阅读说明：本技术 层压方法 (lamination process ) 是由 F·古布尔斯 V·贝利 G·卡姆巴尔德 G·博卡尔纳 于 2018-02-07 设计创作，主要内容包括：本公开提供了一种用于有机硅基层压粘合剂组合物、特别是在室温下或室温左右固化的那些组合物的层压方法。(The present disclosure provides a lamination process for silicone-based laminating adhesive compositions, particularly those that cure at or around room temperature.)

1. A method for manufacturing a laminate assembly comprising a cured laminate adhesive sandwiched between two substrates, the method comprising the steps of:

(i) A dam for providing a sealant or the like around the outer periphery of the first substrate;

(ii) Introducing a flowable silicone-based laminating adhesive onto the first substrate with the sealant dam around an outer periphery of the first substrate;

(iii) Placing a second substrate on top of the first substrate to form a pre-cured assembly, the flowable silicone-based laminating adhesive being trapped between the first substrate and the second substrate;

(iv) (iv) applying a vacuum to the pre-cured assembly of step (iii);

(v) (iv) pressing the pre-cured assembly of step (iv) at a predetermined pressure while maintaining a vacuum;

(vi) (vi) releasing the predetermined pressure of step (v) while maintaining the vacuum for a sufficient period of time so as to ensure that a continuous layer of flowable silicone-based laminating adhesive is provided between the first substrate and the second substrate, as defined by the peripheral dam of sealant;

(vii) (vi) repeating step (v) and then releasing the pressure and vacuum and curing the pre-cured assembly.

2. The method of claim 1, wherein the flowable silicone based lamination adhesive in the pre-cure assembly is cured at room temperature or at a temperature above 60 ℃ to cure the silicone composition, or is treated by UV exposure to cure the silicone composition.

3. The method of claim 2, wherein the curing at a temperature above 60 ℃ is performed in a continuous oven.

4. A method according to claims 1 to 3, wherein the edge region of the laminated assembly is subsequently cut to remove any optical transitions near the edge.

5. the method of any preceding claim, wherein the dam of sealant is made of a Polyisobutylene (PIB) rubber sealant, a silicone hot melt material, or an optically clear silicone sealant.

6. A method according to any preceding claim, wherein prior to step (iii), one or more objects may be attached to the first substrate or the second substrate so as to effectively encapsulate the objects within the cured laminating adhesive layer in the laminated assembly.

7. The method of claim 6, wherein the object is selected from the group consisting of ornaments, electronics, photovoltaic cells or wires and/or other connectors, and the like.

8. The method of any preceding claim, wherein the sealant forming the dam is held around the exterior of a laminate assembly as an external protective seal.

9. A method according to any preceding claim, wherein step (iv) of the method may have a duration of from 15 seconds to 1.5 minutes.

10. A method according to any preceding claim, wherein the time period of step (v) is a time period of from 45 seconds to 3 minutes.

11. A method as claimed in any preceding claim, wherein the time period of step (vi) is similar to the time period of step (iv) and likewise the time period of step (vii) is similar to the time period of step (v).

12. the method of any preceding claim, wherein the pressure applied in steps (vi) and (vi) will be in the range of 10,000Pa to 400,000 Pa.

13. The method of any preceding claim, wherein the substrate is made of glass, wood, stone, plastic, composite, metal, ceramic, or the like.

14. The method of claim 13, wherein at least one substrate is made of glass.

15. the method of any preceding claim, wherein the flowable silicone-based laminating adhesive is made by mixing a multi-part condensation curable laminating adhesive composition based on a titanate/zirconate curing catalyst, the composition comprising the following components:

(i) At least one condensation curable silyl terminated polymer having at least one, typically at least 2, hydrolysable groups and/or hydroxyl functional groups per molecule;

(ii) A crosslinking agent selected from:

A silane having at least 2 hydrolysable groups, alternatively at least 3 hydrolysable groups per molecular group; and/or

A silyl-functional molecule having at least 2 silyl groups, each silyl group containing at least one hydrolysable group;

(iii) A condensation catalyst selected from titanates, zirconates;

Wherein polymer (i) is stored at a different moiety from crosslinker (ii) and catalyst (iii); and characterized in that the condensation catalyst (iii) is present in a molar amount of at least 50% of the moisture accumulated in the respective part of the composition and the molar ratio of silicon-bonded hydroxyl groups in polymer (i) to hydrolysable groups in cross-linker (ii) is greater than 0.5; and the molar ratio of silicon-bonded hydroxyl groups to M-OR functional groups in polymer (i) is greater than 10, where M is titanium OR zirconium.

