Composition and process for the production of a porous layer using the composition
View Patent ↗Production of a porous layer includes using a composition which includes a first polymer component and a second polymer component, the first polymer component being polyhydroxyamide and/or polybenzoxazole and stable at a temperature at which the second polymer component decomposes and volatilizes. If the composition is heated to the decomposition temperature of the second polymer component, the second component volatilizes and a porous layer that contains the first component remains.
1. A composition for the production of a dielectric, porous layer, comprising:
a mixture of at least one first polymer component and at least one second polymer component;
said first component selected from the group consisting of polyhydroxyamide and polybenzoxazole; and
said second component being decomposable and volatilizable at temperatures at which said first component is stable;
said first component including a terminal COOH group and said second component including a terminal NH 2 group.
2. The composition according to claim 1 , wherein said second component is a polymer selected from the group consisting of polycarbonate, polyacetal, aliphatic polyether, and polyester.
3. The composition according to claim 2 , wherein said second component is poly( propylene glycol)-bis-(2-amino-propyl ether).
4. The composition according to claim 1 , wherein said second component is a polyether having terminal amino groups.
5. The composition according to claim 1 , wherein said first component is a polyhydroxyamide having terminal carboxyl groups.
6. The composition according to claim 1 , wherein said second component is poly(propylene glycol)-bis-(2-amino-propyl ether).
7. The composition according to claim 1 , wherein said first component is a polyhydroxyamide prepared from bisaminophenol 1 and isophthaloyl chloride.
8. The composition of claim 1 , wherein a salt is formed by the COOH group of a polymer component containing a COON group and the NH 2 group of a polymer component containing a NH 2 group.
9. A composition for the production of a dielectric, porous layer, comprising:
a mixture of at least one first polymer component and at least one second polymer component;
said first component selected from the group consisting of polyhydroxyamide and polybenzoxazole; and
said second component being decomposable and volatilizable at temperatures at which said first component is stable;
one of said components including a terminal COON group and the other of said components including a terminal NH 2 group.
10. The composition of claim 9 , wherein a salt is formed by the COOH group of a polymer component containing a COOH group and the NH 2 group of a polymer component containing a NH 2 group.