Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1979-11-26
1981-04-07
Nielsen, Earl A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
2603452, 2603459R, 525332, 525387, 528417, C08G 6108, C08G 5914
Patent
active
042607027
ABSTRACT:
Polymers that have a number average molecular weight of at least 1000 and that contains at least 5% by weight of segments that contain at least two consecutively recurring cyclic ether units wherein at least one of said tetrahydropyran 2,6-diyl unit of the formula ##STR1## and wherein the remainder of said cyclic ether units are selected from said tetrahydropyran 2,6-diyl units and tetrahydrofuran 2,5-diyl units of the formula ##STR2## wherein R.sup.1, R.sup.8, R.sup.9, R.sup.10, R.sup.11, R.sup.12, R.sup.13 and R.sup.14 are each selected from hydrogen and lower alkyl groups;
REFERENCES:
patent: 3436377 (1969-04-01), Dittmann et al.
patent: 3884893 (1975-05-01), Kolb
patent: 4051199 (1977-09-01), Udipi et al.
Schultz William J.
Smith Samuel
Alexander Cruzan
Lilly James V.
Minnesota Mining and Manufacturing Company
Nielsen Earl A.
Sell Donald M.
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