EP0280325A2
Expired / Lapsed
EP
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Melt stabilization of poly (arylene sulfide sulfone) S
Assignee: Phillips Petroleum Co
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Filing: 1988-02-26
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Granted: —
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Expires: 2008-02-26
Abstract
Abstract Improved poly(arylene sulfide sulfone)s are prepared by contacting these polymers with a zinc source, optionally first with an alkali metal base, for a period of time sufficient to incorporate enough zinc cations to improve the melt stability of the polymers. The polymer can be subsequently cured to increase molecular weight.
Inventors
- 👤 Rex Leo Bobsein
- 👤 Harold Dean Yelton
- 👤 Mark Weston Woods
- 👤 Merlin Ray Lindstrom
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 04:10
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08K; C08K3/00; C08K3/16; C08G75/02; C08G75/0204; C08G75/0236; C08G75/024; C08G75/025; C08G75/0259; C08G75/0277; C08G75/0281; C08G75/0286; C08G75/029; C08G75/0295; C08K3/10; C08K3/105; C08K3/18; C08K3/20; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
31 words
A method for preparing a melt stabilized polymer, characterized by contacting a poly(arylene sulfide sulfone) with a zinc source to obtain a zinc cations-containing poly(arylene sulfide sulfone) having improved melt stability.
Claim 2
Independent Claim
31 words
A method for preparing a melt stabilized polymer, characterized by contacting a poly(arylene sulfide sulfone) with a zinc source to obtain a zinc cations-containing poly(arylene sulfide sulfone) having improved melt stability.
Claim 3
Dependent Claim
42 words
The method of claim 1, characterized in that said poly(arylene sulfide sulfone) has been obtained by contacting in a polar organic solvent a polyhaloaromatic sulfone monomer and an alkali metal suflide under polymerization conditions to obtain a polymer, and recovering said polymer.
Claim 4
Dependent Claim
31 words
The method of claim 2, characterized in that water is also present in said polar organic solvent in a molar ratio of 2:1 to 12:1 of water to alkali metal sulfide.
Claim 5
Dependent Claim
43 words
The method of claim 2, characterized in that said recovered polymer is further treated with a dilute aqueous alkali metal base; in particular wherein said alkali metal base is an alkali metal hydroxide; in particular wherein said alkali metal hydroxide is sodium hydroxide.
Claim 6
Independent Claim
43 words
The method of any of claims 2 to 4, characterized in that said polyhaloaromatic sulfone is a dihaloaromatic sulfone and said polar organic solvent is an organic amide; in particular wherein said dihaloaromatic sulfone is bis(p-chlorophenyl) sulfone and said organic amide comprises N-methyl-2-pyrrolidone.
Claim 7
Independent Claim
98 words
The method of any of claims 2 to 5, characterized in that said alkali metal sulfide has been prepared from an alkali metal hydrosulfide and an alkali metal base employing a molar ratio of about 1:1 alkali metal hydrosulfide to alkali metal base, the molar ratio of water with respect to the alkali metal hydrosulfide is in the range of 2:1 to 30:1, and the monomer employing a molar ratio of 0.95:1 to 1.05:1 with respect to the alkali metal hydrosulfide; in particular wherein said alkali metal base is selected from alkali metal hydroxides and alkali metal carbonates.
Claim 8
Independent Claim
23 words
The method of any of the preceding claims, characterized in that said polymer is cured after having been contacted with said zinc source.
Claim 9
Independent Claim
52 words
The method of any of the preceding claims, characterized in that said contacting of said polymer with said zinc source is carried out at a temperature from 0 to 300 °C and at a pressure from 0.1 to 10.4 MPa for a period of time ranging from 0.5 min. to 3 hours.
Claim 10
Independent Claim
54 words
The method of any of the preceding claims, characterized in that said zinc source is selected from zinc metal, zinc oxide and zinc salts; in particular wherein said zinc source is used in an amount of from 0.01 to 10 weight percent based on the total weight of poly(arylene sulfide sulfone) plus zinc source.
