US4394473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber compounding bags and film made from syndiotactic 1,2-polybutadiene
Assignee: Presto Products Inc
•
Filing: 1981-10-06
•
Granted: 1983-07-19
•
Expires: 2001-10-06
Abstract
Abstract Bales of unvulcanized rubber, vulcanized rubber or compounding ingredients for unvulcanized rubber are packaged in film or bags made from syndiotactic 1,2-polybutadiene (1,2-SBD) containing at least one antiblock agent additive and at least one slip agent additive. Coextrusion can be used to manufacture bags or film having two or more layers where only the inside layer is heavily loaded with antiblock additives and the outside layer contains only a minimal amount of antiblock additives with both layers containing slip agents. The use of 1,2-SBD serves to eliminate the problems of incompatibility and disposal encountered in the prior art and provides film and bags having superior puncture and tear resistance when compared to a conventional material such as polyethylene.
Inventors
- 👤 John P. Winter
- 👤 Mladomir Tomic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:19
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/223; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K5/16; C08K5/20; C08J2321/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1386
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
91 words
A package which comprises (A) an article selected from at least one of unvulcanized or vulcanized rubber or compounding ingredients for unvulcanized rubber packaged in (B) a bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the thickness of said bag or film being in the range of about 0.5 to about 10 mils.
Claim 2
Dependent Claim
91 words
A package which comprises (A) an article selected from at least one of unvulcanized or vulcanized rubber or compounding ingredients for unvulcanized rubber packaged in (B) a bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the thickness of said bag or film being in the range of about 0.5 to about 10 mils.
Claim 3
Dependent Claim
48 words
The package of claim 1, wherein the antiblock agent is selected from the group consisting of diatomaceous earths, talcs, amorphous and fumed silicas, inorganic metal salts, polyoxyethylene fatty alcohols, wollastonites, glass particles, perlites, mica, titanates, hydrated alumina, various forms of carbon, fluoroplastics, polyvinyl alcohols, polysiloxanes, clays and silicates.
Claim 4
Dependent Claim
26 words
The package of claim 1, wherein the slip agent is a fatty acid selected from the group consisting of behenic acid, stearic acid and arachidic acid.
Claim 5
Dependent Claim
26 words
The package of claim 1, wherein the slip agent is a fatty acid amide selected from the group consisting of oleamide, erucamide, stearamide and ethylene bisoleamide.
Claim 6
Dependent Claim
12 words
The package of claim 1, wherein the slip agent is zinc stearate.
Claim 7
Dependent Claim
18 words
The package of claim 1, wherein the slip agent is an approximately equal mixture of erucamide and stearamide.
Claim 8
Dependent Claim
14 words
The package of claim 6, wherein the antiblock agent is diatomaceous earth or talc.
Claim 9
Dependent Claim
50 words
The package of claim 7, wherein the syndiotactic 1,2-polybutadiene contains about 3 to 7% by weight of diatomaceous earth or about 4 to 6% by weight of talc as the antiblock agent and about 1 to 2% by weight of said mixture of erucamide and stearamide as the slip agent.
Claim 10
Dependent Claim
18 words
The package of claim 1, wherein the packaged article is at least one compounding ingredient for unvulcanized rubber.
Claim 11
Dependent Claim
102 words
The package of claim 9, wherein the compounding ingredients are selected from at least one of clay, silicates, calcium carbonate, cadmium diethyldithiocarbamate, tetramethylthiuram disulfide, benzothiazyl disulfide, substituted thio esters and amine type antioxidants; aniline antiozonant derivatives; diamine and/or thiourea curing agents selected from sulfur, sulfur providing compounds and peroxides; ultraviolet agents selected from substituted benzotriazoles and substituted benzophenones; coloring pigments selected from iron oxide, titanium dioxides and organic dyes; reinforcing pigments selected from carbon black, zinc oxide and hydrated silicon compounds; silicon dioxide; and a minor amount of a rubber processing oil when mixed with at least one of said compounding ingredients.
Claim 12
Dependent Claim
19 words
The package of claim 1, wherein the thickness of said bag or film is about 1 to 3 mils.
Claim 13
Dependent Claim
12 words
The package of claim 1, wherein said article is an unvulcanized rubber.
Claim 14
Dependent Claim
90 words
A compounded rubber comprised of a mixture of an unvulcanized rubber and a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the thickness of said bag or film being in the range of about 0.5 to about 10 mils.
Claim 15
Dependent Claim
90 words
A compounded rubber comprised of a mixture of an unvulcanized rubber and a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the thickness of said bag or film being in the range of about 0.5 to about 10 mils.
