초록 ▼

The invention relates to a curable polysulfide composition, which has an application in making a preserving coating, and an insulator in the field of road construction, house building, etc. The target of the invention is to obtain a stable polysulfide curable composition for which the cure rate and

The invention relates to a curable polysulfide composition, which has an application in making a preserving coating, and an insulator in the field of road construction, house building, etc. The target of the invention is to obtain a stable polysulfide curable composition for which the cure rate and the cure velocity are independent of the surrounds, to allow the obtaining of vulcanized material with high grade of technical and ecological parameters, avoiding the typical unpleasant smell of mercaptane polysulfides and the toxicity of the curing agents, additives and fillers. The problems is solved using the following curable polysulfide composition: polysulfide polymer and/or copolymer containing up to 1 mol/kg SH groups, with molecular weight from 2,000 to 200,000, polysulfide degree from 2.2 to 4.0, ramification rate up to 4 mol percent and degree of polymerization of 20 to 500 in an amount of 90 to 110 pbw; modifier up to 75 pbw; curing agent from 0.2 to 20 pbw; polar solvent or reagent u to 25 pbw; acceptor from 5 to 50 pbw; fillers and other additives up to 150 pbw.

대표청구항 ▼

A curable polysulfide composition comprising a polysulfide polymer or copolymer, a curing agent, fillers, plasticizers and other special-purpose additives, the said composition containing at least one polysulfide polymer or polysulfide copolymer having a sulfur rank of 2.20 to 4.00, a SH- and SSH- g

A curable polysulfide composition comprising a polysulfide polymer or copolymer, a curing agent, fillers, plasticizers and other special-purpose additives, the said composition containing at least one polysulfide polymer or polysulfide copolymer having a sulfur rank of 2.20 to 4.00, a SH- and SSH- groups content from 0 to 4 mol %, a polymerization degree of 10 to 500, wherein said polysulfide polymer or polysulfide copolymer is present in an amount of 90 to 110 pbw of the composition having the formula [Figure] wherein Sx represents a divalent polysulfide or monosulfide radical; x is an integer ranging from 1 to 6; a1, a2 and a3 are the same different and have values from 0 to 1; y has values from 1 to 10; y′has a value from 0 to 1; y″has a value from 0 to 5; z has a value from 10 to 500; w has a value from 0 to 5; b has a value equal to the degree of polyvalency of R′minus 2 R is a divalent radical selected from the group consisting of: －CnH2n－; －C6H4－; －CnH2nOCnH2n－; －CnH2nSCnH2n－; －CnH2nC6H4CnH2n; －C6H4OC6H4－; －C6H4OCnH2n－; －CnH2nC6H4OC6H4CnH2n－; －C6H4O(CmH2mO)fC6H4－; －C6H4CnH2nOCnH2nC6H4－; －CnH2nO(CmH2mO)fCnH2n－; －CnH2nOC6H4OCnH2n－; [Figure] [Figure] [Figure] [Figure] [Figure] wherein n ranges from 1 to 24; m ranges from 1 to 5; f ranges from 1 to 10; R′, R″, R″′and RIV are the same or different saturated monovalent, hydrocarbon, oxahydrocarbon or thiahydrocarbon radical RV is a saturated monovalent alkyl radical of the kind －SCmH2m+1 or －OCmH2m+1－; Sx is a polysulfide linkage; x ranges from 3 to 5; R1, R2 and R3 are the same or different terminals representing normal or isoalkyl, aryl or aralkyl radicals or groups of the type: －SH; －S －Na+; －SSH; －OH;－CHO; －CnH2n+1; －CnH2nC6H5; －C6H4OC6H5; －CnH2nOC6H5; －CnH2nOCnH2n+1; －C6H5; －C10H7; －C6H4SC6H5; －OCnH2n+1; －OC6H5; －OC7 H10; －OC6H4OCnH2n+1; －CnH2nOH; －C6H4OH; －OC6H4C6H4OH; －OCnH2nOH; －O(CnH2n)m－NHC6H5; [Figure] [Figure] [Figure] wherein Ro, Roo and Rooo are the same or different monovalent radicals of the group: －OCmH2m+1; －OCmH2mC6H5 or －CmH2m+1; n1 has values from 1 to 10; m has values from 1 to 5; w has values from 1 to 10; R′is a polyvalent radical with a weight up to 10% of the molecular weight of the said polymer or copolymer and is a radical of a polyfunctional compound selected from the group; XR X2; XCH2CHXRIICHXCH2X; R CX3; RIVX4; [Figure] [Figure] [Figure] [Figure] [Figure] [Figure] wherein x is a halogen atom RI, RII and RIII are hydrocarbon, oxahydrocarbon, thiahydrocarbon or aralkyl radicals; RIV is selected from the group consisting of alkyl, aryl, aralkyl radicals or is a carbon atom; RV, RVI, RVII, RVIII and RIX are alkyl radicals representing a hydrocarbon or oxahydrocarbon; Ro, Roo and Rooo are the same or different monovalent radicals of the group: －OCmH2m+1; －CnH2nC6H5; or －OC6H5, R″represents a divalent radical free of SH, SSH and Sx groups and is selected from the group: [Figure] CH2CH2CH2OCH2CH2CH2Si(OCmH2m)2; [Figure] [Figure] [Figure] [Figure] [Figure] or [Figure] [Figure] wherein m has values from 1 to 5; w1 has values from 4 to 6; w2 has values from 4 to 6; Ro and Roo are the same or different having the corresponding meaning of Ro, Roo, Rooo included in R, or they are hydrogen atoms or alkyl radicals and the said composition comprises as well: a modifier of 3 to 75 pbw of the composition wherein the modifier polymerizes, copolymerizes or cocures with the basic polysulfide polymer or copolymer and wherein the modifier is a polysulfide polymer free of －SH and －SSH groups, the said polymer having an average molecular weight of up to 2000, a degree of polymerization of 2 to 10, a sulphur rank of 2.5 to 5 and the formula R1－(Sx1)a－[RSx1]y1－R2 wherein sx1 is a polysulfide linkage x1 has values ranging from 2 to 6; y1 has values from 3 to 10; a is from 0 to 1; and R, R1 and R2 are as defined above excepting －SH and －SSH; a curing agent of 0.2 to 20 pbw of the composition; a polar reagent and/or solvent of 10 to 25 pbw of the composition; an acceptor of 5 to 50 pbw of the composition; and fillers and other additives of up to 150 pbw.