US4131572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder coatings containing copolymer containing isobornyl methacrylate as melt flow modifier
Assignee: Rohm and Haas Co
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Filing: 1975-05-16
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Granted: 1978-12-26
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Expires: 1995-05-16
Abstract
Abstract Low molecular weight copolymers of (1) acrylic acid esters or methacrylic acid esters of alcohols such as methanol with (2) esters of bicyclic alcohols such as isobornyl alcohol and unsaturated acids such as methacrylic acid, as contrasted with high molecular weight copolymers of such monomers (1) and (2) (see U.S. patent No. 3,485,775) and as contrasted to other acrylic polymers, are found to be exceptional in compatibility with practically all types of hard coating resins, and to lower the flow temperature of the mixture when using powder coating methods such as an electrostatic spray or a fluidized bed, electrostatic or not, as compared with the use of the hard coating resin alone.
Inventors
- 👤 William H. Brendley, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:16
CPC Classifications
C; C09; C09D; C09D133/00; Y; Y10; Y10S; Y10S524/00; Y10S524/904; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
173 words
A fluidizable powder coating composition, the particles of which are from about 10 to about 500 microns in diameter, a mixture of (A) about 3 to 10 parts by weight of a melt flow-modifying copolymer of about 40 percent to 60 percent by weight of a compound of the formula: ##STR9## where R is selected from the group consisting of --CH 2 --, --CH(CH 3 )--, and --C(CH 3 ) 2 --, and M is selected from the group consisting of a hydrogen atom and at least one methyl group, and 40 percent to 60 percent by weight of styrene, vinyl toluene, or at least one ester of acrylic acid or methacrylic acid and an aromatic, monocyclic aliphatic, or open chain aliphatic alcohol or alkoxy alcohol having from 1 to about 18 carbon atoms, or combinations thereof, said copolymer having an average molecular weight of from 1,000 to 8,500, and (B) 90 to 97 parts by weight of a thermoplastic coating resin selected from the group consisting of cellulose esters, polyvinylhalides, and acrylics.
Claim 2
Dependent Claim
173 words
A fluidizable powder coating composition, the particles of which are from about 10 to about 500 microns in diameter, a mixture of (A) about 3 to 10 parts by weight of a melt flow-modifying copolymer of about 40 percent to 60 percent by weight of a compound of the formula: ##STR9## where R is selected from the group consisting of --CH 2 --, --CH(CH 3 )--, and --C(CH 3 ) 2 --, and M is selected from the group consisting of a hydrogen atom and at least one methyl group, and 40 percent to 60 percent by weight of styrene, vinyl toluene, or at least one ester of acrylic acid or methacrylic acid and an aromatic, monocyclic aliphatic, or open chain aliphatic alcohol or alkoxy alcohol having from 1 to about 18 carbon atoms, or combinations thereof, said copolymer having an average molecular weight of from 1,000 to 8,500, and (B) 90 to 97 parts by weight of a thermoplastic coating resin selected from the group consisting of cellulose esters, polyvinylhalides, and acrylics.
Claim 3
Dependent Claim
19 words
The composition of claim 1 in which the coating resin particles are from 50 to 200 microns in size.
Claim 4
Dependent Claim
25 words
The composition of claim 1 in which the Tg of a homopolymer of said acrylic acid or methacrylic acid ester is at least 10° C.
Claim 5
Dependent Claim
45 words
The composition of claim 1 in which the melt flow-modifying polymer or the coating resin, or each, contains a finite amount, the total being up to about 5 percent by weight of total monomers, of one or more of a copolymerized ethylenically unsaturated polar monomer.
Claim 6
Dependent Claim
15 words
The composition of claim 3 in which said ester is an ester of methacrylic acid.
Claim 7
Dependent Claim
72 words
The composition of claim 1 in which said melt flow-modifying copolymer consists essentially of 45 percent to 55 percent of at least one of styrene, methyl acrylate, or an ester of methacrylic acid with an alkanol having from 1 to 4 carbon atoms and isobornyl methacrylate in an amount of about 45 percent to 55 percent, and in which the average molecular weight of the polymer is between about 2,000 and 3,000.
Claim 8
Dependent Claim
45 words
The composition of claim 6 in which the melt flow-modifying copolymer consists of isobornyl methacrylate and methyl methacrylate, and optionally, up to a total of 5 percent of one or more of an alkylaminoalkyl acrylate or methacrylate and acrylic acid, methacrylic acid, or itaconic acid.
Claim 9
Dependent Claim
12 words
A coating containing the fused copolymer of claim 1, on a substrate.
Claim 10
Dependent Claim
12 words
A coating containing the fused copolymer of claim 5, on a substrate.
Claim 11
Dependent Claim
22 words
The powder coating composition of claim 1 in which the coating resin is an acrylic resin having a Tg above 10° C.
Claim 12
Dependent Claim
21 words
The composition of claim 10 in which said acrylic resin contains at least about 95% by weight of polymerized methyl methacrylate.
Claim 13
Dependent Claim
154 words
A fluidizable powder coating composition the particles of which are from about 50 to about 200 microns in diameter in the form of a mixture of (A) a melt flow modifying amount of the copolymer of about 40% to 60% by weight of the compound of the formula ##STR10## where R is selected from the group consisting of --CH 2 --, --CH(CH 3 )--, and --C(CH 3 ) 2 --, and M is selected from the group consisting of a hydrogen atom and at least one methyl group, and 40 percent to 60 percent by weight of styrene, vinyl toluene, or at least one ester of acrylic acid or methacrylic acid and an aromatic, monocyclic aliphatic, or open chain aliphatic alcohol or alkoxy alcohol having from 1 to about 18 carbon atoms, or combinations thereof, said copolymer having an average molecular weight of from 1,000 to 8,500, and (B) an acrylic thermoplastic coating resin.
Claim 14
Dependent Claim
154 words
A fluidizable powder coating composition the particles of which are from about 50 to about 200 microns in diameter in the form of a mixture of (A) a melt flow modifying amount of the copolymer of about 40% to 60% by weight of the compound of the formula ##STR10## where R is selected from the group consisting of --CH 2 --, --CH(CH 3 )--, and --C(CH 3 ) 2 --, and M is selected from the group consisting of a hydrogen atom and at least one methyl group, and 40 percent to 60 percent by weight of styrene, vinyl toluene, or at least one ester of acrylic acid or methacrylic acid and an aromatic, monocyclic aliphatic, or open chain aliphatic alcohol or alkoxy alcohol having from 1 to about 18 carbon atoms, or combinations thereof, said copolymer having an average molecular weight of from 1,000 to 8,500, and (B) an acrylic thermoplastic coating resin.
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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) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |