阅读说明：本技术 包含轻质填料的组合物 (Composition comprising a lightweight filler ) 是由 R·绍尔 M·克洛茨 T·察恩 P·博恩 于 2018-06-27 设计创作，主要内容包括：本发明涉及含有至少一种反应性粘结剂、至少一种固化剂和/或促进剂、至少一种可热活化的发泡剂和至少一种轻质填料的组合物,其中含有至少一种具有封闭外壳的富含玻璃的火山岩的至少一种膨胀颗粒作为所述轻质填料。本发明还涉及用相应组合物加强和/或补强具有薄壁结构的组件的方法,以及相应制备的组件。(The invention relates to a composition containing at least one reactive binder, at least one curing agent and/or accelerator, at least one heat-activatable blowing agent and at least one light filler, wherein at least one expanded particle of at least one glass-rich volcanic rock having a closed shell is contained as the light filler. The invention also relates to a method for reinforcing and/or stiffening components having a thin-walled structure with a corresponding composition, and to components produced accordingly.)

1. A composition, comprising:

(a) at least one reactive binder;

(b) at least one curing agent and/or accelerator;

(c) at least one heat-activatable blowing agent; and

(d) at least one light filler, containing at least one expanded particle of at least one glass-rich volcanic rock having a closed outer shell as said light filler.

2. The composition according to claim 1, characterized in that said at least one reactive binder is selected from the group consisting of: epoxides, rubbers, peroxide crosslinkable polymers or triglyceride moieties containing unsaturated fatty acids.

3. Composition according to claim 1 or 2, characterized in that it contains, as said reactive binder, from 5 to 50% by weight of at least one polyene, in particular a liquid polyene, preferably a polybutadiene, preferably with a molecular weight Mw lower than 20,000.

4. Composition according to one of claims 1 to 3, characterized in that it contains 5-50% by weight of at least one triglyceride fraction as the reactive binder, the fatty acid profile of the triglyceride fraction having a proportion of at least 5% by weight, in particular at least 60% by weight, of one or more omega-3 fatty acids and/or one or more omega-6 fatty acids, in particular linseed oil.

5. Composition according to one of claims 1 to 4, characterized in that it contains 0.25 to 15% by weight of at least one curing agent and/or accelerator, in particular sulfur.

6. Composition according to one of claims 1 to 5, characterized in that it contains 0.1 to 15% by weight of at least one chemical blowing agent.

7. Composition according to one of claims 1 to 6, characterized by containing 1 to 35% by weight of at least one expanded granule of at least one glass-rich volcanic rock with closed shell, preferably at least one expanded perlite with closed shell.

8. Composition according to one of claims 1 to 7, characterized in that the at least one expanded particle of glass-rich volcanic rock with a closed shell has a maximum particle size of less than 1,000 μm, in particular less than 750 μm, preferably less than 500 μm, particularly preferably less than 400 μm, and/or a weight average particle size d50 of less than 500 μm, in particular from 10 to 500 μm, in particular from 20 to 200 μm, preferably from 30 to 125 μm.

9. Composition according to one of claims 1 to 8, characterized in that the expanded particles acting as light fillers have a weight of less than 500kg/m ³In particular 10 to 500kg/m ³Preferably 100- ³More preferably 200- ³The bulk density of (a).

10. A method of reinforcing and/or stiffening a component having a thin-walled structure, in particular a tubular structure, wherein a composition according to one of claims 1 to 9 is applied to the surface of the structure to be reinforced at a temperature below 70 ℃, in particular at a pump pressure of more than 3 bar, and the composition is cured at a later point in time at a temperature above 130 ℃.

11. Reinforcement and/or stiffening method according to claim 11, characterized in that the composition is applied at a temperature ranging from 40 ℃ to 60 ℃.

12. Reinforcement and/or stiffening method according to claim 11 or 12, characterized in that the composition is applied under an applied pressure of 6 to 180 bar.

13. A component reinforced and/or stiffened with a composition according to one of claims 1 to 9 or prepared according to the method of claims 10 to 12.

14. Use of a composition according to one of claims 1 to 9 for reinforcing and/or stiffening components having a thin-walled structure.

Examples

The method comprises the following steps:

the compositions were mixed together according to table 1. Subsequently, the density and the viscosity at 40 ℃ of the composition were measured. To test the reinforcing properties of the hollow bodies, the compositions were foamed and simultaneously cured at 160 ℃ for 20 minutes.

Both compositions 3 and 4 according to the invention, comprising expanded perlite particles with a closed shell, are easy to handle and can be pumped at pressures up to 360 bar without damaging the lightweight filler. Due to their closed shell and pressure stability, these particles do not absorb any ingredients of the composition or any water, thus maintaining the weight reduction effect and not adversely affecting other mechanical properties. These compositions therefore also exhibit excellent adhesion and result in a particularly smooth surface of the foamed product. In addition, these compositions have particularly high strength.