Reference

Copolymers containing isocyanate groups

Copolymers containing isocyanate groups. Gimpel, Juergen; Schwendemann, Volker; Henne, Andreas; Schenk, Hans Uwe; Spoor, Herbert; Sander, Hans (BASF A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3245297 A1 14 Jun 1984, 12 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C08F220-18; C08F226-00. APPLICATION: DE 82-3245297 8 Dec 1982. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Copolymers (mol. wt. 500-10,000) contg. NCO groups are prepd. by photopolymg. 5-60% 1-alkenyl isocyanate and 40-95% C1-20 hydrocarbyl (meth)acrylate(s) and olefin(s) (￡50% of ester amt.) contg. no acidic OH, CH, NH, or SH groups. The copolymers are useful in the prepn. of polyurethane coatings with good mech. properties. Thus, CH2:CH2NCO 12, Bu acrylate 108, EtOAc 460.4, Me3CCl 19.6, and (2,4,6-trimethylbenzoyl)diphenylphosphine oxide (I) [75980-60-8] 6 parts were irradiated under N at 20° with a 125-W Hg high pressure lamp. After 1 h, an addnl. 1.2 parts I was added; irradn. was continued for another 6 h with 4 addns. of 1.2 parts I each to give a polymer [92625-67-7] (20.4% solids) soln., which was distd. to 60% solids. The polymer had NCO value 3.8% and K-value 16.5.

Photopolymerizable compositions and their use

Photopolymerizable compositions and their use. Henne, Andreas; Schornick, Gunnar (BASF A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3236026 A1 29 Mar 1984, 15 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C08F002-50; C09D003-727; C09D011-10; G03C001-68; G03F007-26; C08J003-28; C08L067-06; C08L063-10. APPLICATION: DE 82-3236026 29 Sep 1982. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 42, 74 Photopolymerizable compns. comprise [A] olefinic unsatd. compds., [B] a photoinitiator of type RR'P(X)nCOR2 (R = aliph. or arom. hydrocarbyl or hydrocarbyloxy; R' = R, NR3R4; R2 = tertiary alkyl or cycloalkyl, heterocyclic ring, or substituted heterocyclic ring; R3, R4 = H, linear or branched C￡18 alkyl, cyclohexyl, cyclopentyl, C2-4 hydroxyalkyl, or Ph; X = O, S; n = 0, 1), [C] Na, K, or Li salt of an org. acid, and [D] a solvent for C. The compns. are useful for coatings, printing plates, and UV-curable printing inks. Thus, 65 parts bisphenol A diglycidyl ether diacrylate and 3 parts 1,6-hexanediol diacrylate were mixed with 3 parts (2,4,6-trimethylbenzoyl)diphenylphosphine oxide [75980-60-8] and 5 parts 20% aq. soln. of Li octylsulfonate [29726-45-2] and coated 80 m-thick on a glass plate. The compn. was photocured using a Hg lamp to a scratch-resistant coating with max. curing speed 150 m/min.