US4048128A
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Thermally stabilized segmented copolyester adhesive
Assignee: EIDP Inc
•
Filing: 1975-11-21
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Granted: 1977-09-13
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Expires: 1995-11-21
Abstract
Abstract Thermally stabilized thermoplastic segmented copolyester of recurring short chain ester units and long chain ester units joined through ester linkages, having a melt index of less than 150 and a melting point of at least 90° C., an inherent viscosity in the range of 1.0 to 1.7 and an acid number not greater than 3, stabilized with 0.05 to 3.0 percent by weight, based on the weight of copolyester, of an alkaline earth oxide. Improved stabilizing effect can be achieved when 0.25 to 2.5 percent by weight, based on the weight of copolyester, of the alkaline earth oxide is used in conjunction with 0.25 to 2.5 percent by weight, based on the weight of copolyester, of a substantially linear polycarbodiimide. Additional optional materials that can be added with the stabilizer, based on the weight of copolyester, include: 0.25 to 5.0 percent by weight of a compound taken from the group consisting of hindered phenols, nitrogen-containing hindered phenols and hindered secondary amines; 0.25 to 5.0 percent by weight of a thioalkylpropionate ester of 12 to 18 carbon atoms; 0.25 to 5.0 percent by weight of a phosphorous acid ester; or mixtures thereof. A useful stabilized adhesive composition comprises (A) 1 to 99 percent by weight of segmented copolyester, (B) 1 to 99 percent by weight of a compatible low molecular weight thermoplastic resin, and (C) 0.1 to 4.0 percent by weight, based on the weight of copolyester and resin of the alkaline earth oxide, preferably calcium oxide, stabilizer.
Inventors
- 👤 Ernest Francis Eastman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:16
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L67/025; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C09; C09J; C09J167/00; C09J167/02; C08L2666/00; C08L2666/02; C08L2666/54
Claims Analysis
Total Claims: 69
Claim 1
Independent Claim
202 words
A thermally stabilized thermoplastic segmented copolyester consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being of the formula ##STR10## and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being of the formula ##STR11## wherein R is the divalent radical remaining after removal of the carboxyl groups from a dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, said copolyester having a melt index of less than 150, a melting point of at least 90° C., an inherent viscosity in the range of 1.0 to 1.7 and an acid number not greater than 3, stabilized with 0.05 to 3.0 percent by weight, based on the weight of copolyester, of an alkaline earth oxide stabilizer.
Claim 2
Dependent Claim
202 words
A thermally stabilized thermoplastic segmented copolyester consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being of the formula ##STR10## and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being of the formula ##STR11## wherein R is the divalent radical remaining after removal of the carboxyl groups from a dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, said copolyester having a melt index of less than 150, a melting point of at least 90° C., an inherent viscosity in the range of 1.0 to 1.7 and an acid number not greater than 3, stabilized with 0.05 to 3.0 percent by weight, based on the weight of copolyester, of an alkaline earth oxide stabilizer.
Claim 3
Dependent Claim
14 words
The copolyester of claim 1 in which the alkaline earth oxide is calcium oxide.
Claim 4
Dependent Claim
35 words
The copolyester of claim 1 in which R is a divalent saturated cyclic, aromatic or saturated aliphatic, radical remaining after removal of the carboxyl groups from a saturated cyclic, aromatic or saturated aliphatic, dicarboxylic acid.
Claim 5
Dependent Claim
25 words
The copolyester of claim 3 in which R is a divalent aromatic radical remaining after removal of the carboxyl groups from an aromatic dicarboxylic acid.
Claim 6
Dependent Claim
45 words
The copolyester of claim 1 in which there is present in combination with the alkaline earth oxide 0.25 to 2.5 percent by weight, based on the weight of copolyester, of a substantially linear polycarbodiimide having an average of at least two carbodiimide groups per molecule.
Claim 7
Dependent Claim
49 words
The copolyester of claim 1 in which there is present in combination with the alkaline earth oxide 0.25 to 5.0 percent by weight, based on the weight of copolyester, of at least one compound taken from the group consisting of hindered phenols, nitrogen-containing hindered phenols and hindered secondary amines.
