Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1978-03-03
1979-12-25
Briggs, Sr., Wilbert J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
424 19, 424 20, 528219, 528249, 528392, 528405, 528425, C08G 6528, C08G 6534
Patent
active
041806468
ABSTRACT:
The invention concerns orthoester and orthocarbonate polymers having a repeating mer comprising a hydrocarbon radical and a symmetrical dioxycarbon unit of the general formula: ##STR1## wherein R.sub.1 is a multivalent hydrocarbon radical, R.sub.2 and R.sub.3 are hydrocarbon radicals with at least one of R.sub.2 or R.sub.3 bonded to the dioxycarbon through an oxygen linkage, and which polymers are synthesized by reacting a polyol with an orthoester or orthocarbonate. The polymers are useful for making articles of manufacture, including devices and coatings for delivering beneficial agents.
REFERENCES:
Mohrotra et al., Indian Journal Applied Chemistry, vol. 28-No. 2, (1965) Reactions of Ethyl Orthoformate with Glycols, pp. 53-58.
Crank, Aust. Journal Chemistry, "Derivatives of Orthoacids", vol. 17, (1964), pp. 1392-1398.
DeWolfe, Carboxylic Ortho Acid Derivatives, (1970) Academic Press Inc., New York, pp. 7-9 & 21-22.
Bailey, et al., Polymer Preprint. American Soc. Division Polymer Chem., vol. 13, No. 1, (1972), "The Polymerization of a Spiroortho Ester", pp. 281-286.
Choi Nam S.
Heller Jorge
ALZA Corporation
Briggs Sr. Wilbert J.
Ciotti Thomas E.
Mandell Edward L.
Sabatine Paul L.
LandOfFree
Novel orthoester polymers and orthocarbonate polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Novel orthoester polymers and orthocarbonate polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Novel orthoester polymers and orthocarbonate polymers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2071248