Appeal No. 1999-0918
Application No. 08/399,690
Appendix A
1. A coextrusion binder composition comprising:
--at least one polymer (A) selected from the group consisting of A1, A2, A3, and
A4, wherein the A1, A2, A3, and A4 groups are defined as follows:
(A1) graft polymers resulting from the grafting of at least one grafting monomer
selected from the group consisting of carboxylic acids containing ethylenic
unsaturation and the corresponding ethylenically unsaturated carboxylic acid
anhydrides onto
(a) impact or crystal styrene homopolymers or copolymers; and
(b) styrene - diene elastomer block polymers or styrene-diene elastomer block
polymers in the hydrogenated state, provided that (b) in not the only polymer in the
mixture of (A) and optionally (B);
(A2) at least one copolymer selected from the group consisting of styrene - diene
elastomer block polymers and styrene - diene block polymers in the hydrogenated
state mixed with at least one polymer (B1) as defined below;
(A3) graft polymers resulting from the cografting of at least one grafting monomer
selected from the group consisting of carboxylic acids containing ethylenic
unsaturation and the corresponding ethylenically unsaturated carboxylic acid
anhydrides onto a mixture:
-of at least one polymer selected from the group of impact or crystal styrene
homopolymers and copolymers; and
-of at least one polymer selected from the group (c) consisting of ethylene - vinyl
acetate copolymers, ethylene - alkyl (meth)acrylate copolymers, ethylene
homopolymers and ethylene - "-olefin copolymers, provided that the ethylene - alky
(meth)acrylate copolymers may not represent more than 40% by weight of the
mixture subjected to the cografting in the case of a polystyrene content lower than
30% by weight if
(A3) represents the major constituent of the binder composition;
(A4) graft polymers resulting from the cografting of at least one grafting monomer
selected from the group consisting of carboxylic acids containing ethylenic
unsaturation and the corresponding ethylenically unsaturated carboxylic acid
anhydrides onto at least one polymer selected from the group consisting of impact or
crystal styrene homopolymers and copolymers, to which at least one tackifying resin
(d) has been added, these graft polymers being furthermore mixed with at least one
polymer (B1) as defined below; and optionally
-at least one out of:
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