Background technique
Polycarbonate sunshine board in currently available technology, it is most general in order to guarantee that it is able to use 10 years or more outdoors
Time method be exactly method by coextrusion, form the UV of one layer of 50 μm or more thickness on the surface of polycarbonate sunshine board
Layer, the UV layers of interior high concentration light stabilizer/ultraviolet absorbing agent for being 1%~15% containing concentration, light stabilizer/ultraviolet light used
Absorbent includes group-substituted acrylonitrile ultraviolet absorbing agent, Benzotriazole Ultraviolet Stabilizer and its derivative, triazines purple
One or more of ultraviolet absorbers and its derivative, benzophenone ultraviolet absorbent, hindered amine light stabilizer etc.
Compound.But above-mentioned light stabilizer/ultraviolet absorbing agent in the prior art is organic small molecule material, these are organic small
Molecular material can be thermally decomposed in process of production, generate a large amount of volatile contaminant, to cause to endanger to environment and human body
Evil.It is higher additionally, due to addition concentration, so that auxiliary agent is easy to be precipitated during producing sunlight board, result in the need for frequently clear
Mold cleaning tool and shaping platform.In the use process of polycarbonate sunshine board outdoors, small molecule auxiliary agent can be constantly precipitated, and cause surface
Dusting.Due to the influence of the conditions such as rainwater, moisture, illumination, light stabilizer/ultraviolet absorbing agent concentration can constantly reduce, UV
Thickness degree is constantly thinning, to limit the service life of sunlight board.
Summary of the invention
The present invention provides a kind of composite coating of absorbent containing nanometer ultraviolet ray to overcome the shortcomings of the prior art
Polycarbonate sunshine board and preparation method thereof is inhaled with eliminating in traditional sunlight board in the prior art using light stabilizer/ultraviolet light
Receive the drawback that agent pollutes big, degradable and easy precipitation and causes sunlight board service life limited.
The core of the polycarbonate sunshine board of the present invention composite coating of absorbent containing nanometer ultraviolet ray is to use one kind
Completely new nanometer ultraviolet ray absorbent composite coating scheme.
For composite coating in the present invention using polycarbonate as carrier, polycarbonate is selected from high-viscosity extruding grade polycarbonate board
Number, it typically can be arbitrarily selected from mould clone ET3117, ET3113, Lexan 0703R, Lexan 0703R and Lexan 103R etc.
One of trade mark.
The present invention is achieved by the following technical solutions:A kind of poly- carbonic acid of the composite coating of absorbent containing nanometer ultraviolet ray
Ester sunlight board, the polycarbonate sunshine board are that nanometer ultraviolet ray absorbent composite coating is compounded on polycarbonate support, are received
Rice ultraviolet absorbing agent composite coating is nanometer ultraviolet ray absorbent or nanometer ultraviolet ray absorbent and organic uv absorbers
Mixture, the preferred mixture of nanometer ultraviolet ray absorbent and organic uv absorbers, the parts by weight of polycarbonate support
It is 85~99 parts, the weight of the mixture of nanometer ultraviolet ray absorbent or nanometer ultraviolet ray absorbent and organic uv absorbers
Part is 1~15 part.
As the preferred embodiment of the present invention, the parts by weight of polycarbonate support are 88~95 parts, and nanometer ultraviolet ray is inhaled
The parts by weight for receiving the mixture of agent or nanometer ultraviolet ray absorbent and organic uv absorbers are 5~12 parts.
Wherein nanometer ultraviolet ray absorbent includes but is not limited in nano-titanium dioxide, nano zine oxide and nano-cerium oxide
One or more of compounds.Organic uv absorbers include but is not limited to group-substituted acrylonitrile ultraviolet absorbing agent, benzene
And triazole type ultraviolet absorbing agent and its derivative, triazine-based ultraviolet absorbent and its derivative, benzophenone ultraviolet
The compound of one or more of absorbent and hindered amine light stabilizer.
In order to improve the dispersibility and stability of nanometer ultraviolet ray absorbent, nanometer ultraviolet ray absorbent is wrapped using surface
Coating technique processing, nanometer ultraviolet ray absorbent preferably use aluminum oxide to carry out surface cladding to it.Nanometer ultraviolet ray absorbs
The form of agent is solid fines shape, and average grain diameter is 10~300nm, and preferably average grain diameter is 10~100nm.
The invention also discloses a kind of preparation sides of the polycarbonate sunshine board of composite coating of absorbent containing nanometer ultraviolet ray
Method, the preparation method specifically comprise the following steps:
(1)The mixture of nanometer ultraviolet ray absorbent or nanometer ultraviolet ray absorbent and organic uv absorbers and poly- carbonic acid
Ester carrier is mixed inside high-speed mixer in certain proportion according to respective parts by weight, and it is steady to be additionally added a certain amount of heat
Determine agent and lubricant;
(2)After high-speed mixer mixes, with automatic charging equipment by the hopper of mixture sucking double screw extruder, mix
Object passes through effective mixing of double screw extruder, and melting temperature is 240 DEG C~300 DEG C, and evenly dispersed nanometer ultraviolet ray is made
Absorbent composite coating raw material UV master batch;
(3)UV master batch and sunlight board substrate are separately added into and squeeze out machine host and UV subsidiary engine, by being coextruded unit, molding preparation
High durable polycarbonate sunshine board, thickness >=30 μ of the nanometer ultraviolet ray absorbent composite coating on polycarbonate sunshine board surface
M, preferably >=50 μm.
In step(1)In, nanometer ultraviolet ray absorbent or nanometer ultraviolet ray absorbent and organic uv absorbers it is mixed
The parts by weight for closing object are 1~15 part, and the parts by weight of polycarbonate support are 85~99 parts, the parts by weight of heat stabilizer are 0.2~
0.5 part, the parts by weight of lubricant are 0.1~0.6 part.
The beneficial effects of the invention are as follows:Light stabilizer/ultraviolet light is used in order to eliminate in traditional sunlight board in the prior art
Absorbent pollutes big, the degradable and easy drawback for being precipitated and causing sunlight board service life limited, and the present invention provides one kind to contain
The technology of polycarbonate sunshine board and preparation method thereof of nanometer ultraviolet ray absorbent composite coating, will significantly promote sunlight board
Service life.The polycarbonate sunshine board of the present invention composite coating of absorbent containing nanometer ultraviolet ray also has the following advantages that:1,
Nanometer ultraviolet ray absorbent have higher thermal stability, production process generate dust pollution and Organic Waste Gas Pollution more
It is few;2, during producing sunlight board, low molecule is precipitated less, improves production efficiency and quality;3, sunlight board is outdoors
Use process in, the service life that nanometer ultraviolet ray absorbent can be obviously improved sunlight board reaches 15 years or more.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
A kind of polycarbonate sunshine board of the composite coating of absorbent containing nanometer ultraviolet ray, the polycarbonate sunshine board are poly-
Nanometer ultraviolet ray absorbent composite coating is compounded on carbonic ester carrier, nanometer ultraviolet ray absorbent composite coating is that nanometer is ultraviolet
The mixture of light absorbers or nanometer ultraviolet ray absorbent and organic uv absorbers, preferably nanometer ultraviolet ray absorbent with have
The mixture of machine ultraviolet absorbing agent, the parts by weight of polycarbonate support are 85~99 parts, nanometer ultraviolet ray absorbent or nanometer
The parts by weight of the mixture of ultraviolet absorbing agent and organic uv absorbers are 1~15 part.Nanometer ultraviolet ray absorbent includes
But the compound for one or more of being not limited to nano-titanium dioxide, nano zine oxide and nano-cerium oxide.Organic uv
Absorbent include but is not limited to group-substituted acrylonitrile ultraviolet absorbing agent, Benzotriazole Ultraviolet Stabilizer and its derivative,
One of triazine-based ultraviolet absorbent and its derivative, benzophenone ultraviolet absorbent and hindered amine light stabilizer
Or several compound.
In order to improve the dispersibility and stability of nanometer ultraviolet ray absorbent, nanometer ultraviolet ray absorbent is wrapped using surface
Coating technique processing, nanometer ultraviolet ray absorbent preferably use aluminum oxide to carry out surface cladding to it.Nanometer ultraviolet ray absorbs
The form of agent is solid fines shape, and average grain diameter is 10~300nm, and preferably average grain diameter is 10~100nm.
The invention also discloses a kind of preparation sides of the polycarbonate sunshine board of composite coating of absorbent containing nanometer ultraviolet ray
Method, the preparation method specifically comprise the following steps:(1)Nanometer ultraviolet ray absorbent or nanometer ultraviolet ray absorbent and organic ultraviolet
The mixture and polycarbonate support of light absorbers according to respective parts by weight in certain proportion inside high-speed mixer into
Row mixing, is additionally added a certain amount of heat stabilizer and lubricant;Nanometer ultraviolet ray absorbent or nanometer ultraviolet ray absorbent with have
The parts by weight of the mixture of machine ultraviolet absorbing agent are 1~15 part, and the parts by weight of polycarbonate support are 85~99 parts, thermostabilization
The parts by weight of agent are 0.2~0.5 part, and the parts by weight of lubricant are 0.1~0.6 part;(2)After high-speed mixer mixes, use
The hopper of mixture sucking double screw extruder, mixture are passed through effective mixing of double screw extruder by automatic charging equipment,
Melting temperature is 240 DEG C~300 DEG C, and evenly dispersed nanometer ultraviolet ray absorbent composite coating raw material UV master batch is made;(3)It will
UV master batch and sunlight board substrate, which are separately added into, squeezes out machine host and UV subsidiary engine, and by being coextruded unit, it is poly- that molding prepares high durable
Carbonic ester sunlight board, thickness >=30 μm of the nanometer ultraviolet ray absorbent composite coating on polycarbonate sunshine board surface, preferably >=
50μm。
Finally it should be noted that the above content is merely illustrative of the technical solution of the present invention, rather than the present invention is protected
The limitation of range, the simple modification or equivalent replacement that those skilled in the art carry out technical solution of the present invention,
All without departing from the spirit and scope of technical solution of the present invention.