Thermoplastic expandable microsphere process and product

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

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Details

260 285R, 260893, 260899, 260897R, 521 56, 521 55, B01F 1500

Patent

active

041088069

ABSTRACT:
Expandable synthetic resinous microspheres are expanded in a matrix by heating under pressure to at least a foaming temperature and permitting the microspheres to expand at a lower pressure.

REFERENCES:
patent: 3219600 (1965-11-01), Rucker
patent: 3353981 (1967-11-01), Jacob
patent: 3466353 (1969-09-01), Turner
patent: 3515569 (1970-06-01), Walters et al.
patent: 3615569 (1970-06-01), Morehouse, Jr. et al.
patent: 3673126 (1972-06-01), Carmody et al.

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