Polyamide blend compositions
A composition comprising composition comprising a polymer blend of a polyamide resin and block copolyestercarbonates resin comprising organic carbonate blocks alternating with arylate blocks, said arylate blocks comprising arylate structural units derived from a 1,3-dihydroxybenzene and at least one aromatic dicarboxylic acid and having a degree of polymerization of at least about 4. The composition preferable has favorable properties of clarity and chemical resistance.
1 . A composition comprising a polymer blend of a polyamide resin and a block copolyestercarbonate resin comprising organic carbonate blocks alternating with arylate blocks, said arylate blocks comprising arylate structural units derived from a 1,3-dihydroxybenzene and at least one aromatic dicarboxylic acid and having a degree of polymerization of at least about 4.
2 . The composition of claim 1 wherein the polyamide resin comprises an amorphous polyamide resin.
3 . The composition of claim 1 wherein the polyamide resin is immiscible with said block copolyestercarbonates resin.
4 . The composition of claim 1 wherein the polymer blend has a percent transmittance, as measured by ASTM D1003, of greater than or equal to about 50%.
5 . The composition of claim 1 wherein the polymer blend has a percent transmittance, as measured by ASTM D1003, of greater than or equal to about 75%.
6 . The composition of claim 1 wherein the polymer blend polymer of a polyamide resin and block copolyestercarbonate resin comprises from 1 to about 99 percent by weight polyamide resin and from about 1 to about 99 percent by weight block copolyestercarbonates resin.
7 . The composition of claim 1 wherein the polymer blend of a polyamide resin and block copolyestercarbonate resin comprises from 75 to about 90 percent by weight polyamide resin and from about 25 to about 10 percent by weight block copolyestercarbonate resin.
8 . The composition of claim 1 wherein the polymer blend polymer blend of a polyamide resin and block copolyestercarbonate resin comprises from 10 to about 90 percent by weight polyamide resin and from about 10 to about 90 percent by weight block copolyestercarbonates resin.
9 . The composition of claim 1 wherein polyestercarbonate resin is a the resorcinol based copolymer containing carbonate linkages having the structure:
wherein Rn is at least one of C1-12 alkyl, C6-C24 aryl, alkyl aryl or halogen, n is 0-3. R5 is at least one divalent organic radical, m is about 4-150 and p is about 2-200.
10 . The composition of claim 9 wherein R5 is derived from a bisphenol compound.
11 . The composition of claim 1 wherein the polyamide resin comprises aliphatic, aromatic or a combination of aliphatic and aromatic polyamides.
12 . The composition of claim 1 wherein the polyamide resin is optically transparent.
13 . The composition of claim 1 wherein the polyamide resin comprises a blend of polyamide resins.
14 . The composition of claim 1 additionally comprises 0-50% polycarbonate resin.
15 . The composition of claim 1 additionally comprises 0-50% of a polyester resin.
16 . The composition of claim 15 wherein the polyester is selected from polyesters made of fragments from at least one diol and at least one dicarboxylic acid.
17 . The composition of claim 1 comprising a reactive compatibilizer.
18 . The composition of claim 17 comprising a reactive ionomeric, epoxy, or oxaoline compatibilizer.
19 . The composition of claim 18 comprising a reactive ionomeric polymeric sulfonate compatibilizer.
20 . The composition of claim 18 comprising a reactive epoxy compatibilizer.
21 . The composition of claim 18 comprising a reactive oxaoline compatibilizer comprising a pendant cyclic iminoether cyclic.
22 . The composition of claim 1 including additional ingredients comprising suitable dyes, pigments, special color effects additives, mold release agents, antioxidants, lubricants, nucleating agents, stabilizers, reinforcing fillers, flame retardants, impact modifiers, flow aids or mold release agents,
23 . A formed article comprising the composition of claim 1 wherein the polymer blend of a polyamide resin and block copolyestercarbonates resin comprises from 10 to about 90 percent by weight polyamide resin and from about 10 to about 90 percent by weight block copolyestercarbonates resin.
24 . A formed article according to claim 23 comprising a film or sheet.
25 . A formed article according to claim 23 having enhanced chemical resistance.
26 . A formed article according to claim 23 having transparent properties wherein said polyamide and said copolyestercarbonate resin have substantially matching indexes of refraction.
27 . A formed article according to claim 23 having transparent properties wherein said polycarbonate resin, is present in an amount for adjusting the index of refraction of the miscible blend for enhancing transparency.