US4264678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core-shell polymers
Assignee: ISP Investments LLC
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Filing: 1979-05-29
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Granted: 1981-04-28
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Expires: 1999-05-29
Abstract
Abstract Disclosed are improved core-shell polymer compositions and an improved process for applying patterns to textiles by screen printing employing these polymer compositions as binders. The polymer comprises a core of styrene-butadiene copolymer which is at least partially encased by an integral shell of a copolymer of butyl methacrylate and methyl acrylate. When used as a binder in a screen printing process, this composition produces textiles which exhibit a surprisingly desirable combination of the properties of crock fastness, cyclic aging and hand.
Inventors
- 👤 Suzanne Nelsen
- 👤 Edward Wotier
- 👤 Dru Alwani
- 👤 Yehuda Ozari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:28
CPC Classifications
C; C08; C08F; C08F257/00; C08F257/02; C08F279/00; C08F279/02; Y; Y10; Y10S; Y10S525/00; Y10S525/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
141 words
A core-shell polymer composition which comprises discrete particles comprising: (a) 70 to 92% based on the dry weight of the composition of discrete cores of styrene-butadiene copolymer comprising from 20 to 60% by weight of the core of styrene, from 40 to 80% by weight of the core of butadiene and from 0 to 10% by weight of the core of a copolymerizable carboxylic acid; and (b) 8 to 30% based on the dry weight of the composition of shells of a copolymer of butyl methacrylate and methyl acrylate formed integrally with and at least partly covering the cores, the copolymer comprising from 45 to 55% by weight of the shell of butyl methacrylate, from 35 to 45% by weight of the shell of methyl acrylate, and from 0 to 10% based on the weight of the shell of methacrylic acid.
Claim 2
Dependent Claim
141 words
A core-shell polymer composition which comprises discrete particles comprising: (a) 70 to 92% based on the dry weight of the composition of discrete cores of styrene-butadiene copolymer comprising from 20 to 60% by weight of the core of styrene, from 40 to 80% by weight of the core of butadiene and from 0 to 10% by weight of the core of a copolymerizable carboxylic acid; and (b) 8 to 30% based on the dry weight of the composition of shells of a copolymer of butyl methacrylate and methyl acrylate formed integrally with and at least partly covering the cores, the copolymer comprising from 45 to 55% by weight of the shell of butyl methacrylate, from 35 to 45% by weight of the shell of methyl acrylate, and from 0 to 10% based on the weight of the shell of methacrylic acid.
Claim 3
Dependent Claim
46 words
A core-shell polymer composition according to claim 1 wherein the styrene-butadiene copolymer comprises from 20 to 37% styrene, from 53 to 70% butadiene and from 1 to 5% of a combination of itaconic acid and methacrylic acid, all percentages based on the weight of the core.
Claim 4
Dependent Claim
47 words
A core-shell polymer composition according to claim 1 wherein the copolymer of butyl methacrylate and methyl acrylate comprises from 47 to 52% butyl methacrylate, from 37 to 42% methyl acrylate, and from 1 to 5% methacrylic acid, all amounts being based on the weight of the shell.
Claim 5
Dependent Claim
26 words
A core-shell polymer composition according to claim 1 wherein the discrete particles of core-shell polymer have a number average diameter of from 0.1 to 0.5 micron.
Claim 6
Dependent Claim
35 words
A core-shell polymer composition according to claim 4 wherein the discrete particles of core-shell polymer have a ratio of number average diameter to the weight average diameter within the range of from 1.001 to 5.
Claim 7
Dependent Claim
32 words
A core-shell polymer composition according to claim 1 wherein the styrene-butadiene copolymer forming the core comprises from 1 to 5% based on the weight of the core of the copolymerizable carboxylic acid.
Claim 8
Dependent Claim
30 words
A core-shell polymer composition according to claim 1 wherein the copolymerizable carboxylic acid is a member selected from the group consisting of itaconic acid, methacrylic acid and combinations of these.
Claim 9
Dependent Claim
46 words
A core-shell polymer composition according to claim 7 wherein the styrene-butadiene copolymer comprises from 20 to 37% styrene, from 53 to 70% butadiene and from 1 to 5% of a combination of itaconic acid and methacrylic acid, all percentages based on the weight of the core.
Claim 10
Dependent Claim
46 words
A core-shell polymer according to claim 8 wherein the copolymer of butyl methacrylate and methyl acrylate comprises from 47 to 52% butyl methacrylate, from 37 to 42% methyl acrylate, and from 1 to 5% methacrylic acid, all amounts being based on the weight of the shell.
Claim 11
Dependent Claim
79 words
A process for applying colored patterns of a textile comprising the steps of: (a) forming a dispersion of a pigment and a binder comprising a composition according to claim 1 in water; (b) contacting a textile with a screen printing mask having a pattern wherein; (c) passing the dispersion of pigment and binder through the screen and onto the textile in the pattern; and (d) heating the fabric to fuse the binder and fix the pigment to the textile.
Claim 12
Dependent Claim
11 words
A screen print binder comprising the composition defined in claim 1.
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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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |