US4652589A
Expired / Lapsed
US
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Polymer/polyols having improved combustion resistance and intrinsic viscosity, methods of making same and polyurethanes prepared therefrom
Assignee: Lyondell Chemical Technology LP
•
Filing: 1985-02-08
•
Granted: 1987-03-24
•
Expires: 2005-02-08
Abstract
Abstract A normally liquid, stable polymer/polyol composition which imparts improved combustion resistance to polyurethane foams prepared therefrom while retaining satisfactory foam tensile properties are formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan, (1) from about 25 to about 60 weight percent of an ethylenically unsaturated monomer or monomers, for example, a mixture of acrylonitrile and styrene in a weight ratio respectively of 25:75 to 0:100, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a polyol comprising a base polyol having a hydroxyl number of less than about 150, wherein the polymer is characterized by a crosslinking coefficient of less than 55 and an intrinsic viscosity of at least 0.30. A process for treating the resulting polymer/polyol composition to reduce the product viscosity to essentially the indigenous system viscosity in polymer/polyol compositions of this type is disclosed, as is a stabilizer precursor which assists in stabilizing the resulting polymer/polyol compositions.
Inventors
- 👤 Donald W. Simroth
- 👤 Frank E. Critchfield
- 👤 Richard C. Myerly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:57
CPC Classifications
C; C08; C08F; C08F291/00; C08F291/06; C08F291/08; C08F283/00; C08F283/06; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/635; C08G18/636; Y; Y10; Y10S; Y10S524/00; Y10S524/923
Claims Analysis
Total Claims: 96
Claim 1
Independent Claim
126 words
A normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan chain transfer agent, (1) from at least about 35 to about 60 weight percent of a mixture of acrylonitrile and an ethylenically unsaturated comonomer or comonomers, at least one of said comonomers being styrene, in a weight ratio of acrylonitrile to comonomer, of from about 35:65 to 25:75, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a component comprising a base polyol having a hydroxyl number of less than about 150, the polymer of said polymer/polyol being characterized by a crosslinking coefficient of less than 20 and an intrinsic viscosity of at least 0.80.
Claim 2
Dependent Claim
126 words
A normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan chain transfer agent, (1) from at least about 35 to about 60 weight percent of a mixture of acrylonitrile and an ethylenically unsaturated comonomer or comonomers, at least one of said comonomers being styrene, in a weight ratio of acrylonitrile to comonomer, of from about 35:65 to 25:75, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a component comprising a base polyol having a hydroxyl number of less than about 150, the polymer of said polymer/polyol being characterized by a crosslinking coefficient of less than 20 and an intrinsic viscosity of at least 0.80.
Claim 3
Dependent Claim
11 words
The polymer/polyol composition of claim 1 wherein said comonomer is styrene.
Claim 4
Dependent Claim
25 words
The polymer/polyol composition of claim 2 wherein the acrylonitrile and styrene mixture is present in an amount of at least about 40 percent by weight.
Claim 5
Dependent Claim
22 words
The polymer/polyol composition of claim 2 wherein the polymer is present in the form of particles, the majority having a smooth appearance.
Claim 6
Dependent Claim
19 words
The polymer/polyol composition of claim 2 wherein the acrylonitrile to styrene weight ratio is about 35:65 to about 30:70.
Claim 7
Dependent Claim
15 words
The polymer/polyol composition of claim 2 wherein the crosslinking coefficient is less than about 10.
Claim 8
Dependent Claim
15 words
The polymer/polyol composition of claim 6 wherein the crosslinking coefficient is less than about 5.
Claim 9
Dependent Claim
13 words
The polymer/polyol composition of claim 7 wherein the crosslinking coefficient is essentially zero.
Claim 10
Dependent Claim
15 words
The polymer/polyol composition of claim 2 wherein said base polyol is a poly (oxypropylene) polyol.
Claim 11
Dependent Claim
35 words
The polymer/polyol composition of claim 9 wherein component (2) comprises a polyol mixture of the base polyol and a stabilizer precursor present in an amount sufficient to assist the dispersion stability of the resulting polymer/polyol.
Claim 12
Dependent Claim
21 words
The polymer/polyol composition of claim 10 wherein said stabilizer precursor has retained unsaturation of at least about 0.03 milliequivalents per gram.
Claim 13
Dependent Claim
18 words
The polymer/polyol composition of claim 10 wherein said stabilizer precursor has retained unsaturation, said unsaturation being predominantly fumarate.
Claim 14
Dependent Claim
161 words
A normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan chain transfer agent, (1) from about 25 to about 60 weight percent of a mixture of acrylonitrile and an ethylenically unsaturated comonomer or comonomers in a weight ratio, respectively, of from about 45:55 to 25:75, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a polyol mixture comprising (a) a base polyol having a hydroxyl number of less than about 150 and (b) a stabilizer precursor having retained unsaturation of at least about 0.05 milliequivalent per gram which is at least 50 percent of the added unsaturation and said stabilizer precursor is present in an amount sufficient to assist the dispersion stability of the resulting polymer/polyol, the polymer of said polymer/polyol being characterized by a crosslinking coefficient of less than about 10 and an intrinsic viscosity of greater than 0.62.
Claim 15
Dependent Claim
161 words
A normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan chain transfer agent, (1) from about 25 to about 60 weight percent of a mixture of acrylonitrile and an ethylenically unsaturated comonomer or comonomers in a weight ratio, respectively, of from about 45:55 to 25:75, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a polyol mixture comprising (a) a base polyol having a hydroxyl number of less than about 150 and (b) a stabilizer precursor having retained unsaturation of at least about 0.05 milliequivalent per gram which is at least 50 percent of the added unsaturation and said stabilizer precursor is present in an amount sufficient to assist the dispersion stability of the resulting polymer/polyol, the polymer of said polymer/polyol being characterized by a crosslinking coefficient of less than about 10 and an intrinsic viscosity of greater than 0.62.
Claim 16
Dependent Claim
11 words
The polymer/polyol composition of claim 13 wherein said comonomer is styrene.
Claim 17
Dependent Claim
25 words
The polymer/polyol composition of claim 14 wherein the acrylonitrile and styrene mixture is present in an amount of at least about 30 percent by weight.
Claim 18
Dependent Claim
25 words
The polymer/polyol composition of claim 15 wherein the acrylonitrile and styrene mixture is present in an amount of at least about 40 percent by weight.
Claim 19
Dependent Claim
22 words
The polymer/polyol composition of claim 14 wherein the polymer is present in the form of particles, the majority having a smooth appearance.
Claim 20
Dependent Claim
19 words
The polymer/polyol composition of claim 14 wherein the acrylonitrile to styrene weight ratio is about 45:55 to about 30:70.
Claim 21
Dependent Claim
15 words
The polymer/polyol composition of claim 14 wherein the crosslinking coefficient is less than about 5.
Claim 22
Dependent Claim
13 words
The polymer/polyol composition of claim 14 wherein the crosslinking coefficient is essentially zero.
Claim 23
Dependent Claim
15 words
The polymer/polyol composition of claim 14 wherein the base polyol is a poly (oxypropylene) polyol.
Claim 24
Dependent Claim
16 words
The polymer/polyol composition of claim 14 wherein the retained unsaturation of the stabilizer precursor is fumarate.
Claim 25
Dependent Claim
33 words
The polymer/polyol composition of claim 14 wherein the stabilizer precursor is formed from a poly (oxypropylene) polyol prepared at least in predominant part with a starter having a functionality in excess of 3.
Claim 26
Dependent Claim
11 words
The polymer/polyol composition of claim 23 wherein said starter is sorbitol.
Claim 27
Dependent Claim
17 words
The polymer/polyol composition of claim 14 wherein said stabilizer precursor has a predominance of secondary hydroxyl groups.
