US4049867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting resin composition comprising an [(2,3-epoxypropoxy)alkyl]trialkyloxysilane
Assignee: Topcon Corp
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Filing: 1975-12-23
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Granted: 1977-09-20
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Expires: 1995-12-23
Abstract
Abstract A novel thermosetting resin composition comprising at least one [(2,3-epoxypropoxy)alkyl]trialkoxysilane and at least one selected from polymers, prepolymers, copolymers and coprepolymers of epoxy-group-containing vinyl monomers, which may further contain at least one selected from polymers, prepolymers, copolymers and coprepolymers of vinyl monomers containing no epoxy group, is disclosed. This composition is cured by heating with addition of a ring-opening polymerization catalyst and remarkably improves surface hardness, abrasion resistance, weathering resistance, chemical resistances, heat resistances, etc. of acrylic resins and many other plastic materials without imparing the inherent transparency and other optical properties of these materials when it is applied on the surface of them and cured.
Inventors
- 👤 Akihiko Ito
- 👤 Isao Kaetsu
- 👤 Hiroshi Okubo
- 👤 Masamichi Kato
- 👤 Koichiro Hayashi
- 👤 Yuji Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:03
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/36; C08G77/48; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31511; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A resin composite comprising a plastic substrate and a cured, abrasion resistant, transparent coating formed from a thermosetting resin composition comprising: a. at least one [(2,3-epoxypropoxy)alkyl] trialkoxysilane represented by a general formula: ##STR3## whereby R is an alkylene group containing up to 4 carbon atoms and R' is an alkyl group containing up to 4 carbon atoms, and b. at least one selected from the group consisting of polymers and copolymers of epoxy-group containing vinyl monomers selected from the group consisting of glycidyl acrylate, 3,4-epoxybutyl methacrylate, 3,4-epoxybutyl acrylate, 4,5-epoxypentyl methacrylate and 4,5-epoxypentyl acrylate, which coating is cured by heating with addition of a ring-opening polymerization catalyst and wherein (b) amounts to 2 to 50% by weight of the total of components (a) and (b).
Claim 2
Dependent Claim
124 words
A resin composite comprising a plastic substrate and a cured, abrasion resistant, transparent coating formed from a thermosetting resin composition comprising: a. at least one [(2,3-epoxypropoxy)alkyl] trialkoxysilane represented by a general formula: ##STR3## whereby R is an alkylene group containing up to 4 carbon atoms and R' is an alkyl group containing up to 4 carbon atoms, and b. at least one selected from the group consisting of polymers and copolymers of epoxy-group containing vinyl monomers selected from the group consisting of glycidyl acrylate, 3,4-epoxybutyl methacrylate, 3,4-epoxybutyl acrylate, 4,5-epoxypentyl methacrylate and 4,5-epoxypentyl acrylate, which coating is cured by heating with addition of a ring-opening polymerization catalyst and wherein (b) amounts to 2 to 50% by weight of the total of components (a) and (b).
Claim 3
Dependent Claim
138 words
A resin composite as set forth in claim 1, which comprises a substrate of a plastic resin selected from the groups consisting of polymers and copolymers of methacrylic acid esters and acrylic acid esters, poly(vinyl chloride), polymers of diethyleneglycol bis(allyl carbonate), polycarbonates, polymers and copolymers of styrene and acrylonitrile, polyesters, cellulose nitrate, cellulose acetate and poly(vinyl alcohol); and said coating formed from said thermosetting resin composition wherein the R of the general formula is selected from the group consisting of methylene, ethylene and trimethylene, and R' is selected from the group consisting of methyl, ethyl, n-propyl and n-butyl, and wherein the composition further contains a catalytic amount of a catalyst selected from the group consisting of a Lewis acid, complex of a Lewis acid and an oxygen-containing organic compound, and a protonic acid as the ring-opening polymerization catalyst.
Claim 4
Dependent Claim
64 words
A resin composite as set forth in claim 1, which comprises a plastic resin substrate and a coating formed from said thermosetting resin composition which further contains (c) a vinyl monomer selected from the group consisting of lower alkyl methacrylates, lower alkyl acrylates, styrene and vinyl acetate, in an amount of up to 10% by weight of the total components (a), (b) and (c).
Claim 5
Dependent Claim
103 words
A resin composite as set forth in claim 2, wherein said catalyst is selected from the group consisting of BF 3 , SnCl 4 , SbCl 5 SbCl 3 , ZnCl 2 , a complex of one of these compounds and ethyl ether, HCl, HBr, HI, H 2 SO 4 , a carboxylic acid, sulfonic acid and HC10 4 , and wherein said composition further contains (c) a vinyl monomer selected from the group consisting of lower alkyl methacrylates, lower alkyl acrylates, styrene and vinyl acetate, in an amount of up to 10% by weight of the total components (a), (b) and (c).
Claim 6
Dependent Claim
119 words
A resin composite as set forth in claim 1, which comprises a substrate of a plastic resin selected from the group consisting of polymers and copolymers of methacrylic acid esters and acrylic acid esters, diethyleneglycol bis(allyl carbonate), polymers and copolymers of styrene and acrylonitrile; and said coating formed from said thermosetting resin composition which contains: (a) a [(2,3-epoxypropoxy)propyl]trialkoxy-silane, (b) one of said polymers and copolymers of glycidyl acrylate, (d) a catalytic amount of a ring-opening catalyst selected from the group consisting of HClO 4 and BF 3 , and (e) a solvent consisting of a mixture of chloroform and acetone and wherein component ( b) amounts to 5 - 20% by weight of the total components (a) and (b).
Claim 7
Dependent Claim
50 words
A resin composite as set forth in claim 5, wherein said composition further contains (c) a vinyl monomer selected from the group consisting of methyl methacrylate, styrene and vinyl acetate, and wherein component (c) amounts to 0.1 - 2% by weight of the total of components (a), (b) and (c).
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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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |