Patent US4071975A successfully refreshed from Google Patents.
US4071975A
Expired / Lapsed
US
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Method of promoting the growth of plants
Assignee: Daicel Corp
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Filing: 1976-04-12
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Granted: 1978-02-07
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Expires: 1996-04-12
Abstract
Abstract A method of promoting the growth of plants which comprises applying to the surface of a plant growth medium to be exposed to a source of ultraviolet radiation a light-degradable mulching film for agricultural use, comprising a resin composition, whose resin components consist essentially of (1) FROM 5 TO 50 PERCENT BY WEIGHT OF POLYISOBUTYLENE OXIDE RESIN, (2) THE BALANCE OF A SECOND RESIN COMPONENT SELECTED FROM THE GROUP CONSISTING OF AT LEAST ONE POLYOLEFIN RESIN AND A MIXTURE OF AT LEAST ONE POLYOLEFIN RESIN AND AT LEAST ONE POLYDIENE RESIN.
Inventors
- 👤 Kazunobu Tanaka
- 👤 Masahiko Kusumoto
- 👤 Shoji Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 23:02
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/30; A01G13/32; A01G13/33; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/10; C08L23/16; C08L71/00; C08L71/02; C08L2205/00; C08L2205/03; C08L23/08; C08L23/0846; C08L23/0853; C08L23/18; C08L23/20; C08L23/22; C08L9/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
A method of promoting the growth of plants which comprises applying to the surface of a plant growth medium to be exposed to a source of ultraviolet radiation a pre-formed light-degradable mulching film for agricultural use, said film being made of a resin composition whose resin components consist essentially of (1) from 5 to 50 percent by weight of polyisobutylene oxide resin having a reduced specific viscosity of at least about 0.8 dl/g. determined at 120° C in o-dichlorobenzene, (2) the balance is a second resin component selected from the group consisting of (a) at least one polyolefin resin and (b) a mixture of at least one polyolefin resin and at least one polydiene resin, said film being capable of being transformed to a friable or pulverized form by the action of sunlight in from 15 to 90 days.
Claim 2
Independent Claim
139 words
A method of promoting the growth of plants which comprises applying to the surface of a plant growth medium to be exposed to a source of ultraviolet radiation a pre-formed light-degradable mulching film for agricultural use, said film being made of a resin composition whose resin components consist essentially of (1) from 5 to 50 percent by weight of polyisobutylene oxide resin having a reduced specific viscosity of at least about 0.8 dl/g. determined at 120° C in o-dichlorobenzene, (2) the balance is a second resin component selected from the group consisting of (a) at least one polyolefin resin and (b) a mixture of at least one polyolefin resin and at least one polydiene resin, said film being capable of being transformed to a friable or pulverized form by the action of sunlight in from 15 to 90 days.
Claim 3
Dependent Claim
27 words
A method as claimed in claim 1 in which said resin component is a mixture of at least one polyolefin resin and at least one polydiene resin.
Claim 4
Dependent Claim
56 words
A method as claimed in claim 2, in which said polyolefin resin is selected from the group consisting of polyethylene, polypropylene, polybutene-1, poly-4-methylpentene-1, polyisobutylene, ethylene-propylene copolymers, ethylene-vinyl acetate copolymers, ethylene-vinyl chloride copolymers, ethylene-acrylic said copolymers, copolymers and mixtures thereof, and said polydiene resin is selected from the group consisting of poly-1,4-butadiene, poly-cis-1,2-butadiene, polyisoprene and copolymers thereof.
Claim 5
Dependent Claim
42 words
A method as claimed in claim 2 in which the film additionally contains from 0.01 to 5 parts by weight, per 100 parts by weight of the sum of (1) and (2), of an ultraviolet light sensitizer or an ultraviolet light absorber.
Claim 6
Dependent Claim
84 words
A method as claimed in claim 4, in which said ultraviolet light sensitizer as selected from the group consisting of benzophenone, p-benzoquinone, naphthoquinone, anthraquinone, β-methyl anthraquinone, 1,2-benzanthraquinone, o-nitro benzaldehyde, nitro naphthalene, acetylacetone copper chelate, acetylacetone cobalt chelate, acetylacetone nickel chelate, and acetylacetone manganese chelate, and said ultraviolet light absorber is selected from the group consisting of phenyl salicylate, 4-tertiary butyl phenyl salicylate, p-octyl phenyl salicylate, 2-hydroxy-4-methoxy benzophenone, 5-chloro-2-hydroxy benzophenone, 2-hydroxy-4-methoxy-2-carboxy benzophenone, 2,2'-dihydroxy-4,4'-dimethoxy benzophenone, 2 (2'-hydroxy-5'-methyl phenyl)-benzotriazole, 2'-(2-hydroxy-3'-tertiary butyl-5'-methyl phenyl)-5-chloro benzotriazole, and 2-(2'-hydroxy-3',5'-ditertiary butyl phenyl)-5-chlorobenzotriazole.
Claim 7
Dependent Claim
39 words
A method as claimed in claim 2, in which the resin components of the film consist esssentially of 30 percent by weight of said polyisobutylene oxide, 50 percent by weight of polypropylene and 20 percent by weight of poly-cis-1,2-butadiene.
Claim 8
Dependent Claim
19 words
A method as claimed in claim 1 in which said resin component (2) is at least one polyolefin resin.
Claim 9
Dependent Claim
39 words
A method as claimed in claim 7, in which said polyolefin resin is selected from the group consisting of polyethylene, polypropylene, polybutene-1, poly-4-methylpentene-1, polyisobutylene, ethylene-propylene copolymers, ethylene-vinyl acetate copolymers, ethylene-vinyl chloride copolymers, ethylene-acrylic acid copolymers, copolymers and mixtures thereof.
Claim 10
Dependent Claim
42 words
A method as claimed in claim 7 in which the film additionally contains from 0.01 to 5 parts by weight, per 100 parts by weight of the sum of (1) and (2), of an ultraviolet light sensitizer or an ultraviolet light absorber.
Claim 11
Dependent Claim
84 words
A method as claimed in claim 9, in which said ultraviolet light sensitizer is selected from the group consisting of benzophenone, p-benzoquinone, naphthoquinone, anthraquinone, β-methyl anthraquinone 1,2-benzanthraquinone, o-nitro benzaldehyde, nitro naphthalene, acetylacetone copper chelate, acetylacetone cobalt chelate, acetylacetone nickel chelate, and acetylacetone manganese chelate, and said ultraviolet light absorber is selected from the group consisting of phenyl salicylate, 4-tertiary butyl phenyl salicylate, p-octyl phenyl salicylate, 2-hydroxy-4-methoxy benzophenone, 5-chloro-2-hydroxy benzophenone, 2-hydroxy-4-methoxy-2-carboxy benzophenone, 2,2'-dihydroxy-4,4'-dimethoxy benzophenone, 2-(2'-hydroxy-5'-methyl phenyl)-benzotriazole, 2-(2'-hydroxy-3'-tertiary butyl-5'-methyl phenyl)-5-chloro benzotriazole, and 2-(2'-hydroxy-3', 5'-ditertiary butyl phenyl)-5-chlorobenzotriazole.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |