Process for producing moulded expanded urea formaldehyde product

Details Process for producing moulded expanded urea formaldehyde product Process for producing moulded expanded urea formaldehyde product

1974-07-30

1977-05-31

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

260 25F, 264 464, 264 53, 264DIG2, B29D 2704

Patent

active

040269809

ABSTRACT:
Expanded urea formaldehyde products are moulded from urea formaldehyde resin solution, a catalyst such as formic acid and, optionally, a foaming agent, casting the mixture in an open-topped mould, partially drying and curing the resulting gel at 20.degree. C to 70.degree. C to produce a preform, and subsequently heat-treating the preform above 120.degree. C in a restraining mould and allowing it to expand therein.

REFERENCES:
patent: 2789095 (1957-04-01), Lindvig
patent: 3256067 (1966-06-01), Shriver et al.
patent: 3284379 (1966-11-01), Brasco et al.
patent: 3377139 (1968-04-01), MacGregor et al.
patent: 3535273 (1970-10-01), Bauer
patent: 3740355 (1973-06-01), Klug

Affiliated with

Also associated with

Rating

Process for producing moulded expanded urea formaldehyde product 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 producing moulded expanded urea formaldehyde product, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing moulded expanded urea formaldehyde product will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-658329