Thermoplastic additives for molding compounds
AssigneeOwens-Corning Fiberglas Corporation
InventorsCarl R. Strauss, Michael G. Roberts, Charles E. Bolen
Life of this patent
Estimating the term…
Abstract
Thermoplastic additives comprising the esterification product of a mixture of glycols and oligomers with dimer and trimer acids are blended with thermosetting resins to reduce the shrinkage of the latter on molding.
Claims12
A moldable composition comprising a thermosetting polyester resin and a thermoplastic resin, said thermoplastic resin being the reaction product of a mixture of glycols and oligomers with dimer or trimer acids, said dimer acid being an aliphatic, dibasic, long chain acid having at least 36 carbon atoms in said chain and having two alkyl side chains and having at least one ethylenic bond, said trimer acid being an aliphatic, tribasic, long chain acid having at least 54 carbon atoms in said chain and having at least three alkyl side chains and at least one ethylenic bond, said oligomers having the general formula:
- ##STR3## wherein m is, generally, greater than n and wherein the sum of m plus n is within the range of from 2 to 4.
A method of improving the molding characteristics of a molding compound comprising a thermosetting polyester which comprises incorporating in said molding compound a thermoplastic resin comprising the reaction product of a mixture of glycols and oligomers with dimer or trimer acids, said dimer acid being an aliphatic, dibasic, long chain acid having at least 36 carbon atoms in said chain and having two alkyl side chains and having at least one ethylenic bond, said trimer acid being an aliphatic, tribasic, long chain acid having at least 54 carbon atoms in said chain and having at least three alkyl side chains and at least one ethylenic bond, said oligomers having the general formula:
- ##STR4## wherein m is, generally, greater than n and wherein the sum of m plus n is within the range of from 2 to 4.
Dependencies are inferred from the claim text.