US5219900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coatings
Assignee: PPG Industries Ohio Inc
•
Filing: 1991-10-02
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Granted: 1993-06-15
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Expires: 2011-10-02
Abstract
Abstract The invention provides a base coat composition comprising a dispersion in an aqueous carrier for the composition of polymer microparticles, the polymer microparticles being a mixture of: (a) 5 to 95% by weight of addition polymer micro-particles having a crosslinked core and a stabilising mantle containing salt forming groups and (b) 95 to 5% by weight of addition polymer micro-particles having polyoxyalkylene stabiliser units derived from C1-4 alkoxypolyoxyalkylene containing monomers.
Inventors
- 👤 Stephen P. Davies
- 👤 Graham S. Kay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:40
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/02; C08; C08F; C08F265/00; C08F265/04; C08F265/06; C08F285/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
94 words
A base coat composition comprising a dispersion in an aqueous carrier for the composition of polymer microparticles, the polymer microparticles being a mixture of two different types of polymer microparticles: (a) 5 to 95% by weight of addition polymer microparticles having a crosslinked core and a stabilizing mantle containing salt forming groups, and (b) 95 to 5% by weight addition polymer microparticles having polyoxyalkylene stabilizer units derived from C 1-4 alkoxypolyoxyalkylene containing monomers, said composition being characterized by its ability to dry at a temperature in the range of ambient temperature to 80° C.
Claim 2
Dependent Claim
94 words
A base coat composition comprising a dispersion in an aqueous carrier for the composition of polymer microparticles, the polymer microparticles being a mixture of two different types of polymer microparticles: (a) 5 to 95% by weight of addition polymer microparticles having a crosslinked core and a stabilizing mantle containing salt forming groups, and (b) 95 to 5% by weight addition polymer microparticles having polyoxyalkylene stabilizer units derived from C 1-4 alkoxypolyoxyalkylene containing monomers, said composition being characterized by its ability to dry at a temperature in the range of ambient temperature to 80° C.
Claim 3
Dependent Claim
48 words
A composition according to claim 1 where the mixture comprises (a) 15 to 85% by weight of addition polymer microparticles having a crosslinked core and stabilizing mantle containing salt forming groups, and (b) 85 to 15% by weight of addition polymer microparticles having C 1-4 alkoxypolyoxyalkylene stabilizer units.
Claim 4
Dependent Claim
48 words
A composition according to claim 2 where the mixture comprises (a) 40 to 80% by weight of addition polymer microparticles having a crosslinked core and stabilizing mantle containing salt forming groups, and (b) 60 to 20% by weight of addition polymer microparticles having C 1-4 alkoxypolyoxyalkylene stabilizer units.
Claim 5
Dependent Claim
21 words
A composition according to claim 1 where the crosslinked core consists of a non-crosslinked seed portion surrounded by a crosslinked shell.
Claim 6
Dependent Claim
14 words
A composition according to claim 4 where the seed portion consists of polymethyl methacrylate.
Claim 7
Dependent Claim
15 words
A composition according to claim 4 where the seed portion consists of methyl methacrylate-butylacrylate co-polymer.
Claim 8
Dependent Claim
25 words
A composition according to claim 4 where the shell portion consists of units derived from the following monomers methyl methacrylate, butyl acrylate and allyl methacrylate.
Claim 9
Dependent Claim
16 words
A composition according to claim 1 where the salt-forming groups in the mantle are carboxyl groups.
Claim 10
Dependent Claim
28 words
A composition according to claim 1 where the mantle consists of units derived from the following monomers methacrylic acid hydroxyethyl acrylate and butyl acrylate and optionally butyl methacrylate.
Claim 11
Dependent Claim
25 words
A composition according to claim 1 where the mantle consists of units derived from the following monomers methacrylic acid butyl acrylate and optionally butyl methacrylate.
Claim 12
Dependent Claim
16 words
A composition according to claim 1 where the polymer microparticles (a) have additional polyoxyalkylene stabilizer units.
Claim 13
Dependent Claim
53 words
A composition according to claim 1 where the addition polymer microparticles (b) having polyoxyalkylene stabilizer units are derived from the following monomers butyl acrylate and styrene, or butyl acrylate and methyl methacrylate, or either of these optionally together with glycidyl methacrylate and the stabilizer units are derived from methoxypolyoxyethylene methacrylate or methoxypolyoxyethylene acrylate.
Claim 14
Dependent Claim
11 words
A composition according to claim 1 also containing a metallic pigment.
Claim 15
Dependent Claim
14 words
A composition according to claim 1 also containing a non-metallic inorganic or organic pigment.
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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) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |