Method for production of new thermal and chemical resistant poly

Details Method for production of new thermal and chemical resistant poly Method for production of new thermal and chemical resistant poly

1976-10-19

1979-07-31

Cockeram, H. S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

528 79, 260 18PT, 521177, 428425, C08G 1814, C08G 1848, C08G 1832

Patent

active

041630874

ABSTRACT:
Method for production of new, thermal and chemical resistant polyurethane plastics, particularly in the form of foams, these foams being obtained from the reaction of di- or poly- isocyanates with polyols, said polyols having the formula 1 or 2 as herein described, Ar in the said formulas representing a benzene, naphthalene or anthracene ring, which may be singly or multiply substituted with a halogen atom, alkyl radical, aryl radical or allyl radical, Z representing the oxygen atom, a group SO.sub.2 or a divalent radical --CRR.sub.1 -- where R and R.sub.1 represent a hydrogen atom or an alkyl radical, m and r represent 0 or 1, and n and p represent an integer 1-10, or their mixtures with other low-viscosity polyols or with a compound having formula 3 as herein described in which R.sub.2 represents a simple or branched alkyl or aryl radical which can be substituted by a lower alkyl or aryl radical or by halogen atoms added in a quantity of 0.1-50 parts by weight, these being reacted with isocyanates or in the presence of catalysts, foaming agents and solvents.

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