Sintered porous plastic liquid barrier media and applications thereof
First Claim
1. A porous self-sealing composition comprising a sintered porous matrix of particles of an absorbent material and particles of a thermoplastic, wherein the absorbent material comprises polyacrylic acid, and the polyacrylic acid is linear polyacrylic acid with a molecular weight greater than 100 KDa or cross-linked polyacrylic acid with a linear backbone molecular weight between adjacent crosslinks (Mc) greater than 10 KDa.
6 Assignments
0 Petitions
Accused Products
Abstract
This application discloses porous self-sealing media comprising a sintered mixture of an absorbent material and a thermoplastic. The self-sealing media block passage of organic solvents or organic solvents in aqueous mixtures, wherein the organic solvents are at concentrations greater than about 40%. The self-sealing media also block acidic solutions. The self-sealing media are useful in a variety of applications such as a pipette tip filter, in line filter, vent, non-mechanical check valve, safety valve, and suction canister.
84 Citations
17 Claims
- 1. A porous self-sealing composition comprising a sintered porous matrix of particles of an absorbent material and particles of a thermoplastic, wherein the absorbent material comprises polyacrylic acid, and the polyacrylic acid is linear polyacrylic acid with a molecular weight greater than 100 KDa or cross-linked polyacrylic acid with a linear backbone molecular weight between adjacent crosslinks (Mc) greater than 10 KDa.
Specification