US4615947A
Expired / Lapsed
US
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Acrylic primer for adhering an organopolysiloxane
Assignee: General Electric Co
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Filing: 1985-04-29
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Granted: 1986-10-07
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Expires: 2005-04-29
Abstract
Abstract A primer layer containing a thermoplastic or thermoset acrylic homogeneously admixed with an organopolysiloxane constituent increases the adhesion of abrasion and solvent resistant organopolysiloxane hardcoats to thermoplastic substrates.
Inventors
- 👤 John C. Goossens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:51
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C08J7/043; C08J7/046; C08J2369/00; C08J2483/00; C08J2483/04; C08L; C08L83/00; C08L83/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
108 words
An article comprising a thermoplastic substrate, having adhered on at least one surface a primer layer, said primer layer comprising in admixture: (i) a thermoplastic acrylic polymer or the solid reaction products of a thermosettable acrylic polymer, and (ii) solid condensation products of partial condensates of silanols derived from compounds having the general formula: R.sup.3.sub.a SiZ.sub.( 4-a) wherein R 3 is selected from a monovalent hydrocarbon radical or halogenated monovalent hydrocarbon radical, a is 0, 1, or 2, and Z is independently a member of one or more hydrolyzable groups, said condensation products being in weight ratio to the acrylic of from about 1/14 up to about 9/6.
Claim 2
Dependent Claim
108 words
An article comprising a thermoplastic substrate, having adhered on at least one surface a primer layer, said primer layer comprising in admixture: (i) a thermoplastic acrylic polymer or the solid reaction products of a thermosettable acrylic polymer, and (ii) solid condensation products of partial condensates of silanols derived from compounds having the general formula: R.sup.3.sub.a SiZ.sub.( 4-a) wherein R 3 is selected from a monovalent hydrocarbon radical or halogenated monovalent hydrocarbon radical, a is 0, 1, or 2, and Z is independently a member of one or more hydrolyzable groups, said condensation products being in weight ratio to the acrylic of from about 1/14 up to about 9/6.
Claim 3
Dependent Claim
26 words
The article of claim 1 wherein said primer layer additionally contains colloidal silica chemically bonded to said solid condensation products of said partial condensates of silanols.
Claim 4
Dependent Claim
18 words
The article of claim 1 wherein said primer layer additionally contains a UV light absorbing or stabilizing compound.
Claim 5
Dependent Claim
20 words
The article of claim 1 wherein said primer layer has a thickness of from about 0.005 to about 0.15 mil.
Claim 6
Dependent Claim
16 words
The article of claim 1 wherein said primer layer is adhered to a polycarbonate thermoplastic substrate.
Claim 7
Dependent Claim
16 words
The article of claim 1 wherein said primer layer is adhered to a copolyester-carbonate thermoplastic substrate.
Claim 8
Dependent Claim
91 words
The article of claim 1 wherein said a is 1 and said R 3 is at least 70% by number methyl with the balance selected from the group consisting of an alkyl radical containing from 1 to about 6 carbon atoms, an alkenyl radical containing from 2 to 6 carbon atoms, a phenyl radical, a halogenated alkyl radical containing from 1 to about 6 carbon atoms, a glycidoxy alkylene radical containing from 2 to about 6 carbon atoms, and an acrylic ester radical containing from 4 to about 6 carbon atoms.
Claim 9
Dependent Claim
72 words
The article of claim 1 wherein said primer layer is adhered on one surface to a hardcoat layer comprising solid condensation products of partial condensates of silanols derived from compounds of the general formula: R.sup.3.sub.a SiZ.sub.( 4- a) wherein R 3 is selected from a monovalent hydrocarbon radical and halogenated monovalent hydrocarbon radical, a may be 0, 1, or 2, and Z is independently a member of one or more hydrolyzable groups.
Claim 10
Dependent Claim
89 words
The article of claim 8 wherein a is 1 and R 3 is at least 70% by number methyl with the balance selected from the group consisting of an alkyl radical containing from 1 to about 6 carbon atoms, an alkenyl radical containing from 2 to 6 carbon atoms, a phenyl radical, a halogenated alkyl radical containing from 1 to about 6 carbon atoms, a glycidoxy alkylene radical containing from 2 to about 6 carbon atoms, and an acrylic ester radical containing from 4 to about 6 carbon atoms.
Claim 11
Dependent Claim
25 words
The article of claim 8 wherein said hardcoat layer additionally comprises colloidal silica chemically bonded to said solid condensation products of partial condensates of silanols.
Claim 12
Dependent Claim
21 words
The article of claim 8 wherein said hardcoat layer has a thickness of from about 0.05 mil to about 0.5 mil.
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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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |