Patent US4387215A successfully refreshed from Google Patents.
US4387215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycyclic ring-opened polymers
Assignee: Individual
•
Filing: 1980-09-15
•
Granted: 1983-06-07
•
Expires: 2000-09-15
Abstract
Abstract This invention relates to the process and the product by process of the polymers formed by the polymerization of polycyclic ring-opening monomers. More particularly, this invention relates to the novel process and product by process of polymers that are produced with near zero shrinkage or expansion during polymerization and are immediately useful for production of strain-free composites, high strength adhesives, precision castings, binders for propellants and as additives to other monomer mixtures to produce a mixture that controls the amount of shrinkage or expansion upon polymerization.
Inventors
- 👤 William J. Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:38
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/664; C08G63/02; C08G63/06; C08G64/00; C08G64/20; C08G64/38
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
73 words
A method of preparing a polymerizate from a monomer which undergoes essentially zero shrinkage or expansion during the formation of said polymerizate which comprises reacting a monomer characterized by two ring nuclei both of which open to form only one new polymer bond, said nuclei being composed solely of carbon and oxygen atoms, in the presence of a polymerization catalyst under polymerization conditions for a period of time sufficient to produce said polymerizate.
Claim 2
Independent Claim
73 words
A method of preparing a polymerizate from a monomer which undergoes essentially zero shrinkage or expansion during the formation of said polymerizate which comprises reacting a monomer characterized by two ring nuclei both of which open to form only one new polymer bond, said nuclei being composed solely of carbon and oxygen atoms, in the presence of a polymerization catalyst under polymerization conditions for a period of time sufficient to produce said polymerizate.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said monomer is a bicyclo spiro ortho ester.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein said monomer is a bicyclo spiro orthocarbonate.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein said monomer is a bicyclic dicyclic ketal lactone.
Claim 6
Dependent Claim
19 words
The method of claim 2 wherein said spiro ortho ester is 1,4,5-trioxaspiro[4,4]nonane and said catalyst is boron trifluoride etherate.
Claim 7
Dependent Claim
18 words
The method of claim 3 wherein said spiro orthocarbonate is bis(1,3-propylene)orthocarbonate and said catalyst is boron trifluoride etherate.
Claim 8
Dependent Claim
26 words
The method of claim 4 wherein said ketal lactone is 8-methyl-2-oxo-hexahydrofuro[2,3b]furan and said catalyst is of the group consisting of sodium metal or boron trifluoride gas.
Claim 9
Dependent Claim
10 words
The polymerizate product resulting from the process of claim 1.
Claim 10
Dependent Claim
10 words
The polymerizate product resulting from the process of claim 2.
Claim 11
Dependent Claim
10 words
The polymerizate product resulting from the process of claim 3.
Claim 12
Dependent Claim
10 words
The polymerizate product resulting from the process of claim 4.
Claim 13
Dependent Claim
10 words
The polymerizate product resulting from the process of claim 5.
Claim 14
Dependent Claim
10 words
The polymerizate product resulting from the process of claim 6.
Claim 15
Dependent Claim
10 words
The polymerizate product resulting from the process of claim 7.
Claim 16
Dependent Claim
115 words
In a process for producing a polymerizate by the condensation polymerization or addition polymerization of monomer or prepolymer reactant in the presence of a polymerization catalyst therefor, said reactant having the characteristic to undergo shrinkage during the formation of said polymerizate, the improvement which comprises admixing a cyclic monomer with said reactant to form a polymerizate containing said reactant and said cyclic monomer as chemically combined constituents thereof, said polymerizate being characterized by a decrease in the amount of shrinkage during its formation, said cyclic monomer possessing two ring nuclei both of which open during the polymerization reaction to form only one new polymer bond, said nuclei being composed solely of carbon and oxygen atoms.
Claim 17
Dependent Claim
115 words
In a process for producing a polymerizate by the condensation polymerization or addition polymerization of monomer or prepolymer reactant in the presence of a polymerization catalyst therefor, said reactant having the characteristic to undergo shrinkage during the formation of said polymerizate, the improvement which comprises admixing a cyclic monomer with said reactant to form a polymerizate containing said reactant and said cyclic monomer as chemically combined constituents thereof, said polymerizate being characterized by a decrease in the amount of shrinkage during its formation, said cyclic monomer possessing two ring nuclei both of which open during the polymerization reaction to form only one new polymer bond, said nuclei being composed solely of carbon and oxygen atoms.
Claim 18
Dependent Claim
31 words
The process of claim 15 wherein the polymerization of the admixture containing said reactant and said cyclic monomer undergoes essentially zero shrinkage or positive expansion during the formation of said polymerizate.
Claim 19
Dependent Claim
28 words
The process of claim 15 or 16 wherein said polycyclic monomer is of the group consisting of bicyclo spiro ortho esters, bicyclo spiro orthocarbonates, and bicyclic ketal lactones.
Claim 20
Dependent Claim
11 words
The process of claim 17 wherein said cyclo monomer is 1,4,5-trioxaspiro[4,4]nonane.
Claim 21
Dependent Claim
11 words
The process of claim 17 wherein said cyclo monomer is bis(1,3-propylene)orthocarbonate.
Claim 22
Dependent Claim
11 words
The process of claim 17 wherein said cyclo monomer is 8-methyl-2-oxo-hexahydrofuro[2,3b]furan.
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) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |