Mitsui Petrochemical Industries, Ltd.

Mitsui Sekiyu Kagaku Kogyo Kabushiki Kaisha

Tadao Iwata

Kinya Mizui

Masami Takeda

Nobuyuki Takeda

Riichiro Nagano

Hiroshi Iizuka

Shuichi Ishiwata

Kaoru Tominaga

Hiroshi Kiga

According to the present invention, a coat is formed by applying a coating composition comprising an epoxy resin obtained by a bisphenol represented by the formula: ##STR1## wherein R.sub.1 and R.sub.2 represent a hydrogen atom or an alkyl group containing from 1 to 3 carbon atoms and a curing agent, to a substrate; and thereafter contactings the resulting coat with a liquid such as warm water or hot water in a one stage or multistage process. The thus formed coat is excellent in properties such as heat resistance, particularly erosion resistance adhesive properties and resistance to leaching of organic constituents contained in the coat exposed to hot water.

Coating compositions

Disclosed are epoxy resin compositions comprising a 1,1-bis(4-hydroxyaryl) lower alkane type epoxy resin, hydroquinone and a reaction catalyst, or a 1,1-bis(4-hydroxyaryl) lower alkane type epoxy resin and N-aminoalkyl-substituted piperazine or a modified product thereof. These epoxy resin compositions as prepared are in a liquid state and hence resin moldings can be manufactured therefrom by such a simple technique as casting. It is also possible to cure these resin compositions at a temperature below 150.degree. C., and the resin moldings obtained therefrom are tough and excellent in impact resistance as well as in heat resistance.

Epoxy resin compositions

A hydrocarbon resin consisting essentially of a copolymer of (A) an unsaturated chain hydrocarbon or a cyclic hydrocarbon having a vinylidene group and (B) 9,10-dihydrodicyclopentadiene or its derivative, or a hydrocarbon resin modified by addition reacting an ethylenically unsaturated carboxylic acid or its anhydride, or hydrogen, to the above-mentioned copolymer. The hydrocarbon resin and the modified hydrocarbon resin have a high softening point and a low melt viscosity, and are suitable for use in adhesives and traffic paints.

Hydrocarbon resin and modified hydrocarbon resin product thereof

A glass-reinforced polymer composition of the invention contains 80 to 99.99 parts by weight, of a 4-methyl-1-pentene polymer, 0.01 to 20 parts by weight of a graft-modified polymer of 4-methyl-1-pentene having graft units of an unsaturated carboxylic acid or an acid anhydride thereof in an amount of 0.5 to 15% by weight and having a limiting viscosity of 0.3 to 10 dl/g, and 1 to 300 parts by weight of glass fibers based on 100 parts by weight of the sum of the 4-methyl-1-pentene polymer and the graft-modified polymer. The composition has overall standards of mechanical strength, heat resistance and water resistance.

Glass-reinforced polymer composition comprising 4-methyl-1-pentene

A high-molecular-weight novolak type substituted phenolic resin having a number average molecular weight of at least 1500 is prepared by reacting (A) (i) a phenol comprised mainly of a bifunctional phenol or (ii) a low-molecular-weight novolak type substituted phenolic resin derived from this phenol and an aldehyde with (B) a chain extender selected from the group consisting of (i) a dimethylolated product of a bifunctional or trifunctional phenol, (ii) a low-molecular-weight resol type substituted phenolic resin derived from a phenol comprised mainly of a bifunctional phenol and an aldehyde, (iii) an aldehyde, (iv) a ketone, (v) a diol and (vi) a dihalide in the presence of an acid catalyst, with the proviso that if the reactant (A) is the phenol (i), the chain extender is the resol type substituted phenolic resin (ii). The molecular weight of this novolak type substituted phenolic resin is much higher than the molecular weights of conventional novolak type phenolic resins, and if this phenolic resin is incorporated into various setting type resins, the heat resistance and mechanical properties of these resins can remarkably be improved.

High-molecular-weight novolak types substituted phenolic resins and

Disclosed is a setting type resin composition comprising (A) a setting type resin and (B) 10 to 200 parts by weight, per 100 parts by weight of said resin (A), of a substantially linear, high-molecular-weight novolak type substituted phenolic resin which comprises a constituent phenol component comprised mainly of a bifunctional phenol and has a number average molecular weight of at least 1500. This resin composition has highly improved heat resistance and mechanical strength characteristics by virtue of incorporation of the high-molecular-weight novolak type substituted phenolic resin, and this improving effect is especially prominent when an epoxy resin is used as the setting type resin.

Growing community of inventors

Chiba, Japan

Tadao Iwata