초록 ▼

This invention relates to low viscosity curable polyester resin compositions and a process for the preparation thereof, which compositions contain a mixture of (i) an unsaturated ester terminally modified with a reactive olefin such as dicyclopentadiene or other Diels-Alder adducts of cyclopentadien

This invention relates to low viscosity curable polyester resin compositions and a process for the preparation thereof, which compositions contain a mixture of (i) an unsaturated ester terminally modified with a reactive olefin such as dicyclopentadiene or other Diels-Alder adducts of cyclopentadiene with an olefinic or acetylenic hydrocarbon or alkylated derivative thereof and (ii) a polymerizable ethylenically unsaturated monomer which serves to crosslink the unsaturated ester to a thermoset product. Fiber reinforced thermoset articles can be produced from these low viscosity curable polyester resin compositions.

대표청구항 ▼

A process for preparing a resin composition comprising the steps of: (a) contacting maleic acid or anhydride with an organic polyol for a time and at a temperature sufficient to form a composition comprising a maleate ester having the formula: [Figure] (I) wherein n is a number having an average val

A process for preparing a resin composition comprising the steps of: (a) contacting maleic acid or anhydride with an organic polyol for a time and at a temperature sufficient to form a composition comprising a maleate ester having the formula: [Figure] (I) wherein n is a number having an average value of about 2 to less than about 4, m is a number equal to the free valence of R less the average value of n, the ratio of n to m is greater than about 2.0, and R is the hydroxyl-free residue of an organic polyol which contained from 2 to 4 inclusive hydroxyl groups; (b) heating the maleate ester of (a) in the presence of a catalyst for a time and at a temperature sufficient to form a composition comprising a fumarate ester having the formula: [Figure] (II) wherein n, m and R are as defined above; (c) contacting a Diels-Alder adduct of cyclopentadiene with an olefinic or acetylenic hydrocarbon or alkylated derivative thereof with about stoichiometric amounts of carboxyl groups of the fumarate ester of (b) in the presence of a non-oxidizing acid catalyst having a non-nucleophilic anion for a time and at a temperature sufficient to form a composition comprising an unsaturated ester having the formula: [Figure] (III) wherein n, m and R are as defined above and R1 is the residuum of a Diels-Alder adduct of cyclopentadiene with an olefinic or acetylenic hydrocarbon or alkylated derivative thereof having from 2 to about 20 carbon atoms; and (d) admixing a copolymerizable ethylenically unsaturated monomer with the unsaturated ester of (c).