阅读说明：本技术 一种新型高强石膏保温腻子及其制备方法 (Novel high-strength gypsum heat-insulating putty and preparation method thereof ) 是由 张福恒 张尊杰 单秀军 于 2020-12-30 设计创作，主要内容包括：本申请涉及墙面装修材料领域,具体涉及一种新型高强石膏保温腻子及其制备方法。一种新型高强石膏保温腻子,其包括如下重量份的制备原料：α-高强石膏50-70份、玻化微珠7-10份、纤维素醚0.1-0.3份、可再分散性乳胶粉1-2份、缓凝剂0.1-0.5份、触变剂0.1-0.5份、引气剂0.01-0.05份；所述玻化微珠的粒径为180-200目；所述纤维素醚包括2wt%、20℃粘度为18000-22000mPa.s的改性纤维素醚。本申请提供的新型高强石膏保温腻子可作为石膏保温砂浆,又可以作为石膏腻子找平使用,施工后无需另外的石膏腻子找平,一遍施工厚度可达30mm,减少施工工序,施工流畅,施工后墙面均匀、批刮细腻、无色差,具有优异的装饰效果,且后期保温性能不降低、无空鼓开裂现象。(The application relates to the field of wall surface decoration materials, in particular to novel high-strength gypsum heat-insulating putty and a preparation method thereof. A novel high-strength gypsum heat-insulating putty comprises the following preparation raw materials in parts by weight: 50-70 parts of alpha-high-strength gypsum, 7-10 parts of vitrified micro bubbles, 0.1-0.3 part of cellulose ether, 1-2 parts of redispersible latex powder, 0.1-0.5 part of retarder, 0.1-0.5 part of thixotropic agent and 0.01-0.05 part of air entraining agent; the particle size of the vitrified micro bubbles is 180-200 meshes; the cellulose ether comprises 2wt% of modified cellulose ether with viscosity of 18000-22000mPa.s at 20 ℃. The application provides a novel gypsum heat preservation putty that excels in can regard as gypsum heat preservation mortar, can make level the use as gypsum putty again, need not other gypsum putty after the construction and make level, and a construction thickness can reach 30mm, reduces the construction process, and the construction is smooth, and the wall is even after the construction, criticize fine and smooth, no colour difference, has excellent decorative effect, and later stage thermal insulation performance does not reduce, does not have the hollowing fracture phenomenon.)

1. The novel high-strength gypsum heat-insulating putty is characterized by comprising the following preparation raw materials in parts by weight: 50-70 parts of alpha-high-strength gypsum, 7-10 parts of vitrified micro bubbles, 0.1-0.3 part of cellulose ether, 1-2 parts of redispersible latex powder, 0.1-0.5 part of retarder, 0.1-0.5 part of thixotropic agent and 0.01-0.05 part of air entraining agent; the particle size of the vitrified micro bubbles is 180-200 meshes; the cellulose ether comprises 2wt% of modified cellulose ether with viscosity of 18000-22000mPa.s at 20 ℃.

2. The novel high-strength gypsum thermal insulation putty as set forth in claim 1, wherein the cellulose ether further comprises 2wt% methyl hydroxypropyl cellulose ether with viscosity at 20 ℃ of 70000 and 80000 mPa.s.

3. The novel high-strength gypsum thermal insulation putty as set forth in claim 2, characterized in that the mass ratio of the 2wt% methyl hydroxypropyl cellulose ether with 20 ℃ viscosity of 70000-: (2-3).

4. The novel high-strength gypsum thermal insulation putty as set forth in claim 1, characterized in that the alpha-high-strength gypsum is DLJ-02 and/or DLJ-01.

5. The novel high-strength gypsum thermal insulation putty as claimed in claim 1, characterized in that the bulk density of the redispersible latex powder is 450-550 g/L.

6. The novel high-strength gypsum thermal insulation putty as set forth in claim 1, wherein said set retarder comprises a gypsum set retarder having a 20wt% solution pH of 6-8 at 20 ℃.

7. The novel high-strength gypsum heat-insulating putty as claimed in claim 6, wherein the retarder further comprises sodium gluconate, and the mass ratio of the sodium gluconate to the gypsum retarder with a 20wt% solution pH value of 6-8 at 20 ℃ is 1: (1.4-1.8).

8. The novel high-strength gypsum thermal insulation putty as set forth in any one of claims 1 to 7, characterized in that the thixotropic agent is prepared from polyamide thixotropic agent and hydrophobic fumed silica in a mass ratio of 1: (0.4-0.6) mixing.

9. The novel high-strength gypsum thermal insulation putty as set forth in claim 8, characterized in that the acid value of said polyamide thixotropic agent is 13-15 mgKOH/g.

10. The preparation method of the novel high-strength gypsum thermal insulation putty as set forth in any one of claims 1-9, characterized in that it comprises the following steps:

s1: uniformly mixing and stirring the alpha-high-strength gypsum and the vitrified micro bubbles to obtain a mixture 1;

s2: adding water with the mass 15-20 times of that of the mixture into the mixture 1, uniformly mixing and stirring, adding redispersible latex powder, a retarder, a thixotropic agent and an air entraining agent, and uniformly mixing to obtain a mixture 2;

s3: and adding cellulose ether into the mixture 2, uniformly mixing, and then placing in a shearing machine for shearing and dispersing to obtain the novel high-strength gypsum heat-insulating putty.

Technical Field

The application relates to the field of wall surface decoration materials, in particular to novel high-strength gypsum heat-insulating putty and a preparation method thereof.

Background

Government support and requirements of people on decoration materials are continuously improved, and development of the putty powder is also continuously improved. The putty is a decorative material for leveling the surface of a wall body, is thick paste paint and is an essential product before painting. One of the important functions of putty is to level the wall surface, fill the concave portion, cover the convex portion, and then artificially polish and level. The putty needs to satisfy a good adhesion property. The putty not only needs to have the original functions and effects, but also meets the requirements of environmental protection, and the putty needs to have less components and less chemical substances.

The wall scraping putty which is mainly made of the building gypsum is hardly waterproof and heat-resistant, and engineering quality problems such as falling, wrinkling, peeling and the like often occur after painting, particularly, the putty layer is too thick (more than 2.0mm) in one-time construction, and phenomena such as cracking, foaming, powder falling and the like easily occur to the putty. The existing heat-insulating putty usually adopts expanded perlite and aerated concrete blocks as a non-combustible building heat-insulating material, but the expanded perlite has the defects of high water absorbability, high volume loss rate during stirring, low later-stage heat-insulating property, hollowing cracking and the like, and has low mechanical strength; the aerated concrete block has complex process and large investment.

In view of the above-mentioned related technologies, the applicant believes that there is a great need to develop a novel high-strength gypsum heat-insulating putty.

Disclosure of Invention

In order to solve the problem that the heat insulation and mechanical strength of the putty cannot be improved simultaneously, the application provides the novel high-strength gypsum heat insulation putty and the preparation method thereof.

In a first aspect, the application provides a novel high-strength gypsum heat-insulating putty, which is realized by adopting the following technical scheme:

a novel high-strength gypsum heat-insulating putty comprises the following preparation raw materials in parts by weight: 50-70 parts of alpha-high-strength gypsum, 7-10 parts of vitrified micro bubbles, 0.1-0.3 part of cellulose ether, 1-2 parts of redispersible latex powder, 0.1-0.5 part of retarder, 0.1-0.5 part of thixotropic agent and 0.01-0.05 part of air entraining agent; the particle size of the vitrified micro bubbles is 180-200 meshes; the cellulose ether comprises 2wt% of modified cellulose ether with viscosity of 18000-22000mPa.s at 20 ℃.

By adopting the technical scheme, the application adopts the redispersible latex powder to improve the cohesiveness and the bonding strength of the novel high-strength gypsum heat-insulating putty; the operable time and the setting time can be adjusted by the retarder; the air entraining agent can introduce a large amount of evenly distributed micro bubbles in the stirring process, so that the workability of the slurry is improved, and the heat conductivity coefficient is low; the 180-mesh and 200-mesh vitrified micro-beads with lighter volume weight are selected as the heat-insulating filling material, so that the phenomena of hollowing and cracking of expanded perlite (200 meshes) and the like are effectively avoided, the problem of reduced later-stage heat-insulating effect is also avoided, and the tensile bonding strength and the compressive strength of the novel high-strength gypsum heat-insulating putty are improved; meanwhile, the alpha-high-strength gypsum with higher strength is used as a cementing material, so that the gypsum solidification speed can be greatly reduced, and the novel high-strength gypsum heat-insulating putty has lower heat conductivity coefficient, higher tensile bonding strength and compressive strength and better freeze-thaw resistance. The components act together, so that the novel high-strength gypsum heat-insulating putty has high strength, strong cohesive force and good heat-insulating effect.

The application provides a novel gypsum that excels in keeps warm putty can be applied to indoor interior wall and decorates, both can regard as gypsum heat preservation mortar, can regard as gypsum putty again to make level the use, need not gypsum putty after the construction and make level again, and a construction thickness can reach 30mm, reduces the construction process, and the construction is smooth, and the wall is even after the construction, criticize fine and smooth, the no colour difference of scraping, has excellent decorative effect.

In the present application, the 2wt% and 20 ℃ viscosity means that the cellulose ether has a mass percentage of 2wt% and a viscosity at 20 ℃.

Preferably, the cellulose ether further comprises 2wt% of methyl hydroxypropyl cellulose ether with viscosity of 70000 and 80000mPa.s at 20 ℃.

By adopting the technical scheme, 2wt% of modified cellulose ether with viscosity of 18000-80000 mPa.s at 20 ℃ and 2wt% of methyl hydroxypropyl cellulose ether with viscosity of 70000-80000mPa.s at 20 ℃ are compounded, so that the reduction of the solubility, the mortar strength and the workability due to the high-viscosity cellulose ether can be effectively relieved, the water retention rate of the cellulose ether is ensured to be more than 92%, the plasticity and the adhesive bonding force of the mortar are improved, the pulverization and the cracks are prevented, and the mechanical strength is effectively improved.

Preferably, the mass ratio of the 2wt% methyl hydroxypropyl cellulose ether with the viscosity of 70000-80000mPa.s at 20 ℃ to the 2wt% modified cellulose ether with the viscosity of 18000-22000mPa.s at 20 ℃ is 1: (2-3); more preferably, the mass ratio of the 2wt% methyl hydroxypropyl cellulose ether having a viscosity at 20 ℃ of 70000-: 2.5.

by adopting the technical scheme, the mass ratio of 2wt% of methyl hydroxypropyl cellulose ether with the viscosity of 20 ℃ of 70000-.

Preferably, the alpha-high-strength gypsum is DLJ-02 and/or DLJ-01; more preferably, the alpha-high strength gypsum is DLJ-02.

By adopting the technical scheme, when the alpha-high-strength gypsum is adopted as DLJ-02, the corresponding novel high-strength gypsum heat-insulating putty has lower heat conductivity coefficient and higher tensile bonding strength and compressive strength.

Preferably, the set retarder comprises a gypsum set retarder having a 20wt% solution pH of 6 to 8 at 20 ℃.

By adopting the technical scheme, the gypsum retarder with the pH value of 6-8 at 20 ℃ and 20wt% of solution can improve the retarding effect, and can improve the tensile bonding strength and the compressive strength of the novel high-strength gypsum heat-insulating putty under the combined action of the gypsum retarder, the redispersible latex powder, the cellulose ether, the alpha-high-strength gypsum and the 180-mesh vitrified micro-beads.

Preferably, the retarder also comprises sodium gluconate, and the mass ratio of the sodium gluconate to the gypsum retarder with the solution pH value of 6-8 at 20 ℃ and 20wt% is 1: (1.4-1.8).

By adopting the technical scheme, the retarder is prepared by compounding the sodium gluconate and the gypsum retarder with the pH value of 20wt% solution of 6-8 at 20 ℃, and the mass ratio of the sodium gluconate to the gypsum retarder is controlled, so that the retarding effect is optimal, and the heat preservation effect and the mechanical strength of the novel high-strength gypsum heat preservation putty are improved.

Preferably, the thixotropic agent is prepared from a polyamide thixotropic agent and hydrophobic fumed silica according to a mass ratio of 1: (0.4-0.6) mixing.

By adopting the technical scheme, the polyamide thixotropic agent and the hydrophobic fumed silica are compounded to serve as the thixotropic agent, not only is the sedimentation of the alpha-high-strength gypsum and the vitrified micro bubbles prevented, but also the viscosity of a system can not be reduced, and the net structure of the polyamide thixotropic agent improves the heat insulation effect and the mechanical strength of the novel high-strength gypsum heat insulation putty.

Preferably, the acid value of the polyamide thixotropic agent is 13-15 mgKOH/g; more preferably, the acid value of the polyamide thixotropic agent is 14 mgKOH/g.

By adopting the technical scheme, the polyamide thixotropic agent with the acid value of 14mgKOH/g is adopted, the acid value is higher, the compatibility of the thixotropic agent and cellulose ether is promoted, the network structure of the polyamide thixotropic agent is not easy to disappear after meeting water, and the soaking tensile bonding strength of the novel high-strength gypsum heat-insulating putty is greatly improved.

In a second aspect, the application provides a preparation method of novel high-strength gypsum heat-insulating putty, which adopts the following technical scheme:

a preparation method of novel high-strength gypsum heat-insulating putty comprises the following steps:

s1: uniformly mixing and stirring the alpha-high-strength gypsum and the vitrified micro bubbles to obtain a mixture 1;

s2: adding water with the mass 15-20 times of that of the mixture into the mixture 1, uniformly mixing and stirring, adding redispersible latex powder, a retarder, a thixotropic agent and an air entraining agent, and uniformly mixing to obtain a mixture 2;

s3: and adding cellulose ether into the mixture 2, uniformly mixing, and then placing in a shearing machine for shearing and dispersing to obtain the novel high-strength gypsum heat-insulating putty.

Through adopting above-mentioned technical scheme, the preparation simple process, the mild condition of the novel high strength gypsum heat preservation putty that this application provided, complete environmental protection, and adopt and add the preparation raw materials in batches, novel high strength gypsum heat preservation putty's comprehensive effect is more excellent.

In summary, the present application has the following beneficial effects:

1. the application provides a novel gypsum that excels in keeps warm putty can be applied to indoor interior wall and decorates, both can regard as gypsum heat preservation mortar, can regard as gypsum putty again to make level the use, need not additional gypsum putty after the construction and make level, and a construction thickness can reach 30mm, reduces the work procedure, and the construction is smooth, and the wall is even after the construction, criticize and scrape fine and smooth, do not have the colour difference, has excellent decorative effect.

2. The application selects the 180-mesh and 200-mesh vitrified micro-beads with lighter volume weight as the heat-insulating filling material, effectively avoids the phenomena of hollowing and cracking of the expanded perlite (200 meshes) and the like, also avoids the problem of reduced later heat-insulating effect, and simultaneously improves the tensile bonding strength and compressive strength of the novel high-strength gypsum heat-insulating putty; meanwhile, the alpha-high-strength gypsum with higher strength is used as a cementing material, so that the gypsum solidification speed can be greatly reduced, and the novel high-strength gypsum heat-insulating putty has lower heat conductivity coefficient, higher tensile bonding strength and compressive strength and better freeze-thaw resistance.

Detailed Description

The present application will be described in further detail with reference to examples and comparative examples.

The raw materials used in the examples and comparative examples of the present application are commercially available, and unless otherwise specified, the raw materials used in the examples and comparative examples of the present application are derived from the following table 1, and the raw materials not mentioned in the following table 1 are purchased from national drug group chemical agents ltd.

TABLE 1

Examples

Examples 1-23 provide a novel high strength gypsum thermal insulating putty, which is described below by taking example 1 as an example.

The embodiment 1 provides a novel high-strength gypsum heat-insulating putty, which comprises the following preparation steps:

s1: mixing and stirring 50g of alpha-high-strength gypsum and 7g of vitrified micro bubbles uniformly to obtain a mixture 1;

s2: adding 1kg of water into the mixture 1, mixing and stirring uniformly, adding 1g of redispersible emulsion powder, 0.1g of retarder, 0.1g of thixotropic agent and 0.01g of air entraining agent, mixing uniformly, and mixing and stirring for 40min at a stirring speed of 50rpm to obtain a mixture 2;

s3: adding 0.1g of cellulose ether into the mixture 2, uniformly mixing, placing in a shearing machine, and shearing and dispersing at the speed of 2000rpm for 20min to obtain the novel high-strength gypsum heat-insulating putty;

wherein the mesh number of the alpha-high-strength gypsum is 200;

the mesh number of the vitrified micro bubbles is 200;

the grade of the redispersible latex powder is 328N;

the model of the retarder is HSG-1;

the thixotropic agent is a BYK-410 thixotropic agent;

the air entraining agent is sodium dodecyl sulfate;

the grade of the cellulose ether is Walocel XM 20000 PV.

Examples 2-4, like example 1, differ only in that: the novel high-strength gypsum heat-insulating putty is prepared from different raw materials in different quality, and is specifically shown in table 2.

TABLE 2

Components	Example 1	Example 2	Example 3	Example 4
					Alpha-high strength gypsum (g)	50	70	60	65
Glass bead (g)	7	10	8	9
					Water (kg)	1	1.5	1.3	1.4
Redispersible latex powder (g)	1	2	1.5	1.7
					Retarder (g)	0.1	0.5	0.3	0.4
Thixotropic agent (g)	0.1	0.5	0.3	0.4
					Air entraining agent (g)	0.01	0.05	0.03	0.04
Cellulose ether (g)	0.1	0.3	0.2	0.25

Examples 5-10, like example 4, differ only in that: the cellulose ethers are different and are shown in table 3.

TABLE 3

Examples	Cellulose ethers
		Example 4	Walocel XM 20000PV
Example 5	Walocel XM 20000PV and HK75000S in a mass ratio of 1: 2 are mixed to form
		Example 6	Walocel XM 20000PV and HK75000S in a mass ratio of 1: 3 are mixed to form
Example 7	Walocel XM 20000PV and HK75000S in a mass ratio of 1: 2.5 are mixed to form
		Example 8	Walocel XM 20000PV and HK10000S are mixed according to the mass ratio of 1: 2.5 are mixed to form
Example 9	Walocel MKX 25000 PF25L and HK10000S in a mass ratio of 1: 2.5 are mixed to form
		Example 10	Walocel MKX 25000 PF25L

Example 11, like example 7, differs only in that: the alpha-high-strength gypsum is DLJ-02.

Example 12, like example 7, differs only in that: the alpha-high-strength gypsum is DLJ-01.

Example 13, like example 12, differs only in that: the redispersible latex powder has a bulk density of 500 g/L.

Example 14, like example 12, differs only in that: the redispersible latex powder has a bulk density of 400 g/L.

Examples 15-18, like example 13, differ only in that: the retarders are different and are shown in table 4.

TABLE 4

Examples	Retarder
		Example 13	HSG-1
Example 15	FYOK-101A
		Example 16	Sodium gluconate
Example 17	FYOK-101A and sodium gluconate are mixed according to the mass ratio of 1:1.4
		Example 18	FYOK-101A and sodium gluconate are mixed according to the mass ratio of 1:1.8

Examples 19-23, like example 17, differ only in that: the thixotropic agents are different and are shown in Table 5.

TABLE 5

Comparative example

Comparative example 1, like example 1, differs only in that: the mesh number of the vitrified micro bubbles is 80.

Comparative example 2, like example 1, differs only in that: the vitrified micro bubbles are replaced by expanded perlite (200 meshes).

Comparative example 3, like example 1, differs only in that: the alpha-high-strength gypsum is replaced by beta-gypsum DLJ-03.

Performance test

Aiming at the novel high-strength gypsum thermal insulation putty provided by the embodiments 1-23 and the comparative examples 1-3, the following performance tests are carried out.

1. Coefficient of thermal conductivity: the novel high-strength gypsum thermal-insulation putty provided by the examples 1-23 and the comparative examples 1-3 is tested for thermal conductivity (average temperature 25 ℃) after being placed at 25 ℃ for 7 days according to the JG/T253-2011 standard, and the test results are shown in Table 6.

2. Tensile bond strength: the novel high-strength gypsum thermal insulation putty provided by the examples 1-23 and the comparative examples 1-3 is tested for original tensile bonding strength (normal temperature 28d) and soaking tensile bonding strength (normal temperature 28d, soaking 7d) by referring to the JG/T253-2011 standard, and the test results are shown in Table 6.

3. Compressive strength: the novel high-strength gypsum thermal insulation putty provided by the examples 1-23 and the comparative examples 1-3 is tested for the compressive strength by referring to the JG/T253-2011 standard, and the test results are shown in the table 6.

TABLE 6

4. Freeze-thaw resistance: by referring to the JG/T253-2011 standard, freeze-thaw cycles are carried out on the novel high-strength gypsum heat-preservation putty provided by the examples 1-23 and the comparative examples 1-3, after 80 times of 70 ℃, 15 ℃ water drenching, 5 times of 50 ℃ heating and-20 ℃ freezing, the freeze-thaw cycles are recorded as 1, and after 30 times of freeze-thaw cycles, whether the novel high-strength gypsum heat-preservation putty provided by the examples 1-23 and the comparative examples 1-3 has hollowing, falling off and water seepage cracking is recorded, and the test results are shown in Table 7.

TABLE 7

The present application is described in detail below with reference to the test data provided in tables 6 and 7.

As can be seen from the embodiment 1 and the comparative example 1, the heat preservation effect is better than that of the common 80-mesh vitrified micro bubbles due to the adoption of the 200-mesh vitrified micro bubbles with lighter volume weight, and the tensile bonding strength and the compressive strength of the novel high-strength gypsum heat preservation putty corresponding to the 200-mesh vitrified micro bubbles are improved under the combined action of the alpha-high-strength gypsum and other components.

From this application embodiment 1 and comparative example 2 can know, the 200 mesh vitrified micro bubbles that this application adopted the unit weight lighter have effectively avoided phenomenons such as expanded perlite (200 meshes) hollowing fracture, have also avoided the problem that later stage heat preservation effect reduces, have improved the tensile bond strength and the compressive strength of novel gypsum heat preservation putty that excels in simultaneously.

As can be seen from the example 1 and the comparative example 3, the novel high-strength gypsum heat-insulating putty corresponding to the alpha-high-strength gypsum has lower heat conductivity coefficient, higher tensile bonding strength and compressive strength and better freeze-thaw resistance compared with the beta-gypsum DLJ-03.

From the examples 1 to 4, the content of each component is regulated, and the novel high-strength gypsum thermal insulation putty corresponding to the example 4 has good comprehensive performance, low heat conductivity coefficient, high tensile bonding strength and high compressive strength.

From the embodiment 4-10, the Walocel XM 20000PV and HK75000S are compounded to be used as cellulose ether, so that the heat insulation effect of the novel high-strength gypsum heat insulation putty can be improved, the mechanical strength is improved, the mass ratio of the Walocel XM 20000PV and the HK75000S is controlled, the heat conductivity coefficient of the novel high-strength gypsum heat insulation putty can be further reduced, and the tensile bonding strength and the compressive strength are improved.

From the examples 7 and 11 to 12, it can be known that when the alpha-high-strength gypsum is DLJ-02, the corresponding novel high-strength gypsum thermal-insulation putty has lower thermal conductivity, higher tensile bonding strength and compressive strength, and better effect than DLJ-01 and better effect than 200 meshes of alpha-high-strength gypsum.

From examples 12 to 14 of the present application, it can be seen that when the bulk density of the redispersible latex powder is 500g/L, the corresponding novel high-strength gypsum thermal insulation putty has a lower thermal conductivity, higher tensile bonding strength and compressive strength, and better effect than the redispersible latex powder with the bulk density of 400g/L and the 328N redispersible latex powder; and the 328N redispersible latex powder is superior to the redispersible latex powder with the bulk density of 400 g/L.

From the examples 13 and 15-18, it can be seen that the retarding agent is prepared by compounding FYOK-101A and sodium gluconate, and the mass ratio of the FYOK-101A to the sodium gluconate is controlled, so that the retarding effect is optimal, and the heat preservation effect and the mechanical strength of the novel high-strength gypsum heat preservation putty are improved.

From the examples 17 and 19 to 23, the MONORAL HR300 polyamide thixotropic agent and the hydrophobic fumed silica AEROSIL R972 are compounded to be used as the thixotropic agent, the sedimentation of the alpha-high-strength gypsum and the vitrified micro bubbles is prevented, the viscosity of a system is not reduced, the network structure and the higher acid value of the MONORAL HR300 polyamide thixotropic agent promote the compatibility of the thixotropic agent and cellulose ether, and the heat preservation effect and the mechanical strength, especially the water immersion tensile bonding strength of the novel high-strength gypsum heat preservation putty are improved.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.