Polyester resin compositions and uses thereof
AssigneeFosroc Mining International Limited
InventorDuncan Hywel-Evans
Life of this patent
Estimating the term…
Abstract
A cross-linkable polyester resin composition for use with a reinforcing element for reinforcing rock and other structures, comprises: (a) from 10 to 45% of a cross-linkable unsaturated polyester resin, (b) from 40 to 90% of a filter and (c) from 1 to 15% of an ethylenically unsaturated monomer copolymerizable with the polyester, the percentages being by weight based on the total weight of (a), (b) and (c), the composition being solid but permitting insertion and rotation of a reinforcing element to cause mixing of the composition with a cross-linking catalyst to form a hard mass. Composition will cold cure when mixed with catalyst preferably the monomer has higher flash point than styrene. Advantage of the solid composition is that it does not need to be enclosed within frangible sheath as in the prior art.
Claims22
A cross linkable polyester resin composition suitable for use with a reinforcing element for reinforcing rock and other structures, said composition comprising:
- (a) from 10 to 45% of a crosslinkable unsaturated polyester resin,
- (b) from 40 to 90% of a filler and
- (c) from 1 to 15% of an ethylenically unsaturated monomer copolymerisable with the polyester, the percentages being by weight based on the total weight of (a), (b) and (c), the composition being solid but permitting insertion and rotation of a reinforcing element to cause mixing of the composition with a crosslinking catalyst to cold cure to form a hard mass.
A shaped article suitable for use in the reinforcement of rock and other structures or providing an anchor therein said article being of an elongate shape to permit insertion into a hole drilled in the rock, and comprising a cold cure cross linkable polyester resin composition which comprises:
- (a) from 10 to 45% of a crosslinkable unsaturated monomer copolymerisable with the polyester wherein;
- the percentages are by weight of the total weight of (a), (b) and (c);
- and
- wherein said composition is solid at 20° C. and has a hardness that permits insertion of a reinforcing or anchoring element and rotation of the element in the composition.
A shaped solid polyester resin composition suitable for use in the reinforcement of rock and other structures or providing an anchoring means therein said composition being of an elongate shape eg cylindrical to permit insertion in a hole drilled in the rock and comprising
- (a) from 10 to 45% of a crosslinkable unsaturated polyester resin,
- (b) from 40 to 90% of a filler and
- (c) from 1 to 15% of an ethylenically unsaturated monomer copolymerisable with the polyester, the percentages being by weight of the total weight of (a), (b) and (c), said composition being solid at 20° C. and having a hardness that permits insertion of a reinforcing or anchoring element and rotation of the element in the composition.
A method of providing a support or anchor in a borehole, comprising
- (a) inserting into the borehole a shaped article solid at 20 degrees C. and comprising a cross linkable polyester resin composition of 10-45% by weight crosslinkable unsaturated polyester resin, 1-15% by weight of an ethylenically unsaturated monomer copolymerizable with the polyester resin, 40-90% by weight filler, and an effective amount of a crosslinking catalyst, and without a frangible tube covering the solid shaped article, so that the solid shaped article stays in the borehole;
- (b) bringing a reinforcing or anchoring element into contact with the shaped solid;
- (c) moving the reinforcing or anchoring element with respect to the shaped solid to cause the element to penetrate the shaped solid, and to cause mixing of the resin and catalyst;
- and
- (d) mixing of the resin and catalyst effecting cold cure crosslinking of the resin and catalyst and thereby causing the solid to harden into a hard mass which secures the reinforcing or anchoring element in the hard mass.
Dependencies are inferred from the claim text.