US3970725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powdery coating composition and process for preparing the same
Assignee: Dai Nippon Toryo Co Ltd
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Filing: 1973-09-25
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Granted: 1976-07-20
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Expires: 1993-09-25
Abstract
Abstract This invention relates to a powdery coating composition having excellent anti-caking ability, which comprises polymer particles having an average particle size of 0.5 to 200μ composed of a polymer having a softening point not exceeding 90°C. as a core component and a polymer having a softening point of at least 100°C. as an outer component covering said core component, and to a process for the preparation of such powdery coating composition.
Inventors
- 👤 Hideyoshi Tugukuni
- 👤 Masafumi Kano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:34
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/006; C08F265/00; C08F265/04; C09; C09D; C09D5/00; C09D5/03; C09D5/031; Y; Y10; Y10S; Y10S524/00; Y10S524/904; Y10S525/00; Y10S525/902; Y10S525/913; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
A powdery coating composition comprising polymer particles having an average particle size within the range of 0.5 to 200μ and composed of, as a core component, an acrylic copolymer having a softening point not exceeding 90°C. and containing 5 to 60% by weight of units of a monomer whose homopolymer has a Tg lower than 0°C. and, as an outer component, an acrylic polymer having a softening point of at least 100°C. and containing at least 60% by weight of units of a monomer whose homopolymer has a Tg higher than 50°C., wherein the weight ratio of the core component to the outer component is within a range from 50/50 to 100/1, and said outer component covers said core component.
Claim 2
Dependent Claim
120 words
A powdery coating composition comprising polymer particles having an average particle size within the range of 0.5 to 200μ and composed of, as a core component, an acrylic copolymer having a softening point not exceeding 90°C. and containing 5 to 60% by weight of units of a monomer whose homopolymer has a Tg lower than 0°C. and, as an outer component, an acrylic polymer having a softening point of at least 100°C. and containing at least 60% by weight of units of a monomer whose homopolymer has a Tg higher than 50°C., wherein the weight ratio of the core component to the outer component is within a range from 50/50 to 100/1, and said outer component covers said core component.
Claim 3
Dependent Claim
43 words
The composition of claim 1 wherein the core component comprises a copolymer of 2-ethylhexyl methacrylate, methyl methacrylate, styrene, 2-hydroxyethyl methacrylate and methacrylic acid and the outer component comprises a copolymer of 2-ethylhexyl methacrylate, N-methylol acrylamide, styrene, methyl methacrylate, butyl methacrylate and methacrylic acid.
Claim 4
Dependent Claim
37 words
The composition of claim 1 wherein the core component comprises a copolymer of ethyl acrylate, lauryl methacrylate, β-hydroxyethyl methacrylate, styrene and butyl methacrylate and the outer component comprises a copolymer of methyl methacrylate, styrene and trimethylamine methacrylamide.
Claim 5
Dependent Claim
33 words
The composition of claim 1 wherein the core component comprises a copolymer of lauryl methacrylate, n-butyl methacrylate and styrene and the outer component comprises a copolymer of methyl methacrylate, styrene and butyl acrylate.
Claim 6
Dependent Claim
30 words
The composition of claim 1 wherein the core component comprises a copolymer of methyl methacrylate and lauryl methacrylate and the outer component comprises a copolymer of methyl methacrylate and styrene.
Claim 7
Dependent Claim
31 words
The composition of claim 1 wherein the core component comprises a copolymer of acrylic acid, ethyl acrylate, methyl acrylate, 2-hydroxyethyl methacrylate and styrene and the outer component comprises poly (methyl methacrylate).
Claim 8
Dependent Claim
39 words
The composition of claim 1 wherein the core component comprises a copolymer of styrene, methyl methacrylate, 2-ethylhexyl acrylate, butyl acrylate and glycidyl methacrylate and the outer component comprises a copolymer of styrene, methyl methacrylate, butyl acrylate and acrylic acid.
References Cited (Backward Citations)
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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) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |