Patent US3991002A successfully refreshed from Google Patents.
US3991002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primer for oily surfaces
Assignee: 3M Co
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Filing: 1975-02-21
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Granted: 1976-11-09
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Expires: 1995-02-21
Abstract
Abstract Oily or other difficultly adherable surfaces are rendered receptive to pressure-sensitive adhesives when sprayed or coated with an organic solvent solution or dispersion of certain rubbery block copolymers and an unusually large amount of thermoplastic resin, preferably a blend in which at least one resin is compatible with each block of the copolymer.
Inventors
- 👤 James L. Sadlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:28
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; Y; Y10; Y10S; Y10S524/00; Y10S524/903; Y10S525/00; Y10S525/901; Y10S525/931; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
151 words
A primer composition for rendering oily and greasy surfaces capable of establishing firm bonds with normally tacky and pressure-sensitive adhesives, comprising in combination an organic solvent solution or stable dispersion of a rubber-resin blend, the solids thereof consisting essentially of, on a weight basis, a. 15-35 parts of rubbery polymer consisting essentially of rubbery block copolymer selected from the class consisting of 1. rubbery block copolymer having the general configuration A-B-A wherein a. each A is a thermoplastic polymer block which has a glass transition temperature above 20° C., which is relatively incompatible with the B block and which has an average molecular weight between about 5,000 and 125,000; b. is an elastomeric polymer block of a conjugated diene, having an average molecular weight between about 15,000 and 250,000; c. the total weight of the A block is less than about 80% of the weight of the block copolymer, and 2.
Claim 2
Dependent Claim
151 words
A primer composition for rendering oily and greasy surfaces capable of establishing firm bonds with normally tacky and pressure-sensitive adhesives, comprising in combination an organic solvent solution or stable dispersion of a rubber-resin blend, the solids thereof consisting essentially of, on a weight basis, a. 15-35 parts of rubbery polymer consisting essentially of rubbery block copolymer selected from the class consisting of 1. rubbery block copolymer having the general configuration A-B-A wherein a. each A is a thermoplastic polymer block which has a glass transition temperature above 20° C., which is relatively incompatible with the B block and which has an average molecular weight between about 5,000 and 125,000; b. is an elastomeric polymer block of a conjugated diene, having an average molecular weight between about 15,000 and 250,000; c. the total weight of the A block is less than about 80% of the weight of the block copolymer, and 2.
Claim 3
Dependent Claim
62 words
radial teleblock copolymer consisting of several polystyrene-terminated elastomeric branches, each of said branches being a homopolymer of a conjugated diene extending from a central hub; and b. correspondingly 85-65 parts of resinous components, 1. about 15-85% of said resinous components, being characterized by compatibility with a homopolymer formed from said conjugated diene 2. the balance of said resinous components being characterized by
Claim 4
Dependent Claim
62 words
radial teleblock copolymer consisting of several polystyrene-terminated elastomeric branches, each of said branches being a homopolymer of a conjugated diene extending from a central hub; and b. correspondingly 85-65 parts of resinous components, 1. about 15-85% of said resinous components, being characterized by compatibility with a homopolymer formed from said conjugated diene 2. the balance of said resinous components being characterized by
Claim 5
Dependent Claim
28 words
compatibility with polystyrene. 2. The composition of claim 1 wherein about 30-75% of the resinous components are characterized by compatibility with a homopolymer formed from said conjugated diene.
