Coreactive conjugated diene polymer compositions which phase separate when cured
| Title: | Coreactive conjugated diene polymer compositions which phase separate when cured |
|---|---|
| Patent Number: | 5,356,993 |
| Publication Date: | October 18, 1994 |
| Appl. No: | 08/090,855 |
| Application Filed: | July 12, 1993 |
| Abstract: | This invention provides a reactive conjugated diene polymer composition that forms a phase-separated adhesive, sealant, or coating. The composition comprises an epoxidized polymer of conjugated dienes, a second reactive component which is phase separated from the polymerized conjugated diene upon cure, and optionally a tackifying resin. The invention also encompasses adhesive, coating and sealant compositions made with the above composition. |
| Inventors: | Erickson, James R. (Katy, TX); Masse, Michael A. (Richmond, TX); Dillman, Steven H. (Houston, TX); Zimmermann, Esther M. (Houston, TX); Handlin, Jr., Dale L. (Houston, TX) |
| Assignees: | Shell Oil Company (Houston, TX) |
| Claim: | We claim |
| Claim: | 1. A phase separated cured polymeric composition, comprising |
| Claim: | from 20 to 70% by weight of a first epoxidized polymer of at least one saturated or unsaturated conjugated diene; |
| Claim: | from 1 to 30% by weight of a second epoxidized polymer having segments that phase separate from the first epoxidized polymer, wherein the second epoxidized polymer is an epoxidized linear polymer having the structure epoxidized isoprene-styrene/hydrogenated butadiene-epoxidized isoprene; and |
| Claim: | from 0% to 80% by weight of a tackifying resin. |
| Claim: | 2. The composition of claim 1, wherein the first epoxidized polymer has at least four arms of polymerized isoprene and butadiene connected to a divinylbenzene core. |
| Claim: | 3. The composition of claim 2 wherein the second epoxidized polymer has a peak molecular weight of about 6,000. |
| Claim: | 4. The composition of claim 3, wherein the first epoxidized polymer has at least 10 arms and each arm has a peak molecular weight from 3,000 to 18,000. |
| Claim: | 5. The composition of claim 4, wherein the second epoxidized polymer is present at 10% by weight of the composition and the amount of epoxidized polymer equals the amount of tackifying resin. |
| Claim: | 6. A cured phase separated composition, produced by the process of |
| Claim: | blending from 20% to 70% by weight of a first epoxidized polymer of at least one saturated or unsaturated conjugated diene, from 1% to 30% by weight of a second epoxidized polymer which is an epoxidized linear polymer having the structure epoxidized isoprene-styrene/hydrogenated butadiene-epoxidized isoprene, and from 0% to 80% by weight of a tackifying resin; and |
| Claim: | curing the blend of epoxidized polymers to obtain a phase separated composition. |
| Claim: | 7. The composition of claim 6 wherein the second epoxidized polymer has a peak molecular weight of about 6,000. |
| Claim: | 8. The composition of claim 7 wherein the first epoxidized polymer has at least 4 arms connected to a divinylbenzene core, and each arm has a peak molecular weight from 3,000 to 18,000. |
| Claim: | 9. An adhesive composition comprising the phase separated cured composition of claim 1. |
| Claim: | 10. A coating composition comprising the phase separated cured composition of claim 1. |
| Claim: | 11. A sealant composition comprising the phase separated cured composition of claim 1. |
| Claim: | 12. An adhesive composition comprising the phase separated cured composition of claim 6. |
| Claim: | 13. A coating composition comprising the phase separated cured composition of claim 6. |
| Claim: | 14. A sealant composition comprising the phase separated cured composition of claim 6. |
| Current U.S. Class: | 525/89; 525/314; 525/338; 525/383; 525/250 |
| Current International Class: | C08F29702 |
| Patent References Cited: | 3970608 July 1976 Furukawa et al. 4135037 January 1979 Udipi et al. 4237245 December 1980 Halasa et al. 5149895 September 1992 Coolbaugh et al. 5210359 May 1993 Coolbaugh et al. 5229464 July 1993 Erickson et al. |
| Other References: | "Compatibility of EKP-202 With Cationic Cure Vehicles", a product disclosure presented by Shell Oil Co. in the U.S. prior to Jul. 12, 1992. |
| Primary Examiner: | Seidleck, James J. |
| Assistant Examiner: | Zemel, I. |
| Attorney, Agent or Firm: | Tackett, Keith M. |
| Accession Number: | edspgr.05356993 |
| Database: | USPTO Patent Grants |
| Language: | English |
|---|