Thermoplastic syntactic foams and their preparation

Details Thermoplastic syntactic foams and their preparation Thermoplastic syntactic foams and their preparation

1996-03-20

1997-11-25

Cooney, Jr., John M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

523218, 523219, 521 55, 521134, 521135, 521138, 4283044, 4283133, 4283139, 4283142, 4283144, 4283155, 4284735, C08J 932

Patent

active

056913907

ABSTRACT:
A low-density, porous material is prepared by mixing together microballoons and an oligomeric precursor to a polyesterimide polymer. The oligomeric precursor has an initial viscosity sufficiently low that it can flow and wet the microballoons when first heated to a polymerization processing temperature, and thereafter polymerize. Fibers may be controllably incorporated into the material during processing to impart specific properties, and air may be controllably incorporated into the material during processing to further decrease its density.

REFERENCES:
patent: 4595623 (1986-06-01), Du Pont et al.
patent: 4865784 (1989-09-01), Hill
patent: 5032627 (1991-07-01), Wilson et al.
patent: 5120769 (1992-06-01), Dyksterhouse et al.
patent: 5356958 (1994-10-01), Matthews
patent: 5532295 (1996-07-01), Harrison et al.

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