Polymer concrete having high bond strength and long working time
AssigneeThe Dow Chemical Company
InventorsWilliam C. Cunningham, Randy A. Ramsey, Randal E. Autenrieth
Life of this patent
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Abstract
Polymer concretes having a high bond strength and/or long working times are made from a curable composition of norbornyl modified unsaturated polyester or polyesteramide resins blended with a polymerizable monomer such as styrene, an aggregate mixture such as sand and gravel and an effective amount of styrene acrylonitrile copolymers, styrene alphamethylstyrene copolymers, or a styrene acrylonitrile copolymer mixture with no more than 25% by weight polystyrene.
Claims9
In a curable polymer concrete composition with a high bond strength and a long working time comprising
- (a) norbornyl modified unsaturated polyester or polyesteramide resin blend with a polymerizable monomer and
- (b) an aggregate mixture, the improvement which comprises the inclusion of
- (c) an amount of a styrene copolymer additive effective to give a measurable increase in bond strength, a longer working time or both selected from the group consisting of
- (1) styrene acrylonitrile copolymers
- (2) styrene alphamethylstyrene copolymers, and
- (3) styrene acrylonitrile copolymer mixtures with no more than 25% by weight polystyrene.
A curable polymer concrete composition with a high bond strength and a long working time comprising
- (a) from 6 to 25% by weight of a blend of a norbornyl modified unsaturated polyester or polyesteramide resin containing 1 to 80% by weight of a polymerizable monomer,
- (b) from 93 to 64% by weight by an aggregate mixture, and
- (c) from 1.0 to 115 weight of a styrene copolymer additive consisting of
- (1) styrene acrylonitrile copolymers,
- (2) styrene alphamethyl styrene copolymers, or
- (3) styrene acrylonitrile copolymer mixture with no more than than 25% by weight of polystyrene.
Dependencies are inferred from the claim text.