Claims
- 1. A pressure sensitive adhesive comprising a crosslinked poly(.beta.-hydroxyorganoate) and a tackifier; wherein the pressure sensitive adhesive has a Tg of less than about 20.degree. C. and the poly(.beta.-hydroxyorganoate) comprises monomeric units of the general formula: ##STR4## wherein: (i) a minor amount of the monomeric units have an R group containing 1-3 carbon atoms; and
- (ii) a major amount of the monomeric units have an R group containing 4-30 carbon atoms.
- 2. The pressure sensitive adhesive of claim 1 wherein the poly(.beta.-hydroxyorganoate) comprises no greater than about 20 mole percent of the monomeric units having an R group containing 1-3 carbon atoms, and at least about 80 mole percent of the monomeric units having an R group containing 4-30 carbon atoms.
- 3. The pressure sensitive adhesive of claim 1 comprising a mixture of different poly(.beta.-hydroxyorganoate)s.
- 4. The pressure sensitive adhesive of claim 1 wherein the poly(.beta.-hydroxyorganoate) comprises a major amount of at least two different monomeric units having R groups containing 4-30 carbon atoms.
- 5. The pressure sensitive adhesive composition of claim 1 wherein the poly(.beta.-hydroxyorganoate) has unsaturated R groups.
- 6. The pressure sensitive adhesive composition of claim 1 wherein the poly(.beta.-hydroxyorganoate) comprises a major amount of 3-hydroxyoctanoate and 3-hydroxynonanoate monomeric units.
- 7. The pressure sensitive adhesive composition of claim 1 wherein the poly(.beta.-hydroxyorganoate) comprises a major amount of 3-hydroxyoctanoate and 3-hydroxy-10-undecenoate monomeric units.
- 8. A nonplasticized pressure sensitive adhesive comprising a crosslinked poly(.beta.-hydroxyorganoate) and a tackifier; wherein the pressure sensitive adhesive has a Tg of less than about 20.degree. C. and the poly(.beta.-hydroxyorganoate) comprises nonomeric units of the general formula: ##STR5## wherein: (i) a minor amount of the monomeric units have an R group containing 1-3 carbon atoms; and
- (ii) a major amount of the monomeric units have an R group containing 4-30 carbon atoms.
- 9. The pressure sensitive adhesive of claim 8 wherein the poly(.beta.-hydroxyorganoate) comprises no greater than about 20 mole percent of the monomeric units having an R group containing 1-3 carbon atoms, and at least about 80 mole percent of the monomeric units having an R group containing 4-30 carbon atoms.
- 10. The pressure sensitive adhesive of claim 8 comprising a mixture of different poly(.beta.-hydroxyorganoate)s.
- 11. The pressure sensitive adhesive of claim 8 wherein the poly(.beta.-hydroxyorganoate) comprises a major amount of at least two different monomeric units having R groups containing 4-30 carbon atoms.
- 12. The pressure sensitive adhesive composition of claim 8 wherein the poly(.beta.-hydroxyorganoate) has unsaturated R groups.
- 13. The pressure sensitive adhesive composition of claim 8 wherein the poly(.beta.-hydroxyorganoate) comprises a major amount of 3-hydroxyoctanoate and 3-hydroxynonanoate monomeric units.
- 14. The pressure sensitive adhesive composition of claim 8 wherein the poly(.beta.-hydroxyorganoate) comprises a major amount of 3-hydroxyoctanoate and 3-hydroxy-10-undecenoate monomeric units.
- 15. A pressure sensitive adhesive composition comprising:
- (a) a poly(.beta.-hydroxyorganoate) comprising monomeric units of the general formula: ##STR6## wherein: (i) a minor amount of the monomeric units have an R group containing 1-3 carbon atoms; and
- (ii) a major amount of the monomeric units have an R group containing 4-30 carbon atoms;
- (b) a tackifier; and
- (c) a crosslinking agent.
- 16. The pressure sensitive adhesive composition of claim 15 wherein the poly(.beta.-hydroxyorganoate) comprises no greater than about 20 mole percent of the monomeric units having an R group containing 1-3 carbon atoms, and at least about 80 mole percent of the monomeric units having an R group containing 4-30 carbon atoms.
- 17. The pressure sensitive adhesive composition of claim 15 wherein the poly(.beta.-hydroxyorganoate) has unsaturated R groups.
- 18. The pressure sensitive adhesive composition of claim 17 wherein the poly(.beta.-hydroxyorganoate) has no greater than about 20 mole percent monomeric units having unsaturation therein.
- 19. The pressure sensitive adhesive composition of claim 15 wherein the poly(.beta.-hydroxyorganoate) comprises a major amount of at least two different monomeric units having R groups containing 4-30 carbon atoms.
- 20. The pressure sensitive adhesive composition of claim 19 wherein the poly(.beta.-hydroxyorganoate) comprises a major amount of 3-hydroxyoctanoate and 3-hydroxynonanoate monomeric units.
- 21. The pressure sensitive adhesive composition of claim 19 wherein the poly(.beta.-hydroxyorganoate) comprises a major amount of 3-hydroxyoctanoate and 3-hydroxy-10-undecenoate monomeric units.
- 22. The pressure sensitive adhesive composition of claim 15 wherein the poly(.beta.-hydroxyorganoate) comprises a major amount of 3-hydroxyoctanoate.
- 23. The pressure sensitive adhesive composition of claim 15 wherein the poly(.beta.-hydroxyorganoate) comprises a major amount of 3-hydroxynonanoate.
- 24. The pressure sensitive adhesive composition of claim 15 wherein the tackifier is selected from the group consisting of a rosin, a rosin derivative, a resin derived by polymerization of C.sub.5-9 unsaturated hydrocarbon monomers, and a phenol-containing resin.
- 25. The pressure sensitive adhesive composition of claim 15 wherein the crosslinking agent is selected from the group consisting of a radiation crosslinker, a chemical crosslinker, a photoinitiator, a thermal initiator, and a sensitizer.
- 26. The pressure sensitive adhesive composition of claim 25 wherein the crosslinking agent is a photoinitiator.
- 27. The pressure sensitive adhesive of claim 1 wherein the pressure sensitive adhesive is biodegradable.
- 28. The nonplasticized pressure sensitive adhesive of claim 8 wherein the pressure sensitive adhesive is biodegradable.
- 29. A pressure sensitive adhesive preparable by combining components comprising:
- (a) a poly(.beta.-hydroxyorganoatc) comprising monomeric units of the general formula: ##STR7## wherein: (i) a minor amount of the monomeric units have an R group containing 1-3 carbon atoms; and
- (ii) a major amount of the monomeric units have an R group containing 4-30 carbon atoms;
- (b) a tackifier; and
- (c) a crosslinking agent.
Parent Case Info
This is a continuation of application Ser. No. 08/289,685, filed Aug. 12, 1994, now abandoned.
US Referenced Citations (16)
Foreign Referenced Citations (3)
Number |
Date |
Country |
632890 |
Dec 1961 |
CAX |
0511916A1 |
Nov 1992 |
EPX |
609713 |
Aug 1994 |
EPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
289685 |
Aug 1994 |
|