G69/40 ,  C08G18/60 ,  C08G69/44 ,  C08G69/48 ,  C08G73/00 ,  C08G73/04 ,  C08J9/04 ,  C08K5/353 ,  C08L77/12 ,  C08L101/16 ,  C09J177/12 ,  D21H19/30

Abstract: PCT No. PCT/EP96/00059 Sec. 371 Date Jul. 3, 1997 Sec. 102(e) Date Jul. 3, 1997 PCT Filed Jan. 9, 1996 PCT Pub. No. WO96/21690 PCT Pub. Date Jul. 18, 1996Biodegradable polyetheresteramides P1 which are obtained by reacting (a1) a mixture containing 20-95 mol % of adipic acid or ester-forming derivatives thereof or mixtures thereof and 5-80 mol % of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and (a2) a mixture of dihydroxy compounds (a21) from 15 to 99.3 mol % of a dihydroxy compound selected from the group consisting of C2-C6-alkanediols and C5-C10-cycloalkanediols, (a22) from 0.2 to 85 mol % of a dihydroxy compound containing ether functionalities of the formula I HO-((CH2)n-O)m-H I where n is 2, 3 or 4 and m is an integer from 2 to 250, or mixtures thereof and (a23) from 0.5 to 80 mol % of an amino-C2-C12-alkanol or amino-C5-C10-cycloalkanol, where the molar ratio of (a1) to (a2) is from 0.4:1 to 1.5:1, with the proviso, inter alia, that the polyetheresteramides P1 have a molecular weight (Mn) in the range from 5000 to 80,000 g/mol, and biodegradable polymers, biodegradable moldings, and adhesives obtained from the disclosed polymers.

公开(公告)号：ES2119563T3

公开(公告)日：1998-10-01

申请号：ES96900924

申请日：1996-01-09

Applicant: BASF AG

Inventor： WARZELHAN VOLKER ,  SCHORNICK GUNNAR ,  BRAUN FRANK ,  SEELIGER URSULA ,  YAMAMOTO MOTONORI ,  BAUER PETER

IPC: C08G69/40 ,  C08G18/60 ,  C08G69/44 ,  C08G69/48 ,  C08G73/00 ,  C08G73/04 ,  C08J9/04 ,  C08K5/353 ,  C08L77/12 ,  C08L101/16 ,  C09J177/12 ,  D21H19/30

Abstract: PCT No. PCT/EP96/00059 Sec. 371 Date Jul. 3, 1997 Sec. 102(e) Date Jul. 3, 1997 PCT Filed Jan. 9, 1996 PCT Pub. No. WO96/21690 PCT Pub. Date Jul. 18, 1996Biodegradable polyetheresteramides P1 which are obtained by reacting (a1) a mixture containing 20-95 mol % of adipic acid or ester-forming derivatives thereof or mixtures thereof and 5-80 mol % of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and (a2) a mixture of dihydroxy compounds (a21) from 15 to 99.3 mol % of a dihydroxy compound selected from the group consisting of C2-C6-alkanediols and C5-C10-cycloalkanediols, (a22) from 0.2 to 85 mol % of a dihydroxy compound containing ether functionalities of the formula I HO-((CH2)n-O)m-H I where n is 2, 3 or 4 and m is an integer from 2 to 250, or mixtures thereof and (a23) from 0.5 to 80 mol % of an amino-C2-C12-alkanol or amino-C5-C10-cycloalkanol, where the molar ratio of (a1) to (a2) is from 0.4:1 to 1.5:1, with the proviso, inter alia, that the polyetheresteramides P1 have a molecular weight (Mn) in the range from 5000 to 80,000 g/mol, and biodegradable polymers, biodegradable moldings, and adhesives obtained from the disclosed polymers.

