Patent US3887669A successfully refreshed from Google Patents.
US3887669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a composite object of acrylic resin and silicone elastomer
Assignee: Rhone Poulenc SA
•
Filing: 1973-03-26
•
Granted: 1975-06-03
•
Expires: 1993-03-26
Abstract
Abstract Composite articles of an acrylic resin adhering to an elastomeric polydiorganosiloxane are obtained by bringing together a curable acrylic composition hot curable in the presence of a peroxide and a curable polydiorganosiloxane hot curable in the presence of a peroxide, and heating the assembly when a strong bond is formed between the two materials. No other adhesive is required. The procedure is especially useful in making dental prostheses.
Inventors
- 👤 Jean Pillet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:10
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14; A; A61; A61C; A61C13/00; C08F; C08F265/00; C08F265/04; C08F265/06; C08F283/00; C08F283/12; C08F283/124; C08K3/00; C08K3/02; C08K3/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
IN A PROCESS OF PRODUCING A SOLID COMPOSITE OBJECT COMPRISING AN ACRYLIC RESIN PORTION ADHERING TO A SILICONE ELASTOMER PORTION, THE IMPROVEMENT COMPRISING BRINGING INTO DIRECT CONTACT WITH ONE ANOTHER AND WITHOUT AN INTERVENING PRIMING LAYER A FIRST MIXTURE COMPRISING A PEROXIDE CATALYST AND A METHYL METHACRYLATE COMPOSITION WHICH CAN BE HOT CURED IN THE PRESENCE OF A PEROXIDE CATALYST AND A SECOND MIXTURE COMPRISING A PEROXIDE CATALYST AND VULCANISABLE POLYDIORGANOSILOXANE RUBBER WITH A CHAIN WHICH CONSISTS OF 85 TO 99.95% OF (CH3)2SIO UNITS, 0 TO 10% OF (C6H5)2SIO UNITS AND 5 TO 0.05% OF CH3(CH2=CH)SIO UNITS AND IS BLOCKED AT EACH END BY A (CH3)3SIO0.5 OR (CH3)2(CH2=CH)SIO0.5 UNIT AND THEN HEATING THE FIRST MIXTURE AND SECOND MIXTURE IN DIRECT CONTACT WITH ONE ANOTHER UNTIL A SOLID OBJECT IS PRODUCED.
Claim 2
Dependent Claim
130 words
IN A PROCESS OF PRODUCING A SOLID COMPOSITE OBJECT COMPRISING AN ACRYLIC RESIN PORTION ADHERING TO A SILICONE ELASTOMER PORTION, THE IMPROVEMENT COMPRISING BRINGING INTO DIRECT CONTACT WITH ONE ANOTHER AND WITHOUT AN INTERVENING PRIMING LAYER A FIRST MIXTURE COMPRISING A PEROXIDE CATALYST AND A METHYL METHACRYLATE COMPOSITION WHICH CAN BE HOT CURED IN THE PRESENCE OF A PEROXIDE CATALYST AND A SECOND MIXTURE COMPRISING A PEROXIDE CATALYST AND VULCANISABLE POLYDIORGANOSILOXANE RUBBER WITH A CHAIN WHICH CONSISTS OF 85 TO 99.95% OF (CH3)2SIO UNITS, 0 TO 10% OF (C6H5)2SIO UNITS AND 5 TO 0.05% OF CH3(CH2=CH)SIO UNITS AND IS BLOCKED AT EACH END BY A (CH3)3SIO0.5 OR (CH3)2(CH2=CH)SIO0.5 UNIT AND THEN HEATING THE FIRST MIXTURE AND SECOND MIXTURE IN DIRECT CONTACT WITH ONE ANOTHER UNTIL A SOLID OBJECT IS PRODUCED.
Claim 3
Dependent Claim
132 words
In a process of producing a solid composite object comprising an acrylic resin portion adhering to a silicone elastomer portion, the improvement comprising bringing into direct contact with one another and without an intervening priming layer a first mixture comprising a peroxide catalyst and a methyl methacrylate composition which can be hot cured in the presence of a peroxide catalyst and a second mixture comprising a peroxide catalyst and vulcanisable polydiorganosiloxane rubber with a chain which consists of 85 to 99.95% of (CH3)2SiO units, 0 to 10% of (C6H5)2SiO units and 5 to 0.05% of CH3(CH2 CH)SiO units and is blocked at each end by a (CH3)3SiO0.5 or (CH3)2(CH2 CH)SiO0.5 unit and then heating the first mixture and second mixture in direct contact with one another until a solid object is produced.
Claim 4
Dependent Claim
132 words
In a process of producing a solid composite object comprising an acrylic resin portion adhering to a silicone elastomer portion, the improvement comprising bringing into direct contact with one another and without an intervening priming layer a first mixture comprising a peroxide catalyst and a methyl methacrylate composition which can be hot cured in the presence of a peroxide catalyst and a second mixture comprising a peroxide catalyst and vulcanisable polydiorganosiloxane rubber with a chain which consists of 85 to 99.95% of (CH3)2SiO units, 0 to 10% of (C6H5)2SiO units and 5 to 0.05% of CH3(CH2 CH)SiO units and is blocked at each end by a (CH3)3SiO0.5 or (CH3)2(CH2 CH)SiO0.5 unit and then heating the first mixture and second mixture in direct contact with one another until a solid object is produced.
Claim 5
Dependent Claim
32 words
A process according to claim 1 wherein at least one of the first mixture and second mixture is directly supported on a component comprising cured first mixture or cured second mixture respectively.
Claim 6
Dependent Claim
41 words
A process according to claim 2 wherein the first mixture is directly supported on the bonding surface of a cured methyl methacrylate resin article, the second mixture is then brought into contact with the first mixture and the whole assembly heated.
Claim 7
Dependent Claim
86 words
A method according to claim 3 wherein a layer is removed from that part of a methyl methacrylate resin denture plate designed to contact the roof of the mouth in an amount corresponding substantially to the amount of elastomeric material to be bonded to the plate to reveal a bonding surface, a layer of the first mixture is applied to the bonding surface, a layer of the second mixture is applied in direct contact with the layer of first mixture and the assembly is then heated.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |