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Emulsion polymer composition and use thereof in low odor waterproofing coatings

A technology of polymers and water-based polymers, applied in other home appliances, coatings, applications, etc., can solve the problems of low performance, achieve low odor, environmental friendliness, and good processability

Active Publication Date: 2020-06-30
ARKEMA FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Competitors may offer low-odor products, but performance may be 20% lower than conventional products for the low-odor advantage

Method used

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  • Emulsion polymer composition and use thereof in low odor waterproofing coatings
  • Emulsion polymer composition and use thereof in low odor waterproofing coatings
  • Emulsion polymer composition and use thereof in low odor waterproofing coatings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] Prepare a three liter jacketed glass reactor equipped with a stirrer (double impeller type), reflux condenser and stainless steel or PTFE feed lines. Add the initial charge to the reactor. The reactor was then heated to 90°C. The monomer feed and oxidant feed were prepared in advance for the stable pre-emulsion and fine solution respectively (see Table 2 below).

[0106] When the desired temperature is reached and stabilized, monomer feed and oxidant feed are fed into the reactor. With proper agitation, the feed was continued over 3 hours. After the feeds, the reaction was maintained at 90 °C for 1 hour.

[0107] The reactor was then cooled to below 80 °C and the redox reaction was reduced by adding a post-oxidant (a solution of 1 g of 70% tert-butyl hydroperoxide in 9 g of water) and a post-reductant (a solution of 0.9 g of Bruggolite FF6M in 9 g of water). Introduce post-reaction treatment (relative to residual monomer). Feed continued for 1 hour.

[0108] The p...

Embodiment 2

[0113] The emulsion polymer was prepared as described for the synthesis in Example 1, except that the content of chain transfer agent (isooctyl-3-mercaptopropionate) was higher (0.91% relative to a)+b) , and hydroxyethyl methacrylate was used instead of hydroxyethyl acrylate (see Table 3 below).

[0114] table 3 : be used for the composition of embodiment 2

[0115]

[0116]

Embodiment 3

[0117] Embodiment 3 (comparative example)

[0118] The emulsion polymer was prepared as described for the synthesis in Example 1, except that acrylic acid (d1) was absent (see Table 4 below).

[0119] Table 4 : for the composition of Comparative Example 3

[0120]

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Abstract

An aqueous polymer dispersion, said polymer comprises polymerized units issued from the following monomers with related weight proportions based on 100 parts of weight of a) +b) : a) 50 to 90% of a monoethylenically unsaturated non-ionic monomer, b) 10 to 50% of a vinyl aromatic monomer or of methyl methacrylate, c) 1 to 5% of a hydroxy-containing (meth) acrylate, d) 0.1 to 3% of an acid monomer selected from d1) an acid monomer selected from a monocarboxylic or dicarboxylic acid monomers and d2) an acid monomer selected from phosphorous-based or sulfur-based strong acid monomers or / and theirsalts, or from the mixtures of d1) and d2), e) 0.001 to 0.5% of a chain transfer agent, and f) 0 to 1% one of an internal crosslinker bearing at least two copolymerisable ethylenic unsaturations, thesaid polymer has a Tg measured by DSC from -30 to 0 DEG C and a gel content of 0 to 60%, formed during the polymerization. In addition, a specific process of preparation of said dispersion, a coatingcomposition comprising said dispersion, uses of said dispersion in waterproofing cementitious waterproofing coatings and the final waterproofing coating resulting therefrom were provided.

Description

technical field [0001] The present invention relates to an aqueous dispersion for two-component water-repellent cementitious coatings, which has low VOC, low odor and ammonia emission of less than 50 ppm, preferably not more than 30 ppm, a process for preparing the aqueous dispersion, comprising, in addition to said dispersion The two-component waterproof coating composition of cement powder, the application in the field of cement waterproof coating, and the obtained final product (waterproof coating) with high application performance balance. Background technique [0002] US 6,617,387 claims ammonia-free polymer dispersions comprising a) 40-80% by weight of C2-C12 acrylates; b) 10-40% by weight of vinylaromatic monomers and / or C1-C4 methacrylates Esters; c) 2-15% by weight of C2-C10 alkanediol and acrylic acid or methacrylic acid; d) not more than 1% by weight of ethylenically unsaturated monomers having at least one acid group or salts thereof; e) Less than 5% by weight o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F212/08C08F220/06C08F222/02C09D133/08
CPCC08F2/24C08F2/26C08F2/30C08F222/02C08F230/02C08F220/1804C04B2111/27C04B2103/0046C04B28/02C04B2111/00482C04B2103/0065C04B28/04C04B40/065C08F220/1808C09D133/08C08F2/38C08F220/1811C08F212/08C08F220/20C08F220/06C08F220/382C08F220/14C08F220/585C04B14/06C04B14/28C04B24/243C04B24/2641C04B24/2664C04B38/10C04B2103/30C04B24/163C04B24/2688C08K3/013C04B41/483C08F220/56C08F222/06C08F236/02C08F2800/20C08F2810/40C08K3/26C08K3/36C08K5/36C08K2003/262
Inventor 周华陈海明伍文君孟祥玲L-M·塞济M·路格力
Owner ARKEMA FRANCE SA