Claim 8
Dependent Claim
51 words
The copolyester of claim 5 in which there is present in combination with the alkaline earth oxide and polycarbodiimide 0.25 to 5.0 percent by weight, based on the weight of copolyester, of at least one compound taken from the group consisting of hindered phenols, nitrogen-containing hindered phenols and hindered secondary amines.
Claim 9
Dependent Claim
35 words
The copolyester of claim 1 in which there is present 0.25 to 5.0 percent by weight, based on the weight of copolyester, of a dialkylthiodipropionate ester wherein alkyl is of 12 to 18 carbon atoms.
Claim 10
Dependent Claim
56 words
The copolyester of claim 1 in which there is present 0.25 to 5.0 percent by weight, based on the weight of copolyester, of a phosphorous acid ester of the formula ##STR12## where R 1 , R 2 and R 3 are C 1 to C 18 aliphatic, C 6 to C 15 aromatic and combinations thereof.
Claim 11
Dependent Claim
53 words
The copolyester of claim 1 in which the short chain ester units amount to 15 to 65 percent by weight of the copolyester, the long chain ester units amount to 35 to 85 percent by weight of the copolyester, and the long chain glycol has a melting point of less than 75° C.
Claim 12
Dependent Claim
124 words
The copolymer of claim 1 in which the short chain ester units amount to 15 to 50 percent by weight of copolyester, the long chain ester units amount to 50 to 85 percent by weight of copolyester, the dicarboxylic acid being 55 to 95 percent by weight terephthalic acid, D is the divalent radical remaining after removal of the hydroxyl groups from butanediol, and G is the divalent radical remaining after removal of the terminal groups from polytetramethylene ether glycol having an average molecular weight of 600 to 3500, the copolyester having a melt index of less than 30, a melting point of 90° to 130° C., an inherent viscosity in the range of 1.4 to 1.6, and an acid number less than 2.
Claim 13
Dependent Claim
19 words
The copolyester of claim 11 in which the dicarboxylic acid is a mixture of terephthalic acid and isophthalic acid.
Claim 14
Dependent Claim
19 words
The copolyester of claim 12 in which the polytetramethylene ether glycol has a molecular weight of 600 to 2100.
Claim 15
Dependent Claim
44 words
The copolyester of claim 13 in which the short chain ester units amount to 15 to less than 30 percent by weight of the copolyester and the long chain ester units amount to more than 70 to 85 percent by weight of the copolyester.
Claim 16
Dependent Claim
25 words
The copolyester of claim 14 in which the mixture of terephthalic acid and isophthalic acid contains 70 to 95 percent by weight of terephthalic acid.
Claim 17
Dependent Claim
123 words
The copolyester of claim 5 in which the polycarbodiimide is represented by the formula: X.sub.1 --R.sub.1 --N = C = N -- R.sub.2).sub. n N = C = N -- R.sub.3 --X.sub.2 where R 1 , R 2 and R 3 are C 1 --C 12 aliphatic, C 5 --C 15 cycloaliphatic, or C 6 --C 15 aromatic divalent hydrocarbon radicals, and combinations thereof; X 1 and X 2 are hydrogen, ##STR13## where R 4 , R 5 and R 6 are C 1 --C 12 aliphatic, C 5 --C 15 cycloaliphatic, and C 6 --C 15 aromatic monovalent hydrocarbon radicals and combinations thereof, and additionally R 4 or R 5 can be hydrogen; and n is a number of at least one.
Claim 18
Dependent Claim
13 words
The copolyester of claim 6 in which the compound is a hindered phenol.
Claim 19
Dependent Claim
14 words
The copolyester of claim 17 in which the hindered phenol is tetrakis[methylene-3-(3',5'-ditertiarybutyl-4'-hydroxyphenol) propionate] methane.
Claim 20
Dependent Claim
14 words
The copolyester of claim 6 in which the compound is a nitrogen-containing hindered phenol.
Claim 21
Dependent Claim
14 words
The copolyester of claim 6 in which the compound is a secondary aromatic amine.
Claim 22
Dependent Claim
13 words
The copolyester of claim 9 in which the phosphorous acid ester is trinonylphenylphosphite.
Claim 23
Dependent Claim
278 words
A thermally stabilized thermoplastic hot melt adhesive composition in the molten state which comprises, based on the total thermoplastic components, (A) 1 to 99 percent by weight of thermoplastic segmented copolyester consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being of the formula ##STR14## and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being of the formula ##STR15## wherein R is the divalent radical remaining after removal of the carboxyl groups from a dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, said copolyester having a melt index of less than 150, a melting point of at least 90° C., an inherent viscosity in the range of 1.0 to 1.7, and an acid number of less than 3; (B) 1 to 99 percent by weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copolyester, is thermally stable at 150° C., and has a melt viscosity of less than 10,000 centipoises at 200° C.; stabilized against substantial loss in viscosity in said molten state with (C) 0.1 to 4.0 percent by weight, based on the weight of copolyester and resin, of an alkaline earth oxide.
Claim 24
Dependent Claim
278 words
A thermally stabilized thermoplastic hot melt adhesive composition in the molten state which comprises, based on the total thermoplastic components, (A) 1 to 99 percent by weight of thermoplastic segmented copolyester consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being of the formula ##STR14## and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being of the formula ##STR15## wherein R is the divalent radical remaining after removal of the carboxyl groups from a dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, said copolyester having a melt index of less than 150, a melting point of at least 90° C., an inherent viscosity in the range of 1.0 to 1.7, and an acid number of less than 3; (B) 1 to 99 percent by weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copolyester, is thermally stable at 150° C., and has a melt viscosity of less than 10,000 centipoises at 200° C.; stabilized against substantial loss in viscosity in said molten state with (C) 0.1 to 4.0 percent by weight, based on the weight of copolyester and resin, of an alkaline earth oxide.
Claim 25
Dependent Claim
14 words
The composition of claim 22 in which the alkaline earth oxide is calcium oxide.
Claim 26
Dependent Claim
35 words
The composition of claim 22 in which R is a divalent saturated cyclic, aromatic or saturated aliphatic, radical remaining after removal of the carboxyl groups from a saturated cyclic, aromatic or saturated aliphatic, dicarboxylic acid.
Claim 27
Dependent Claim
25 words
The composition of claim 24 in which R is a divalent aromatic radical remaining after removal of the carboxyl groups from an aromatic dicarboxylic acid.
Claim 28
Dependent Claim
159 words
The composition of claim 22 in which there is present in combination with the alkaline earth oxide 0.1 to 1.0 percent by weight, based on the weight of copolyester and resin, of a substantially linear polycarbodiimide having an average of at least two carbodiimide groups per molecule represented by the formula: X.sub.1 --R.sub.1 --N = C = N -- R.sub.2).sub. n N = C = N -- R.sub.3 --X.sub.2 where R 1 , R 2 and R 3 are C 1 --C 12 aliphatic, C 5 --C 15 cycloaliphatic, or C 6 --C 15 aromatic divalent hydrocarbon radicals, and combinations thereof; X 1 and X 2 are hydrogen, ##STR16## where R 4 , R 5 and R 6 are C 1 --C 12 aliphatic, c 5 --C 15 cycloaliphatic, and C 6 --C 15 aromatic monovalent hydrocarbon radicals and combinations thereof, and additionally R 4 or R 5 can be hydrogen; and n is number of at least one.
Claim 29
Dependent Claim
51 words
The compositin of claim 22 in which there is present in combination with the alkaline earth oxide 0.1 to 2.0 percent by weight, based on the weight of copolyester and resin, of at least one compound taken from the group consisting of hindered phenols, nitrogen-containing hindered phenols and hindered secondary amines.