16. The method of claim 15, wherein the flowable silicone-based laminating adhesive is comprised of components (i), (ii), and (iii) and one or more additives selected from pigments, dyes, adhesion promoters, light diffusing particles, silicone resins, and/or particles having fire blocking properties.

17. the method of claim 15, wherein the multi-part condensation curable laminating adhesive composition additionally comprises pigments, dyes, light diffusing particles, and/or fire resistant properties.

18. the process of any one of claims 15 to 17, wherein the molar ratio of silicon-bonded hydroxyl groups in polymer (i) to hydrolysable groups from crosslinker (ii) is > 0.15 for polymers having a viscosity ≦ 30,000mpa.s at 25 ℃ and > 0.5 for polymers having a viscosity > 30,000mpa.s at 25 ℃.

19. a laminated assembly obtained by the method according to any one of claims 1 to 18.

20. The assembly of claim 19, wherein the assembly comprises two glass substrates, wherein the assembly is cooled and bent to produce a bent glass product.

21. Use of an assembly according to claim 19 obtained by a method according to any one of claims 1 to 18 as a visible glass part in windows and doors, as one or more parts in railing, balcony or roof applications, as part of a sill wall or crate in curtain walls, as a part of an interior partition wall, as a safety glass laminate, for electronic display applications, as one or more parts in fire-proof window or door units, as a solar control part or for a sound-insulating barrier.

Examples

All viscosity measurements were performed using a Brookfield cone and plate viscometer RV DIII using the most appropriate cone and plate at 25 ℃ unless otherwise specified.

The compositions used in the following examples were made by mixing part a and part B together in a speed mixer. Part a and part B were introduced into a speed mixer and then mixed at 2000 revolutions per minute (rpm) for four 30 second periods. dimethyl-OH-terminated polydimethylsiloxanes (viscosity of about 50,000mPa.s) exhibit typical number average molecular weights of 63,000 g/mol. Trimethoxysilyl terminated polydimethylsiloxane (viscosity of about 56,000mpa.s) exhibited a typical number average molecular weight of 62,000 g/mol. OH-terminated polydimethylsiloxanes (viscosity of about 2,000mPa.s) exhibit typical number average molecular weights of 22,000 g/mol. dimethyl-OH-terminated polydimethylsiloxane (viscosity of about 13,500mPa.s) exhibited a typical number average molecular weight of 43,000 g/mol. Trimethoxysilyl terminated polydimethylsiloxanes (viscosity of about 2,000mPa. s) exhibit typical number average molecular weights of 22,000 g/mol.

Preparation A

the flowable silicone-based room temperature curing adhesive was prepared by mixing the two components together, adding the binder (part a) in a 3: 1 ratio by weight relative to the curing agent (part B). The binder consisted of a silanol terminated polydimethylsiloxane of 50,000 mpa.s. The curing agent consisted of 100 parts by weight of 56,000mpa.s trimethoxysilyl terminated polydimethylsiloxane and 0.2 parts by weight of tetra-n-butyl titanate. Part a and part B were introduced into a speed mixer and then mixed at 2000 revolutions per minute (rpm) for four 30 second periods.

Description of the procedures

Assembly of 200X 4mm using two panes of float glass as first and second substrates³A laminated glass pane of (1). Using a silicone hot melt adhesive deposited on the periphery of the first glass pane (Instantglaze III window assembly adhesive). The bead thickness was about 2mm thick. The interior of the dam is filled with a flowable silicone-based room temperature curing adhesive in the center of the pane. The flowable silicone-based room temperature curing adhesive flowed slowly to form a disc.

After coating, the two panes are placed on top of each other, sandwiching the adhesive between them, to form a pre-cured assembly, and then the panes are placed inIn a Company vacuum apparatus (HVV90500) and the vacuum was drawn off using a vacuum pump for a defined time (see table). Once this time is reached, pressure is applied to the pre-cure assembly at a pressure of 80,000Pa for a defined time using a pressure plate. Subsequently releasing the pressure while maintainingThe vacuum is held for a given time, after which pressure is reapplied for a given time. Finally, the vacuum was released to atmospheric pressure and the pane was allowed to complete the curing process at room temperature.

Examples containing formulation A

examples containing formulation A