Claims
- 1. A mold or former for producing a natural or synthetic rubber article having on its surface a release composition comprising a water-borne high Tg polymer formed from:
(1) at least one hydrophobic monomer; and (2) at least one hydrophilic monomer, wherein said water-borne polymer has a Tg of at least −10° C.
- 2. The mold or former of claim 1 wherein said water-borne polymer comprises an emulsion polymer.
- 3. The mold or former of claim 2 wherein said water-borne polymer has a particle size of from 0.05 to 1.5 microns.
- 4. The mold or former of claim 3 wherein said water-borne polymer has a particle size of from 0.15 to 0.9 microns
- 5. The mold or former of claim 1 wherein said hydrophobic monomer comprises styrene.
- 6. The mold or former of claim 1 wherein said hydrophilic monomer is an acid monomer.
- 7. The mold or former of claim 1 wherein said mold release composition further comprises a surfactant.
- 8. The mold or former of claim 1 wherein said release composition further comprises microspheres.
- 9. The mold or former of claim 1 wherein said release composition further comprises a dispersant.
- 10. The mold or former of claim 1 wherein said water-borne polymer further comprises a cross-linker.
- 11. The mold or former of claim 1 wherein said release composition further comprises a rheology modifier.
- 12. The mold or former of claim 1 wherein said release composition further comprising a coagulant.
- 13. The mold or former of claim 1 wherein said high Tg polymer comprises:
a) from 20 to 35 percent by weight of methyacrylic acid; b) from 65 to 80 percent by weight of styrene; and c) from 0.5 to 1.5 percent by weight of a crosslinker.
- 14. The mold or former of claim 1 wherein said release composition is free of silicon compounds.
- 15. An article comprising a formed natural or synthetic rubber article having thereon a coating composition comprising a water-borne high Tg polymer formed from:
(1) at least one hydrophobic monomer; and (2) at least one hydrophilic monomer, wherein said water-borne polymer has a Tg of at least −10° C.
- 14. The article of claim 12 wherein said article is powder-free.
- 15. A process for making a glove comprising:
(a) immersing a glove former in a coagulant solution containing a release composition comprising a water-borne polymer with Tg of at least −10° C. formed from at least one hydrophobic monomer, and at least one hydrophilic monomer, producing a coated former; (b) immersing said coated mold into a natural rubber latex to coat the former with said latex; (c) immersing the latex coated former into a inner surface coating composition; (d) curing the latex in an oven; and (e) removing the finished glove from the former.
- 16. The process of claim 14 wherein step (a) comprises two separate steps comprising:
a.1) immersing said ceramic former into said water-borne polymer release composition; and a.2) immersing said release coated ceramic former into a coagulant solution.
- 17. The process of claim 14 wherein said the latex coated former of step (b) is leached in water prior to step (c).
- 18. A release composition comprising:
a) a water-borne high Tg polymer formed from at least one hydrophobic monomer; and at least one hydrophilic monomer, wherein said water-borne polymer has a Tg of at least −10° C.; b) a coagulant.
- 19. The composition of claim 17 wherein said coagulant is a calcium salt.
- 20. The composition of claim 17 further comprising microspheres.
- 21. The composition of claim 17 further comprising a rheology modifier.
- 22. The composition of claim 17 further comprising a surfactant.
Parent Case Info
[0001] This application is a continuation-in-part of pending application serial number 09/790,093.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09790093 |
Feb 2001 |
US |
Child |
09882222 |
Jun 2001 |
US |