C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/4503, 400/57
C08L 67/06 (2006.01) B29C 37/00 (2006.01) B29C 41/00 (2006.01) C09D 167/06 (2006.01)
Patent
CA 1226987
ABSTRACT Powdered coating compositions composed of a bonding agent of unsaturated polyester resin and hardening catalyst and bonding agent. The composition, prior to the addition of any catalyst, is a mixture of (I) about 85 to 100 weight percent of a mixture of polyester resins, which itself comprises about 70 to about 98 weight percent of a first polyester resin composed of at least one unsaturated polyester resin, the first resin: (i) having a melting point of at least 70 °C as measured with the ring-and-ball method, (ii) occurring as a free-flowing powder at temperatures of up to 25 °C, (iii) having a degree of unsaturation of at least 15 calculated as weight percent maleic anhydride to the total polyester, and (iv) yielding a product having an elongation at break of at most 10 % upon curing with styrene; (b) about 2 to about 30 weight percent of a second poly- ester resin composed primarily of at least one unsaturated polyester resin, the second resin yielding a product having an elongation at break of at least 50 % upon curing with styrene and the amount and the melting point of the second resin being such that a mixture of the first and the second resin has a melting point by the ring-and-ball method of at least 40 °C; and (II) about 0 to about 15 weight percent relative to the first and second resins of one or more copolymerizable monomers and/or prepolymers having a boiling point of at least 200 °C. Such compositions are very suitable for preparing a top coat using the in-mold coating technique.
431589
Evers Johannes T.m.
Verwer Andreas N.j.
Dsm Resins B.v.
Fetherstonhaugh & Co.
LandOfFree
Coating powder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coating powder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coating powder will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1204045