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Laser weldable compositions, products and uses thereof

A technology of composition and molded products, applied in the direction of laser welding equipment, welding/welding/cutting items, welding equipment, etc.

Active Publication Date: 2021-07-23
CHANG CHUN PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been challenging to achieve high transmittance for high-strength bonding of welded parts while achieving uniform laser transmittance in plastics

Method used

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  • Laser weldable compositions, products and uses thereof
  • Laser weldable compositions, products and uses thereof
  • Laser weldable compositions, products and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0092] Example 1: Sample 1 (S1)

[0093] Step 1: Prepare TCDDM modified polyester. 900 grams of PTA (molecular weight 166 g / mol; 5.42 moles, limiting reagent), 610 grams of BDO (molecular weight 90.12 g / mol; 6.77 moles) and 267 grams of TCDDM (molecular weight 196.28 g / mol; 1.36 moles) were put into the reaction device, and heated to 200-230° C. in the presence of a titanium-based catalyst while stirring slowly under a nitrogen atmosphere. When the water yield reaches 95% of the theoretical water yield, the esterification reaction is considered complete. The pressure is then reduced to 0.1mmHg and kept below 0.1mmHg at 240-250°C. A low vacuum was applied to reduce the pressure in the reactor whereby excess BDO (boiling point 230°C) was removed at this elevated temperature. The intrinsic viscosity of the polyester was controlled at 0.7 dL / g (or about 0.7-0.8 dL / g) by the torque of the stirrer to obtain a TCDDM-derived polyester (B-1) containing 19.96 wt% of TCDDM residues ....

example 2

[0096] Example 2: Sample 2 (S2)

[0097] Step 1: Prepare TCDDM modified polyester. Put 900 grams of PTA (5.42 moles, limited reagent), 682.5 grams of BDO (7.57 moles) and 106.8 grams of TCDDM (0.54 moles) into the reactor, and heat to 200-230 ° C in the presence of a titanium-based catalyst, while Stir slowly under nitrogen atmosphere. When the water yield reaches 95% of the theoretical water yield, the esterification reaction is considered complete. The pressure is then reduced to 0.1mmHg and kept below 0.1mmHg at 240-250°C. A low vacuum was applied to reduce the pressure in the reactor whereby excess BDO (boiling point 230°C) was removed at this elevated temperature. The intrinsic viscosity of the polyester was controlled at 0.7 dL / g (or about 0.7-0.8 dL / g) by the torque of the stirrer to obtain a TCDDM-derived polyester (B-2) containing 8.53 wt% of TCDDM residues .

[0098] Step 2: Incorporate TCDDM modified polyester B-2, and prepare polyester resin sample 2 (S2). Gl...

example 3

[0100] Example 3: Sample 3 (S3)

[0101] Step 1: Prepare TCDDM modified polyester. Put 900 grams of PTA (5.42 moles, limited reagent), 490 grams of BDO (5.44 moles) and 534 grams of TCDDM (2.72 moles) into the reactor, and heat to 200-230 ° C in the presence of a titanium-based catalyst, while Stir slowly under nitrogen atmosphere. When the water yield reaches 95% of the theoretical water yield, the esterification reaction is considered complete. The pressure is then reduced to 0.1mmHg and kept below 0.1mmHg at 240-250°C. A low vacuum was applied to reduce the pressure in the reactor whereby excess BDO (boiling point 230°C) was removed at this elevated temperature. The intrinsic viscosity of the polyester was controlled at 0.7 dL / g (or about 0.7-0.8 dL / g) by the torque of the stirrer to obtain a TCDDM-derived polyester (B-3) containing 36.03 wt% of TCDDM residues .

[0102] Step 2: Incorporate TCDDM modified polyester B-3, and prepare polyester resin sample 3 (S3). Glass...

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Abstract

The present invention provides laser weldable compositions, products and uses thereof. The laser weldable compositions in various examples include a tricyclodecane dimethanol-modified copolymer, a terephthalate-type polyester and an inorganic filler. Compared with compositions without the tricyclodecane dimethanol-modified copolymer, the compositions of the invention have improved, uniform laser transmittance, thereby welded products including the compositions have improved bonding strength and require stronger tensile strength to be torn apart.

Description

technical field [0001] This invention relates to a composition having high and consistent laser light transmission, in particular a laser weldable composition, light transmissive resin, molded article and radar sensor. Background technique [0002] Laser welding is a manufacturing technique that uses a laser beam to join two or more materials together. Metals and thermoplastics are two common materials used for laser welding. Laser welding needs to enter the welding area from one side of the part being welded, and form a weld as the intense laser rapidly heats the material. Laser beams are light amplified by exciting radiation, single-wavelength single-phase light with low beam divergence and high energy content, so heat is generated when it hits a surface. As a result, laser welding precisely controls the weld area, creating aesthetically pleasing welds with little damage to surrounding materials or sensitive electronics, and without generating any particles in the proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/04C08K7/14C08G63/199G01S13/88
CPCC08L67/02C08G63/199G01S17/02C08L2205/025C08K13/04C08K7/14C08G63/183B29C65/1635B29C66/1282B29C66/12841B29C66/14B29C65/8215B29C66/71B29K2105/16B29C66/7212B29K2509/14B29K2509/02B29C65/1616B29K2995/0027B29C66/73365C08K3/013B29K2067/00B29K2067/003B29K2067/006B29K2309/08B23K2103/42B23K26/24B23K35/24C08G63/127C08G63/137C08L67/00
Inventor 林得顺洪澄祥蔡欣宪郑博元林永昇黄坤源周俊彦
Owner CHANG CHUN PLASTICS CO LTD
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