公开(公告)号：NZ289823A

公开(公告)日：1998-06-26

申请号：NZ28982395

申请日：1995-06-27

Applicant: BASF AG

Inventor： WARZELHAN VOLKER ,  BRUCHMANN BERND ,  BOECKH DIETER ,  SEELIGER URSULA ,  YAMAMOTO MOTONORI ,  BAUER PETER

IPC: C08J9/00 ,  A01G9/10 ,  C05F17/00 ,  C08G18/42 ,  C08G18/46 ,  C08G63/60 ,  C08G63/668 ,  C08G63/672 ,  C08G63/685 ,  C08G63/688 ,  C08G63/91 ,  C08L1/00 ,  C08L67/02 ,  C08L75/06 ,  C08L101/16 ,  C09J167/02 ,  C09J175/06 ,  C09K15/32

Abstract: Biodegradable polyether esters P1 obtainable by reacting a mixture essentially comprising(a1) a mixture essentially comprising20-95 mol % of adipic acid or ester-forming derivatives thereof or mixtures thereof,5-80 mol % of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and0-5 mol % of a compound containing sulfonate groups,where the total of the individual mole percentages is 100 mol %, and(a2) a mixture of dihydroxy compounds essentially comprising(a21) from 15 to 99.8 mol % of a dihydroxy compound selected from the group consisting of C2-C6-alkanediols and C5-C10-cycloalkanediols,(a22) from 85 to 0.2 mol % of a dihydroxy compound containing ether functionalities of the formula Iwhere n is 2, 3 or 4 and m is an integer from 2 to 250, or mixtures thereof,where the molar ratio of (a1) to (a2) is chosen in the range from 0.4:1 to 1.5:1, with the proviso that the polyether ester P1 has a molecular weight (Mn) in the range from 5000 to 80,000 g/mol, a viscosity number in the range from 30 to 450 g/ml (measured in o-dichlorobenzene/phenol (50/50 ratio by weight) at a concentration of 0.5% by weight of polyether ester P1 at 25° C.) and a melting point in the range from 50 to 200° C., and with the further proviso that from 0.01 to 5 mol %, based on the molar quantity of component (a1) employed, of a compound D with at least three groups capable of ester formation are employed to prepare the polyether ester P1,and further biodegradable polymers and thermoplastic molding compositions, processes for the preparation thereof, the use thereof for producing biodegradable moldings and adhesives, biodegradable moldings, films and blends with starch obtainable from the polymers and molding compositions according to the invention.

公开(公告)号：DE19638488A1

公开(公告)日：1998-03-26

申请号：DE19638488

申请日：1996-09-20

Applicant: BASF AG

Inventor： KOWITZ CHRISTOPH ,  BAUER PETER ,  BEIMBORN DIETER BERNHARD ,  BRUCHMANN BERND ,  FALLER UWE ,  LAUN MARTIN ,  PAGGA UDO ,  PIPPER GUNTER ,  WARZELHAN VOLKER

IPC: C08J5/00 ,  C08G18/42 ,  C08G18/76 ,  C08G18/79 ,  C08G63/20 ,  C09D5/00 ,  C09D167/00 ,  C09D175/04 ,  D01F6/84 ,  D01F6/92 ,  C09D167/02 ,  C08L67/02 ,  C08L75/04 ,  C08J5/18

Abstract: Biodegradable polyesters are based on: (A) 95 to 99.99 mol % of at least one polyester which contains as monomer constituents: (a1) a mixture of (a11) 20 to 95 mol % of at least one aliphatic or cycloaliphatic dicarboxylic acid and (a12) 5 to 80 mol % of at least one aromatic dicarboxylic acid; and (a2) at least one dihydroxy compound; and (B) 0.01 to 5 mol % of a mixture which contains mononuclear and polynuclear isocyanurates.

公开(公告)号：CA2266371A1

公开(公告)日：1998-03-26

申请号：CA2266371

申请日：1997-09-19

Applicant: BASF AG

Inventor： PAGGA UDO ,  LAUN MARTIN ,  PIPPER GUNTER ,  KOWITZ CHRISTOPH ,  BEIMBORN DIETER BERNHARD ,  BRUCHMANN BERND ,  BAUER PETER ,  WARZELHAN VOLKER ,  FALLER UWE

IPC: C08J5/00 ,  C08G18/42 ,  C08G18/76 ,  C08G18/79 ,  C08G63/20 ,  C09D5/00 ,  C09D167/00 ,  C09D175/04 ,  D01F6/84 ,  D01F6/92

Abstract: Biodegradable polyesters are based on: (A) 95 to 99.99 mol % of at least one polyester which contains as monomer constituents: (a1) a mixture of (a11) 20 to 95 mol % of at least one aliphatic or cycloaliphatic dicarboxylic acid and (a12) 5 to 80 mol % of at least one aromatic dicarboxylic acid; and (a2) at least one dihydroxy compound; and (B) 0.01 to 5 mol % of a mixture which contains mononuclear and polynuclear isocyanurates.

公开(公告)号：HUT77198A

公开(公告)日：1998-03-02

申请号：HU9701858

申请日：1995-06-27

Applicant: BASF AG

Inventor： BAUER PETER ,  BRUCHMANN BERND ,  SCHORNICK GUNNAR ,  SEELIGER URSULA ,  WARZELHAN VOLKER ,  YAMAMOTO MOTONORI

IPC: C08L3/00 ,  A01G13/02 ,  C08G18/42 ,  C08G18/46 ,  C08G18/66 ,  C08G63/00 ,  C08G63/183 ,  C08G63/20 ,  C08G63/60 ,  C08G63/688 ,  C08G63/91 ,  C08L3/02 ,  C08L67/02 ,  C08L75/06 ,  C08L101/16 ,  C09D167/00 ,  C09K17/52

Abstract: The following are claimed: (A) biodegradable polyester P1, preparable by reaction of a mixt. comprising: (a1) a mixt. comprising: (a11) 35-95 mol.% of adipic acid and/or one or more ester-forming derivs. of this, (a12) 5-65 mol.% of terephthalic acid and/or one or more ester-forming derivs. of this, and (a13) 0-5 mol.% of a cpd. contg. sulphonate gps., the total of mol.% in (a11)-(a13) being 100 mol.%; and (a2) a dihydroxy cpd. selected from 2-6C alkane-diols and 5-10C cycloalkane-diols. The molar ratio of (a1) to (a2) is 0.4-1.5:1. In addn., 0.01-5 mol.% (based on the molar amt. of component (a1)) of a cpd. D, which comprises at least three gps. capable of forming ester gps., are also used for prodn. of polyester P1. Polyester P1 has (a) a mol.wt. (Mn) of 5000-50000 g/mol; (b) a viscosity no. of 30-350 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a P1 concn. of 0.5 wt.%); and (c) a m.pt. of 50-170 degrees C. (B) biodegradable polyester P2, preparable by reaction of a mixt. comprising: (b1) mixt. comprising: (b11) 20-95 mol.% of adipic acid and/or one or more ester-forming deriv. of this, (b12) 5-80 mol.% of terephthalic acid and/or one or more ester- forming deriv. of this, and (b13) 0-5 mol.% of a cpd. contg. sulphonate gps., the total of mol.% in (b11)-(b13) being 100 mol.%; (b2) a dihydroxy cpd. as (a2) above; (b3) 0.01-100 wt.% (based on the amt. of component (b1) of a hydroxycarboxylic acid B1 which is of formula (Ia) or (Ib); and (b4) 0-5 mol.% (based on the amt. of component (b1)) of a cpd. D. The molar ratio of (b1) to (b2) is 0.4-1.25:1. Polyester P2 has (a) a mol.wt. (Mn) of 5000-80000 g/mol; (b) a viscosity no. of 30 - 450 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a P2 concn. of 0.5 wt.%); and (c) a m.pt. of 50-235 degrees C. p = a whole no. from 1-1500; r = a whole no. from 1-4; G = phenylene, (CH2)k, C(R)H and C(R)HCH2; k = 1-5; R = Me or Et. (C) biodegradable polyester Q1 which have: (a) a mol.wt. (Mn) of 5000-100000 g/mol; (b) a viscosity no. of 30-450 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a Q1 concn. of 0.5 wt.%); and (c) a m.pt. of 50-235 degrees C. Q1 are obtained by reaction of a mixt. comprising; (c1) polyester P1 and/or a polyester PWD; (c2) 0.01-50 wt.% (based on (c1)) of a hydroxycarboxylic acid B1; and (c3) 0-5 mol.% (based on the amt. of component (a1) used in prodn. of P1 and/or PWD) of a cpd. D. Polyester PWD is obtainable by reaction of components (a1) and (a2) in a molar ratio of (a1) to (a2) of 0.4-1.5:1. Polyester PWD have: (a) a mol.wt. (Mn) of 5000 - 50000 g/mol; (b) a viscosity no. of 30 - 350 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a PWD concn. of 0.5 wt.%); and (c) a m.pt. of 50-170 degrees C. (D) biodegradable polyesters Q2 which have: (a) a mol.wt. (Mn) of 6000 - 60000 g/mol; (b) a viscosity no. of 30-350 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a Q2 concn. of 0.5 wt.%); and (c) a m.pt. of 50-170 degrees C. Q2 are obtained by reaction of a mixt. comprising: (d1) 95-99.9 wt.% of polyester P1 and/or PWD; and (d2) 0.1-50 wt.% of a diisocyanate C1; and (d3) 0-5 mol.% (based on the amt. of component (a1) used in prodn. of P1 and/or PWD) of a cpd. D. (E) biodegradable polymers T1 which have: (a) a mol.wt. (Mn) of 10000 - 100000 g/mol; (b) a viscosity no. of 30-450 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a T1 concn. of 0.5 wt.%); and (c) a m.pt. of 50-235 degrees C. T1 are obtd. by reaction of polyester Q1 with (e1) 0.1-5 wt.% (based on the amt. of Q1) of diisocyanate C1 and (e2) 0-5 mol.% (based on the amt. of component (a1) used in prodn. of Q1 via the polyester P1 and/or PWD) of a cpd. D. (F) biodegradable polymers T2 which have: (a) a mol.wt. (Mn) of 10000 - 100000 g/mol/. (b) a viscosity no. of 30-450 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a T2 concn. of 0.5 wt.%); and (c) a m.pt. of 50-235 degrees C. T2 are obtained by reaction of polyester Q2 with (f1) 0.01-50 wt.% (based on the amt. of Q2) of hydroxycarboxylic acid B1 and (f2) 0-5 mol.% (based on the amt. of component (a1) used in prodn. of Q2 via the polyester P1 and/or PWD) of a cpd

公开(公告)号：PL321599A1

公开(公告)日：1997-12-08

申请号：PL32159995

申请日：1995-06-27

Applicant: BASF AG

Inventor： WARZELHAN VOLKER ,  SCHORNICK GUNNAR ,  BRUCHMANN BERND ,  SEELIGER URSULA ,  YAMAMOTO MOTONORI ,  BAUER PETER

IPC: A01G13/02 ,  C08G18/42 ,  C08G18/46 ,  C08L3/00 ,  C08G18/66 ,  C08G63/00 ,  C08G63/183 ,  C08G63/20 ,  C08G63/60 ,  C08G63/688 ,  C08G63/91 ,  C08L3/02 ,  C08L67/02 ,  C08L75/06 ,  C08L101/16 ,  C09D167/00 ,  C09K17/52

Abstract: The following are claimed: (A) biodegradable polyester P1, preparable by reaction of a mixt. comprising: (a1) a mixt. comprising: (a11) 35-95 mol.% of adipic acid and/or one or more ester-forming derivs. of this, (a12) 5-65 mol.% of terephthalic acid and/or one or more ester-forming derivs. of this, and (a13) 0-5 mol.% of a cpd. contg. sulphonate gps., the total of mol.% in (a11)-(a13) being 100 mol.%; and (a2) a dihydroxy cpd. selected from 2-6C alkane-diols and 5-10C cycloalkane-diols. The molar ratio of (a1) to (a2) is 0.4-1.5:1. In addn., 0.01-5 mol.% (based on the molar amt. of component (a1)) of a cpd. D, which comprises at least three gps. capable of forming ester gps., are also used for prodn. of polyester P1. Polyester P1 has (a) a mol.wt. (Mn) of 5000-50000 g/mol; (b) a viscosity no. of 30-350 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a P1 concn. of 0.5 wt.%); and (c) a m.pt. of 50-170 degrees C. (B) biodegradable polyester P2, preparable by reaction of a mixt. comprising: (b1) mixt. comprising: (b11) 20-95 mol.% of adipic acid and/or one or more ester-forming deriv. of this, (b12) 5-80 mol.% of terephthalic acid and/or one or more ester- forming deriv. of this, and (b13) 0-5 mol.% of a cpd. contg. sulphonate gps., the total of mol.% in (b11)-(b13) being 100 mol.%; (b2) a dihydroxy cpd. as (a2) above; (b3) 0.01-100 wt.% (based on the amt. of component (b1) of a hydroxycarboxylic acid B1 which is of formula (Ia) or (Ib); and (b4) 0-5 mol.% (based on the amt. of component (b1)) of a cpd. D. The molar ratio of (b1) to (b2) is 0.4-1.25:1. Polyester P2 has (a) a mol.wt. (Mn) of 5000-80000 g/mol; (b) a viscosity no. of 30 - 450 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a P2 concn. of 0.5 wt.%); and (c) a m.pt. of 50-235 degrees C. p = a whole no. from 1-1500; r = a whole no. from 1-4; G = phenylene, (CH2)k, C(R)H and C(R)HCH2; k = 1-5; R = Me or Et. (C) biodegradable polyester Q1 which have: (a) a mol.wt. (Mn) of 5000-100000 g/mol; (b) a viscosity no. of 30-450 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a Q1 concn. of 0.5 wt.%); and (c) a m.pt. of 50-235 degrees C. Q1 are obtained by reaction of a mixt. comprising; (c1) polyester P1 and/or a polyester PWD; (c2) 0.01-50 wt.% (based on (c1)) of a hydroxycarboxylic acid B1; and (c3) 0-5 mol.% (based on the amt. of component (a1) used in prodn. of P1 and/or PWD) of a cpd. D. Polyester PWD is obtainable by reaction of components (a1) and (a2) in a molar ratio of (a1) to (a2) of 0.4-1.5:1. Polyester PWD have: (a) a mol.wt. (Mn) of 5000 - 50000 g/mol; (b) a viscosity no. of 30 - 350 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a PWD concn. of 0.5 wt.%); and (c) a m.pt. of 50-170 degrees C. (D) biodegradable polyesters Q2 which have: (a) a mol.wt. (Mn) of 6000 - 60000 g/mol; (b) a viscosity no. of 30-350 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a Q2 concn. of 0.5 wt.%); and (c) a m.pt. of 50-170 degrees C. Q2 are obtained by reaction of a mixt. comprising: (d1) 95-99.9 wt.% of polyester P1 and/or PWD; and (d2) 0.1-50 wt.% of a diisocyanate C1; and (d3) 0-5 mol.% (based on the amt. of component (a1) used in prodn. of P1 and/or PWD) of a cpd. D. (E) biodegradable polymers T1 which have: (a) a mol.wt. (Mn) of 10000 - 100000 g/mol; (b) a viscosity no. of 30-450 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a T1 concn. of 0.5 wt.%); and (c) a m.pt. of 50-235 degrees C. T1 are obtd. by reaction of polyester Q1 with (e1) 0.1-5 wt.% (based on the amt. of Q1) of diisocyanate C1 and (e2) 0-5 mol.% (based on the amt. of component (a1) used in prodn. of Q1 via the polyester P1 and/or PWD) of a cpd. D. (F) biodegradable polymers T2 which have: (a) a mol.wt. (Mn) of 10000 - 100000 g/mol/. (b) a viscosity no. of 30-450 g/ml (measured in o-dichlorobenzene/phenol (wt. ratio 50/50) at 25 degrees C and a T2 concn. of 0.5 wt.%); and (c) a m.pt. of 50-235 degrees C. T2 are obtained by reaction of polyester Q2 with (f1) 0.01-50 wt.% (based on the amt. of Q2) of hydroxycarboxylic acid B1 and (f2) 0-5 mol.% (based on the amt. of component (a1) used in prodn. of Q2 via the polyester P1 and/or PWD) of a cpd