Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
117 words
A method in the preparation of poly(arylene sulfide) for dehydrating pre-polymerization mixtures comprising a reaction mixture of a sulfur source and an organic amide, characterized by (a) contacting a reaction mixture comprising a sulfur source and an organic amide at a first pressure within a range of 138 - 414 kPa (gauge) and an initial temperature in the range of 149 - 204°C to obtain a complex of the reactants, and subsequently (b) simultaneously, over a period of time, decreasing said pressure to a second pressure within the range of 20 - 172 kPa (gauge) and increasing the temperature to a final temperature, at which, at the second pressure, essentially all water is removed from the mixture.
Claim 2
Independent Claim
117 words
A method in the preparation of poly(arylene sulfide) for dehydrating pre-polymerization mixtures comprising a reaction mixture of a sulfur source and an organic amide, characterized by (a) contacting a reaction mixture comprising a sulfur source and an organic amide at a first pressure within a range of 138 - 414 kPa (gauge) and an initial temperature in the range of 149 - 204°C to obtain a complex of the reactants, and subsequently (b) simultaneously, over a period of time, decreasing said pressure to a second pressure within the range of 20 - 172 kPa (gauge) and increasing the temperature to a final temperature, at which, at the second pressure, essentially all water is removed from the mixture.
Claim 3
Dependent Claim
19 words
The method of claim 1 characterized in that said final temperature is in a range of 204 - 260°C.
Claim 4
Dependent Claim
32 words
The method of claim 2 characterized in that said first pressure is in a range of 172 - 290kPa (gauge) and said final temperature is in a range of 221 - 249°C.
Claim 5
Dependent Claim
25 words
The method of claim 1, 2, or 3 characterized in that said sulfur source is an alkali metal sulfide and the organic amide is N-methyl-pyrrolidone.
Claim 6
Independent Claim
37 words
The method of any of claims 1 to 4 characterized in that additional compounds are present in the reaction mixture, said compounds being chosen from bases, alkali metal carboxylates, alkali metal carbonates, lithium halides, and lithium borate.
Claim 7
Dependent Claim
14 words
The method of claim 4 characterized in that said sulfur source is sodium sulfide.
Claim 8
Dependent Claim
22 words
The method of claim 4 or 5 characterized in that said sulfur source is sodium sulfide and sodium acetate is also present.
Claim 9
Dependent Claim
15 words
A dehydrated pre-polymerization mixture produced by the method of any of claims 1 to 7.
Claim 10
Dependent Claim
24 words
A method for preparing polymers in which the dehydrated pre-polymerization mixture of claim 8 is contacted under polymerization conditions with at'least one polyhalo-substituted compound.