Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
194 words
A PROCESS FOR PREPARING A FIRE RESISTANT ADHESIVE COMPOSITION COMPRISING ON A WEIGHT PERCENT BASIS: FROM 20 TO 80 PERCENT POLYCHLOROPRENE; FROM 15 TO 50 PERCENT HEAT ADVANCING, OIL SOLUBLE PHENOLIC RESIN OF WHICH AT LEAST 20 PERCENT IS A RESIN WHICH IS THERMALLY STABLE AT 500*F. AND ABOVE; FROM 1 TO 50 PERCENT ASBESTOS; FROM 2 TO 20 PERCENT OF AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM AND CADMIUM OXIDE; FROM 0 TO 50 PERCENT FILLERS; AND FROM 0.1 TO 2 PERCENT EACH OF A DIALKYL THIODIPROPIONATE AND A NICKEL DIBUTYL DITHIOCARBAMATE ANTIOXIDANT, SAID PROCESS COMPRISING: A. FORMING A MIXTURE OF THE PHENOLIC RESIN AND A PORTION OF THE MAGNESIUM OR CADMIUM OXIDE IN AN ORGANIC SOLVENT, ADMIXING THE SAME UNTIL DISPERSION IS COMPLETE, AND PERMITTING THE ADMIXTURE TO PRE-REACT; B. BLENDING THE POLYCHLOROPRENE ELASTOMER WITH THE REMAINDER OF THE MAGNESIUM OR CADMIUM OXIDES, THE ANTIOXIDANTS, ZINC OXIDE AND ASBESTOS FIBER IN A HIGH SHEAR MIXING APPARATUS AND THEN DISSOLVING THE BLEND IN AN ORGANIC SOLVENT; AND C. BLENDING THE COMPOSITIONS OBTAINED FROM STEPS A AND B AT A TEMPERATURE BELOW ABOUT 140*F. FOR A PERIOD OF AT LEAST 8 HOURS.
Claim 2
Dependent Claim
194 words
A PROCESS FOR PREPARING A FIRE RESISTANT ADHESIVE COMPOSITION COMPRISING ON A WEIGHT PERCENT BASIS: FROM 20 TO 80 PERCENT POLYCHLOROPRENE; FROM 15 TO 50 PERCENT HEAT ADVANCING, OIL SOLUBLE PHENOLIC RESIN OF WHICH AT LEAST 20 PERCENT IS A RESIN WHICH IS THERMALLY STABLE AT 500*F. AND ABOVE; FROM 1 TO 50 PERCENT ASBESTOS; FROM 2 TO 20 PERCENT OF AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM AND CADMIUM OXIDE; FROM 0 TO 50 PERCENT FILLERS; AND FROM 0.1 TO 2 PERCENT EACH OF A DIALKYL THIODIPROPIONATE AND A NICKEL DIBUTYL DITHIOCARBAMATE ANTIOXIDANT, SAID PROCESS COMPRISING: A. FORMING A MIXTURE OF THE PHENOLIC RESIN AND A PORTION OF THE MAGNESIUM OR CADMIUM OXIDE IN AN ORGANIC SOLVENT, ADMIXING THE SAME UNTIL DISPERSION IS COMPLETE, AND PERMITTING THE ADMIXTURE TO PRE-REACT; B. BLENDING THE POLYCHLOROPRENE ELASTOMER WITH THE REMAINDER OF THE MAGNESIUM OR CADMIUM OXIDES, THE ANTIOXIDANTS, ZINC OXIDE AND ASBESTOS FIBER IN A HIGH SHEAR MIXING APPARATUS AND THEN DISSOLVING THE BLEND IN AN ORGANIC SOLVENT; AND C. BLENDING THE COMPOSITIONS OBTAINED FROM STEPS A AND B AT A TEMPERATURE BELOW ABOUT 140*F. FOR A PERIOD OF AT LEAST 8 HOURS.
Claim 3
Dependent Claim
25 words
A process according to claim 1 wherein the polychloroprene is employed in an amount of from 45 to 65 percent by weight of said composition.
Claim 4
Dependent Claim
25 words
A process according to claim 1 wherein the oxide is magnesium oxide and is employed in amounts of from 2 to 10 percent by weight.
Claim 5
Dependent Claim
30 words
A process according to claim 1 wherein the oxide employed is an admixture of magnesium and cadmium oxide in an aggregate amount of from 2 to 10 percent by weight.
Claim 6
Dependent Claim
31 words
A process according to claim 1 wherein from 30 to 100 percent of the phenolic resin employed is a high cure rate resin having thermal stability at temperatures above about 500*F.
Claim 7
Dependent Claim
27 words
A process according to claim 1 wherein the composition produced by Step C is admixed with solvents to a viscosity of from 23,000 to about 90,000 centipoises.
Claim 8
Dependent Claim
29 words
A process according to claim 1 wherein the antioxidants are dilauryl thiodipropionate and nickel dibutyl dithiocarbamate, each employed in an amount of from 0.1 to 2 percent by weight.
Claim 9
Dependent Claim
18 words
A process according to claim 1 wherein Step C is carried out at a temperature below about 120*F.
Claim 10
Dependent Claim
23 words
A process according to claim 1 wherein the composition of Step A is pre-reacted for a period of up to about 2 weeks.