Claims
- 1. A process for preparing a polyarylsulfide oligomer with phenolic hydroxyl endgroups comprising:
- a. combining an aryldihalide, a monohalo phenolic hydroxyl aryl group, sodium sulfide nonahydrate, sodium carbonate and a non-aqueous solvent to form a mixture; and
- b. heating said mixture so as to drive off water of hydration from said sodium sulfide and to react said aryldihalide with said sodium sulfide to form said polyarylsulfide oligomer.
- 2. The process for preparing a polyarylsulfide oligomer according to claim 1 further comprising the step of precipitating said polyarylsulfide oligomer from said solvent by mixing with an aqueous solvent.
- 3. The process for preparing a polyarylsulfide oligomer according to claim 1 wherein said aryldihalide is a biphenyl dihalide.
- 4. The process for preparing a polyarylsulfide oligomer according to claim 3 wherein said biphenyldihalide is 4,4'-dibromobiphenyl.
- 5. The process for preparing a polyarylsulfide oligomer according to claim 3 wherein said nonaqueous solvent is 1-methyl-2-pyrrolidinone.
- 6. A process for forming a finish surface on a composite material comprising:
- a. placing a composite material in contact with a polymer with a thermally-reversible isocyanate-phenolic hydroxyl labile hydrogen linkage heated so as to dissociate said polymer into a compound with isocyanate functionality and a compound with phenolic hydroxyl labile hydrogen functionality; and
- b. cooling said dissociated phenolic hydroxyl labile hydrogen and isocyanate compounds so as
- 1) to reform said polymer with a surface suitable for exterior finish applications and
- 2) to bond said polymer to said composite material.
- 7. The process according to claim 6 wherein said thermally-reversable polymer contains at least one segment selected from the group of segments consisting of polycarbonate, polysulfide, polyimidazolidine, polyimide, and polyester.
- 8. The process according to claim 6 wherein said phenolic hydroxyl labile hydrogen segment contains polycarbonate.
- 9. The process according to claim 8 wherein said polycarbonate has a degree of polymerization of about 9.
- 10. The process according to claim 6 wherein said composite material is selected from the group of composite materials consisting of polypropylene and polyethylene terephthalate.
Parent Case Info
This is a continuation-in-part of our prior application Ser. No. 07/851,840 filed Mar. 16, 1992, now abandoned, which is a continuation of Ser. No. 07/651,020 filed Feb. 4, 1992, now U.S. Pat. No. 5,097,010 and Ser. No. 07/740,335 filed Aug. 5, 1991, now U.S. Pat. No. 5,239,039, both of which are continuations-in-part of Ser. No. 07/475,112 filed Feb. 5, 1990, now abandoned; each of the prior applications is hereby incorporated herein by reference as if completely rewritten herewithin.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/US92/06493 |
8/4/1992 |
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|
2/3/1994 |
2/3/1994 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO91/11476 |
8/8/1991 |
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US Referenced Citations (90)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0249809 |
Dec 1987 |
EPX |
Related Publications (1)
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Number |
Date |
Country |
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740335 |
Aug 1991 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
651020 |
Feb 1991 |
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Continuation in Parts (3)
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Number |
Date |
Country |
Parent |
851840 |
Mar 1992 |
|
Parent |
475112 |
Feb 1990 |
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Parent |
475112 |
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