Curing compound and method of curing halogenated polymers
AssigneeR.T. Vanderbilt Company, Inc.
InventorsThomas J. Karol, Francis S. Cheng
Life of this patent
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Abstract
Additives including dithiocarbamyl derivatives of 2,5-dimercapto-1,3,4-thiadiazole (DMTD) useful as curing agents and accelerators. Curable polymer compositions including at least one halogenated polymer and at least one additive including the dithiocarbamyl DMTD derivatives. A method is also disclosed for preparing a cured polymer by admixing at least one halogenated polymer with at least one additive including the dithiocarbamyl DMTD derivatives and subsequently curing the composition.
Claims31
An additive comprising a dithiocarbamyl-1,3,4,-thiadiazole derivative having formula (I), or an isomer thereof:
- where R1 and R2 are independently a radical being either an alkyl, a cycloalkyl, an alkenyl, an aryl, an arylalkyl, or an alkylaryl, or R1 and R2 together form a 3- to 7-membered cyclic ring structure;
- and X is (i) hydrogen, (ii) a dithiocarbamyl radical having formula (II):
- where R3 and R4 are independently a radical being either an alkyl, a cycloalkyl, an alkenyl, an aryl, an arylalkyl, or an alkylaryl, or R3 and R4 together form 3- to 7-membered cyclic ring structure, or (iii) a mixture thereof.
A curable polymer composition comprising a major amount of at least one halogenated polymer and at least one additive comprising a dithiocarbamyl-1,3,4,-thiadiazole derivative having formula (I), or an isomer thereof:
- where R1 and R2 are independently a radical being either an alkyl, a cycloalkyl, an alkenyl, an aryl, an arylalkyl, or an alkylaryl, or R1 and R2 together form a 3- to 7-membered cyclic ring structure;
- and X is (i) hydrogen, (ii) a dithiocarbamyl radical having formula (II):
- where R3 and R4 are independently a radical being either an alkyl, a cycloalkyl, an alkenyl, an aryl, an arylalkyl, or an alkylaryl, or R3 and R4 together form 3- to 7-membered cyclic ring structure, or (iii) a mixture thereof.
An additive comprising a dithiocarbamyl-bis-1,3,4,-thiadiazole derivative having formula (III), or an isomer thereof:
- where X is (i) hydrogen, (ii) a dithiocarbamyl radical having formula (II):
- where R3 and R4 are independently a radical being either an alkyl, a cycloalkyl, an alkenyl, an aryl, an arylalkyl, or an alkylaryl, or R3 and R4 together form 3- to 7-membered cyclic ring structure, or (iii) a mixture thereof.
A curable polymer composition comprising a major amount of at least one halogenated polymer and at least one additive comprising a dithiocarbamyl-bis-1,3,4,-thiadiazole derivative having formula (III), or an isomer thereof:
- where X is (i) hydrogen, (ii) a dithiocarbamyl radical having formula (II):
- where R3 and R4 are independently a radical being either an alkyl, a cycloalkyl, an alkenyl, an aryl, an arylalkyl, or an alkylaryl, or R3 and R4 together form 3- to 7-membered cyclic ring structure, or (iii) a mixture thereof.
A method of preparing a cured polymer composition, which comprises:
- admixing at least one halogenated polymer with at least one additive including at least one thiadiazole derivative selected from the group consisting of:
- (a) a dithiocarbamyl-1,3,4,-thiadiazole derivative having formula (I), or an isomer thereof:
- where R1 and R2 are independently a radical being either an alkyl, a cycloalkyl, an alkenyl, an aryl, an arylalkyl, or an alkylaryl, or R1 and R2 together form a 3- to 7-membered cyclic ring structure;
- and X is (i) hydrogen, (ii) a dithiocarbamyl radical having formula (II):
- where R3 and R4 are independently a radical being either an alkyl, a cycloalkyl, an alkenyl, an aryl, an arylalkyl, or an alkylaryl, or R3 and R4 together form 3- to 7-membered cyclic ring structure, or (iii) a mixture thereof;
- (b) a dithiocarbamyl-bis-1,3,4,-thiadiazole derivative having formula (III), or an isomer thereof:
- where X is (i) hydrogen, (ii) a dithiocarbamyl radical having formula (II):
- where R3 and R4 are independently a radical being either an alkyl, a cycloalkyl, an alkenyl, an aryl, an arylalkyl, or an alkylaryl, or R3 and R4 together form 3- to 7-membered cyclic ring structure, or (iii) a mixture thereof;
- and
- curing the admixture to form the cured composition.
Dependencies are inferred from the claim text.