PROCESS ADDITIVES AND USE THEREOF IN ROTARY MOULDING Russian patent published in 2016 - IPC C08J3/20 C08K5/00 C08K5/1545 B29C41/06 

FIELD: chemistry.

SUBSTANCE: invention relates to method of producing polymer hollow item, wherein method includes: a) filling mold with polymer composition and polymer-stabilising amount of composition stabilisers, wherein composition stabilisers contain at least one compound based on chromane according to formula V

,

where R₂₁ is substitute, which can be identical or different in positions from 0 to 4 of aromatic part of formula V and independently selected from: C₁-C₁₂-hydrocarbyl; NR′R′′, where each substitute of R′ and R′′ is independently selected from H and C₁-C₁₂-hydrocarbyl; or OR₂₇, where R₂₇ is selected from: H; C₁-C₁₂-hydrocarbyl; COR′′′; or Si(R₂₈)₃, where R′′′ is selected from H or C₁-C₂₀-hydrocarbyl; and where R₂₈ is selected from C₁-C₁₂-hydrocarbyl or alcoxy group; R₂₂ is selected from: H; or C₁-C₁₂-hydrocarbyl; R₂₃ is selected from H; or C₁-C₂₀-hydrocarbyl; and each substitute of R₂₄-R₂₅ are independently selected from: H; C₁-C₁₂-hydrocarbyl; or OR′′′′, where R′′′′ is selected from H or C₁-C₁₂-hydrocarbyl; and R₂₆ is H or link, which together with R₂₅ forms =O, provided that, when R₂₇ is H, stabilizer composition does not include antistatic agent consisting of ethoxylated amide and/or ethoxylated amine; b) mold rotation around at least 1 axis, while simultaneously heating mold in drying chamber at temperature sufficient for fusion of polymer composition and its distribution at mold walls; c) cooling of mould; and d) opening of mould for removal of produced as result product, result of which is polymer hollow item.

EFFECT: application of polymer-stabilising amount of process system of stabilisers improves (reduces) cycle duration of action on polymer compositions during rotor forming, with simultaneous expansion of technological window in process.

33 cl, 3 dwg, 3 tbl