Additives for controlling cure rate of polymerizable composition
AssigneeLord Corporation
InventorsRobin F. Righettini, Kirk J. Abbey
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Abstract
A free radical curable composition that includes a free radical curable and a vinyl aromatic compound that is chemically different than the free radical curable component, wherein the vinyl aromatic compound is present in an amount sufficient to decelerate the cure rate of the free radical composition without adversely effecting completion of cure and the properties of the curable composition after it has cured. The composition is particularly useful as a two part adhesive that includes a free radical catalyst system and a diene elastomer.
Claims28
A free radical curable composition having a cure rate comprising:
- (a) a free radical curable part comprising at least one free radical curable component;
- and
- (b) a vinyl aromatic compound that is chemically different than the free radical curable component, wherein the vinyl aromatic compound is selected from .alpha.-methylstyrene and 4-methylstyrene and is present in an amount of less than 5 weight percent based on the weight of the free radical curable part, such amount being sufficient to decelerate the cure rate of the free radical composition without adversely effecting completion of cure and the properties of the curable composition after it has cured.
A method for adjusting the cure rate of a free radical curable adhesive composition comprising making a free radical curable part by mixing together at least:
- (a) at least one free radical curable ethylenically unsaturated monomer selected from the group consisting of a (meth)acrylic-based monomer, a maleate ester, a fumarate ester, a vinyl ester, a conjugated diene, an itaconic acid or ester and a vinylidene halide;
- (b) an elastomer;
- (c) at least one component of a free radical catalyst system;
- and
- (d) a vinyl aromatic compound that is chemically different than the ethylenically unsaturated monomer, wherein the vinyl aromatic compound is added in an amount of less than 5 weight percent based on the weight of the free radical curable part, such amount being sufficient to decelerate the cure rate of the adhesive composition without adversely effecting completion of cure and the properties of the curable composition after it has cured.
A method for adjusting the cure rate of a free radical curable adhesive composition comprising mixing together:
- (a) at least one free radical curable ethylenically unsaturated monomer selected from the group consisting of a (meth)acrylic-based monomer, a maleate ester, a fumarate ester, a vinyl ester, a conjugated diene, an itaconic acid or ester and a vinylidene halide;
- (b) an elastomer;
- and
- (c) at least one component of a free radical catalyst system, to form a masterbatch and then mixing with the masterbatch
- (d) a vinyl aromatic compound that is chemically different than the ethylenically unsaturated monomer, wherein the vinyl aromatic compound is added in an amount sufficient to decelerate the cure rate of the adhesive composition without adversely effecting completion of cure and the adhesive properties of the curable composition after it has cured.
A free radical curable adhesive composition having a cure rate comprising:
- (a) a free radical curable part including at least one free radical curable component comprising an ethylenically unsaturated monomer selected from the group consisting of a (meth)acrylic-based monomer, a maleate ester, a fumarate ester, a vinyl ester, a conjugated diene, an itaconic acid or ester and a vinylidene halide;
- (b) a vinyl aromatic compound that is chemically different than the free radical curable component, wherein the vinyl aromatic compound is present in an amount of less than 5 weight percent based on the weight of the free radical curable part, such amount being sufficient to decelerate the cure rate of the free radical composition without adversely effecting completion of cure and the properties of the curable composition after it has cured;
- and
- (c) a free radical catalyst system for curing the adhesive.
Dependencies are inferred from the claim text.