THERMOPLASTIC GEL COMPOSITION TRANSFORMED IN THERMOACTIVE GEL UNDER ACTION OF RADIATION Russian patent published in 2009 - IPC C08L53/02 C08J3/75 C08J3/28 C08F297/04 

FIELD: chemistry.

SUBSTANCE: thermoplastic gel composition which can be cured under the action of radiation includes: (a) approximately from 5 to 40 wt % of cured block-copolymer selected from the group consisting from compounds of formula (II) or (III) or (IV), whereat A is vinyl aromatic hydrocarbon block with molecular mass from 4000 to 30000, HD is hydrogenated conjugated diene block with molecular mass from 10000 to 100000, Y is multifunctional binding agent, UD is conjugated diene block with molecular mass from 1000 to 80000 or conjugated diene block with molecular mass from 1000 to 80000 which is partially hydrogenated, x is integer number from 1 to 20, y is equal to 0 or 1, z is integer number from 1 to 20 and in the formulas (II) and (III) the sum (x+z) is in the range from 2 to 30; (b) from 60 to 90 wt % of the liquid component selected from the filling oils, plasticisers and solvents compatible with the curable copolymer; (c) from 1 to 20 wt % at least one curative agent selected from bifunctional or multifunctional acrylate or metaacrylate monomers or vinyl ethers; d) optionally from 0 to 10 wt % of the expanding microspheres; and (e) optionally from 0 to 3 wt % of the photoinitiator whereat total component amount is equal 100 wt %. The thermoreactive article containing the thermoplastic gel composition subjected to the action of radiation is described as well as the thermoplastic gel composition which can be cured under the action of radiation and includes: (a) from 5 to 40 % w/w of the mixture of curable block-copolymer with formula (I) whereat S is polystyrol block, B is polybutadiene polymer block having the content of 1,2-vinyl groups in the range from 10 to 80 mole %, Y is the radical of the binding agent, x is integer number from 1 to 20, preferably 2, y - integer number from 0 to 20, preferably 2, with sum (x+y) being in the range from 2 to 30; and block-copolymer of the (polystyrol -hydrogenated polybutadiene -polystyrol ) type with ratio (block-copolymer of formula (I): (block-copolymer of (polystyrol -hydrogenated polybutadiene -polystyrol ) type being in the range from 3:1 to 1:3; (b) from 60 to 90 wt % of the liquid component selected from the filling oils, plasticisers and solvents compatible with the curable copolymer; (c) from 1 to 20 wt % of at least one curative agent selected from bifunctional or multifunctional acrylate or metaacrylate monomers or vinyl ethers; (d) from 0.1 to 10 wt % of expanding microspheres; and (e) from 0 to 3 wt % of photoinitiator whereat total component amount is equal 100 wt %.

EFFECT: increase of high-temperature shrinkage resistance.

10 cl, 8 tbl, 30 ex