Claim 6
Dependent Claim
83 words
In an organic solvent solution or dispersion of a rubbery block copolymer selected from the class consisting of 1. rubbery block copolymer having the general configuration A-B-A wherein a. Each A is polystyrene having a molecular weight between about 5,000 and 125,000; b. B is a monopolymer of butadiene or isoprene, having an average molecular weight between about 15,000 and 250,000; and c. the total weight of the A blocks is less than about 80% of the weight of the block copolymer, and
Claim 7
Dependent Claim
83 words
In an organic solvent solution or dispersion of a rubbery block copolymer selected from the class consisting of 1. rubbery block copolymer having the general configuration A-B-A wherein a. Each A is polystyrene having a molecular weight between about 5,000 and 125,000; b. B is a monopolymer of butadiene or isoprene, having an average molecular weight between about 15,000 and 250,000; and c. the total weight of the A blocks is less than about 80% of the weight of the block copolymer, and
Claim 8
Dependent Claim
85 words
radial teleblock copolymer consisting of several polystyrene-terminated elastomeric branches, each of said branches being a homopolymer of a conjugated diene from a central hub, a first thermoplastic resin compatible with polystyrene and a second thermoplastic resin compatible with said homopolymer, the improvement which comprises a resin: copolymer weight ratio in the ragne of 85:15 - 64:35, whereby said solution possesses the ability to function as a primer composition for rendering oily and greasy surfaces capable of establishing firm bonds with normally tacky and pressure-sensitive adhesives.
Claim 9
Dependent Claim
85 words
radial teleblock copolymer consisting of several polystyrene-terminated elastomeric branches, each of said branches being a homopolymer of a conjugated diene from a central hub, a first thermoplastic resin compatible with polystyrene and a second thermoplastic resin compatible with said homopolymer, the improvement which comprises a resin: copolymer weight ratio in the ragne of 85:15 - 64:35, whereby said solution possesses the ability to function as a primer composition for rendering oily and greasy surfaces capable of establishing firm bonds with normally tacky and pressure-sensitive adhesives.
Claim 10
Dependent Claim
20 words
The composition of claim 3 wherein the first resin:second resin weight ratio is in the range of 85:15 to 15:85.
Claim 11
Dependent Claim
13 words
The composition of claim 4 wherein an effective amount of anti-oxidant is present.
Claim 12
Dependent Claim
10 words
The composition of claim 5 wherein said B is polybutadiene.
Claim 13
Dependent Claim
80 words
The composition of claim 6 wherein the organic solvent constitutes about 2/3 the weight of the solution, about 10% of the solvent being toluene, the balance of the solvent consisting essentially of approximately equal weights of methyl ethyl ketone, acetone and heptane; the solids portion consisting essentially of about 20-25% of a butadiene:styrene radial teleblock copolymer, 55-60% stabilized ester resin, about 20-25% cycloaliphatic petroleum hydrocarbon resin and about 0.2 - 0.5% anti-oxidant; all percentages being taken on a weight basis.
Claim 14
Dependent Claim
10 words
The composition of claim 5 wherein said B is polyisoprene.
Claim 15
Dependent Claim
41 words
The composition of claim 4 wherein the solution is packaged in an aerosol container, together with propellants selected from the class consisting of low molecular weight hydrocarbon and halogenated hydrocarbon having a boiling point below about 25° C., to facilitate application.
Claim 16
Dependent Claim
26 words
The composition of claim 9 wherein the solvent comprises toluene, the propellant comprises aliphatic hydrocarbons, and methylene chloride is present, functioning as both solvent and propellant.
Claim 17
Dependent Claim
77 words
The composition of claim 9 wherein the solids present constitute about 20% of the weight of the composition, and the balance is made up of organic solvents and propellants; said solids including an effective amount of anti-oxidant and consisting essentially of about 20% of butadiene:styrene radial teleblock copolymer, about 50% stabilized ester resin, about 30% cycloaliphatic petroleum hydrocarbon resin; said balance consisting essentially of about 5% toluene, about 65% dichloromethane, about 5% propane, and about 25% isobutane.
Claim 18
Dependent Claim
60 words
The method of priming an oily surface to which tacky and pressure-sensitive adhesives do not normally bond firmly comprising applying to said surface the composition of claim 1 and allowing the solvent to evaporate, whereby normally tacky and pressure-sensitive adhesive tape applied to the prime surface requires a force of at least 900 grams per centimeter of width for removal.
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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) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |