Patent US5149726A successfully refreshed from Google Patents.
US5149726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insect resistant foam body useful in farm buildings
Assignee: Dow Chemical Co
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Filing: 1991-12-16
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Granted: 1992-09-22
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Expires: 2011-12-16
Abstract
Abstract The invention is a plastic foam body which is resistant to the boring of insects and is useful in insulating buildings subject to such boring comprising a foamed thermoplastic polymer having a plurality of closed non-interconnecting cells, a minimum cross-sectional dimension of at least 30 mm, the foam body being without discontinuities and substantial variation in average cell size when cell size, wherein the foam body has a density, d, of 40 kg/m 3 or greater, and average cell dimensions of at least 1.0 mm, V, E, and H in three mutually perpendicular directions at least 1.0 mm or greater in the second directions, at least 1.0 mm and 0.9 mm respectively and a resistance factor, R, of 600 or greater as calculated by Formula 1 ##EQU1## In another embodiment of the invention is a method of insulating buildings subject to the boring of insects into the insulation thereof using the plastic foam bodies of the invention.
Inventors
- 👤 Jean-Philippe Deblander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:56
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/149; C08J9/127; C08J9/143; C08J9/144; C08J2203/00; C08J2203/14; C08J2203/142; C08J2325/00; Y; Y10; Y10S; Y10S521/00; Y10S521/91; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249976
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
A plastic foam body comprising a foamed plastic polymer having a plurality of closed non-interconnecting cells, a minimum cross-sectional dimension of at least about 30 mm, and a water vapor permeability not greater than about 1.8 perm inches as measured by ASTM Method C-355-64, Procedures for Desiccant Method, said foam body being without discontinuities and substantial variation in average cell diameter across the minimum cross-sectional dimension of the body by D-2842-69, wherein the foam body has a density, d, of about 40 kg/m 3 or greater, and average cell dimensions V, E, and H in three mutually perpendicular directions of at least about 1.0 mm, at least about 1.0 mm, and at least about 0.9 mm respectively and wherein the value R as calculated by Formula 1 ##EQU5## is at least about 600 and a light transmission through a thickness of about 36 mm of about 20 percent.
Claim 2
Dependent Claim
148 words
A plastic foam body comprising a foamed plastic polymer having a plurality of closed non-interconnecting cells, a minimum cross-sectional dimension of at least about 30 mm, and a water vapor permeability not greater than about 1.8 perm inches as measured by ASTM Method C-355-64, Procedures for Desiccant Method, said foam body being without discontinuities and substantial variation in average cell diameter across the minimum cross-sectional dimension of the body by D-2842-69, wherein the foam body has a density, d, of about 40 kg/m 3 or greater, and average cell dimensions V, E, and H in three mutually perpendicular directions of at least about 1.0 mm, at least about 1.0 mm, and at least about 0.9 mm respectively and wherein the value R as calculated by Formula 1 ##EQU5## is at least about 600 and a light transmission through a thickness of about 36 mm of about 20 percent.
Claim 3
Dependent Claim
17 words
A foam body according to claim 1 wherein the light transmission is about 25 percent or greater.
Claim 4
Dependent Claim
16 words
A foam body according to claim 2 wherein the resistance factor is about 700 or greater.
Claim 5
Dependent Claim
17 words
A foam body according to claim 3 wherein the density is about 45 kg/m 2 or greater.
Claim 6
Dependent Claim
21 words
A foam body according to claim 4 wherein the thermoplastic polymer comprises an alkenyl aromatic polymer, a polyurethane or a polyolefin.
Claim 7
Dependent Claim
13 words
A foam body according to claim 5 wherein the thermoplastic polymer comprises polystyrene.
Claim 8
Dependent Claim
162 words
A plastic foam body comprising a foamed plastic polymer having a plurality of closed non-interconnecting cells, a minimum cross-sectional dimension of at least about 30 mm, and a water vapor permeability not greater than about 1.8 perm inches as measured by ASTM Method C-355-64, Procedures for Desiccant Method, said foam body being without discontinuities and substantial variation in average cell size when cell size is measured by averaging cell diameter across the minimum cross-sectional dimension of the body by ASTM Method D-2842-69, wherein the foam body has a density of 40 kg/m 3 or greater, a light transmission of about 15 percent or greater when measured through a 36 mm thickness with a lux meter, and average cell dimensions V, E, and H in three mutually perpendicular directions of at least about 1.0 mm, at least about 1.0 mm and at least about 0.9 mm respectively, and wherein the value R as calculated by Formula 1 ##EQU6## is about 1000 or greater.
Claim 9
Dependent Claim
162 words
A plastic foam body comprising a foamed plastic polymer having a plurality of closed non-interconnecting cells, a minimum cross-sectional dimension of at least about 30 mm, and a water vapor permeability not greater than about 1.8 perm inches as measured by ASTM Method C-355-64, Procedures for Desiccant Method, said foam body being without discontinuities and substantial variation in average cell size when cell size is measured by averaging cell diameter across the minimum cross-sectional dimension of the body by ASTM Method D-2842-69, wherein the foam body has a density of 40 kg/m 3 or greater, a light transmission of about 15 percent or greater when measured through a 36 mm thickness with a lux meter, and average cell dimensions V, E, and H in three mutually perpendicular directions of at least about 1.0 mm, at least about 1.0 mm and at least about 0.9 mm respectively, and wherein the value R as calculated by Formula 1 ##EQU6## is about 1000 or greater.
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