Non-corrosive elastomeric foam for insulating copper tubes

Details Non-corrosive elastomeric foam for insulating copper tubes Non-corrosive elastomeric foam for insulating copper tubes

1991-10-23

1993-02-16

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

428 369, 521 85, 521 92, 521 94, 521 98, 521139, 521140, C08J 900, C08J 930

Patent

active

051872030

ABSTRACT:
A composition and foam insulation for copper tubing is described herein which is formulated to retard copper oxidation and eliminate or reduce stress corrosion in the copper tubing. The copper compatible, elastomeric foam insulation is made from a composition comprising 100 parts by weight of rubber, vinyl chloride polymer at about 15 to about 85 pphr, a plasticizer selected from the group consisting of an alkyl phosphate ester and an oxyalkyl phosphate ester at about 10 to about 100 pphr, a fire retardant in an amount of at least about 100 pphr, a stabilizer in an amount effective to prevent degradation of the rubber and vinyl chloride polymer, a preservative at from about 0.1 to about 10 pphr, and a lubricant at about 10 to about 85 pphr, wherein the composition and foamed product contains no more than about 5 parts of free phenol per million.

REFERENCES:
patent: 2811493 (1957-10-01), Simon et al.
patent: 3695477 (1972-10-01), Edmonston et al.
patent: 4245055 (1981-01-01), Smith
patent: 4454250 (1984-06-01), Florence et al.

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