Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
299 words
A process for producing chlorinated poly(vinyl chloride) resin having a density within the range from about 1.50 to 1.65 g/cc at 25° C., comprising: (a) introducing an aqueous suspension of poly(vinyl chloride) containing from about 15 to about 35% by wt poly(vinyl chloride) into a reactor operable under elevated pressure; (b) removing essentially all oxygen from said suspension and reactor; (c) introducing chlorine into the reactor until the pressure therewithin is in the range from about 10 psig to about 100 psig; (d) soaking the poly(vinyl chloride) under said pressure for a period of from about 1 minute to about 45 minutes at a "soak" temperature in the range from about 60° C. to about 85° C.; (e) irradiating the poly(vinyl chloride) with ultraviolet light at a relatively high and constant intensity in the range from about 2 watts to about 50 watts per gallon of said aqueous suspension; (f) increasing the temperature of said suspension by at least 5° C. autogenously from said soak temperature to a finishing temperature in the range from about 80° C. to about 120° C.; (g) maintaining a finishing temperature in the range from about 80° C. to about 120° C. during chlorination; (h) continuing to introduce chlorine into the reactor as the reaction proceeds, so that the pressure in the reactor is maintained substantially constant within said range of pressure; (i) stopping flow of chlorine into the reactor when sufficient chlorine has been added to produce a suspension of chlorinated poly(vinyl chloride) having said density upon completion of the reaction; and, (j) separating solid macrogranular chlorinated poly(vinyl chloride) from said suspension of chlorinated poly(vinyl chloride) product characterized by having a heat distortion temperature measured by ASTM Test Method D648 which is in the range from about 100° C. to about 135° C.
Claim 2
Dependent Claim
299 words
A process for producing chlorinated poly(vinyl chloride) resin having a density within the range from about 1.50 to 1.65 g/cc at 25° C., comprising: (a) introducing an aqueous suspension of poly(vinyl chloride) containing from about 15 to about 35% by wt poly(vinyl chloride) into a reactor operable under elevated pressure; (b) removing essentially all oxygen from said suspension and reactor; (c) introducing chlorine into the reactor until the pressure therewithin is in the range from about 10 psig to about 100 psig; (d) soaking the poly(vinyl chloride) under said pressure for a period of from about 1 minute to about 45 minutes at a "soak" temperature in the range from about 60° C. to about 85° C.; (e) irradiating the poly(vinyl chloride) with ultraviolet light at a relatively high and constant intensity in the range from about 2 watts to about 50 watts per gallon of said aqueous suspension; (f) increasing the temperature of said suspension by at least 5° C. autogenously from said soak temperature to a finishing temperature in the range from about 80° C. to about 120° C.; (g) maintaining a finishing temperature in the range from about 80° C. to about 120° C. during chlorination; (h) continuing to introduce chlorine into the reactor as the reaction proceeds, so that the pressure in the reactor is maintained substantially constant within said range of pressure; (i) stopping flow of chlorine into the reactor when sufficient chlorine has been added to produce a suspension of chlorinated poly(vinyl chloride) having said density upon completion of the reaction; and, (j) separating solid macrogranular chlorinated poly(vinyl chloride) from said suspension of chlorinated poly(vinyl chloride) product characterized by having a heat distortion temperature measured by ASTM Test Method D648 which is in the range from about 100° C. to about 135° C.
Claim 3
Dependent Claim
54 words
The process of claim 1 wherein said poly(vinyl chloride) resin has a porosity in the range from about 0.1 cc/g to about 0.7 cc/g, a surface area in the range from about 0.7 m 2 /g to about 3 m 2 /g, and an inherent viscosity in the range from about 0.5 to 1.5.
Claim 4
Dependent Claim
46 words
The process of claim 1 wherein said poly(vinyl chloride) resin is suspension polymerized, has a porosity in the range from about 0.2 cc/g to about 0.6 cc/g and a surface area in the range from about 1.0 m 2 /g to about 1.5 m 2 /g.
Claim 5
Dependent Claim
46 words
The process of claim 1 wherein said poly(vinyl chloride) resin is mass polymerized, has a porosity in the range from about 0.1 cc/g to about 0.4 cc/g, and a surface area in the range from about 0.8 m 2 /g to about 1.0 m 2 /g.
Claim 6
Dependent Claim
21 words
The process of claim 3 wherein said finishing temperature is in the range from about 80° C. to about 100° C.
Claim 7
Dependent Claim
21 words
The process of claim 4 wherein said finishing temperature is in the range from about 80° C. to about 100° C.