Claim 11
Independent Claim
19 words
The method of any of the preceding claims, characterized in that said zinc source is selected from zinc salts.
Claim 12
Dependent Claim
19 words
The method of claim 10, characterized in that said zinc salt is selected from zinc halides and zinc carboxylates.
Claim 13
Dependent Claim
19 words
The method of claim 11, characterized in that said zinc salt is selected from zinc acetate and zinc chloride.
Claim 14
Independent Claim
23 words
The method of any of claims 10 to 12, characterized in that said zinc salt is a zinc salt in an aqueous solution.
Claim 15
Dependent Claim
45 words
The method of claim 9, characterized in that said zinc source is zinc oxide which is contacted with said polymer by melt mixing; in particular wherein from 0.2 to 1 weight percent zinc oxide, based on the total weight, is melt mixed with said polymer.
Claim 16
Dependent Claim
38 words
The method of claim 14, characterized in that said melt mixing is conducted in an extruder at a temperature from 330 to 370°C and about ambient pressure for a period of time ranging from 3 to 10 sec.
Claim 17
Independent Claim
29 words
The method of any of the preceding claims, characterized in that said poly(arylene sulfide sulfone) is a poly(phenylele sulfide sulfone) represented by repeating units of the structural formula I
Claim 18
Independent Claim
42 words
A method for preparing a polymer having improved melt stability, characterized by contacting in a polar organic solvent a polyhaloaromatic sulfone monomer, an alkali metal sulfide and a soluble zinc source under polymerization conditions to obtain a polymer having incorporated zinc cations.
Claim 19
Independent Claim
42 words
A method for preparing a polymer having improved melt stability, characterized by contacting in a polar organic solvent a polyhaloaromatic sulfone monomer, an alkali metal sulfide and a soluble zinc source under polymerization conditions to obtain a polymer having incorporated zinc cations.
Claim 20
Dependent Claim
19 words
The method of claim 17, characterized in that said zinc source is added at the end of the polymerization.
Claim 21
Dependent Claim
35 words
The method of claim 17 or 18, characterized in that said zinc source is a soluble zinc salt; in particular wherein said soluble zinc salt is as defined in any of claims 11 and 12.
Claim 22
Dependent Claim
33 words
The method of any of claims 17 to 19, characterized in that said polymer is a poly(phenylene sulfide sulfone) represented by repeating units of the structural formula I has defined in claim 16.
Claim 23
Dependent Claim
16 words
A melt stable polymer composition comprising poly(arylene sulfide sulfone), characterized by a content of zinc cations.
Claim 24
Dependent Claim
16 words
A melt stable polymer composition comprising poly(arylene sulfide sulfone), characterized by a content of zinc cations.
Claim 25
Dependent Claim
40 words
The composition of claim 21, characterized in that said composition also contains at least one additional component selected from pigments, fillers, extenders, plasticizers and stabilizers; in particular wherein said additional component is inorganic fibers selected from asbestos, glass and carbon.
Claim 26
Dependent Claim
36 words
The composition of claim 21 or 22, characterized in that said poly(arylene sulfide sulfone) and said zinc cations are present in the range of 90 to 99.99 weight percent and 0.01 to 10 weight percent, respectively.
Claim 27
Dependent Claim
35 words
The composition of any of claims 21 to 23, characterized in that said poly(arylene sulfide sulfone) is a poly(phenylene sulfide sulfone) represented by repeating units of the structural formula I as defined in claim 16.
Claim 28
Dependent Claim
18 words
The composition of any of claims 21 to 24, characterized in that said polymer composition has been cured.
Claim 29
Independent Claim
21 words
A method for improving the melt stability of polymers comprising poly(arylene sulfide sulfones), characterized by incorporating zinc cations into said polymers.
Claim 30
Independent Claim
21 words
A method for improving the melt stability of polymers comprising poly(arylene sulfide sulfones), characterized by incorporating zinc cations into said polymers.
References Cited (Backward Citations)
No citation records indexed.
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