Akzo N.v.

Akzo Nobel N.v.

Peter Hope

Jernej Jelenic

Auke Gerardus Talma

John Meijer

Andreas Herman Hogt

Andreas P Van Swieten

William J Parr

Kees Helle

Jan Vleggaar

Boyd Cooray

Arie Roos

Process for the modification of polyphenylene ether resin compositions

Process for the modification of .alpha.-olefin (co) polymers

A process for the preparation of a (co)polymer containing at least one unit derived from a citraconimide by curing curable composition comprising at least one substituted or unsubstituted citraconimide and a sufficient amount of an anionic curing catalyst to convert at least 10% of the citraconic alkyl groups on the citraconimide units to alkylene bridges; at a temperature above the melting point of the citraconimide unit and the product of that curing process, are disclosed. The invention also relates to the cured oligomers and articles of manufacture embodying them. These novel, cured oligomers are thermoplastic and offer several advantageous properties.

Citraconimide (co)polymers and curing with anionic catalyst

Organic (co)polymers, including saturated (co)polymers, are modified by contacting them with an organic peroxide and decomposing the peroxide. Use is made of an organic peroxide having the general formula R--(O--O--CHR.sup.1 --CR.sup.2 .dbd.CR.sup.3 R.sup.4)N, wherein N is 1, 2 or 3; R.sup.1 is H, C.sub.1 -C.sub.4 alkyl or C.sub.2 -C.sub.4 alkylene; R.sup.2, R.sup.3 and R.sup.4 are, independently, H or C.sub.1 -C.sub.4 alkyl; two of the substituents R.sup.1 -R.sup.4 together may form C.sub.3 -C.sub.12 alkylene; and, when N is 1, R is an optionally hydroxyl substituted C.sub.4 -C.sub.18 T.alkyl, P-menth-8-yl, C.sub.5 -C.sub.18 T.alkenyl, 1-vinylcyclohexyl or a group of the formula: --C(CH.sub.3)2--C.sub.6 HJ(5--M)--R.sup.5 (M), wherein M is 0, 1 or 2 and R.sup.5 is isopropenyl or 2-hydroxyisopropyl; when N is 2, R is a C.sub.8 -C.sub.12 alkylene or alkynylene group having a tertiary structure at both ends, or a group having the formula --(C)CH.sub.3)2)2--C.sub.6 H(4--X)--R.sup.5 (X), wherein X is 0 or 1; and when N is 3, R is 1,2,4- or 1,3,5-triisopropylbenzene-alpha, alpha'-triyl, i.a., 3-allylperoxy-3,3-dimethylpropene according to a preferred embodiment the modification is carried out in the presence of a coagent, whereby the advantageous polymer properties, such as adhesion to polar materials, are further enhanced.

Modification of (co)polymers employing organic peroxides

Biscitraconimide copolymers with olefinically unsaturated materials

Organic (co)polymers, including saturated (co)polymers, are modified by contacting them with an organic peroxide and decomposing the peroxide. Use is made of an organic peroxide having the general formula: R--(O--O--CHR.sup.1 --CR.sup.2 .dbd.CR.sup.3 R.sup.4)N, wherein N is 1, 2 or 3; R.sup.1 is H, C.sub.1 -C.sub.4 alkyl or C.sub.2 -C.sub.4 alkylene; R.sup.2, R.sup.3 and R.sup.4 are, independently, H or C.sub.1 -C.sub.4 alkyl; two of the substituents R.sup.1 -R.sup.4 together may form C.sub.3 -C.sub.12 alkylene; and, when N is 1, R is an optionally hydroxyl substituted C.sub.4 -C.sub.18 T.alkyl, P-menth-8-yl, C.sub.5 -C.sub.18 T.alkenyl, 1-vinylcyclohexyl or a group of the formula: --C(CH.sub.3)2--C.sub.6 HJ(5--M)--R.sup.5 (M), wherein M is 0, 1 or 2 and R.sup.5 is isopropenyl or 2-hydroxyisopropyl; when N is 2, R is a C.sub.8 -C.sub.12 alkylene or alkynylene group having a tertiary structure at both ends, or a group having the formula: --(C)CH.sub.3)2)2--C.sub.6 H(4--X)--R.sup.5 (X), wherein X is 0 or 1; and when N is 3, R is 1,2,4-or 1,3,5-triisopropylbenzene-alpha, alpha'-triyl, i.a., 3-allylperoxy-3,3-dimethylpropene according to a preferred embodiment the modification is carried out in the presence of a coagent, whereby the advantageous polymer properties, such as adhesion to polar materials, are further enhanced.

The present disclosure relates to novel compounds of the formula: ##STR1## where Y is a hydrogen atom or a metal group and p=1 or 2, and when p=1, ##STR2## n=2, 3, 4 or 5 and n+r.ltoreq.5 and when p=2, ##STR3## m=2, 3 or 4 and m+s.ltoreq.4 and q=0 or 1, where R represents a lower alkyl group containing 1 to 3 carbon atoms, and when q=1, A has the meaning of a substituted or unsubstituted alkylidene group containing 1 to 3 carbon atoms, SO.sub.2, S or O; fire retardant polymer compositions in which these compounds are incorporated, and shaped articles that are entirely or partly made up of such fire retardant polymer compositions.

Dichloro (acetic or propionic) acid aryl ester flame retardants

Metallized polymer compositions are disclosed, the surface of which comprises an intermetallic compound of a metal element A (Sn, As, Sb or Bi) and a metal element B (Fe, Co, Ni, Cu, Zn, Ga, Ru, Rh, Pd, Ag, Cd or In), preferably an intermetallic compound of antimony and a metal element B. Processes for producing such metallized polymer compositions involve either the reduction of a metal element A compound in the presence of metallic metal element B and the polymer or the compression of a laminate of metal element A and metal element B layers onto the polymer. The metallized polymers are useful in the production of printing circuit boards, electromagnetic interference shielding devices, membrane switches, capacitors, conductive fibers, magnetic tapes and disc, antistatic mats, barrier polymers and optical storage devices.

Metallized polymer compositions, processes for their preparation and

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Twello, Netherlands

Peter Hope