Copolyamide
AssigneePhillips Petroleum Company
InventorsLacey E. Scoggins, Robert W. Campbell
Life of this patent
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Abstract
Normally solid, moldable polyamides having diamine-derived structural units of the formula ##STR1## wherein each A is individually selected from the group consisting of 5-methylnonamethylene, 2,4-dimethyloctamethylene, 2,4,6-trimethylheptamethylene, and 4-isopropylheptamethylene; first diacid-derived structural units of the formula ##STR2## and second diacid-derived structural units of the formula ##STR3## wherein X is a divalent aliphatic hydrocarbon radical containing from 14 to 46 carbon atoms. Minor amounts of other polyamide-forming materials can be included in the copolyamide to provide up to 30 percent of the nitrogen atoms and up to 30 percent of the carbonyl groups. When used as adhesives, these copolyamides possess very good initial T-peel strength.
Claims24
A normally solid, moldable copolyamide having:
- diamine-derived primary structural units of the formula ##STR12##
- wherein each A is individually selected from the group consisting of 5-methylnonamethylene, 2,4-dimethyloctamethylene, 2,4,6-trimethylheptamethylene, and 4-isopropylheptamethylene;
- first diacid-derived primary structural units of the formula ##STR13## and second diacid-derived primary structural units of the formula ##STR14## wherein X is divalent aliphatic hydrocarbon radical containing from 14 to 46 carbon atoms;
- the nitrogen atoms provided by said diamine-derived primary structural units constituting at least 70 percent, by number, of the total nitrogen atoms in said copolyamide;
- the carbonyl groups provided by said first and second diacid-derived structural units constituting at least 70 percent, by number, of the total carbonyl groups in said copolyamide;
- the molar ratio of the total diamine-derived structural units to the total diacid-derived structural units being in the range of 105:100 to 100:105.
A normally solid, moldable copolyamide having:
- diamine-derived primary structural units of the formula ##STR16## wherein each A is individually selected from the group consisting of 5-methyl-nonamethylene, 2,4-dimethyloctamethylene, 2,4,6-trimethylheptamethylene, and 4-isopropylheptamethylene;
- first diacid-derived primary structural units of the formula ##STR17## and second diacid-derived primary structural units of the formula ##STR18## wherein X is a divalent aliphatic hydrocarbon radical containing from 14 to 46 carbon atoms;
- the nitrogen atoms provided by said diamine-derived primary structural units constituting at least 95 percent, by number, of the total nitrogen atoms in said copolyamide;
- the carbonyl groups provided by said first and second diacid-derived structural units constituting at least 70 percent, by number, of the total carbonyl groups in said copolyamide;
- the molar ratio of the total diamine-derived structural units to the total diacid-derived structural units being in the range of 105:100 to 100:105.
Dependencies are inferred from the claim text.