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US3676387A
Expired / Lapsed
US
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Stable elastomeric polymer-oil combinations
Assignee: 3M Co
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Filing: 1970-12-21
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Granted: 1972-07-11
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Expires: 1990-12-21
Abstract
Abstract A highly elastic synthetic polymer-oil combination meltable at high temperatures for casting from a liquid state, comprising 5 to 30 percent by weight of an unvulcanized elastomeric block copolymer composed of terminal glassy or resinous polymer blocks and a central elastomeric polymer block, and 70 to 95 percent by weight of a stable paraffin oil of low volatility and which has a flash point in excess of the melting temperature of the gel.
Inventors
- 👤 James A Lindlof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
The elastomeric combination of claim 1 wherein each A of said block copolymer is a non-elastomeric polymer block having an average molecular weight of 2,000 - 100,000 and a glass transition temperature above about 25* C., and B is an elastomeric conjugated diene polymer blocK having an average molecular weight greater than about 15,000 and a glass transition temperature below about 10* C., the A content being about 10-50 percent by weight of the copolymer.
Claim 2
Dependent Claim
12 words
The elastomeric combination of claim 2 wherein said oil is mineral oil.
Claim 3
Dependent Claim
140 words
A flexible, soft, polymer-oil elastomeric combination comprising a nonaromatic paraffin oil and a block copolymer of the type A - B- A wherein each A is a thermoplastic polymer block with a glass transition temperature above room temperature having an average molecular weight between about 5,000 and 125,000, the end blocks A of the block copolymer constituting approximately 10-50 percent of the total polymer weight, and B is a polymer block of a conjugated diene having an average molecular weight between about 15,000 and 1,000,000 said oil being uniformly distributed throughout said polymer in an amount sufficient to provide between about 80 to 95 percent by weight oil and 5 to 20 percent by weight of block-copolymer, said combination having a modulus of elasticity of 1 to 10 psi for 200 percent elongation of a 1 square inch cross section.
Claim 4
Dependent Claim
23 words
An elastomeric combination according to claim 4 wherein said combination contains a low melting paraffin wax having a melting point below 130* F.
Claim 5
Dependent Claim
147 words
A flexible, soft polymer-oil elastomeric combination comprising an incompatible, inert liquid oil and block copolymer of the type A - B - A wherein each A is a thermoplastic polymer block with a glass transition temperature above room temperature having an average molecular weight between about 5,000 and 125,000, the end blocks A of the block copolymer constituting approximately 10-50 percent of the total polymer weight, and B is a polymer block of a conjugated diene having an average molecular weight between about 15,000 and 1,000,000, said inert liquid being uniformly distributed throughout said polymer in an amount sufficient to provide between 70-95 percent by weight inert liquid and 5-30 percent of block copolymer, said inert liquid being at least one-half nonaromatic paraffin oil, said combination having a modulus of elasticity of 1 to 10 psi for 200 percent elongation of a 1 square inch cross section.
Claim 6
Dependent Claim
17 words
The combination of claim 6 wherein said inert liquid comprises an incompatible glycol and a paraffin oil.
Claim 7
Dependent Claim
15 words
The combination of claim 6 wherein said inert liquid comprises water and a paraffin oil.
Claim 8
Dependent Claim
157 words
A molded article comprising: a synthetic polymer-oil elastomeric combination which is stable at ambient temperatures and meltable for casting in a liquid state at elevated temperatures, comprising, in combination, 5 to 30 weight percent of an A-B-A type unvulcanized elastomeric block copolymer wherein each A block is a glassy or resinous, non-elastomeric, thermoplastic polymer block with a glass transition temperature above room temperature and having an average molecular weight of between about 2,000 and 100,000, the end blocks A of the block copolymer constituting approximately 10-50 percent of the total polymer weight, and the B block is an elastomeric polymer block of a conjugated diene having an average molecular weight between about 15,000 and 1,000,000 and having a glass transition temperature below that of the A block; and 70-95 weight percent of a stable, nonaromatic paraffin oil of low volatility and having a boiling point in excess of the melting temperature of the said elastomeric block copolymer.
Claim 9
Dependent Claim
12 words
The molded article of claim 9 wherein said oil is mineral oil.
References Cited (Backward Citations)
US3265765A
Cited
US3239478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |