Coating processes – Coating remains adhesive or is intended to be made adhesive
Patent
1974-02-19
1976-02-24
Pianalto, Bernard D.
Coating processes
Coating remains adhesive or is intended to be made adhesive
427385, 427391, C09J 704
Patent
active
039405133
ABSTRACT:
In U.S. Pat. Nos. 3,437,622 and 3,761,307 and U.S. Pat. application Ser. No. 323,944, filed January 15, 1973 and now abandoned, are disclosed pressure-sensitive adhesives, the required cohesive strength of which is provided by a polyurethane polymer in place of the natural or synthetic rubber of the prior art. However, some of such polyurethane-based adhesives are not highly resistant to moisture unless special procedures are used. For example, they may lose 20 to 75% of their adhesiveness after exposure for 3 days or less to 90% relative humidity at 150.degree.F. This invention discloses means of overcoming this problem by combinations of excluding moisture, adding minor proportions of the reaction-products of hydroxylated elastomers or of hexamethylene tetramine.
REFERENCES:
patent: 3437622 (1969-04-01), Dahl
patent: 3625752 (1971-12-01), Korpman
patent: 3743616 (1973-07-01), Kest
patent: 3743617 (1973-07-01), Kest
patent: 3756848 (1973-09-01), Dahl
patent: 3761307 (1973-09-01), Dahl
patent: 3769071 (1973-10-01), Trancik
patent: 3778302 (1973-12-01), Dahl
patent: 3796678 (1974-03-01), Bartizal
patent: 3802988 (1974-04-01), Dahl
patent: 3821056 (1974-06-01), Reardon
Anchor Continental Inc.
Pianalto Bernard D.
LandOfFree
Method of making moisture-resistant polyurethane-based pressure- does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of making moisture-resistant polyurethane-based pressure-, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making moisture-resistant polyurethane-based pressure- will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2080125