Claim 28
Dependent Claim
15 words
The polymer/polyol composition of claim 14 wherein the intrinsic viscosity is at least about 0.65.
Claim 29
Dependent Claim
136 words
A normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan chain transfer agent, (1) from about 25 to about 60 weight percent of a mixture of acrylonitrile and an ethylenically unsaturated comonomer or comonomers in a weight ratio, respectively, of from about 45:55 to about 25:75, dissolved or dispersed in (2) from about 40 to 75 weight percent of a polyol mixture comprising (a) a base polyol having a hydroxyl number of less than about 150 and (b) a stabilizer precursor present in an amount sufficient to assist the dispersion stability of the resulting polymer/polyol, the polymer of said polymer/polyol being characterized by a crosslinking coefficient of less than about 5 and an intrinsic viscosity of at least about 0.62.
Claim 30
Dependent Claim
136 words
A normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan chain transfer agent, (1) from about 25 to about 60 weight percent of a mixture of acrylonitrile and an ethylenically unsaturated comonomer or comonomers in a weight ratio, respectively, of from about 45:55 to about 25:75, dissolved or dispersed in (2) from about 40 to 75 weight percent of a polyol mixture comprising (a) a base polyol having a hydroxyl number of less than about 150 and (b) a stabilizer precursor present in an amount sufficient to assist the dispersion stability of the resulting polymer/polyol, the polymer of said polymer/polyol being characterized by a crosslinking coefficient of less than about 5 and an intrinsic viscosity of at least about 0.62.
Claim 31
Dependent Claim
11 words
The polymer/polyol composition of claim 27 wherein said comonomer is styrene.
Claim 32
Dependent Claim
15 words
The polymer/polyol composition of claim 28 wherein said base polyol is a poly (oxypropylene) polyol.
Claim 33
Dependent Claim
25 words
The polymer/polyol composition of claim 28 wherein the acrylonitrile and styrene mixture is present in an amount of at least about 30 percent by weight.
Claim 34
Dependent Claim
25 words
The polymer/polyol composition of claim 30 wherein the acrylonitrile and styrene mixture is present in an amount of at least about 40 percent by weight.
Claim 35
Dependent Claim
15 words
The polymer/polyol composition of claim 28 wherein the intrinsic viscosity is at least about 0.65.
Claim 36
Dependent Claim
19 words
The polymer/polyol composition of claim 28 wherein the acrylonitrile to styrene weight ratio is about 45:55 to about 30:70.
Claim 37
Dependent Claim
13 words
The polymer/polyol composition of claim 28 wherein the crosslinking coefficient is essentially zero.
Claim 38
Dependent Claim
136 words
A normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan chain transfer agnet, (1) from about 30 to about 60 weight percent of a mixture of acrylonitrile and an ethylenically unsaturated comonomer or comonomers in a weight ratio of from about 45:55 to about 25:75, dissolved or dispersed in (2) from about 40 to about 70 weight percent of a polyol mixture comprising (a) a base polyol having a hydroxyl number of less than about 150 and (b) a stabilizer precursor present in an amount sufficient to assist the dispersion stability of the resulting polymer/polyol, the polymer of said polymer/polyol being characterized by a crosslinking coefficient of less than about 5 and an intrinsic viscosity of at least about 0.55.
Claim 39
Dependent Claim
136 words
A normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan chain transfer agnet, (1) from about 30 to about 60 weight percent of a mixture of acrylonitrile and an ethylenically unsaturated comonomer or comonomers in a weight ratio of from about 45:55 to about 25:75, dissolved or dispersed in (2) from about 40 to about 70 weight percent of a polyol mixture comprising (a) a base polyol having a hydroxyl number of less than about 150 and (b) a stabilizer precursor present in an amount sufficient to assist the dispersion stability of the resulting polymer/polyol, the polymer of said polymer/polyol being characterized by a crosslinking coefficient of less than about 5 and an intrinsic viscosity of at least about 0.55.
Claim 40
Dependent Claim
11 words
The polymer/polyol composition of claim 35 wherein said comonomer is styrene.
Claim 41
Dependent Claim
15 words
The polymer/polyol composition of claim 37 wherein said base polyol is a poly (oxypropylene) polyol.
Claim 42
Dependent Claim
25 words
The polymer/polyol composition of claim 37 wherein the acrylonitrile and styrene mixture is present in an amount of at least about 40 percent by weight.
Claim 43
Dependent Claim
15 words
The polymer/polyol composition of claim 36 wherein the intrinsic viscosity is at least about 0.65.
Claim 44
Dependent Claim
19 words
The polymer/polyol composition of claim 36 wherein the acrylonitrile to styrene weight ratio is about 45:55 to about 30:70.
Claim 45
Dependent Claim
13 words
The polymer/polyol composition of claim 36 wherein the crosslinking coefficient is essentially zero.
Claim 46
Dependent Claim
21 words
The polymer/polyol composition of claim 36 wherein the stabilizer precursor has retained unsaturation of at least about 0.03 milliequivalents per gram.
Claim 47
Dependent Claim
17 words
The polymer/polyol composition of claim 36 wherein said stabilizer precursor has retained unsaturation, said unsaturation being fumarate.
Claim 48
Dependent Claim
33 words
The polymer/polyol composition of claim 36 wherein the stabilizer precursor is formed from a poly (oxypropylene) polyol prepared at least in predominant part with a starter having a functionality in excess of 3.
Claim 49
Dependent Claim
11 words
The polymer/polyol composition of claim 44 wherein said starter is sorbitol.
Claim 50
Dependent Claim
17 words
The polymer/polyol composition of claim 36 wherein said stabilizer precursor has a predominance of secondary hydroxyl groups.
Claim 51
Dependent Claim
135 words
A normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan chain transfer agent, (1) from about 25 to about 60 weight percent of a monomer mixture of styrene and a comonomer or comonomers in a weight ratio of from about 75:25 to about 100:0, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a polyol mixture comprising (a) a base polyol having a hydroxyl number of less than about 150 and (b) a stabilizer precursor present in an amount sufficient to assist the dispersion stability of the resulting polymer/polyol, the polymer of said polymer/polyol being characterized by a crosslinking coefficient of less than about 55 and an intrinsic viscosity of at least about 0.30.
Claim 52
Dependent Claim
135 words
A normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan chain transfer agent, (1) from about 25 to about 60 weight percent of a monomer mixture of styrene and a comonomer or comonomers in a weight ratio of from about 75:25 to about 100:0, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a polyol mixture comprising (a) a base polyol having a hydroxyl number of less than about 150 and (b) a stabilizer precursor present in an amount sufficient to assist the dispersion stability of the resulting polymer/polyol, the polymer of said polymer/polyol being characterized by a crosslinking coefficient of less than about 55 and an intrinsic viscosity of at least about 0.30.
Claim 53
Dependent Claim
11 words
The polymer/polyol composition of claim 47 wherein said comonomer is acrylonitrile.
Claim 54
Dependent Claim
15 words
The polymer/polyol composition of claim 48 wherein the intrinsic viscosity is at least about 0.40.
Claim 55
Dependent Claim
15 words
The polymer/polyol composition of claim 49 wherein the intrinsic viscosity is at least about 0.50.
Claim 56
Dependent Claim
15 words
The polymer/polyol composition of claim 48 wherein the crosslinking coefficient is less than about 20.
Claim 57
Dependent Claim
21 words
The polymer/polyol composition of claim 48 wherein the stabilizer precursor has retained unsaturation of at least about 0.03 milliequivalents per gram.
Claim 58
Dependent Claim
17 words
The polymer/polyol composition of claim 48 wherein the stabilizer precursor has retained unsaturation, said unsaturation being fumarate.
Claim 59
Dependent Claim
33 words
The polymer/polyol composition of claim 48 wherein the stabilizer precursor is formed from a poly (oxypropylene) polyol prepared at least in predominant part with a starter having a functionality in excess of 3.
Claim 60
Dependent Claim
11 words
The polymer/polyol composition of claim 54 wherein said starter is sorbitol.
Claim 61
Dependent Claim
17 words
The polymer/polyol composition of claim 48 wherein said stabilizer precursor has a predominance of secondary hydroxyl groups.
Claim 62
Dependent Claim
130 words
A process for producing a normally liquid, stable polymer/polyol capable of conversion to a polyurethane which comprises: (a) providing a base polyol having a hydroxyl number of less than about 150, (b) dissolving or dispersing from about 25 to about 60 weight percent of an ethylenically unsaturated monomer or monomers in from about 40 to about 75 weight percent of said base polyol, and (c) polymerizing in the presence of a free radical catalyst and a polymer control agent having at most minimal chain transfer activity, said polymer control agent being present in an amount sufficient to provide the polymer/polyol with a product viscosity which is lower than if said polymer/polyol was prepared in the absence of said polymer control agent while retaining an intrinsic viscosity of at least 0.30.
Claim 63
Dependent Claim
130 words
A process for producing a normally liquid, stable polymer/polyol capable of conversion to a polyurethane which comprises: (a) providing a base polyol having a hydroxyl number of less than about 150, (b) dissolving or dispersing from about 25 to about 60 weight percent of an ethylenically unsaturated monomer or monomers in from about 40 to about 75 weight percent of said base polyol, and (c) polymerizing in the presence of a free radical catalyst and a polymer control agent having at most minimal chain transfer activity, said polymer control agent being present in an amount sufficient to provide the polymer/polyol with a product viscosity which is lower than if said polymer/polyol was prepared in the absence of said polymer control agent while retaining an intrinsic viscosity of at least 0.30.
Claim 64
Dependent Claim
34 words
The process for producing the normally liquid, stable polymer/polyol composition of claim 57 wherein said polymer control agent is a member selected from the group consisting of methanol, water, benzene, cyclohexane and mixtures thereof.
Claim 65
Dependent Claim
12 words
The process of claim 57 wherein the polymer control agent is methanol.
Claim 66
Dependent Claim
17 words
The process of claim 57 wherein the polymer control agent is a mixture of methanol and water.
Claim 67
Dependent Claim
34 words
The process for producing the normally liquid, stable polymer/polyol composition of claim 57 wherein a monomer mixture is used and includes acrylonitrile and the polymer has a crosslinking coefficient of less than about 55.
Claim 68
Dependent Claim
22 words
The process for producing the normally liquid, stable polymer/polyol composition of claim 62 wherein the crosslinking coefficient is less than about 20.
Claim 69
Dependent Claim
22 words
The process for producing the normally liquid, stable polymer/polyol composition of claim 61 wherein the intrinsic viscosity is at least about 0.55.
Claim 70
Dependent Claim
22 words
The process for producing the normally liquid, stable polymer/polyol composition of claim 61 wherein the intrinsic viscosity is at least about 0.65.
Claim 71
Dependent Claim
19 words
The process for producing the normally liquid, stable polymer/polyol composition of claim 61 wherein the monomer mixture includes styrene.
Claim 72
Dependent Claim
26 words
The process for producing the normally liquid, stable polymer/polyol composition of claim 65 wnerein the acrylonitrile to styrene weight ratio is from about 45:55 to 25:75.
Claim 73
Dependent Claim
32 words
The process for producing the normally liquid, stable polymer/polyol composition of claim 65 wherein the acrylonitrile and styrene mixture is present in an amount of at least about 30 percent by weight.
Claim 74
Dependent Claim
40 words
The process for producing the normally liquid, stable polymer/polyol composition of claim 65 wherein the polymerization is carried out in the presence of a stabilizer precursor present in an amount sufficient to assist the dispersion stability of the resulting polymer/polyol.
Claim 75
Dependent Claim
33 words
The process for producing the normally liquid, stable polymer/polyol composition of claim 65 wherein the polymer control agent is present in an amount up to about 30 percent by weight of the composition.
Claim 76
Dependent Claim
108 words
A normally liquid, stable polymer/polyol composition, capable of conversion to a polyurethane, formed by polymerizing in the presence of a free radical catalyst and a polymer control agent having at most minimal chain transfer activity, (1) from about 25 to about 60 weight percent of an ethylenically unsaturated monomer or monomers, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a polyol having a hydroxyl number of less than about 150, the polymer/polyol having a product viscosity which is lower than if said polymer/polyol had been prepared in the absence of said polymer control agent and an intrinsic viscosity of at least 0.30.
Claim 77
Dependent Claim
108 words
A normally liquid, stable polymer/polyol composition, capable of conversion to a polyurethane, formed by polymerizing in the presence of a free radical catalyst and a polymer control agent having at most minimal chain transfer activity, (1) from about 25 to about 60 weight percent of an ethylenically unsaturated monomer or monomers, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a polyol having a hydroxyl number of less than about 150, the polymer/polyol having a product viscosity which is lower than if said polymer/polyol had been prepared in the absence of said polymer control agent and an intrinsic viscosity of at least 0.30.
Claim 78
Dependent Claim
13 words
The polymer/polyol composition of claim 70 wherein said polymer control agent is methanol.
Claim 79
Dependent Claim
18 words
The polymer/polyol composition of claim 70 wherein said polymer control agent is a mixture of methanol and water.
Claim 80
Dependent Claim
126 words
A process for reducing the viscosity of a polymer/polyol, capable of conversion to a polyurethane, which comprises: (a) providing a normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst (1) from about 25 to about 60 weight percent of an ethylenically unsaturated monomer or monomers, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a base polyol having a hydroxyl number of less than about 150, said polymer being present in the form of particles and characterized by an intrinsic viscosity of at least 0.30, and said polymer/polyol composition having a viscosity above its indigenous viscosity and (b) treating the polymer/polyol to reduce the viscosity of the polymer/polyol composition to essentially its indigenous viscosity.
Claim 81
Dependent Claim
126 words
A process for reducing the viscosity of a polymer/polyol, capable of conversion to a polyurethane, which comprises: (a) providing a normally liquid, stable polymer/polyol composition formed by polymerizing in the presence of a free radical catalyst (1) from about 25 to about 60 weight percent of an ethylenically unsaturated monomer or monomers, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a base polyol having a hydroxyl number of less than about 150, said polymer being present in the form of particles and characterized by an intrinsic viscosity of at least 0.30, and said polymer/polyol composition having a viscosity above its indigenous viscosity and (b) treating the polymer/polyol to reduce the viscosity of the polymer/polyol composition to essentially its indigenous viscosity.
Claim 82
Dependent Claim
16 words
The process of claim 63 wherein a monomer mixture is used which includes acrylonitrile or styrene.
Claim 83
Dependent Claim
35 words
The process of claim 74 wherein said treating step comprises heating the polymer/polyol composition to a temperature and for a time sufficient to reduce the viscosity of the polymer/polyol composition to essentially its indigenous viscosity.
Claim 84
Dependent Claim
35 words
The process of claim 74 wherein said treating step comprises treating the polymer/polyol composition in the presence of a solvating agent in an amount sufficient to reduce the composition viscosity to essentially its indigenous viscosity.
Claim 85
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 1, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
Claim 86
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 2, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
Claim 87
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 13, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
Claim 88
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 14, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
Claim 89
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 27, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
Claim 90
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 29, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
Claim 91
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 35, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
Claim 92
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 37, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
Claim 93
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 47, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
Claim 94
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 70, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
Claim 95
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 71, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
Claim 96
Dependent Claim
34 words
A polyurethane produced by reacting a mixture comprising (a) the polymer/polyol composition of claim 72, (b) an organic polyisocyanate and (c) a catalyst for the reaction of (a) and (b) to produce the polyurethane.
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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) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |