Benzocyclobutene novolac resin compositions
AssigneeThe Dow Chemical Company
InventorDaniel M. Scheck
Life of this patent
Estimating the term…
Abstract
A novolac resin is prepared by reacting a phenolic compound, an aldehyde or a ketone, and a hydroxyl-substituted benzocyclobutene compound wherein the hydroxyl group is attached to an aromatic ring. The benzocyclobutenes are connected to the phenolic rings through an oxygen or oxyaryl bridge, or the cyclobutene is fused directly to a phenol ring. The novolac resin cures without evolution of volatiles and, when cured, provides a polymer which has a high glass transition temperature and which is essentially insoluble in organic solvents.
Claims12
A compound represented by the formula ##STR4## wherein:
- R is independently at each occurrence hydrogen, aliphatic hydrocarbyl, aryl, aralkyl, or cycloaliphatic hydrocarbyl;
- R' is independently at each occurrence hydrogen, aliphatic hydrocarbyl, aryl, aralkyl, or cycloaliphatic hydrocarbyl;
- m is 0, 1, 2 or 3;
- p is 0, 1, or 2;
- x is 0.02 to 1.0;
- n is 2 to 100;
- X is a divalent organic or inorganic moiety;
- Z is alkyl, aryl or halogeno;
- and
- Ar is independently at each occurrence a C.sub.6 -C.sub.10 aromatic moiety.
A compound represented by the formula:
- ##STR5## wherein:
- R is independently at each occurrence hydrogen, aliphatic hydrocarbyl, aryl, aralkyl, or cycloaliphatic hydrocarbyl;
- R' is independently at each occurrence hydrogen, aliphatic hydrocarbyl, aryl, aralkyl, or cycloaliphatic hydrocarbyl;
- m is 0, 1, 2 or 3;
- x is 0.02 to 1.0;
- n is 2 to 100;
- and
- Z is alkyl, aryl, or halogeno.
Dependencies are inferred from the claim text.