EP0443270A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Blended polycaprolactone thermoplastic molding composition
Assignee: 3M Co
•
Filing: 1990-12-24
•
Granted: —
•
Expires: 2010-12-24
Abstract
Abstract Thermoplastic molding compositions are made from a blend of high molecular weight and low molecular weight polycaprolactones. The blends have lower viscosity, and can have higher modulus, than a composition containing only high molecular weight polycaprolactone. The blends are especially useful for dental impressioning.
Inventors
- 👤 Joel D. C/O Minnesota Mining And Oxman
- 👤 Andrew F. C/O Minnesota Mining And Ubel Iii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 15:33
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/04; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61K6/891; A61K6/90; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
42 words
A polycaprolactone molding composition, the composition being solid at 38°C, and having a melting or softening temperature that comfortably can be withstood by oral tissues characterized in that the composition contains a blend of high molecular weight and low molecular weight polycaprolactones.
Claim 2
Dependent Claim
32 words
A composition according to claim 1, wherein the high molecular weight polycaprolactone has a molecular weight greater than 30,000, and the low molecular weight polycaprolactone has a molecular weight less than 10,000.
Claim 3
Dependent Claim
26 words
A composition according to any preceding claim, characterized in that at least one of the high molecular weight and low molecular weight polycaprolactones comprises epsilon-caprolactone homopolymer.
Claim 4
Dependent Claim
143 words
A composition according to any preceding claim, characterized in that the high molecular weight polycaprolactone has the formula: where R¹ is an aromatic or a straight chain or branched aliphatic backbone, w is 1 if R¹ is hydrogen, and w otherwise has an average value from 1 to 4, M¹ is oxygen or -NR²- where R² is hydrogen or a non-interfering aromatic or aliphatic group, and the product of w times x is greater than 175, and the low molecular weight polycaprolactone has the formula: where R³ is an aromatic or a straight chain or branched aliphatic backbone, y is 1 if R³ is hydrogen and y otherwise has an average value from 1 to 4, M² is oxygen or -NR⁴- where R⁴ is hydrogen or a non-interfering aromatic or aliphatic group, and the product of y times z is less than 175.
Claim 5
Dependent Claim
33 words
A composition according to any preceding claim, further characterized in that the composition contains at least one ethylenically unsaturated monomer, oligomer or polymer capable of undergoing free-radical polymerization, together with a suitable photoinitiator.
Claim 6
Dependent Claim
34 words
A composition according to any preceding claim, characterized in that the amount of low molecular weight polycaprolactone is sufficient to increase the composition's cool state storage modulus and lower the composition's warm state viscosity.
Claim 7
Dependent Claim
50 words
A composition according to any preceding claim, further characterized by containing 10 to 90 weight percent high molecular weight polycaprolactone, 10 to 90 weight percent low molecular weight polycaprolactone, 0 to 70 weight percent filler, 0 to 50 weight percent free-radically polyerizable resin, and 0 to 10 weight percent photoinitiator.
Claim 8
Dependent Claim
20 words
A composition according to any preceding claim, further characterized by being in the form of a dental crown or bridge.
Claim 9
Dependent Claim
25 words
A composition according to any preceding claim, further characterized by being in the form of a male or female mold of a tooth or teeth.
Claim 10
Dependent Claim
24 words
A composition according to any preceding claim, further characterized in that the composition comprises at least one layer of a multi-layer thermoplastic molding composition.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.