Patent US4081413A successfully refreshed from Google Patents.
US4081413A
Expired / Lapsed
US
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Polyvinyl chloride compositions
Assignee: Occidental Chemical Corp
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Filing: 1975-12-29
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Granted: 1978-03-28
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Expires: 1995-12-29
Abstract
Abstract Polyvinyl chloride compositions comprising per 100 parts by weight of polyvinyl chloride, about 0.7 to 14 parts of a polyvinyl chloride plasticizer, about 4 to 25 parts of an impact-modifier, about 1 to 3 parts of a processing aid, and about 1 to 3 parts of at least one lubricant. The compositions are preferably stabilized with a total of about 6 and 9 parts of stabilizer and stabilizer booster combination. The compositions are formable with finger pressure at temperatures above a minimum forming temperature for each specific composition. Said minimum forming temperature is preferably between about 120 DEG F and 160 DEG F.
Inventors
- 👤 Axel W. Tybus
- 👤 Leonard A. Fabrizio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:39
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08K; C08K3/00; C08K3/01; C08K5/00; C08K5/0008; C08L57/00; C08L29/00; C08L29/02; C08L29/04; C08L51/00; C08L51/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
182 words
A polyvinyl chloride composition which is formable at elevated temperatures and is a shape-retaining solid at room temperatures and which is capable of being formed into a plastic sheet having the following properties. a tensile strength at yield of above about 2,000 psi, an elongation at yield of between 3% and 30%, a flexural modulus of between about 0.5×10 5 and 7×10 5 psi, a notched Izod of between 0.3 and 30 foot pounds per inch of notch, a Rockwell hardness of between 75 and 110 on the R scale, and a Vicat softening point of between 60° C and 80° C, comprising 100 parts by weight of polyvinyl chloride, about 0.7 to 14 parts of a polyvinyl chloride plasticizer, about 4 to 25 parts of a polyvinyl chloride impact-modifier, about 1 to 3 parts of a polyvinyl chloride processing aid, about 1 to 3 parts of at least one polyvinyl chloride lubricant, at least one polyvinyl chloride stabilizer and at least one polyvinyl chloride stabilizer booster in an amount between about 6 and 11 parts of said stabilizer and stabilizer booster.
Claim 2
Dependent Claim
182 words
A polyvinyl chloride composition which is formable at elevated temperatures and is a shape-retaining solid at room temperatures and which is capable of being formed into a plastic sheet having the following properties. a tensile strength at yield of above about 2,000 psi, an elongation at yield of between 3% and 30%, a flexural modulus of between about 0.5×10 5 and 7×10 5 psi, a notched Izod of between 0.3 and 30 foot pounds per inch of notch, a Rockwell hardness of between 75 and 110 on the R scale, and a Vicat softening point of between 60° C and 80° C, comprising 100 parts by weight of polyvinyl chloride, about 0.7 to 14 parts of a polyvinyl chloride plasticizer, about 4 to 25 parts of a polyvinyl chloride impact-modifier, about 1 to 3 parts of a polyvinyl chloride processing aid, about 1 to 3 parts of at least one polyvinyl chloride lubricant, at least one polyvinyl chloride stabilizer and at least one polyvinyl chloride stabilizer booster in an amount between about 6 and 11 parts of said stabilizer and stabilizer booster.
Claim 3
Dependent Claim
56 words
The composition of claim 1 which also contains up to about 5% of pigments and other polyvinyl chloride adjuvants, between about 0.8 and 4 parts of said stabilizer and between about 5 and 8 parts of said stabilizer booster, and wherein said polyvinyl chloride resin has a number average molecular weight between about 15,000 and 40,000.
Claim 4
Dependent Claim
63 words
The composition of claim 3 comprising between about 3 and 10 parts of said plasticizer, between about 8 and 16 parts of said impact-modifier, between about 1.5 and 2.1 parts of said processing aid, between about 11/4 and 2 parts of said lubricant, between about 0.8 and 3 parts of said stabilizer, and between about 5.5 to 6.5 parts of said stabilizer booster.
Claim 5
Dependent Claim
116 words
The composition of claim 3, wherein said polyvinyl chloride has a number average molecular weight between about 17,000 and 32,000, said plasticizer is a phthalate plasticizer, said impact-modifier is selected from the group consisting of methylmethacrylate-butadiene-styrene polymer, acrylonitrile-butadiene-styrene polymer, and chlorinated polyethylene, said processing aid is an acrylic-type processing aid, said lubricant is at least one lubricant selected from the group consisting of glycerides, citrates and hydrogenated medium and long chain carboxylic acids, said polyvinyl chloride stabilizer is in an amount between about 0.8 and 1.1 parts and is at least one metal stearate stabilizer, and said stabilizer booster is at least one compound selected from the group consisting of phosphites, epoxidized oils and polyvinyl alcohol.
Claim 6
Dependent Claim
41 words
The composition of claim 4 containing as the metal stearate stabilizer, a mixture of calcium stearate, stannous stearate, and zinc stearate; and containing as the stabilizer booster, a mixture of epoxidized soybean oil, mixed di- and tri-nonylphenyl phosphite, and polyvinyl alcohol.
Claim 7
Dependent Claim
110 words
The composition of claim 1 which is a shape-retaining solid at room temperatures consisting essentially of 100 parts by weight of polyvinyl chloride having a number average molecular weight of about 20,000 to 30,000, about 7.5 to 8.5 parts of phthalate plasticizer, about 10 to 14 parts of polyvinyl chloride impact-modifier, about 11/4 to 2 parts of polyvinyl chloride lubricant, about 1.5 to 2.1 parts of polyvinyl chloride processing aid, about 0.8 to 3 parts of polyvinyl chloride stabilizer, about 5 to 6.5 parts of polyvinyl chloride stabilizer booster, said stabilizer booster containing between about 0.05 to 0.08 parts of polyvinyl alcohol, and up to about 5 parts of pigment.
Claim 8
Dependent Claim
138 words
The composition of claim 6, consisting essentially of 100 parts by weight of polyvinyl chloride having a number average molecular weight of about 20,000 to 26,000, about 8 parts of plasticizer, about 12 parts of impact modifier selected from the group consisting of methylmethacrylate-butadiene-styrene polymer, acrylonitrile-butadiene-styrene polymer, and chlorinated polyethylene, about 11/4 parts of a blend of oleofinic monoglyceride with hydrogen olein as a lubricant and about 0.3 parts of tri-stearyl citrate lubricant, about 1.8 parts of an acrylic-type processing aid, about 0.27 parts of calcium stearate, about 0.4 part of stannous stearate and about 0.31 part of zinc stearate as the stabilizers, about 5 parts of epoxidized soybean oil, about 1.5 parts of mixed di- and tri-nonylphenyl phosphite, and about 0.0675 part of polyvinyl alcohol, as the stabilizer boosters, and about 2.5 to 3.5 parts of pigments.
Claim 9
Dependent Claim
56 words
The composition of claim 1 which is capable of being formed into a plastic sheet having the following properties: a tensile strength at yield of between about 2,000 and 10,000 psi, and is capable of being formable at temperatures above a minimum forming temperature, said minimum forming temperature being between about 120° F and 160° F.
Claim 10
Dependent Claim
86 words
The composition of claim 8 having the following physical properties: a tensile strength at yield of between 5,000 and 8,000 psi, an elongation at yield of between 4% and 8%, a flexural strength of between 8,000 and 12,000 psi, a flexural modulus of between about 2×10 5 and 5×10 5 psi, a notched Izod of between 0.5 and 15 foot pounds per inch of notch, a Rockwell hardness of between 75 and 110 on the R scale, and a minimum forming temperature of about 129°-130° F.
Claim 11
Dependent Claim
86 words
The composition of claim 7 having the following physical properties: a tensile strength at yield of between 5,000 and 8,000 psi, an elongation at yield of between 4% and 8%, a flexural strength of between 8,000 and 12,000 psi, a flexural modulus of between about 2×10 5 and 5×10 5 psi, a notched Izod of between 0.5 and 15 foot pounds per inch of notch, a Rockwell hardness of between 75 and 110 on the R scale, and a minimum forming temperature of about 129°-130° F.
Claim 12
Dependent Claim
99 words
A polyvinyl chloride composition which is finger formable at elevated temperatures and is a shape-retaining solid at room temperatures comprising 100 parts by weight of polyvinyl chloride, about 0.7 to 14 parts of a polyvinyl chloride plasticizer, about 4 to 25 parts of a polyvinyl chloride impact-modifier, about 1 to 3 parts of a polyvinyl chloride processing aid, about 1 to 3 parts of at least one polyvinyl chloride lubricant, about 0.8 to 4 parts of at least one polyvinyl chloride stabilizer, and about 5 to 8 parts of at least one polyvinyl chloride stabilizer booster containing polyvinyl alcohol.
Claim 13
Dependent Claim
99 words
A polyvinyl chloride composition which is finger formable at elevated temperatures and is a shape-retaining solid at room temperatures comprising 100 parts by weight of polyvinyl chloride, about 0.7 to 14 parts of a polyvinyl chloride plasticizer, about 4 to 25 parts of a polyvinyl chloride impact-modifier, about 1 to 3 parts of a polyvinyl chloride processing aid, about 1 to 3 parts of at least one polyvinyl chloride lubricant, about 0.8 to 4 parts of at least one polyvinyl chloride stabilizer, and about 5 to 8 parts of at least one polyvinyl chloride stabilizer booster containing polyvinyl alcohol.
Claim 14
Dependent Claim
79 words
The composition of claim 11 wherein said polyvinyl chloride is a polyvinyl chloride homopolymer resin having a number average molecular weight between about 15,000 and 40,000, and comprises between about 3 and 10 parts of plasticizer, about 8 to 16 parts of impact-modifier, about 1.5 to 2.1 parts of processing aid, about 1 1/4 to 2 parts of lubricant, about 0.8 and 3 parts of stabilizer, and about 5 and 6 1/2 parts of stabilizer booster containing polyvinyl alcohol.
Claim 15
Dependent Claim
110 words
The composition of claim 12 wherein said polyvinyl chloride homopolymer resin has a number average molecular weight of between about 17,000 and 32,000, and comprising about 7.5 to 8.5 parts of phthalate plasticizer, about 10 to 14 parts of impact-modifier, provided that when the homopolymer resin has a number average molecular weight below about 20,000, the impact-modifier is in an amount of at least about 12 parts, about 0.8 and 1.1 parts of metal stearate stabilizer, and about 4 to 6 parts of epoxidized soybean oil, about 1.25 to 1.75 parts of mixed di- and tri-nonylphenyl phosphite, and about 0.05 to 0.08 part of polyvinyl alcohol, as the stabilizer boosters.
Claim 16
Dependent Claim
109 words
The composition of claim 13 wherein said impact-modifier is selected from the group consisting of methylmethacrylate-butadiene-styrene polymer, acrylonitrile-butadiene-styrene polymer, and chlorinated polyethylene, said processing aid is an acrylic-type processing aid, said lubricant is at least one selected from the group consisting of a blend of oleofinic monoglyceride with hydrogen olein and tri-stearyl citrate, said stabilizer is a mixture of about 0.27 parts of calcium stearate, about 0.4 part of stannous stearate, and about 0.31 part of zinc stearate, and said stabilizer booster is a mixture of about 5 parts of epoxidized soybean oil, about 1.5 parts of mixed di- and tri-nonlyphenyl phosphite, and about 0.0675 part of polyvinyl alcohol.
Claim 17
Dependent Claim
32 words
The composition of claim 14 wherein said polyvinyl chloride is a homopolymer resin having a number average molecular weight of between about 20,000 and 26,000, and wherein said plasticizer is di-2-ethylhexyl phthalate.
Claim 18
Dependent Claim
48 words
The composition of claim 15 wherein said plasticizer is in an amount of about 8 parts, said impact-modifier is in an amount of about 12 parts, said processing aid is in an amount of about 1.8 parts, and said lubricant is in an amount of about 1.5 parts.
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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) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |