Patent CA1129600A successfully refreshed from Google Patents.
CA1129600A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Flexible polyalkenyl aromatic polymeric foamed sheet
Assignee: Monsanto Co
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Filing: 1980-07-04
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Granted: 1982-08-10
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Expires: 2000-07-04
Abstract
Abstract ABSTRACT OF THE DISCLOSURE The invention relates to a low density foamed polymeric sheet comprising a polyalkenyl aromatic polymer having dispersed therein about 0.1 to 5.0% of a polyolefin resin, based on said polymer, said foamed sheet having multiaxial flexibility. A process for preparing said foamed sheet is also disclosed.
Inventors
- 👤 Stuart L. Terry
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-05 23:10
CPC Classifications
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Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
34 words
A low density foamed polymeric sheet compris-ing a polyalkenyl aromatic polymer having dispersed therein about 0.1 to 5.0% by weight of 2 polyolefin resin, based on said polymer, said formed sheet having multiaxial flexibil-ity.
Claim 2
Dependent Claim
34 words
A low density foamed polymeric sheet compris-ing a polyalkenyl aromatic polymer having dispersed therein about 0.1 to 5.0% by weight of 2 polyolefin resin, based on said polymer, said formed sheet having multiaxial flexibil-ity.
Claim 3
Dependent Claim
13 words
A sheet of Claim 1 having a folding endurance of at least 10.
Claim 4
Dependent Claim
19 words
A sheet of Claim 1 having a density of about 0.5 to 10 lbs./cu.ft. (8 to 160 kgs./cu. meter).
Claim 5
Dependent Claim
14 words
A sheet of Claim 1 having a cell size averaging less than 0.5 mm.
Claim 6
Dependent Claim
15 words
A sheet of Claim 1 having a cell size averaging about 0.005 to 0.5 mm.
Claim 7
Dependent Claim
13 words
A sheet of Claim 1 having a thickness of 0.025 to 12.5 mm.
Claim 8
Dependent Claim
32 words
A sheet of Claim 1 therein said polyalkenyl aromatic polymer is formed from monomers selected from the group consisting of styrene, alpha methyl styrene, aralkyl styrene, arhalostyrene, aralkylhalo styrene and mixtures thereof.
Claim 9
Dependent Claim
18 words
A sheet of Claim 1 wherein said polyolefin resin has a density of about 0.890 to 0.967 gm./cu.cm.
Claim 10
Dependent Claim
28 words
A sheet or Claim 1 wherein said polyolefin resin has a molecular weight of about least 20,000 and is selected from the group consisting of polyethylene and polypropylene.
Claim 11
Dependent Claim
78 words
A process for preparing a foamed polymeric sheet by extruding a composition comprising: (A) a polyalkenyl aromatic polymer, (B) a volatile blowing agent, and (C) a nucleating agent, as a melt under pressure through a sheet die into a zone of low pressure to permit foaming of said composition, there being present in said composition about 0.1 to 5.0% by weight of a polyolefin resin, based on said alkenyl aromatic polymer, providing a foamed sheet having multi-axial flexibility.
Claim 12
Dependent Claim
78 words
A process for preparing a foamed polymeric sheet by extruding a composition comprising: (A) a polyalkenyl aromatic polymer, (B) a volatile blowing agent, and (C) a nucleating agent, as a melt under pressure through a sheet die into a zone of low pressure to permit foaming of said composition, there being present in said composition about 0.1 to 5.0% by weight of a polyolefin resin, based on said alkenyl aromatic polymer, providing a foamed sheet having multi-axial flexibility.
Claim 13
Dependent Claim
15 words
A process of Claim 10, said sheet having a folding endurance of at least 10.
Claim 14
Dependent Claim
20 words
A process of Claim 10, said sheet having a density of about 0.5 to 10 lbs./cu.ft. (8 to 160 kgs./cu.meter).
Claim 15
Dependent Claim
15 words
A process of Claim 10, said sheet having a cell size averaging less than 0.5mm.
Claim 16
Dependent Claim
16 words
A process of Claim 10, said sheet having a cell size averaging about 0.005 to 0.5mm.
Claim 17
Dependent Claim
14 words
A process of Claim 10, said sheet having a thickness of 0.025 to 12.5mm.
Claim 18
Dependent Claim
32 words
A process of Claim 10 wherein said polyalkenyl aromatic polymer is formed from monomers selected from the group consisting of styrene, alpha methyl styrene, aralkyl styrene, arhalostyrene, aralkylhalo styrene and mixtures thereof.
Claim 19
Dependent Claim
18 words
A process of Claim 10 wherein said polyolefin resin has a density of about 0.890 to 0.967 gm./cu.cm.
Claim 20
Dependent Claim
28 words
A process of Claim 10 wherein said polyolefin resin has a molecular weight of at least 20,000 and is se-lected from the group consisting of polyethylene and poly-propylene.
Claim 21
Dependent Claim
33 words
A process of Claim 10 wherein said blowing agent is selected from the group consisting of propane, butane, pentane, hexane, cyclohexane, heptane, petroleum ether, fluorochlorohydrocarbons, chlorohydrocarbons, fluorohydrocarbons, C02 and N2 or mixtures thereof.
Claim 22
Dependent Claim
34 words
A process of Claim 10 wherein said nucleating agent is selcted from the group consis.ing of alkali and alkaline earth carbonates or bicarbonates used in combina-tion with a solid organic acid or acid-reacting salt.
Claim 23
Dependent Claim
23 words
A process of Claim 10 wherein said nucleating agent is selected from the group consisting of talc, sili-cates and wax or mixtures thereof.
Claim 24
Dependent Claim
27 words
A process of Claim 10 wherein said blowing agent is present in said composition in amounts of about 2 to 10% by weight based on said polymer.
Claim 25
Dependent Claim
25 words
A process of Claim 10 wherein said nucleating agent is present in an amount of about 0.2 to 10% by weight based on said polymer.
Claim 26
Dependent Claim
14 words
A low density, flexible, foamed polymeric sheet formed by the process of Claim 10.
Claim 27
Dependent Claim
46 words
A low density foamed polystyrene sheet having dispersed therein about 0.1 to 5.0% by weight of a poly-olefin resin based on the weight of said polymer, said polyolefin resin selected from the group consisting of polyethylene and polypropylene or mixtures thereof, said sheet having multiaxial flexibility.
Claim 28
Dependent Claim
46 words
A low density foamed polystyrene sheet having dispersed therein about 0.1 to 5.0% by weight of a poly-olefin resin based on the weight of said polymer, said polyolefin resin selected from the group consisting of polyethylene and polypropylene or mixtures thereof, said sheet having multiaxial flexibility.
Claim 29
Dependent Claim
83 words
A process for preparing a foamed polystyrene sheet by extruding a composition comprising: (A) a polystyrene polymer and based on said polymer, (B) about 2 to 10% by weight of a volatile blowing agent, (C) about 0.2 to 10% by weight a nucleating agent, and (D) about 0.1 to 5.0% by weight of a polyolefin resin selected from the group consisting of polyethylene and polypropylene, into a zone of low pressure to permit foaming of said composi-tion, said foamed sheet having multiaxial flexibility.
Claim 30
Dependent Claim
83 words
A process for preparing a foamed polystyrene sheet by extruding a composition comprising: (A) a polystyrene polymer and based on said polymer, (B) about 2 to 10% by weight of a volatile blowing agent, (C) about 0.2 to 10% by weight a nucleating agent, and (D) about 0.1 to 5.0% by weight of a polyolefin resin selected from the group consisting of polyethylene and polypropylene, into a zone of low pressure to permit foaming of said composi-tion, said foamed sheet having multiaxial flexibility.
References Cited (Backward Citations)
No citation records indexed.
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