Process for the production of thermally color stable aliphatic a

Details Process for the production of thermally color stable aliphatic a Process for the production of thermally color stable aliphatic a

1985-10-29

1987-06-30

Siegel, Alan

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

Organic compounds

Carboxylic acid esters

560158, 560159, 560332, 528 45, C07C12506, C07C 7100, C08G 1881

Patent

active

046772219

ABSTRACT:
The present invention relates to a process for the production of aliphatic and/or cycloaliphatic diisocyanates which are color stable to heat, which is characterized in that a diisocyanate with aliphatically-and/or cycloaliphatically-bound isocyanate groups is heated in the presence of about 0.1 to 3% by weight, based on the diisocyanate, of at least one compound which is soluble in the diisocyanate and contains at least 3% by weight of structural units corresponding to the formula: ##STR1## for up to about 5 hours at a temperature of about 100.degree. to 220.degree. C. and the diisocyanate which has been treated in this way is subsequently purified by distillation.
The present invention also relates to the use of the products of the present process for the production of modified polyisocyanates having improved coloration.

REFERENCES:
patent: 2885424 (1959-05-01), Spiegler
patent: 3183112 (1965-05-01), Gemassmer et al.
patent: 3799963 (1974-03-01), Adams
patent: 3873589 (1975-03-01), Coury et al.
patent: 3903127 (1975-09-01), Wagner et al.
patent: 4065362 (1977-12-01), Kayaoka et al.
patent: 4386032 (1983-05-01), Hughes et al.
patent: 4388245 (1983-06-01), Ueyanagi et al.

Affiliated with

Also associated with

Rating

Process for the production of thermally color stable aliphatic a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the production of thermally color stable aliphatic a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of thermally color stable aliphatic a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-448740