Claim 30
Dependent Claim
53 words
The composition of claim 26 in which there is present in combination with the alkaline earth oxide and polycarbodiimide 0.1 to 2.0 percent by weight, based on the weight of copolyester and resin, of at least one compound taken from the group consisting of hindered phenols, nitrogen-containing hindered phenols and hindered secondary amines.
Claim 31
Dependent Claim
37 words
The composition of claim 22 in which there is present 0.1 to 2.0 percent by weight, based on the weight of copolyester and resin, of a dialkylthiodipropionate ester wherein alkyl is of 12 to 18 carbon atoms.
Claim 32
Dependent Claim
58 words
The composition of claim 22 in which there is present 0.1 to 2.0 percent by weight, based on the weight of copolyester and resin, of a phosphorous acid ester of the formula ##STR17## where R 1 , R 2 and R 3 are C 1 to C 18 aliphatic, C 6 to C 15 aromatic, and combinations thereof.
Claim 33
Dependent Claim
45 words
The composition of claim 22 in which the low molecular weight thermoplastic resin is selected from the group consisting of hydrocarbon resins, bituminous asphalts, coal tar pitches, rosins, rosin based alkyd resins, phenolic resins, chorinated aliphatic hydrocarbon waxes, chlorinated polynuclear aromatic hydrocarbons, and mixtures thereof.
Claim 34
Dependent Claim
33 words
The composition of claim 31 in which the thermoplastic composition comprises 5 to 95 percent by weight of segmented copolyester and 5 to 95 percent by weight of low molecular weight thermoplastic resin.
Claim 35
Dependent Claim
29 words
The composition of claim 31 which comprises 20 to 60 percent by weight of segmented copolyester and 40 to 80 percent by weight of low molecular weight thermoplastic resin.
Claim 36
Dependent Claim
56 words
The composition of claim 31 in which the dicarboxylic acid is an aromatic dicarboxylic acid of 8 to 16 carbon atoms, the low molecular weight diol is aliphatic diol of 2 to 8 carbon atoms, and the long chain glycol is poly(alkylene ether) glycol in which the alkylene group is of 2 to 9 carbon atoms.
Claim 37
Dependent Claim
78 words
the composition of claim 34 in which the short chain ester units amount to about 30 to 65 percent by weight of the copolyester, the long chain ester units amount to about 35 to 70 percent by weight of the copolyester, and the copolyester has a melt index of less than 50, a melting point of at least 140° C., an inherent viscosity of about 1.4 to 1.6 and an acid number of 1 to less than 2.
Claim 38
Dependent Claim
54 words
The composition of claim 35 in which the dicarboxylic acid is an aromatic dicarboxylic acid selected from the group consisting of terephthalic acid, and mixtures of terephthalic and isophthalic acids, the low molecular weight diol is butanediol, and the long chain glycol is polytetramethylene ether glycol having a molecular weight of 600 to 3000.
Claim 39
Dependent Claim
29 words
The composition of claim 36 which comprises 15 to 45 percent by weight of segmented copolyester and 55 to 85 percent by weight of low molecular weight thermoplastic resin.
Claim 40
Dependent Claim
25 words
The composition of claim 37 in which the low molecular weight thermoplastic resin is a mixture of at least two low molecular weight thermoplastic resins.
Claim 41
Dependent Claim
19 words
The composition of claim 38 in which one of the low molecular weight thermoplastic resins is a styrene polymer.
Claim 42
Dependent Claim
19 words
The composition of claim 38 in which one of the low molecular weight thermoplastic resins is a coumarone-indene resin.
Claim 43
Dependent Claim
19 words
The composition of claim 38 in which one of the low molecular weight thermoplastic resins is a bituminous asphalt.
Claim 44
Dependent Claim
18 words
The composition of claim 38 in which one of the low molecular weight thermoplastic resins is a rosin.
Claim 45
Dependent Claim
19 words
The composition of claim 38 in which one of the low molecular weight thermoplastic resins is a terpene resin.
Claim 46
Dependent Claim
19 words
The composition of claim 31 in which the dicarboxylic acid is a mixture of terephthalic acid and isophthalic acid.
Claim 47
Dependent Claim
19 words
The composition of claim 44 in which the polytetramethylene ether glycol has a molecular weight of 600 to 2100.
Claim 48
Dependent Claim
42 words
The composition of claim 45 in which the short chain ester units amount to 15 to less than 30 percent by weight of the copolyester and the long chain ester units amount to more than 70 to 85 percent of the copolyester.
Claim 49
Dependent Claim
25 words
The composition of claim 46 in which the mixture of terephthalic acid and isophthalic acid contains 60 to 95 percent by weight of terephthalic acid.
Claim 50
Dependent Claim
275 words
Method of preparing a thermoplastic composition which comprises blending in molten form, based on the total thermoplastic components, A. 1 to 99 percent by weight of thermoplastic segmented copolyester consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being of the formula: ##STR18## and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being of the formula: ##STR19## wherein R is the divalent radical remaining after removal of the carboxyl groups from dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, said copolyester having a melt index of less than 150, a melting point of at least 90° C., an inherent viscosity in the range of 1.0 to 1.7, and an acid number not greater than 3.0; B. 1 to 99 percent by weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copolyester, is thermally stable at 150° C., and has a melt viscosity of less than 10,000 centipoises at 200° C.; stabilized against substantial loss of viscosity in said molten form with C. 0.1 to 4.0 percent by weight, based on the weight of copolyester and resin, of an alkaline earth oxide.
Claim 51
Dependent Claim
275 words
Method of preparing a thermoplastic composition which comprises blending in molten form, based on the total thermoplastic components, A. 1 to 99 percent by weight of thermoplastic segmented copolyester consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being of the formula: ##STR18## and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being of the formula: ##STR19## wherein R is the divalent radical remaining after removal of the carboxyl groups from dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, said copolyester having a melt index of less than 150, a melting point of at least 90° C., an inherent viscosity in the range of 1.0 to 1.7, and an acid number not greater than 3.0; B. 1 to 99 percent by weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copolyester, is thermally stable at 150° C., and has a melt viscosity of less than 10,000 centipoises at 200° C.; stabilized against substantial loss of viscosity in said molten form with C. 0.1 to 4.0 percent by weight, based on the weight of copolyester and resin, of an alkaline earth oxide.
Claim 52
Dependent Claim
14 words
The method of claim 48 in which the alkaline earth oxide is calcium oxide.
Claim 53
Dependent Claim
35 words
The method of claim 48 in which R is a divalent saturated cyclic, aromatic or saturated aliphatic radical remaining after removal of the carboxyl groups from a saturated cyclic, aromatic or saturated aliphatic, dicarboxylic acid.
Claim 54
Dependent Claim
25 words
The method of claim 50 in which R is a divalent aromatic radical remaining after removal of the carboxyl groups from an aromatic dicarboxylic acid.
Claim 55
Dependent Claim
159 words
The method of claim 48 in which there is present in combination with the alkaline earth oxide 0.1 to 1.0 percent by weight, based on the weight of copolyester and resin, of a substantially linear polycarbodiimide having an average of at least two carbodiimide groups per molecule represented by the formula: X.sub.1 --R.sub.1 --N = C = N - R.sub.2).sub.n N = C = N -- R.sub.3 --X.sub.2 where R 1 , R 2 and R 3 are C 1 -C 12 aliphatic, C 5 -C 15 cycloaliphatic, or C 6 -C 15 aromatic divalent hydrocarbon radicals, and combinations thereof; X 1 and X 2 are hydrogen, ##STR20## where R 4 , R 5 and R 6 are C 1 -C 12 aliphatic, C 5 -C 15 cycloaliphatic, and C 6 -C 15 aromatic monovalent hydrocarbon radicals and combinations thereof, and additionally R 4 or R 5 can be hydrogen; and n is a number of at least one.
Claim 56
Dependent Claim
49 words
The method of claim 48 in which there is present with the alkaline earth oxide 0.1 to 2.0 percent by weight, based on the weight of copolyester and resin, of at least one compound taken from the group consisting of hindered phenols, nitrogen-containing hindered phenols and hindered secondary amines.
Claim 57
Dependent Claim
52 words
The method of claim 52 in which there is present in combination with the alkaline earth oxide and polycarbodiimide 0.1 to 2.0 percent by weight, based on the weight of copolyester and resin, of at least one compound taken from the group consisting of hindered phenols, nitrogen-containing phenols and hindered secondary amines.
Claim 58
Dependent Claim
37 words
The method of claim 48 in which there is present 0.1 to 2.0 percent by weight, based on the weight of copolyester and resin, of a dialkylthiodipropionate ester wherein alkyl is of 12 to 18 carbon atoms.
Claim 59
Dependent Claim
58 words
The method of claim 48 in which there is present 0.1 to 2.0 percent by weight, based on the weight of copolyester and resin, of a phosphorous acid ester of the formula ##STR21## where R 1 , R 2 and R 3 are C 1 to C 18 aliphatic C 6 to C 15 aromatic, and combinations thereof.
Claim 60
Dependent Claim
53 words
The method of claim 48 in which the short chain ester units amount to 15 to 65 percent by weight of the copolyester, the long chain ester units amount to 35 to 85 percent by weight of the copolyester, and the long chain glycol has a melting point of less than 75° C.
Claim 61
Dependent Claim
41 words
The method of claim 57 in which the low molecular weight thermoplastic resin is selected from the group consisting of hydrocarbon resin, bituminous asphalts, coal tar pitches, rosins, phenolic resins, chlorinated aliphatic hydrocarbon waxes, chlorinated polynuclear aromatic hydrocarbons and mixtures thereof.
Claim 62
Dependent Claim
26 words
The method of claim 58 in which the stabilized segmented copolyester is first melted and the low molecular weight thermoplastic resin is added to the melt.
Claim 63
Dependent Claim
26 words
The method of claim 58 in which the low molecular weight thermoplastic resin is first melted and the stabilized segmented copolyester is added to the melt.
Claim 64
Dependent Claim
35 words
The method of claim 58 in which the segmented copolyester and the low molecular weight thermoplastic resin are blended together in finely divided form and melted together and the stabilizer is present prior to blending.
Claim 65
Dependent Claim
37 words
The method of claim 58 in which the segmented copolyester and the low molecular weight thermoplastic resin are blended together in finely divided form and melted together, the alkaline earth oxide being added with the other components.
Claim 66
Dependent Claim
142 words
The method of claim 62 in which there is added with the alkaline earth oxide a substantially linear polycarbodiimide having an average of at least two carbodiimide groups per molecule represented by the formula: X.sub.1 --R.sub.1 --N = C = N -- R.sub.2).sub.n N = C = N -- R.sub.3 --X.sub.2 where R 1 , R 2 and R 3 are C 1 -C 12 aliphatic, C 5 -C 15 cycloaliphatic, or C 6 -C 15 aromatic divalent hydrocarbon radicals, and combinations thereof; X 1 and X 2 are hydrogen, ##STR22## where R 4 , R 5 and R 6 are C 1 -C 12 aliphatic, C 5 -C 15 cycloaliphatic, and C 6 -C 15 aromatic monovalent hydrocarbon radicals and combinations thereof, and additionally R 4 or R 5 can be hydrogen; and n is a number of at least one.
Claim 67
Dependent Claim
38 words
The method of claim 63 in which there is present with the alkaline earth oxide and substantially linear polycarbodiimide at least one compound taken from the group consisting of hindered phenols, nitrogen-containing hindered phenols and hindered secondary amines.
Claim 68
Dependent Claim
23 words
The method of claim 64 in which there is also present a dialkylthiodipropionate ester wherein alkyl is of 12 to 18 carbon atoms.
Claim 69
Dependent Claim
43 words
The method of claim 65 in which there is also present phosphorous acid esters of the formula ##STR23## where R 1 , R 2 and R 3 are C 1 to C 18 aliphatic, C 6 to C 15 aromatic, and combinations thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |