Flameproofing agents

Details Flameproofing agents Flameproofing agents

1980-01-25

1982-01-19

Lusignan, Michael R.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

106 1817, 106 1819, 252608, 4273933, 564 15, C07C12700, B05D 302, C09D 516, C09D 518

Patent

active

043118550

ABSTRACT:
An improved process for manufacturing tetrakis (hydroxymethyl) phosphonium amide condensation product without the formation of a precipitate. Urea or thiourea is added to the tetrakis (hydroxymethyl) phosphonium salt having an anion formed from a dibasic or tribasic or polybasic acid. The said salt is in aqueous solution. The pH of the aqueous solution of said salt is adjusted to the range of 4-6.5 when the urea or thiourea is added to the salt. The proportion of said salt to said urea or thiourea is 1:0.05-0.5 (molar). The sulphuric acid salt is preferred. The process produces an improved aqueous product substantially free of insolubles.

REFERENCES:
patent: 3755457 (1973-08-01), Carlson
patent: 3775155 (1973-11-01), Eggenweiler et al.
patent: 3878245 (1975-04-01), Nachbar et al.
patent: 3932502 (1976-01-01), Nachbar et al.
patent: 3994971 (1976-11-01), Nachbar et al.
patent: 4110509 (1978-08-01), Roth

Affiliated with

Also associated with

Rating

Flameproofing agents does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flameproofing agents, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flameproofing agents will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1916506