Claims
- 1. A substantially pollution-free method for making thermoformable or vacuum formable biaxially stretchable composites exhibiting a biaxial elongation in excess of 200% without failure said method comprising
- (1) providing as a substrate, a biaxially stretchable thermoplastic sheet exhibiting biaxially elongation in excess of 200%
- (2) coating said biaxially stretchable thermoplastic sheet with a resinous composition to a thickness of up to 5 mils and
- (3) effecting the cure of the resinous composition with a source of UV irradiation having a wave length of between 1849A to 4000A, where the resinous composition is a member selected from the class consisting of a
- (A) solventless polyester resin containing as essential ingredients
- (a) aliphatic unsaturated organic monomer,
- (b) an aliphatically unsaturated polyester soluble in (a), and having a MW of from about 2000 to 10,000 which is the reaction product of a C.sub.(2-20) glycol free of aliphatic unsaturation and an aliphatically unsaturated dicarboxylic acid mixture consisting essentially of
- (i) .alpha.,.beta.-aliphatically unsaturated dicarboxylic acid and an organic dicarboxylic acid selected from the class consisting of
- (ii) organic dicarboxylic acid having C.sub.(5-30) divalent organic radicals between carbonyl radicals selected from aromatic radicals and cyclic radicals free of aromatic saturation,
- (iii) linear saturated aliphatic dicarboxylic acid having 1-3 carbon atoms between carbonyl radicals,
- (iv) linear saturated aliphatic dicarboxylic acid having at least 4 carbon atoms between carbonyl radicals and
- (c) from 0.5% to 5% by weight based on the weight of (a), (b) and (c) of a UV sensitizer,
- where the weight ratio of (a)/(b) has a value of 0.15 to 4 and based on the total moles of (i), (ii), (iii) and (iv) in the aliphatically unsaturated polyester, (i) is present at from 0.01 to 10 mole percent, (ii) is present at from 0 to 99 mole percent, (iii) is present at from 0 to 70 mole percent and (iv) is present at from 0 to 30 mole percent, and
- (B) a curable acrylic resin which contains as essential ingredients
- (d) methylmethacrylate,
- (e) polymethylmethacrylate and
- (f) from 0.05 to 5% by weight of (d), (d) and (f) of a UV sensitizer,
- where (e) has an average MW of from 1000 to 50,000 and the weight ratio of (d)/(e) is from 0.5 to 1.5.
- 2. A method in accordance with claim 1, where the solventless organic resin is a mixture of styrene and an unsaturated polyester.
- 3. A method in accordance with claim 1, where the UV curable resin contains as essential ingredients
- (D) methyl methacrylate,
- (E) polymethylmethacrylate, and
- (F) from 0.05 to 5% by weight of (D), (E) and (F) of a UV sensitizer,
- where (E) is an average M.W. of from 1000 to 50,000 and the weight ratio of D/E is a value of from 0.4 to 1.5.
- 4. A method in accordance with claim 1, where the unsaturated polyester contains chemically combined fumaric acid units and propylene glycol units.
- 5. A method in accordance with claim 1, where the substrate is a high impact modified polystyrene substrate.
- 6. A method in accordance with claim 1, where the substrate is a polycarbonate.
- 7. A method in accordance with claim 1, where the substrate contains a poly(phenyleneoxide) blend.
- 8. A thermoformable or vacuum formable biaxially stretchable composite exhibiting a biaxial elongation in excess of 200% without failure comprising a biaxially stretchable sheet adherently coated with a cured resionous composition, selected from the class consisting of
- (A) a polyester resin resulting from the reaction of
- (a) an aliphatically unsaturated organic monomer and
- (b) an aliphatically unsaturated polyester soluble in said aliphatically unsaturated organic monomer and having a MW of from about 2000 to 10,000 which is the reaction product of a C.sub.(2-20) glycol free of aliphatic unsaturation and an aliphatically unsaturated dicarboxylic acid mixture consisting essentially of
- (i) .alpha.,.beta.-aliphatically unsaturated dicarboxylic acid and an organic dicarboxylic selected from the class consisting of
- (ii) organic dicarboxylic acid having C.sub.(5-30) divalent organic radicals between carbonyl radicals selected from aromatic radicals and cyclic radicals free of aromatic saturation,
- (iii) linear saturated aliphatic dicarboxylic acid having 1-3 carbon atoms between carbonyl radicals,
- (iv) linear saturated aliphatic dicarboxylic acid having at least 4 carbon atoms between carbonyl radicals and
- (c) from 0.5% to 5% by weight based on the weight of (a), (b) and (c) of a UV sensitizer,
- where the weight ratio of (a)/(b) has a value of 0.15 to 4, and based on the total moles of (i), (ii), (iii) and (iv) in the aliphatically unsaturated polyester, (i) is present at from 0.01 to 10 mole percent, (ii) is present at from 0 to 99 mole percent, (iii) is present at from 0 to 70 mole percent and (iv) is present at from 0 to 30 mole percent, and
- (B) curable acrylic resin which contains as essential ingredients
- (d) methylmethacrylate,
- (e) polymethylmethacrylate and
- (f) from .05 to 5% by weight of (d), (e) and (f) of a UV sensitizer,
- where (e) has an average MW of from 1000 to 50,000 and the weight ratio of (d)/(e) is from 0.5 to 1.5.
- 9. A composite in accordance with claim 8, where the substrate consists essentially of a high-impact modified polystyrene and the adherent film is the reaction product of styrene and unsaturated polyester.
- 10. A composite in accordance with claim 8, of a polycarbonate substrate and a cured polymethylmethacrylate film.
- 11. A composite in accordance with claim 8, of a poly)phenyleneoxide) substrate and a cured polymethylmethacrylate film.
- 12. A composite in accordance with claim 8, where the cured film is the reaction product of styrene and unsaturated polyester.
Parent Case Info
This application is a continuation-in-part of our copending application Ser. No. 423,007, filed Dec. 10, 1973, which is a continuation-in-part of application Ser. No. 320,302, filed Jan. 2, 1973, both now abandoned, and assigned to the same assignee as the present invention.
US Referenced Citations (10)
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
423007 |
Dec 1973 |
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Parent |
320302 |
Jan 1973 |
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