| 摘要 |
<p>The graft copolymers, (C), are prepd. by a free radical-initiated graft copolymerisation process in organic soln. A reaction batch is prepd. contg., by wt., (A) 30-80% liq. epoxide cpds. contg. >1 epoxide gp. in molecule, having viscosity 15-14000 cP, measured at 25 degrees C, and epoxide equiv. wt. 120-450, dissolved in inert solvents having b. pts. 60-150 degrees C, and (B) 70-20% mixt. consisting, by wt., of (a) 2-10% 3-5C ethylenically unsatd. acid and/or unsatd. acid anhydride, (b) 70-90% acrylic acid ester of aliphatic satd. 1-18C monohydric alcohols and (c) 10-30% methacrylic acid ester of aliphatic satd. 1-18C monohydric alcohols. Components (a), (b) and (c) add up to 100%. Components (A) and (B) also add up to 100%. Reaction batch is kept at 60-150 degrees C until graft copolymerisation is completed. Solvent is opt. distilled off below 130 degrees C under reduced press. (C) is used for preparing hardenable, solvent-free or low solvent-contg. coating- and/or moulding compsns. is claimed. (C) can also be used as casting resins in electrical industry, esp. for embedding temp.-sensitive switch units. It may be used as sealing compsns. and in prepn. of adhesives. Hardened prods. have high impact strength.</p> |
