US4091162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesives
Assignee: DMWS 176 Ltd A CORP OF SCOTLAND
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Filing: 1976-04-05
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Granted: 1978-05-23
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Expires: 1996-04-05
Abstract
Abstract Adhesive compositions comprising particles which have a core and a shell, the shell being rupturable to release the core material so that an adhesive having two distinct properties arising from the core and shell materials is obtained.
Inventors
- 👤 Neil Kirkpatrick Henderson
- 👤 Eric Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:13
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/14; C; C08; C08J; C08J3/00; C08J3/12; C08J3/124; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J5/00; C09J7/00; C09J7/30; C09J7/38; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/25; Y10T428/254; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
45 words
A delayed-tack adhesive composition comprising core-shell polymers in combination with solid plasticizer means, the core-shell polymers having a soft and tacky polymeric core and a hard and non-tacky polymeric shell, and the solid plasticizer means being means, when melted, to dissolve the hard polymeric shell.
Claim 2
Dependent Claim
45 words
A delayed-tack adhesive composition comprising core-shell polymers in combination with solid plasticizer means, the core-shell polymers having a soft and tacky polymeric core and a hard and non-tacky polymeric shell, and the solid plasticizer means being means, when melted, to dissolve the hard polymeric shell.
Claim 3
Dependent Claim
15 words
A composition according to claim 1 wherein the soft polymeric core comprises an addition polymer.
Claim 4
Dependent Claim
75 words
A composition according to claim 2 wherein the soft polymeric core comprises a low-molecular-weight homopolymer or copolymer of a monomer selected from the group consisting of alkyl acrylate wherein the alkyl has from 3 to 10 carbon atoms, alkyl methacrylate wherein the alkyl has from 5 to 10 carbon atoms, olefin having from 2 to 4 carbon atoms, butadiene, chloroprene, isoprene, and a vinyl ester of a saturated tertiary monocarboxylic acid or a derivative thereof.
Claim 5
Dependent Claim
14 words
A composition according to claim 1 wherein the soft polymeric core comprises low-molecular-weight polymer.
Claim 6
Dependent Claim
15 words
A composition according to claim 1 wherein the hard polymeric shell comprises an addition polymer.
Claim 7
Dependent Claim
55 words
A composition according to claim 5 wherein the hard polymeric shell comprises a high-molecular-weight homopolymer or copolymer of a monomer selected from the group consisting of alkyl methacrylate wherein the alkyl has from 1 to 3 carbon atoms, acrylonitrile, methacrylonitrile, vinyl chloride, vinylidine chloride, vinyl acetate, styrene and a derivative of one of these monomers.
Claim 8
Dependent Claim
14 words
A composition according to claim 1 wherein the hard polymeric core comprises high-molecular-weight polymer.
Claim 9
Dependent Claim
12 words
A substrate coated with a delayed-tack adhesive composition according to claim 1.
References Cited (Backward Citations)
US3978261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |