US4291098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organoalkoxysilane coating compositions for plastic articles
Assignee: Nippon Aspherical Lens Co Ltd
•
Filing: 1980-01-09
•
Granted: 1981-09-22
•
Expires: 2000-01-09
Abstract
Abstract This invention provides a composition for coating plastics articles comprising (A) a hydrolyzed product of an organoalkoxysilane represented by the formula R1nSi(OR2)4-n (I) wherein R1 is a saturated or unsaturated hydrocarbon residue having 1 to 4 carbon atoms, R2 is a saturated hydrocarbon residue having 1 to 4 carbon atoms, and n is 0, 1 or 2, (B) an epoxy resin having an epoxy equivalent of about 120 to about 700, and (C) a bicyclic amidine represented by the formula <IMAGE> (II) wherein m is 3 or 5, or a salt thereof; a method of coating plastics articles with use of the composition; and plastics articles having a cured coating of the composition.
Inventors
- 👤 Mitsuaki Tanaka
- 👤 Masaharu Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:35
CPC Classifications
C; C09; C09D; C09D4/00; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C09D183/00; C09D183/04; C08J2483/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31511; Y10T428/31525; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
113 words
A composition for coating plastics articles comprising (A) 100 parts by weight of hydrolyzed product of an organoalkoxysilane represented by the formula R.sup.1.sub.n Si(OR.sup.2).sub.4-n (I) wherein R 1 is a saturated or unsaturated hydrocarbon residue having 1 to 4 carbon atoms, R 2 is a saturated hydrocarbon residue having 1 to 4 carbon atoms, and n is 0, 1 or 2, (B) about 1 to about 10 parts by weight of an epoxy resin having an epoxy equivalent of about 120 to about 700, and (C) about 0.05 to about 5 parts by weight of a bicyclic amidine represented by the formula ##STR3## wherein m is 3 or 5, or a salt thereof.
Claim 2
Dependent Claim
113 words
A composition for coating plastics articles comprising (A) 100 parts by weight of hydrolyzed product of an organoalkoxysilane represented by the formula R.sup.1.sub.n Si(OR.sup.2).sub.4-n (I) wherein R 1 is a saturated or unsaturated hydrocarbon residue having 1 to 4 carbon atoms, R 2 is a saturated hydrocarbon residue having 1 to 4 carbon atoms, and n is 0, 1 or 2, (B) about 1 to about 10 parts by weight of an epoxy resin having an epoxy equivalent of about 120 to about 700, and (C) about 0.05 to about 5 parts by weight of a bicyclic amidine represented by the formula ##STR3## wherein m is 3 or 5, or a salt thereof.
Claim 3
Dependent Claim
50 words
A composition as defined in claim 1 wherein the organoalkoxysilane is represented by the formula (I) in which R 1 is alkyl having 1 to 4 carbon atoms or alkenyl having 1 to 4 carbon atoms, R 2 is alkyl having 1 to 4 carbon atoms and n is 1.
Claim 4
Dependent Claim
35 words
A composition as defined in claim 2 wherein the organoalkoxysilane is represented by the formula (I) in which R 1 is methyl, ethyl or vinyl, R 2 is methyl or ethyl and n is 1.
Claim 5
Dependent Claim
12 words
A composition as defined in claim 3 wherein the organoalkoxysilane is methyltrimethoxysilane.
Claim 6
Dependent Claim
21 words
A composition as defined in claim 1 wherein the epoxy resin has an epoxy equivalent of about 150 to about 500.
Claim 7
Dependent Claim
21 words
A composition as defined in claim 5 wherein the epoxy resin has an epoxy equivalent of about 170 to about 300.
Claim 8
Dependent Claim
16 words
A composition as defined in claim 1 wherein the epoxy resin is of the bisphenol type.
Claim 9
Dependent Claim
34 words
A composition as defined in claim 1 wherein the epoxy resin is used in an amount of about 1.5 to about 8 parts by weight per 100 parts by weight of the hydrolyzed product.
Claim 10
Dependent Claim
37 words
A composition as defined in claim 1 wherein the bicyclic amidine or a salt thereof is used in an amount of about 0.1 to about 4 parts by weight per 100 parts by weight of hydrolyzed product.
Claim 11
Dependent Claim
17 words
A composition as defined in claim 1 which is in the form of an organic solvent solution.
Claim 12
Independent Claim
136 words
A method of coating a plastics article comprising applying a composition to the surface of the plastics article and forming a cured coating of the composition thereon, the composition comprising (A) 100 parts by weight of hydrolyzed product of an organoalkoxysilane represented by the formula R.sup.1.sub.n Si(OR.sup.2).sub.4-n (I) wherein R 1 is a saturated or unsaturated hydrocarbon residue having 1 to 4 carbon atoms, R 2 is a saturated hydrocarbon residue having 1 to 4 carbon atoms, and n is 0, 1 or 2, (B) about 1 to about 10 parts by weight of an epoxy resin having an epoxy equivalent of about 120 to about 700, and (C) about 0.05 to about 5 parts by weight of a bicyclic amidine represented by the formula ##STR4## wherein m is 3 or 5, or a salt thereof.
Claim 13
Independent Claim
136 words
A method of coating a plastics article comprising applying a composition to the surface of the plastics article and forming a cured coating of the composition thereon, the composition comprising (A) 100 parts by weight of hydrolyzed product of an organoalkoxysilane represented by the formula R.sup.1.sub.n Si(OR.sup.2).sub.4-n (I) wherein R 1 is a saturated or unsaturated hydrocarbon residue having 1 to 4 carbon atoms, R 2 is a saturated hydrocarbon residue having 1 to 4 carbon atoms, and n is 0, 1 or 2, (B) about 1 to about 10 parts by weight of an epoxy resin having an epoxy equivalent of about 120 to about 700, and (C) about 0.05 to about 5 parts by weight of a bicyclic amidine represented by the formula ##STR4## wherein m is 3 or 5, or a salt thereof.
Claim 14
Dependent Claim
17 words
A method as defined in claim 11 wherein the plastics article is made of a polycarbonate resin.
Claim 15
Dependent Claim
37 words
A method as defined in claim 11 wherein the composition is applied in the form of an organic solvent solution to the plastics article and then heated at a temperature of about 70° to about 150° C.
Claim 16
Dependent Claim
117 words
A plastics article having a cured coating of a composition comprising (A) 100 parts by weight of hydrolyzed product of an organoalkoxysilane represented by the formula R.sup.1.sub.n Si(OR.sup.2).sub.4-n (I) wherein R 1 is a saturated or unsaturated hydrocarbon residue having 1 to 4 carbon atoms, R 2 is a saturated hydrocarbon residue having 1 to 4 carbon atoms, and n is 0, 1 or 2, (B) about 1 to about 10 parts by weight of an epoxy resin having an epoxy equivalent of about 120 to about 700, and (C) about 0.05 to about 5 parts by weight of a bicyclic amidine represented by the formula ##STR5## wherein m is 3 or 5, or a salt thereof.
Claim 17
Dependent Claim
117 words
A plastics article having a cured coating of a composition comprising (A) 100 parts by weight of hydrolyzed product of an organoalkoxysilane represented by the formula R.sup.1.sub.n Si(OR.sup.2).sub.4-n (I) wherein R 1 is a saturated or unsaturated hydrocarbon residue having 1 to 4 carbon atoms, R 2 is a saturated hydrocarbon residue having 1 to 4 carbon atoms, and n is 0, 1 or 2, (B) about 1 to about 10 parts by weight of an epoxy resin having an epoxy equivalent of about 120 to about 700, and (C) about 0.05 to about 5 parts by weight of a bicyclic amidine represented by the formula ##STR5## wherein m is 3 or 5, or a salt thereof.
References Cited (Backward Citations)
US3170890A
Cited
US3682687A
Cited
US3894881A
Cited
JPS4817880B1
Cited
JPS5117299A
Cited
US4056208A
Cited
US4188415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |