Dual shell dental appliance and material constructions
AssigneeBay Materials, LLC
InventorsRay F. Stewart, John Lahlouh
Life of this patent
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Abstract
Improved dental appliances and polymeric sheet compositions are disclosed. The polymeric sheet compositions are useful for making dental appliances having outer layers comprised of a material having a modulus of from about 1,000 MPA to 2,500 MPA (“hard”) and an inner core comprised of elastomeric material or materials having a modulus of from about 50 MPa to 500 MPa (“soft”), which exhibit improved flexibility and strength, and better stain and tear resistance than currently available materials and dental appliances.
Claims34
A polymeric sheet composition, comprising:
- at least two outer layers A and C and an elastomeric inner layer B, wherein one or both of the outer layers A and C individually comprise a thermoplastic polymer having a flexural modulus of from about 1,000 MPa to 2,500 Mpa, and the inner layer B is comprised of an elastomeric material having a hardness from about A 60 to D 85.
A polymeric sheet composition comprised of at least two rigid or hard outer layers A and C, at least two soft inner layers B and B′, and at least a rigid or hard inner layer, D, wherein the rigid or hard layers, A, C and D, individually comprise a thermoplastic polymer having a modulus of from about 1,000 MPa to 2,500 MPa and the soft inner layers B and B′ individually comprise an elastomeric material having a hardness from about A 60 to D 85.
A polymeric sheet composition, comprising:
- three or more layers, A, A1, and B, wherein the outermost layers, A and A1 have different thicknesses from one another and individually comprise a thermoplastic polymer having a flexural modulus of from about 1,000 MPa to 2,500 MPa, and wherein the inner layer B is comprised of an elastomeric material having a hardness from about A 60 to D 85.
A polymeric sheet composition, comprising:
- at least two outer layers A and C and an elastomeric inner layer B, wherein (i) one or both of the outer layers A and C individually comprise a thermoplastic polymer having a flexural modulus of from about 1,000 MPa to 2,500 Mpa, (ii) the inner layer B is comprised of an elastomeric material having a hardness from about A 60 to D 85, (iii) the A, B and C layers of the polymeric sheet composition have a combined thickness of from 250 microns to 2,000 microns and a flexural modulus of from 500 MPa to 1,500 Mpa, and (iv) the inner layer B comprises an anhydride functionalized styrenic elastomer having a hardness of from about A60 to D50.
A polymeric sheet composition, comprising:
- at least two outer layers A and C and an elastomeric inner layer B, wherein (i) one or both of the outer layers A and C individually comprise a thermoplastic polymer having a flexural modulus of from about 1,000 MPa to 2,500 Mpa, (ii) the inner layer B is comprised of an elastomeric material having a hardness from about A 60 to D 85, (iii) the A, B and C layers of the polymeric sheet composition have a combined thickness of from 250 microns to 2,000 microns and a flexural modulus of from 500 MPa to 1,500 Mpa, and (iv) one or more of the A and C layers comprises a co-polyester having a:
- (c) a dicarboxylic acid component and
- (d) a diol component, wherein the-copolyester exhibits a glass transition temperature (Tg) from 80° C. to 150° C.
A polymeric sheet composition, comprising:
- at least two outer layers A and C and an elastomeric inner layer B, wherein (i) one or both of the outer layers A and C individually comprise a thermoplastic polymer having a flexural modulus of from about 1,000 MPa to 2,500 Mpa, (ii) the inner layer B is comprised of an elastomeric material having a hardness from about A 60 to D 85, (iii) the A, B and C layers of the polymeric sheet composition have a combined thickness of from 250 microns to 2,000 microns and a flexural modulus of from 500 MPa to 1,500 Mpa, and (iv) one or more of the A and C layers comprises a polyurethane comprised of:
- (c) a di-isocyanate, and
- (d) a diol component comprising one or more of hexane diol and cyclohexane dimethanol wherein the polyurethane has a glass transition temperature Tg from about 85° C. to about 150° C.
A polymeric sheet composition, comprising:
- at least two outer layers A and C and an elastomeric inner layer B, wherein (i) one or both of the outer layers A and C individually comprise a thermoplastic polymer having a flexural modulus of from about 1,000 MPa to 2,500 Mpa, (ii) the inner layer B is comprised of an elastomeric material having a hardness from about A 60 to D 85, (iii) the A, B and C layers of the polymeric sheet composition have a combined thickness of from 250 microns to 2,000 microns and a flexural modulus of from 500 MPa to 1,500 Mpa, and (iv) the inner layer B comprises an aromatic polyether polyurethane having a compression set of less than 35%.
A polymeric sheet composition, comprising:
- at least two outer layers A and C and an elastomeric inner layer B, wherein (i) one or both of the outer layers A and C individually comprise a thermoplastic polymer having a flexural modulus of from about 1,000 MPa to 2,500 Mpa, (ii) the inner layer B is comprised of an elastomeric material having a hardness from about A 60 to D 85, (iii) the A, B and C layers of the polymeric sheet composition have a combined thickness of from 250 microns to 2,000 microns and a flexural modulus of from 500 MPa to 1,500 Mpa, and (iv) the inner layer B comprises an aromatic polyether polyurethane having an interlayer peel strength between the A and C layers and the B layer of greater than 50 N per 2.5 cm.
Dependencies are inferred from the claim text.