| 摘要 |
<p>Products intended for use as hand mouldable materials should meet the objectives of not causing pain to the user when held in the hand, and retaining malleability for a sufficient but not excessive length of time. The invention hand-mouldable compositions comprise selected copolymers of lactones and lactides which manifest a melt temperature Tm in the range of from 48 to 58 DEG C and a crystallisation temperature Tc in the range of from 16 to 30 DEG C. They are preferably produced from epsilon caprolactone and L-lactide, most desirably in a weight ratio of from 94:6 to 91:9, and especially at a reaction temperature in the range of from 150 to 190 DEG C. They are often coloured and can be employed in kits.</p> |