Claim 16
Dependent Claim
56 words
The compounded rubber of claim 13, wherein the unvulcanized rubber is at least one member selected from the group consisting of natural rubber, synthetic cis-1,4-polyisoprene, polybutadiene, rubbery copolymers of 1,3-butadiene and styrene, rubbery copolymers of butadiene and acrylonitrile, butyl rubber, rubbery copolymers of ethylene and propylene and rubbery terpolymers of ethylene, propylene and a copolymerizable diene.
Claim 17
Dependent Claim
10 words
The sulfur or peroxide cured compounded rubber of claim 14.
Claim 18
Dependent Claim
10 words
The sulfur or peroxide cured compounded rubber of claim 13.
Claim 19
Dependent Claim
79 words
A packaged unvulcanized rubber which comprises said unvulcanized rubber substantially encompassed with a wrap or bag of a protective film having a thickness in the range of about 0.5 to about 10 mils, said film being made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof.
Claim 20
Dependent Claim
79 words
A packaged unvulcanized rubber which comprises said unvulcanized rubber substantially encompassed with a wrap or bag of a protective film having a thickness in the range of about 0.5 to about 10 mils, said film being made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof.
Claim 21
Dependent Claim
48 words
The package of claim 17, wherein the antiblock agent is selected from the group consisting of diatomaceous earths, talcs, amorphous and fumed silicas, inorganic metal salts, polyoxyethylene fatty alcohols, wollastonites, glass particles, perlites, mica, titanates, hydrated alumina, various forms of carbon, fluoroplastics, polyvinyl alcohols, polysiloxanes, clays and silicates.
Claim 22
Independent Claim
130 words
A method of compounding rubber which comprises mixing unvulcanized rubber with a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a coextruded bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the total thickness of said bag or film being in the range of about 0.5 to about 10 mils, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.
Claim 23
Independent Claim
130 words
A method of compounding rubber which comprises mixing unvulcanized rubber with a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a coextruded bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the total thickness of said bag or film being in the range of about 0.5 to about 10 mils, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.
Claim 24
Dependent Claim
118 words
The method of claim 19, wherein the unvulcanized rubber is contained in a wrap or bag of a protective film having a thickness in the range of about 0.5 to about 10 mils, said film being made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.
Claim 25
Dependent Claim
132 words
A package which comprises (A) an article selected from at least one of unvulcanized or vulcanized rubber or compounding ingredients for unvulcanized rubber packaged in (B) a coextruded bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the total thickness of said bag or film being in the range of about 0.5 to about 10 mils, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.
Claim 26
Dependent Claim
132 words
A package which comprises (A) an article selected from at least one of unvulcanized or vulcanized rubber or compounding ingredients for unvulcanized rubber packaged in (B) a coextruded bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the total thickness of said bag or film being in the range of about 0.5 to about 10 mils, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.
Claim 27
Dependent Claim
48 words
The package of claim 21, wherein the antiblock agent is selected from the group consisting of diatomaceous earths, talcs, amorphous and fumed silicas, inorganic metal salts, polyoxyethylene fatty alcohols, wollastonites, glass particles, perlites, mica, titanates, hydrated alumina, various forms of carbon, fluoroplastics, polyvinyl alcohols, polysiloxanes, clays and silicates.
Claim 28
Dependent Claim
60 words
The package of claim 21, wherein the inside layer of the coextruded bag or film contains about 3 to 8% by weight of antiblock agent and about 0.5 to 3% by weight of slip agent and the outside layer thereof contains about 0.5 to 3% by weight of slip agent and about 1 to 4% by weight of antiblock agent.
Claim 29
Dependent Claim
60 words
The package of claim 21, wherein the inside layer of the coextruded bag or film contains about 4 to 7% by weight of antiblock agent and about 1 to 2% by weight of slip agent and the outside layer thereof contains about 1 to 2% by weight of slip agent and about 1 to 3% by weight of antiblock agent.
Claim 30
Dependent Claim
32 words
The package of claim 21, wherein said inside layer comprises about 10 to 40% and said outside layer comprises about 60 to 90% of the total thickness of said bag or film.
Claim 31
Dependent Claim
26 words
The package of claim 21, wherein the slip agent is a fatty acid selected from the group consisting of behenic acid, stearic acid and arachidic acid.
Claim 32
Dependent Claim
26 words
The package of claim 21, wherein the slip agent is a fatty acid amide selected from the group consisting of oleamide, erucamide, stearamide and ethylene bisoleamide.
