Polyurethane spectacle frames or single parts thereof and proces

Details Polyurethane spectacle frames or single parts thereof and proces Polyurethane spectacle frames or single parts thereof and proces

1976-12-14

1978-10-17

Cockeram, H.S.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

351 41, 528273, 260864, C08G 1876, C08G 1877, C08G 1842, C08G 1848

Patent

active

041208480

ABSTRACT:
Disclosed are spectacle frames or single parts thereof having a moderate heat distortion temperature, i.e. approximately 60.degree. to approximately 70.degree. C. The spectacle frames or single parts thereof are composed of a cured polyurethane prepared by the reaction of (1) a mixture of two types of diisocyanates represented by the following formulae (A) and (B): ##STR1## where R.sub.1 is an aliphatic hydrocarbon group of 1 to 12 carbon atoms and R.sub.2 and R.sub.3 are hydrogen or an aliphatic hydrocarbon group of 1 to 12 carbon atoms, ##STR2## where X is oxygen or an aliphatic hydrocarbon group having 1 to 5 carbon atoms, with (2) a polyhydroxy compound having a hydroxyl value of at least 150 and an average molecular weight of 300 to 5,000. The ratio in amount of the diisocyanate of type (B) to the total of the two types of diisocyanates (A) and (B) is 0.2-0.7 by mole.

REFERENCES:
patent: 3706710 (1972-12-01), Camilleri et al.
patent: 3790508 (1974-02-01), Triolo
patent: 3839491 (1974-10-01), Gamero et al.
patent: 3925319 (1975-12-01), Hiatt et al.
patent: 3997514 (1976-12-01), Kogon
Japanese Laid-Open Application 89055/1975 (Application 136,081/1973).
Saunders et al.-Polyurethanes-Part I, Interscience, N.Y. 1962, pp. 262-273.

Affiliated with

Also associated with

Rating

Polyurethane spectacle frames or single parts thereof and proces does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyurethane spectacle frames or single parts thereof and proces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyurethane spectacle frames or single parts thereof and proces will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-374912