Aqueous polymer compositions

Details Aqueous polymer compositions Aqueous polymer compositions

1996-03-11

1997-07-29

Cain, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524354, C08L 5100

Patent

active

056522959

DESCRIPTION:


DESCRIPTION
EXAMPLE
feed 2, 12.5 g of a 20% strength by weight aqueous solution of a mixture of ethoxylated fatty alcohols (C.sub.16/18, degree of ethoxylation: 18, emulsifier 1) and 2.5 g of a 20% strength by weight aqueous solution of the active substance corresponding to Dowfax 2A1 (emulsifier 2) were mixed with one another and the mixture was heated to 85.degree. C. Thereafter, the mixture was kept at 85.degree. C. for 15 minutes and, while maintaining the polymerization temperature, the remaining amount of feed 1 was then added to the polymerization vessel (in the course of 2 hours) and, beginning at the same time, the remaining amount of feed 2 was introduced (in the course of 2 hours 15 minutes). The system was then left to stand for a further 2 hours at 85.degree. C. while stirring. After the mixture had cooled to room temperature, 12 g of a 10% strength by weight aqueous sodium hydroxide solution were added. 48.9% by weight. monomer II. methyl methacrylate. prepared from 100 ml of each of the aqueous polymer dispersions from a) by stirring in Zg of a 40% strength by weight aqueous solution of glyoxal:


______________________________________ Polymer Dispersion system used Z [g] Ratio R ______________________________________ SV1 DV 0 -- SV2 DV 0.32 0 SV3 D1 0 -- S1 D1 0.08 1:0.25 S2 D1 0.16 1:0.5 S3 D1 0.32 1:1 S4 D1 0.65 0.5:1 SV4 D3 0 -- S5 D3 0.32 1:1 SV5 D2 0 -- S6 D2 0.28 1:0.5 S7 D2 0.56 1:1 ______________________________________
About 500 .mu.m thick polymer films were prepared from the polymer systems from b) by forming a film in a silicone pan from a defined amount of polymer dispersion over a period of 4 days at 23.degree. C. and 50% relative humidity, and the films were subjected to the following tests: (THF) for 24 hours at room temperature. The swelling value Q is the THF absorption by the sample, based on the mass of the initial sample in % (determined gravimetrically). The larger Q, the lower is the cohesion. break D [%] 200 mm/min, a test temperature of 23.degree. C. and with the use of sample shape S2. The larger K and the smaller D, the more pronounced is the cohesion.


TABLE 1 ______________________________________ Polymer system Q K D ______________________________________ SV1 963 2.7 546 SV2 943 2.7 545 SV3 712 3.5 504 S1 593 4.0 416 S2 541 4.2 369 S3 487 4.5 338 S4 476 4.0 304 SV5 650 4.7 468 S6 428 6.4 297 S7 365 6.9 240 ______________________________________
Coating materials were formulated from the polymer systems S and SV according to the following recipe:


______________________________________ Water 89 g 25% strength by weight aqueous solution of the sodium 6 g salt of a copolymer of maleic acid and diisobutylene (dispersant for pigments and fillers) Parmetol .RTM. A23 (preservative) 2 g Natrosol .RTM. 250 HR (4% strength by weight aqeuous 9 g thickener solution based on hydroxyethylcellulose) Propylene glycol 32 g Butyldiglycol 10 g Agitan .RTM. 702 (antifoam) 4 g Kronos .RTM. RHD-2 (finely divided TiO.sub.2 pigment) 210 g Talc SE Micro (filler) 106 g Collacral PU 75 (polyurethane associative thickener) 10 g Butyldiglycol 13 g Kristallol .RTM. K60 (hydrocarbon mixture as film 5 g formation assistant) Polymer system S or SV 504 g ______________________________________ Resin Coat
First, a high-gloss solvent-containing alkyd resin coating material was applied to a PVC film to give a layer which was 120 .mu.m thick when wet, and the layer was dried for one day at room temperature and for 7 days at 50.degree. C. in a through-circulation drying oven. Thereafter, a 200 .mu.m thick wet layer of a coating material from d) was applied to the alkyd resin coat and was dried for 3 days at 23.degree. C./65% relative humidity. Thereafter, the coat surface was damaged by cutting with a knife, and the films prepared in this manner were subjected to a plurality of successive frost-thaw cycles to test the wet adhesion of the topcoat on the alkyd resin basecoat. Within one frost-thaw cycle, the coated films were first stored for 8 hours in wa

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Kreis et al., Developments in Ureido Functional Monomer . . . Water-Borne and Higer-Solids COating Symposium of Feb. 3-5, 1988 New Orleans, Louisianna.

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