Claim 33
Dependent Claim
12 words
The package of claim 21, wherein the slip agent is zinc stearate.
Claim 34
Dependent Claim
18 words
The package of claim 21, wherein the slip agent is an approximately equal mixture of erucamide and stearamide.
Claim 35
Dependent Claim
14 words
The package of claim 29, wherein the antiblock agent is diatomaceous earth or talc.
Claim 36
Dependent Claim
54 words
The package of claim 30, wherein said inside layer contains about 3 to 8% by weight of antiblock agent and about 0.5 to 3% by weight of slip agent and the outside layer thereof contains about 0.5 to 3% by weight of slip agent and about 1 to 4% by weight of antiblock agent.
Claim 37
Dependent Claim
54 words
The package of claim 30, wherein said inside layer contains about 4 to 7% by weight of antiblock agent and about 1 to 2% by weight of slip agent and the outside layer thereof contains about 1 to 2% by weight of slip agent and about 1 to 3% by weight of antiblock agent.
Claim 38
Dependent Claim
18 words
The package of claim 21, wherein the packaged article is at least one compounding ingredient for unvulcanized rubber.
Claim 39
Dependent Claim
102 words
The package of claim 33, wherein the compounding ingredients are selected from at least one of clay, silicates, calcium carbonate, cadmium diethyldithiocarbamate, tetramethylthiuram disulfide, benzothiazyl disulfide, substituted thio esters and amine type antioxidants; aniline antiozonant derivatives; diamine and/or thiourea curing agents selected from sulfur, sulfur providing compounds and peroxides; ultraviolet agents selected from substituted benzotriazoles and substituted benzophenones; coloring pigments selected from iron oxide, titanium dioxides and organic dyes; reinforcing pigments selected from carbon black, zinc oxide and hydrated silicon compounds; silica dioxide; and a minor amount of a rubber processing oil when mixed with at least one of said compounding ingredients.
Claim 40
Dependent Claim
19 words
The package of claim 21, wherein the thickness of said bag or film is about 1 to 3 mils.
Claim 41
Dependent Claim
12 words
The package of claim 21, wherein said article is an unvulcanized rubber.
Claim 42
Dependent Claim
131 words
A compounded rubber comprised of a mixture of an unvulcanized rubber and a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a coextruded bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the total thickness of said bag or film being in the range of about 0.5 to about 10 mils, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.
Claim 43
Dependent Claim
131 words
A compounded rubber comprised of a mixture of an unvulcanized rubber and a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a coextruded bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the total thickness of said bag or film being in the range of about 0.5 to about 10 mils, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.
Claim 44
Dependent Claim
56 words
The compounded rubber of claim 37, wherein the unsaturated rubber is at least one member selected from the group consisting of natural rubber, synthetic cis-1,4-polyisoprene, polybutadiene, rubbery copolymers of 1,3-butadiene and styrene, rubbery copolymers of butadiene and acrylonitrile, butyl rubber, rubbery copolymers of ethylene and propylene and rubbery terpolymers of ethylene, propylene and a copolymerizable diene.
Claim 45
Dependent Claim
118 words
A packaged unvulcanized rubber which comprises said unvulcanized rubber substantially encompassed with a wrap or bag of a protective film having a thickness in the range of about 0.5 to about 10 mils, said film being made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.
Claim 46
Dependent Claim
118 words
A packaged unvulcanized rubber which comprises said unvulcanized rubber substantially encompassed with a wrap or bag of a protective film having a thickness in the range of about 0.5 to about 10 mils, said film being made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.
Claim 47
Dependent Claim
48 words
The package of claim 39, wherein the antiblock agent is selected from the group consisting of diatomaceous earths, talcs, amorphous and fumed silicas, inorganic metal salts, polyoxyethylene fatty alcohols, wollastonites, glass particles, perlites, mica, titanates, hydrated alumina, various forms of carbon, fluoroplastics, polyvinyl alcohols, polysiloxanes, clays and silicates.
Claim 48
Independent Claim
89 words
A method of compounding rubber which comprises mixing unvulcanized rubber with a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the thickness of said bag or film being in the range of about 0.5 to about 10 mils.
Claim 49
Independent Claim
89 words
A method of compounding rubber which comprises mixing unvulcanized rubber with a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the thickness of said bag or film being in the range of about 0.5 to about 10 mils.
Claim 50
Dependent Claim
79 words
The method of claim 41, wherein the unvulcanized rubber is contained in a wrap or bag of a protective film having a thickness in the range of about 0.5 to about 10 mils, said film being made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof.
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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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |