SU1409638A1 - Polymeric composition for hydraulic insulation sheet material - Google Patents

Abstract

This invention relates to polymer compositions based on polyolefins (PO) containing bitumen for the production of waterproofing sheet material used in the construction of open-type impervious screens on canals and ponds. The invention makes it possible to increase the elasticity of the material, reduce its anisotropy in the longitudinal and transverse directions and improve the resistance to light-heat aging due to the content in the composition as an PO mixture (in parts) 5.0-95.0 of low-density polyethylene and 5 , 0-95.0 ethylene copolymer with vinyl acetate with a content of 5-20% vinyl acetate, 10.0-40.0.0 bitumen, and 0.5-1.0 epoxynovolac block copolymer. 2 tab. with (L

Description

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The invention relates to polymeric compositions based on polyolefins containing bitumen from the production of waterproofing sheet material used in the construction of open-type anti-filter screens on canals and ponds.

The aim of the invention is to increase the elasticity, reduce anisotropy in the longitudinal and transverse directions of FDI and improve the resistance to light and heat aging.

The composition contains low density polyethylene (LDPE) (GOST 16337-70) with a melt index of 0.3–7.0 g / 10 min. Copolymer of ethylene with vinyl acetate (CEVA) with a content of 5–20% vilinate TU 6–05 1636-78, oil bitumen

Examples 2-14 (control). Compositions are prepared as described in Example 1.

Examples 15-21 of them 17 and 19 control). Prepared as described in Example 1, an ENBS is introduced simultaneously with the bitumen.

The compositions are given in table.1.

The obtained samples were tested for breaking stress at growth - (br) and relative elongation at break (p) according to GOST 11262-70. The modulus of elasticity was defined as the tangent of the angle of inclination of the tangent to the deformation-load diagram.

The test results are shown in Table. 2. Slow aging

construction brands BN-III, BN-1U, and epok-20 samples are carried out in a climatic

sinovolac block copolymer (ENBS) as a light and temperature stabilizer.

The composition may also contain a filler (chalk, kaolin, talc) to increase the density of the waterproofing material and its amount is determined by the requirements for the density of the sheet material (at least I, O g / cm,

25

chamber with a mercury-xenon lamp for 500 hours.

Claims (1)

Invention Formula Polymer composition for waterproofing sheet material based on polyolefin, containing bitumen, characterized in that, in order to increase elasticity, to reduce either anisotropy in the longitudinal and transverse directions and to preserve properties after light-heat aging, it contains a mixture of low density polyethylene as a polyolefin and a copolymer of ethylene with vinyl acetate with a content of 5-20% vinyl acetate and additionally contains an epoxy novolac block copolymer in the following ratio of components, wt.h .: The composition is obtained by preliminary displacing the granulate of LDPE and CEMA in the melt in an extruder at 15–160 ° C, followed by mixing with bitumen and ENBS and obtaining a sheet material by extrusion through a slit-head. The invention is illustrated by the following examples. I Example 1 (control). i97 May, h LDPE brand 15803-020 with a melt index of 2.0 g / 10 min and 3 mayoch. EVA grade 11104-030 containing 5% vinyl acetate is mixed in the melt on a laboratory extruder at 150 ° C, crushed. Then 100 ma.ch. mixes are mixed with ZOM.S.ch bitumen of the oil construction grade BN-1U in an extruder with a slotted head, to obtain a strip of THICKNESS 1.0 mm. five 0 five 0 g five chamber with a mercury-xenon lamp for 500 hours. Invention Formula Polymer composition for waterproofing sheet material based on polyolefin containing bitumen, characterized in that, in order to increase elasticity, reduce anisotropy in the longitudinal and transverse directions and preserve properties after light-heat aging, it contains a mixture of low-density polyethylene and polyolefin a copolymer of ethylene with vinyl acetate with a content of 5–20% vinyl acetate and additionally contains an epoxy novolac block copolymer in the following ratio of components, wt.h .: Low polyethylene density 5.0-95.0 Sotsolimer.etilena with vinklacetate with a content of 5-20% vinyl acetate 5.0-95.0 Bitum10,0-40,0 Epoxinovolac block copolymer 0.5-1.0 t I I I I I I I It t i i i t i in about in in about about AMA b «I l lO r- - o - -r- 1о r oh oh C FH lO r o in in .10 I T Oi Ti u-1 o fn in c ix tin -vo, d o --j "--f-f-r- rMCsii I I t I I 1L in about in m in o in o in 3 about in c  d go sch (N vO r. r en about 00 vO J- -3CN) NO r r about in about ON r vO m vD sch u ABOUT r about oo o- I about vO I vD n - f " 00 about -cm fo v CO ON N 00 A r - ON CN | h 1Л oo ON CO l in oo CO VO MF 00 fO st fO Q ON 00 00 CM Yu CNJ vO cs VO n NO " cs about VO 00 GO y o 00 MF about ( CSl - in cs 00 cv) O ON CO ON "n Y-. NO o ON in r 00 CO CSI ran r CO in r rO 00 VO ON cs Cv | vO in 00 vD r ON o o r- o CO r CN in NO O - 00 00 "3- NO