Insulation product in particular thermal containing a binder...

Details Insulation product in particular thermal containing a binder... Insulation product in particular thermal containing a binder...

2005-05-17

2005-05-17

Koslow, C. Melissa (Department: 1755)

Compositions

Heat or sound insulating

C427S389800, C428S376000, C524S841000, C442S180000, C442S331000

Reexamination Certificate

active

06893579

ABSTRACT:
Insulating product based on mineral wool sized with a binder based on a phenol-formaldehyde resin, in which the binder comprises, as a mixture:60 to 90 parts by weight of a phenol-formaldehyde resol having a free formaldehyde content of less than or equal to 25% by weight with respect to the dry weight of resin and a free phenol content of less than or equal to 2.5% by weight with respect to the dry weight of resin, obtained by condensation in basic medium of phenol (P) and formaldehyde (F) in an F/P molar ratio of around 2.5 to 4 until the condensation product neutralized by sulphuric acid has a water dilutability of greater than 500% and less than or equal to 1500%;10 to 40 parts by weight of urea.Use of such a sizing composition for manufacturing insulating products, while reducing the emissions of ammonia gas on the manufacturing line.

REFERENCES:
patent: 3684467 (1972-08-01), Smucker et al.
patent: 3932334 (1976-01-01), Deuzeman et al.
patent: 5358748 (1994-10-01), Dornfield et al.
patent: 6132549 (2000-10-01), Nieckarz et al.
patent: 6342271 (2002-01-01), Lericque et al.
patent: 0 148 050 (1985-07-01), None
patent: 905 393 (1962-09-01), None
patent: WO 9903906 (1999-01-01), None

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