Copolymers of vinyl chloride, allyl glycidyl ether, and...

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 214/06 (2006.01) B32B 15/08 (2006.01) B32B 17/10 (2006.01) B32B 27/10 (2006.01) C08F 2/18 (2006.01)

Patent

CA 2227767

An improved method is provided for copolymerizing vinyl chloride with allyl glycidyl ether and a vinyl ester. The copolymers so formed include 70-99 weight % of vinyl chloride, 0.05-15 weight % of allyl glycidyl ether, and 0.05- 15 weight % of a vinyl ester, preferably vinyl acetate. The copolymers of this invention can be compounded to provide films exhibiting improved heat stability, low haze, and good adhesion to solid surfaces such as glass and metal. The compounded resins thus obtained may be especially advantageously used in forming the interlayer of laminated safety glazings, such as vehicle windshields and architectural glazings.

L'invention concerne un procédé amélioré de copolymérisation du chlorure de vinyle avec l'éther allylglycidique et un ester vinylique. Les copolymères ainsi formés contiennent 70-99 % en poids de chlorure de vinyle, 0,05-15 % en poids d'éther allylglycidique et 0,05-15 % en poids d'un ester vinylique, de préférence l'acétate de vinyle. Les copolymères de l'invention peuvent être utilisés pour réaliser des mélanges pour la fabrication de films présentant une stabilité améliorée à chaud, une bonne transparence et une bonne adhésion à des surfaces solides telles que le verre et les métaux. Les mélanges résineux en question sont particulièrement utiles pour constituer la couche interne de vitrages de sécurité feuilletés, tels que les pare-brise des véhicules et les vitrages d'immeubles.

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