Poly(hydroxystyrene) stain resist
a technology of hydroxystyrene and stain resistance, applied in the field of poly(hydroxystyrene) stain resistance, can solve the problems of limited uv stability, limited fastness, limited coffee and mustard stain resistance,
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example 1
[0134]Into a 500-mL round-bottom flask was added poly(p-hydroxystyrene) (20 g, M.W. 11,200, Triquest LP) and dimethyl formamide (DMF, 160 mL). To the resulting solution was added sulfur trioxide N,N-dimethylformamide complex (SO3.DMF, 12.7 g g, 83.33 mmol). The reaction mixture was heated at 150° C. for 18 h in which time the solution went from yellow to amber. After cooling to room temperature the solvent was removed on a rotary evaporator. The resulting oil was re-evaporated several times from 50 mL methanol. The resulting oil was triturated with diethyl ether until a solid formed. The solid was collected by filtration and dried under vacuum to yield solid 50% sulfonated poly(p-hydroxystyrene), 32.6 g. Elemental analysis: C, 54.78%; H, 6.75%; N, 5.71%; S, 8.37%. A sample for testing was prepared by adding the above solid (15 g) to deionized water (75 mL) and of 1N NaOH (14 mL). This solution was applied to carpet using Test Method 1. The carpet was evaluated for stain resistance u...
example 2
[0135]Into a 500-mL round-bottom flask was added poly(p-hydroxystyrene-t-butylacrylate) polymer (20 g, 61:39; Dupont Electronic Polymers LLP, Lot No# 10020-51-FDP, see Materials) and DMF (120 mL). To the resulting solution was added SO3.DMF (7.6 g) and the resulting solution heated at 150° C. with stirring for 18 h. The reaction mixture was cooled to room temperature and the solvent removed in vacuo to give a brown oil. The oil was added to diethyl ether (200 mL) and stirred for 30 min.; decanting the diethyl ether and repeating the procedure several times caused the polymer to solidify. The solid was dried under high vacuum to give the product, 50% sulfonated poly(p-hydroxystyrene-acrylic acid) (61:39), 28.17 g. 1H and 13C NMR showed that the t-butyl group had been removed in the course of the sulfonation. Elemental analysis: C, 53.66%; H, 7.08%; N, 6.53%; S, 5.62%. A sample for stain blocker testing was prepared by dissolving the above polymer (15 g) in deionized water (50 mL) and...
example 3
[0136]Into a 500-mL round-bottom flask was added poly(p-hydroxystyrene-t-butylacrylate) polymer (20 g, 61:39; Dupont Electronic Polymers LLP, Lot No. 10020-51-FDP, see Materials) and DMF (120 mL). To the resulting solution was added SO3.DMF (3.8 g) and the resulting solution heated under nitrogen to 150° C. with stirring for 18 h. The reaction mixture was cooled to room temperature and the solvent removed in vacuo to give a brown oil. The oil was added to diethyl ether (150 mL) and stirred for 30 min. Decanting the diethyl ether and repeating the procedure several times caused the polymer to solidify.
[0137]The solid was dried under high vacuum to give the product, 25% sulfonated poly(p-hydroxystyrene acrylic acid) (61:39), 26.48 g. 1H and 13C NMR showed that the t-butyl group had been removed in the course of the sulfonation. Elemental analysis: C, 58.42%; H, 7.47%; N, 6.6%; S, 3.09%. A sample for testing was prepared by dissolving the above polymer (15 g) in deionized water (60 mL)...
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