Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1998-07-23
2000-03-07
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C08G 6308
Patent
active
060342056
ABSTRACT:
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 T.sub.m in the range of from 48 to 58.degree. C. and a crystallisation temperature T.sub.c in the range of from 16 to 30.degree. 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.degree. C. They are often coloured and can be employed in kits.
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patent: 5225521 (1993-07-01), Spinu
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patent: 5639851 (1997-06-01), Bezwada
patent: 5688900 (1997-11-01), Cooper
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"Ingenierie Moleculaire de Materiaux Biocompatibles et Biodegradables par Ouverture de Cycle de Lactones et Lactides" [translation:Molecular Study of Biocompatible and Biodegradable Material by Opening of the Lactone and Lactide Rings], Dissertation by Philippe DuBois, University de Liege, 1990-1991.
Dutton Amanda J.
Wasson Robert C.
Michl Paul R.
Solvay ( Societe Anonyme)
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