Polyvinyl carbamate

Reaction of polyvinyl alcohol with urea to give polyvinyl carbamates [11,47, 48]. 

In 1950, Dahlquist et al. [82] reported the use of polyvinyl A -alkyl carbamates as PSA release materials. Since then, many other types of alkyl side chain polymers have been patented for use as release coatings, including copolymers based on higher alkyl acrylates or methaci ylates [83-86], polyvinyl esters of higher aliphatic fatty acids [87], higher alkyl vinyl esters or ethers and a maleic... 

Escoat P-20. [Polyad] Polyvinyl octadecyl carbamate ctmqxls. release coats, water repellents. 

Carbamic acid, homopolymer, octadecyl-ethenyl ester. See Polyvinyl octadecyl carbamate... 

Poly (vinyl N-octadecylcarbamate). See Polyvinyl octadecyl carbamate Poly (1-vinyl-2-pyrrolidinone) homopolymer Polyvinylpyrrolidone. See... 

Carbamic acid ethyl ester. See Urethane Carbamic acid, homopolymer, octadecyl-ethenyl ester. See Polyvinyl octadecyl carbamate Carbamic acid, N-hydroxymethyl-n-methyldithio-, potassium salt. See Potassium N-hydroxymethyl-N-methyIdithiocarbamate Carbamic acid, (mercaptoacetyl) methyl-, ethyl ester, S-esterwith 0,0-diethyl phosphorodithioate. See Mecarbam Carbamic acid, methyl-, 2,3-(dimethylmethylenedioxy) phenyl ester. See Bendiocarb... 

STEPAN Cetyl Alcohol STEPAN Cetyl Alcohol NF TEGO Alkanol 16 Ultrapure CA Unihydag Wax 16 36671-85-9 Mayzo RA-75 Mayzo RA-95H Mayzo RA-95HS Mayzo RA-150W Polyvinyl octadecyl carbamate 36701-01-6 Furfuryl valerate 36734-19-7 Iprodione 36788-39-3... 

Polycarboxylates Carboxylate derivatives of poly(vinyl alcohol) are biodegradable and functional in detergents as co-builders, although too costly to be practical replacements for polyacrylic acid at this time. Matsumura et al. polymerized vinyloxyacetic acid [69, 70] and Lever has patented polymers based on vinyl carbamates obtained from the reaction of vinyl chloroformates and amino acids such as aspartic and glutamic acids [71]. Both hydrolyze (Scheme 4), to polyvinyl alcohol, which is biodegradable. 

Release coatings based on long-chain alkyl groups yield medium release forces (0.1 -1 N/cm). They are primarily used for the backsize of tapes. Examples are polyvinyl - stearyl - carbamate, chromium complex of C14-C18 fatty acids [248], and stearyl copolymers [249]. 

Ossipov and Hilborn derivatized one of the very important commercially available water-soluble polymers, namely polyvinyl alcohol (PVA), in order to prepare cross-linked hydrogels using an efficient carbonyldiimidazole (CDI)-mediated coupling, they introduced small amounts (1-5 mol%) of pendant azide and alkyne functionalities independently on to the polymer through a carbamate linkage. Cross-linked hydrogels were then prepared by reacting the PVA-azide and PVA-alkyne in the presence of Cu catalyst (Scheme 7.38) [65]. 

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