C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
402/252
C08K 5/13 (2006.01) C08G 8/08 (2006.01) C08G 59/02 (2006.01) C08G 65/38 (2006.01) C08K 5/15 (2006.01) C09D 161/04 (2006.01)
Patent
CA 2012780
- 1 - HOE 89/F 093 Abstract Binders, their preparation and use in curable mixtures The invention relates to a binder (A) which contains hydroxyl groups and carboxyl groups, the latter option- ally in neutralized form, wherein the binder (A) is essentially composed of a mixture of polyalkylidenepoly- phenols (B) having average degrees of condensation of 2.3 to 8.0 and average molecular weights Mn of 250 to 1,000, these polyalkylidenepolyphenols (B) containing phenolic OH groups and carboxyl groups, and polyaddition products (C) containing structural units (d) which are derived from epoxide compounds (D) which on average contain at least two (1,2-)epoxide groups per molecule; the structural units (d) having an average molecular weight Mn of 600 to 10,000, and containing structural units (b) which are derived from the poly- alkylidenephenols (B), and these polyaddition products (C) have average molecular weights Mn of at least 1,100. Coating preparations which contain this binder (A) are suitable in particular for the internal coating of containers for the food industry, this coating having, in particular, very low release of harmful substances and good resistance to sterilization temperatures.
Graff Hans Albrecht
Has Adam
Hesse Wolfgang
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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