The present technology relates to polyvinyl chloride plastisol compositions, such as sealant disposition.
In the production of cars, the automobile person is initially primed with a layer composition to prevent corrosion in the metal. This can be done in various ways although generally it is performed by cationic electrodeposition making use of the auto body as the cathode. Once the automobile physique has been primed in this manner, future steps in mount are performed. These steps typically include the usage of sealants in the primed automobile body. The sealants will be subsequently topcoated along with the rest of the human body during the last stages with the painting process.
Polyvinyl chloride plastisols give several advantages for use because sealant arrangement: a good harmony of strength, elongation and toughness, little to no volatile organic component and low cost. However , despite these types of advantageous houses, when used in conjunction with cationically electrodepositable primer disposition in automobile applications, aprobacion is poor and yellowing of the coating composition outcomes.
Historically, polyaminoamides which are fine art recognized adhesion promoters, have been utilized in an attempt to deal with these adhesion concerns. These, nevertheless , can adversely affect the stableness of the plastisol based sealant composition, solution of the coating and in addition, cause more yellowing.
There is a will need, therefore , to get a polyvinyl chloride plastisol primarily based composition which usually exhibits superb adhesion to primed metallic and is in a position of being topcoated with a selection of coating arrangement without yellowing of the coating.
SUMMARY IN THE INVENTION
Relative to the present technology, there is offered a plastisol based formula comprising:
(a) a copolymer of an aliphatic olefinically unsaturated material and an anhydride containing materials; and
(b) a polyvinyl chloride plastisol.
IN DEPTH DESCRIPTION IN THE...