Method for making solid, ungelled aminoplast crosslinkers

Details Method for making solid, ungelled aminoplast crosslinkers Method for making solid, ungelled aminoplast crosslinkers

2007-01-16

2007-01-16

Kiliman, Leszek B. (Department: 1773)

Stock material or miscellaneous articles

Composite

Of polyamidoester

C428S403000, C428S404000, C428S405000, C428S406000, C428S407000, C528S406000, C525S329900, C544S088000

Reexamination Certificate

active

10434682

ABSTRACT:
Methods for preparing crosslinking agents that are the ungelled reaction product of (a) at least one aminoplast resin and (b) at least one modifying compound, wherein the crosslinking agents are essentially free of active hydrogen functional groups and have a glass transition temperature of at least 10° C. are disclosed. The methods include, inter alia, the use of vacuum and/or increased rates of inert gas introduction during reaction.

REFERENCES:
patent: 6316109 (2001-11-01), Ambrose et al.
patent: 6441103 (2002-08-01), Ambrose et al.
patent: 6451928 (2002-09-01), Ambrose et al.
patent: WO 03/011934 (2003-02-01), None
patent: WO 03/011936 (2003-02-01), None

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