Patent US3872023A successfully refreshed from Google Patents.
US3872023A
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Microcapsules having walls made of copolymer of methylmethacrylate and acetylacetates of mono(meth) acrylates of aliphatic diols
Assignee: BASF SE
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Filing: 1972-04-17
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Granted: 1975-03-18
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Expires: 1992-04-17
Abstract
Abstract The invention relates to microcapsules having a wall material composed of optionally crosslinked copolymers comprising olefinically unsaturated monomers containing hydrophilic groups such as an acetylacetate of a mono(meth) acrylate of an aliphatic diol, and olefinically unsaturated monomers containing hydrophobic groups, such as methyl methacrylate, and a process for the manufacture of microcapsules.
Inventors
- 👤 Guenter Baum
- 👤 Rudolf Bachmann
- 👤 Wolfgang Sliwka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:23
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/12; B01J13/125; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
MICROCAPSULES OF WHICH THE WALL MATERIAL CONSISTS OF A COPOLYMER OF: A. FROM 20 TO 50 PERCENT BY WEIGHT OF METHYL METHACRYLATE, B. FROM 20 TO 50 PERCENT BY WEIGHT OF ACETYLACETATES OF MONO(METH)ACRYLATES OF ALIPHATIC DIOLS OF FROM 2 TO 8 CARBON ATOMS, C. FROM 0 TO 30 PERCENT BY WEIGHT OF ACRYLAMIDE, D. 0 TO 30 PERCENT BY WEIGHT OF ACRYLIC ACID, E. FROM 0 TO 30 PERCENT BY WEIGHT OF VINYL PYRROLIDONE, AND F. FROM 0 TO 30 PERCENT BY WEIGHT OF 2-SULFOETHYL METHACRYLATE; AND THE CORE SUBSTANCE INCLUDES A SOLVENT OR DISPERSING MEMBER SELECTED FROM THE GROUP CONSISTING OF CASTOR OIL, SPERM OIL, OLIVE OIL, PARAFFINS AND WAXES, CHLOROPARAFFINS, CHLORINATED DISPHENYL, LIGHT NAPHTHA, DEROSENE, DIBUTYL PHTHALATE, TRICRESYL PHOSPHATE, BENZENE, TOLUENE, XYLENE, ETHYLHEXYL ACRYLATE, N-BUTYL ACRYYLATE, TBUTYL ACRYLATE, LAURYL ACRYLATE, STYRENE AND OTHER HYDROCARBONS WHICH ARE (1) SOLUBLE IN METHYLENE CHLORIDE; (2) SUBSTANTIALLY INSOLUBLE IN WATER; AND (3) LESS VOLATILE THAN METHYLENE CHLORIDE.
Claim 2
Dependent Claim
156 words
MICROCAPSULES OF WHICH THE WALL MATERIAL CONSISTS OF A COPOLYMER OF: A. FROM 20 TO 50 PERCENT BY WEIGHT OF METHYL METHACRYLATE, B. FROM 20 TO 50 PERCENT BY WEIGHT OF ACETYLACETATES OF MONO(METH)ACRYLATES OF ALIPHATIC DIOLS OF FROM 2 TO 8 CARBON ATOMS, C. FROM 0 TO 30 PERCENT BY WEIGHT OF ACRYLAMIDE, D. 0 TO 30 PERCENT BY WEIGHT OF ACRYLIC ACID, E. FROM 0 TO 30 PERCENT BY WEIGHT OF VINYL PYRROLIDONE, AND F. FROM 0 TO 30 PERCENT BY WEIGHT OF 2-SULFOETHYL METHACRYLATE; AND THE CORE SUBSTANCE INCLUDES A SOLVENT OR DISPERSING MEMBER SELECTED FROM THE GROUP CONSISTING OF CASTOR OIL, SPERM OIL, OLIVE OIL, PARAFFINS AND WAXES, CHLOROPARAFFINS, CHLORINATED DISPHENYL, LIGHT NAPHTHA, DEROSENE, DIBUTYL PHTHALATE, TRICRESYL PHOSPHATE, BENZENE, TOLUENE, XYLENE, ETHYLHEXYL ACRYLATE, N-BUTYL ACRYYLATE, TBUTYL ACRYLATE, LAURYL ACRYLATE, STYRENE AND OTHER HYDROCARBONS WHICH ARE (1) SOLUBLE IN METHYLENE CHLORIDE; (2) SUBSTANTIALLY INSOLUBLE IN WATER; AND (3) LESS VOLATILE THAN METHYLENE CHLORIDE.
Claim 3
Dependent Claim
15 words
Microcapsules as set forth in claim 1, wherein the copolymeric wall material is cured chemically.
Claim 4
Dependent Claim
11 words
Microcapsules as set forth in claim 1 and containing reactive dyes.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |